9593 lines
340 KiB
Java
9593 lines
340 KiB
Java
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.view;
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import com.android.internal.R;
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import com.android.internal.view.menu.MenuBuilder;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Interpolator;
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import android.graphics.LinearGradient;
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import android.graphics.Matrix;
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import android.graphics.Paint;
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import android.graphics.PixelFormat;
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import android.graphics.Point;
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import android.graphics.PorterDuff;
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import android.graphics.PorterDuffXfermode;
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import android.graphics.Rect;
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import android.graphics.Region;
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import android.graphics.Shader;
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import android.graphics.drawable.ColorDrawable;
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import android.graphics.drawable.Drawable;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.Message;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.os.RemoteException;
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import android.os.SystemClock;
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import android.os.SystemProperties;
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import android.util.AttributeSet;
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import android.util.Config;
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import android.util.EventLog;
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import android.util.Log;
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import android.util.Pool;
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import android.util.Poolable;
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import android.util.PoolableManager;
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import android.util.Pools;
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import android.util.SparseArray;
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import android.view.ContextMenu.ContextMenuInfo;
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import android.view.accessibility.AccessibilityEvent;
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import android.view.accessibility.AccessibilityEventSource;
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import android.view.accessibility.AccessibilityManager;
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import android.view.animation.Animation;
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import android.view.animation.AnimationUtils;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputConnection;
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import android.view.inputmethod.InputMethodManager;
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import android.widget.ScrollBarDrawable;
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import java.lang.ref.SoftReference;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.WeakHashMap;
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/**
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* <p>
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* This class represents the basic building block for user interface components. A View
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* occupies a rectangular area on the screen and is responsible for drawing and
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* event handling. View is the base class for <em>widgets</em>, which are
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* used to create interactive UI components (buttons, text fields, etc.). The
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* {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which
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* are invisible containers that hold other Views (or other ViewGroups) and define
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* their layout properties.
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* </p>
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*
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* <div class="special">
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* <p>For an introduction to using this class to develop your
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* application's user interface, read the Developer Guide documentation on
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* <strong><a href="{@docRoot}guide/topics/ui/index.html">User Interface</a></strong>. Special topics
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* include:
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* <br/><a href="{@docRoot}guide/topics/ui/declaring-layout.html">Declaring Layout</a>
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* <br/><a href="{@docRoot}guide/topics/ui/menus.html">Creating Menus</a>
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* <br/><a href="{@docRoot}guide/topics/ui/layout-objects.html">Common Layout Objects</a>
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* <br/><a href="{@docRoot}guide/topics/ui/binding.html">Binding to Data with AdapterView</a>
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* <br/><a href="{@docRoot}guide/topics/ui/ui-events.html">Handling UI Events</a>
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* <br/><a href="{@docRoot}guide/topics/ui/themes.html">Applying Styles and Themes</a>
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* <br/><a href="{@docRoot}guide/topics/ui/custom-components.html">Building Custom Components</a>
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* <br/><a href="{@docRoot}guide/topics/ui/how-android-draws.html">How Android Draws Views</a>.
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* </p>
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* </div>
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*
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* <a name="Using"></a>
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* <h3>Using Views</h3>
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* <p>
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* All of the views in a window are arranged in a single tree. You can add views
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* either from code or by specifying a tree of views in one or more XML layout
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* files. There are many specialized subclasses of views that act as controls or
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* are capable of displaying text, images, or other content.
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* </p>
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* <p>
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* Once you have created a tree of views, there are typically a few types of
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* common operations you may wish to perform:
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* <ul>
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* <li><strong>Set properties:</strong> for example setting the text of a
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* {@link android.widget.TextView}. The available properties and the methods
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* that set them will vary among the different subclasses of views. Note that
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* properties that are known at build time can be set in the XML layout
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* files.</li>
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* <li><strong>Set focus:</strong> The framework will handled moving focus in
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* response to user input. To force focus to a specific view, call
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* {@link #requestFocus}.</li>
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* <li><strong>Set up listeners:</strong> Views allow clients to set listeners
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* that will be notified when something interesting happens to the view. For
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* example, all views will let you set a listener to be notified when the view
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* gains or loses focus. You can register such a listener using
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* {@link #setOnFocusChangeListener}. Other view subclasses offer more
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* specialized listeners. For example, a Button exposes a listener to notify
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* clients when the button is clicked.</li>
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* <li><strong>Set visibility:</strong> You can hide or show views using
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* {@link #setVisibility}.</li>
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* </ul>
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* </p>
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* <p><em>
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* Note: The Android framework is responsible for measuring, laying out and
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* drawing views. You should not call methods that perform these actions on
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* views yourself unless you are actually implementing a
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* {@link android.view.ViewGroup}.
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* </em></p>
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*
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* <a name="Lifecycle"></a>
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* <h3>Implementing a Custom View</h3>
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*
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* <p>
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* To implement a custom view, you will usually begin by providing overrides for
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* some of the standard methods that the framework calls on all views. You do
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* not need to override all of these methods. In fact, you can start by just
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* overriding {@link #onDraw(android.graphics.Canvas)}.
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* <table border="2" width="85%" align="center" cellpadding="5">
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* <thead>
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* <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr>
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* </thead>
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*
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* <tbody>
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* <tr>
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* <td rowspan="2">Creation</td>
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* <td>Constructors</td>
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* <td>There is a form of the constructor that are called when the view
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* is created from code and a form that is called when the view is
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* inflated from a layout file. The second form should parse and apply
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* any attributes defined in the layout file.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onFinishInflate()}</code></td>
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* <td>Called after a view and all of its children has been inflated
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* from XML.</td>
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* </tr>
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*
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* <tr>
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* <td rowspan="3">Layout</td>
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* <td><code>{@link #onMeasure}</code></td>
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* <td>Called to determine the size requirements for this view and all
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* of its children.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onLayout}</code></td>
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* <td>Called when this view should assign a size and position to all
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* of its children.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onSizeChanged}</code></td>
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* <td>Called when the size of this view has changed.
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* </td>
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* </tr>
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*
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* <tr>
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* <td>Drawing</td>
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* <td><code>{@link #onDraw}</code></td>
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* <td>Called when the view should render its content.
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* </td>
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* </tr>
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*
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* <tr>
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* <td rowspan="4">Event processing</td>
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* <td><code>{@link #onKeyDown}</code></td>
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* <td>Called when a new key event occurs.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onKeyUp}</code></td>
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* <td>Called when a key up event occurs.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onTrackballEvent}</code></td>
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* <td>Called when a trackball motion event occurs.
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* </td>
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* </tr>
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* <tr>
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* <td><code>{@link #onTouchEvent}</code></td>
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* <td>Called when a touch screen motion event occurs.
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* </td>
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* </tr>
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*
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* <tr>
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* <td rowspan="2">Focus</td>
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* <td><code>{@link #onFocusChanged}</code></td>
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* <td>Called when the view gains or loses focus.
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* </td>
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* </tr>
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*
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* <tr>
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* <td><code>{@link #onWindowFocusChanged}</code></td>
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* <td>Called when the window containing the view gains or loses focus.
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* </td>
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* </tr>
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*
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* <tr>
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* <td rowspan="3">Attaching</td>
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* <td><code>{@link #onAttachedToWindow()}</code></td>
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* <td>Called when the view is attached to a window.
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* </td>
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* </tr>
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*
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* <tr>
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* <td><code>{@link #onDetachedFromWindow}</code></td>
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* <td>Called when the view is detached from its window.
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* </td>
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* </tr>
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*
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* <tr>
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* <td><code>{@link #onWindowVisibilityChanged}</code></td>
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* <td>Called when the visibility of the window containing the view
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* has changed.
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* </td>
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* </tr>
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* </tbody>
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*
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* </table>
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* </p>
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*
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* <a name="IDs"></a>
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* <h3>IDs</h3>
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* Views may have an integer id associated with them. These ids are typically
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* assigned in the layout XML files, and are used to find specific views within
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* the view tree. A common pattern is to:
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* <ul>
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* <li>Define a Button in the layout file and assign it a unique ID.
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* <pre>
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* <Button id="@+id/my_button"
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* android:layout_width="wrap_content"
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* android:layout_height="wrap_content"
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* android:text="@string/my_button_text"/>
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* </pre></li>
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* <li>From the onCreate method of an Activity, find the Button
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* <pre class="prettyprint">
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* Button myButton = (Button) findViewById(R.id.my_button);
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* </pre></li>
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* </ul>
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* <p>
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* View IDs need not be unique throughout the tree, but it is good practice to
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* ensure that they are at least unique within the part of the tree you are
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* searching.
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* </p>
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*
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* <a name="Position"></a>
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* <h3>Position</h3>
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* <p>
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* The geometry of a view is that of a rectangle. A view has a location,
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* expressed as a pair of <em>left</em> and <em>top</em> coordinates, and
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* two dimensions, expressed as a width and a height. The unit for location
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* and dimensions is the pixel.
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* </p>
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*
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* <p>
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* It is possible to retrieve the location of a view by invoking the methods
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* {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X,
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* coordinate of the rectangle representing the view. The latter returns the
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* top, or Y, coordinate of the rectangle representing the view. These methods
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* both return the location of the view relative to its parent. For instance,
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* when getLeft() returns 20, that means the view is located 20 pixels to the
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* right of the left edge of its direct parent.
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* </p>
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*
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* <p>
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* In addition, several convenience methods are offered to avoid unnecessary
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* computations, namely {@link #getRight()} and {@link #getBottom()}.
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* These methods return the coordinates of the right and bottom edges of the
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* rectangle representing the view. For instance, calling {@link #getRight()}
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* is similar to the following computation: <code>getLeft() + getWidth()</code>
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* (see <a href="#SizePaddingMargins">Size</a> for more information about the width.)
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* </p>
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*
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* <a name="SizePaddingMargins"></a>
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* <h3>Size, padding and margins</h3>
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* <p>
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* The size of a view is expressed with a width and a height. A view actually
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* possess two pairs of width and height values.
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* </p>
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*
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* <p>
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* The first pair is known as <em>measured width</em> and
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* <em>measured height</em>. These dimensions define how big a view wants to be
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* within its parent (see <a href="#Layout">Layout</a> for more details.) The
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* measured dimensions can be obtained by calling {@link #getMeasuredWidth()}
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* and {@link #getMeasuredHeight()}.
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* </p>
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*
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* <p>
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* The second pair is simply known as <em>width</em> and <em>height</em>, or
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* sometimes <em>drawing width</em> and <em>drawing height</em>. These
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* dimensions define the actual size of the view on screen, at drawing time and
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* after layout. These values may, but do not have to, be different from the
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* measured width and height. The width and height can be obtained by calling
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* {@link #getWidth()} and {@link #getHeight()}.
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* </p>
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*
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* <p>
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* To measure its dimensions, a view takes into account its padding. The padding
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* is expressed in pixels for the left, top, right and bottom parts of the view.
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* Padding can be used to offset the content of the view by a specific amount of
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* pixels. For instance, a left padding of 2 will push the view's content by
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* 2 pixels to the right of the left edge. Padding can be set using the
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* {@link #setPadding(int, int, int, int)} method and queried by calling
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* {@link #getPaddingLeft()}, {@link #getPaddingTop()},
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* {@link #getPaddingRight()} and {@link #getPaddingBottom()}.
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* </p>
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*
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* <p>
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* Even though a view can define a padding, it does not provide any support for
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* margins. However, view groups provide such a support. Refer to
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* {@link android.view.ViewGroup} and
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* {@link android.view.ViewGroup.MarginLayoutParams} for further information.
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* </p>
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*
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* <a name="Layout"></a>
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* <h3>Layout</h3>
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* <p>
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* Layout is a two pass process: a measure pass and a layout pass. The measuring
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* pass is implemented in {@link #measure(int, int)} and is a top-down traversal
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* of the view tree. Each view pushes dimension specifications down the tree
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* during the recursion. At the end of the measure pass, every view has stored
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* its measurements. The second pass happens in
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* {@link #layout(int,int,int,int)} and is also top-down. During
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* this pass each parent is responsible for positioning all of its children
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* using the sizes computed in the measure pass.
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* </p>
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*
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* <p>
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* When a view's measure() method returns, its {@link #getMeasuredWidth()} and
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* {@link #getMeasuredHeight()} values must be set, along with those for all of
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* that view's descendants. A view's measured width and measured height values
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* must respect the constraints imposed by the view's parents. This guarantees
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* that at the end of the measure pass, all parents accept all of their
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* children's measurements. A parent view may call measure() more than once on
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* its children. For example, the parent may measure each child once with
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* unspecified dimensions to find out how big they want to be, then call
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* measure() on them again with actual numbers if the sum of all the children's
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* unconstrained sizes is too big or too small.
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* </p>
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*
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* <p>
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* The measure pass uses two classes to communicate dimensions. The
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* {@link MeasureSpec} class is used by views to tell their parents how they
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* want to be measured and positioned. The base LayoutParams class just
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* describes how big the view wants to be for both width and height. For each
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* dimension, it can specify one of:
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* <ul>
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* <li> an exact number
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* <li>MATCH_PARENT, which means the view wants to be as big as its parent
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* (minus padding)
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* <li> WRAP_CONTENT, which means that the view wants to be just big enough to
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* enclose its content (plus padding).
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* </ul>
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* There are subclasses of LayoutParams for different subclasses of ViewGroup.
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* For example, AbsoluteLayout has its own subclass of LayoutParams which adds
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* an X and Y value.
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* </p>
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*
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* <p>
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* MeasureSpecs are used to push requirements down the tree from parent to
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* child. A MeasureSpec can be in one of three modes:
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* <ul>
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* <li>UNSPECIFIED: This is used by a parent to determine the desired dimension
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* of a child view. For example, a LinearLayout may call measure() on its child
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* with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how
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* tall the child view wants to be given a width of 240 pixels.
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* <li>EXACTLY: This is used by the parent to impose an exact size on the
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* child. The child must use this size, and guarantee that all of its
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* descendants will fit within this size.
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* <li>AT_MOST: This is used by the parent to impose a maximum size on the
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* child. The child must gurantee that it and all of its descendants will fit
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* within this size.
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* </ul>
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* </p>
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*
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* <p>
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* To intiate a layout, call {@link #requestLayout}. This method is typically
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* called by a view on itself when it believes that is can no longer fit within
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* its current bounds.
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* </p>
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*
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* <a name="Drawing"></a>
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* <h3>Drawing</h3>
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* <p>
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* Drawing is handled by walking the tree and rendering each view that
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* intersects the the invalid region. Because the tree is traversed in-order,
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* this means that parents will draw before (i.e., behind) their children, with
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* siblings drawn in the order they appear in the tree.
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* If you set a background drawable for a View, then the View will draw it for you
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* before calling back to its <code>onDraw()</code> method.
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* </p>
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*
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* <p>
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* Note that the framework will not draw views that are not in the invalid region.
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* </p>
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*
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* <p>
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* To force a view to draw, call {@link #invalidate()}.
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* </p>
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*
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* <a name="EventHandlingThreading"></a>
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* <h3>Event Handling and Threading</h3>
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* <p>
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* The basic cycle of a view is as follows:
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* <ol>
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* <li>An event comes in and is dispatched to the appropriate view. The view
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* handles the event and notifies any listeners.</li>
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* <li>If in the course of processing the event, the view's bounds may need
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* to be changed, the view will call {@link #requestLayout()}.</li>
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* <li>Similarly, if in the course of processing the event the view's appearance
|
|
* may need to be changed, the view will call {@link #invalidate()}.</li>
|
|
* <li>If either {@link #requestLayout()} or {@link #invalidate()} were called,
|
|
* the framework will take care of measuring, laying out, and drawing the tree
|
|
* as appropriate.</li>
|
|
* </ol>
|
|
* </p>
|
|
*
|
|
* <p><em>Note: The entire view tree is single threaded. You must always be on
|
|
* the UI thread when calling any method on any view.</em>
|
|
* If you are doing work on other threads and want to update the state of a view
|
|
* from that thread, you should use a {@link Handler}.
|
|
* </p>
|
|
*
|
|
* <a name="FocusHandling"></a>
|
|
* <h3>Focus Handling</h3>
|
|
* <p>
|
|
* The framework will handle routine focus movement in response to user input.
|
|
* This includes changing the focus as views are removed or hidden, or as new
|
|
* views become available. Views indicate their willingness to take focus
|
|
* through the {@link #isFocusable} method. To change whether a view can take
|
|
* focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below)
|
|
* views indicate whether they still would like focus via {@link #isFocusableInTouchMode}
|
|
* and can change this via {@link #setFocusableInTouchMode(boolean)}.
|
|
* </p>
|
|
* <p>
|
|
* Focus movement is based on an algorithm which finds the nearest neighbor in a
|
|
* given direction. In rare cases, the default algorithm may not match the
|
|
* intended behavior of the developer. In these situations, you can provide
|
|
* explicit overrides by using these XML attributes in the layout file:
|
|
* <pre>
|
|
* nextFocusDown
|
|
* nextFocusLeft
|
|
* nextFocusRight
|
|
* nextFocusUp
|
|
* </pre>
|
|
* </p>
|
|
*
|
|
*
|
|
* <p>
|
|
* To get a particular view to take focus, call {@link #requestFocus()}.
|
|
* </p>
|
|
*
|
|
* <a name="TouchMode"></a>
|
|
* <h3>Touch Mode</h3>
|
|
* <p>
|
|
* When a user is navigating a user interface via directional keys such as a D-pad, it is
|
|
* necessary to give focus to actionable items such as buttons so the user can see
|
|
* what will take input. If the device has touch capabilities, however, and the user
|
|
* begins interacting with the interface by touching it, it is no longer necessary to
|
|
* always highlight, or give focus to, a particular view. This motivates a mode
|
|
* for interaction named 'touch mode'.
|
|
* </p>
|
|
* <p>
|
|
* For a touch capable device, once the user touches the screen, the device
|
|
* will enter touch mode. From this point onward, only views for which
|
|
* {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets.
|
|
* Other views that are touchable, like buttons, will not take focus when touched; they will
|
|
* only fire the on click listeners.
|
|
* </p>
|
|
* <p>
|
|
* Any time a user hits a directional key, such as a D-pad direction, the view device will
|
|
* exit touch mode, and find a view to take focus, so that the user may resume interacting
|
|
* with the user interface without touching the screen again.
|
|
* </p>
|
|
* <p>
|
|
* The touch mode state is maintained across {@link android.app.Activity}s. Call
|
|
* {@link #isInTouchMode} to see whether the device is currently in touch mode.
|
|
* </p>
|
|
*
|
|
* <a name="Scrolling"></a>
|
|
* <h3>Scrolling</h3>
|
|
* <p>
|
|
* The framework provides basic support for views that wish to internally
|
|
* scroll their content. This includes keeping track of the X and Y scroll
|
|
* offset as well as mechanisms for drawing scrollbars. See
|
|
* {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and
|
|
* {@link #awakenScrollBars()} for more details.
|
|
* </p>
|
|
*
|
|
* <a name="Tags"></a>
|
|
* <h3>Tags</h3>
|
|
* <p>
|
|
* Unlike IDs, tags are not used to identify views. Tags are essentially an
|
|
* extra piece of information that can be associated with a view. They are most
|
|
* often used as a convenience to store data related to views in the views
|
|
* themselves rather than by putting them in a separate structure.
|
|
* </p>
|
|
*
|
|
* <a name="Animation"></a>
|
|
* <h3>Animation</h3>
|
|
* <p>
|
|
* You can attach an {@link Animation} object to a view using
|
|
* {@link #setAnimation(Animation)} or
|
|
* {@link #startAnimation(Animation)}. The animation can alter the scale,
|
|
* rotation, translation and alpha of a view over time. If the animation is
|
|
* attached to a view that has children, the animation will affect the entire
|
|
* subtree rooted by that node. When an animation is started, the framework will
|
|
* take care of redrawing the appropriate views until the animation completes.
|
|
* </p>
|
|
*
|
|
* <a name="Security"></a>
|
|
* <h3>Security</h3>
|
|
* <p>
|
|
* Sometimes it is essential that an application be able to verify that an action
|
|
* is being performed with the full knowledge and consent of the user, such as
|
|
* granting a permission request, making a purchase or clicking on an advertisement.
|
|
* Unfortunately, a malicious application could try to spoof the user into
|
|
* performing these actions, unaware, by concealing the intended purpose of the view.
|
|
* As a remedy, the framework offers a touch filtering mechanism that can be used to
|
|
* improve the security of views that provide access to sensitive functionality.
|
|
* </p><p>
|
|
* To enable touch filtering, call {@link #setFilterTouchesWhenObscured} or set the
|
|
* andoird:filterTouchesWhenObscured attribute to true. When enabled, the framework
|
|
* will discard touches that are received whenever the view's window is obscured by
|
|
* another visible window. As a result, the view will not receive touches whenever a
|
|
* toast, dialog or other window appears above the view's window.
|
|
* </p><p>
|
|
* For more fine-grained control over security, consider overriding the
|
|
* {@link #onFilterTouchEventForSecurity} method to implement your own security policy.
|
|
* See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}.
|
|
* </p>
|
|
*
|
|
* @attr ref android.R.styleable#View_background
|
|
* @attr ref android.R.styleable#View_clickable
|
|
* @attr ref android.R.styleable#View_contentDescription
|
|
* @attr ref android.R.styleable#View_drawingCacheQuality
|
|
* @attr ref android.R.styleable#View_duplicateParentState
|
|
* @attr ref android.R.styleable#View_id
|
|
* @attr ref android.R.styleable#View_fadingEdge
|
|
* @attr ref android.R.styleable#View_fadingEdgeLength
|
|
* @attr ref android.R.styleable#View_filterTouchesWhenObscured
|
|
* @attr ref android.R.styleable#View_fitsSystemWindows
|
|
* @attr ref android.R.styleable#View_isScrollContainer
|
|
* @attr ref android.R.styleable#View_focusable
|
|
* @attr ref android.R.styleable#View_focusableInTouchMode
|
|
* @attr ref android.R.styleable#View_hapticFeedbackEnabled
|
|
* @attr ref android.R.styleable#View_keepScreenOn
|
|
* @attr ref android.R.styleable#View_longClickable
|
|
* @attr ref android.R.styleable#View_minHeight
|
|
* @attr ref android.R.styleable#View_minWidth
|
|
* @attr ref android.R.styleable#View_nextFocusDown
|
|
* @attr ref android.R.styleable#View_nextFocusLeft
|
|
* @attr ref android.R.styleable#View_nextFocusRight
|
|
* @attr ref android.R.styleable#View_nextFocusUp
|
|
* @attr ref android.R.styleable#View_onClick
|
|
* @attr ref android.R.styleable#View_padding
|
|
* @attr ref android.R.styleable#View_paddingBottom
|
|
* @attr ref android.R.styleable#View_paddingLeft
|
|
* @attr ref android.R.styleable#View_paddingRight
|
|
* @attr ref android.R.styleable#View_paddingTop
|
|
* @attr ref android.R.styleable#View_saveEnabled
|
|
* @attr ref android.R.styleable#View_scrollX
|
|
* @attr ref android.R.styleable#View_scrollY
|
|
* @attr ref android.R.styleable#View_scrollbarSize
|
|
* @attr ref android.R.styleable#View_scrollbarStyle
|
|
* @attr ref android.R.styleable#View_scrollbars
|
|
* @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade
|
|
* @attr ref android.R.styleable#View_scrollbarFadeDuration
|
|
* @attr ref android.R.styleable#View_scrollbarTrackHorizontal
|
|
* @attr ref android.R.styleable#View_scrollbarThumbHorizontal
|
|
* @attr ref android.R.styleable#View_scrollbarThumbVertical
|
|
* @attr ref android.R.styleable#View_scrollbarTrackVertical
|
|
* @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack
|
|
* @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack
|
|
* @attr ref android.R.styleable#View_soundEffectsEnabled
|
|
* @attr ref android.R.styleable#View_tag
|
|
* @attr ref android.R.styleable#View_visibility
|
|
*
|
|
* @see android.view.ViewGroup
|
|
*/
|
|
public class View implements Drawable.Callback, KeyEvent.Callback, AccessibilityEventSource {
|
|
private static final boolean DBG = false;
|
|
|
|
/**
|
|
* The logging tag used by this class with android.util.Log.
|
|
*/
|
|
protected static final String VIEW_LOG_TAG = "View";
|
|
|
|
/**
|
|
* Used to mark a View that has no ID.
|
|
*/
|
|
public static final int NO_ID = -1;
|
|
|
|
/**
|
|
* This view does not want keystrokes. Use with TAKES_FOCUS_MASK when
|
|
* calling setFlags.
|
|
*/
|
|
private static final int NOT_FOCUSABLE = 0x00000000;
|
|
|
|
/**
|
|
* This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling
|
|
* setFlags.
|
|
*/
|
|
private static final int FOCUSABLE = 0x00000001;
|
|
|
|
/**
|
|
* Mask for use with setFlags indicating bits used for focus.
|
|
*/
|
|
private static final int FOCUSABLE_MASK = 0x00000001;
|
|
|
|
/**
|
|
* This view will adjust its padding to fit sytem windows (e.g. status bar)
|
|
*/
|
|
private static final int FITS_SYSTEM_WINDOWS = 0x00000002;
|
|
|
|
/**
|
|
* This view is visible. Use with {@link #setVisibility}.
|
|
*/
|
|
public static final int VISIBLE = 0x00000000;
|
|
|
|
/**
|
|
* This view is invisible, but it still takes up space for layout purposes.
|
|
* Use with {@link #setVisibility}.
|
|
*/
|
|
public static final int INVISIBLE = 0x00000004;
|
|
|
|
/**
|
|
* This view is invisible, and it doesn't take any space for layout
|
|
* purposes. Use with {@link #setVisibility}.
|
|
*/
|
|
public static final int GONE = 0x00000008;
|
|
|
|
/**
|
|
* Mask for use with setFlags indicating bits used for visibility.
|
|
* {@hide}
|
|
*/
|
|
static final int VISIBILITY_MASK = 0x0000000C;
|
|
|
|
private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE};
|
|
|
|
/**
|
|
* This view is enabled. Intrepretation varies by subclass.
|
|
* Use with ENABLED_MASK when calling setFlags.
|
|
* {@hide}
|
|
*/
|
|
static final int ENABLED = 0x00000000;
|
|
|
|
/**
|
|
* This view is disabled. Intrepretation varies by subclass.
|
|
* Use with ENABLED_MASK when calling setFlags.
|
|
* {@hide}
|
|
*/
|
|
static final int DISABLED = 0x00000020;
|
|
|
|
/**
|
|
* Mask for use with setFlags indicating bits used for indicating whether
|
|
* this view is enabled
|
|
* {@hide}
|
|
*/
|
|
static final int ENABLED_MASK = 0x00000020;
|
|
|
|
/**
|
|
* This view won't draw. {@link #onDraw} won't be called and further
|
|
* optimizations
|
|
* will be performed. It is okay to have this flag set and a background.
|
|
* Use with DRAW_MASK when calling setFlags.
|
|
* {@hide}
|
|
*/
|
|
static final int WILL_NOT_DRAW = 0x00000080;
|
|
|
|
/**
|
|
* Mask for use with setFlags indicating bits used for indicating whether
|
|
* this view is will draw
|
|
* {@hide}
|
|
*/
|
|
static final int DRAW_MASK = 0x00000080;
|
|
|
|
/**
|
|
* <p>This view doesn't show scrollbars.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_NONE = 0x00000000;
|
|
|
|
/**
|
|
* <p>This view shows horizontal scrollbars.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_HORIZONTAL = 0x00000100;
|
|
|
|
/**
|
|
* <p>This view shows vertical scrollbars.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_VERTICAL = 0x00000200;
|
|
|
|
/**
|
|
* <p>Mask for use with setFlags indicating bits used for indicating which
|
|
* scrollbars are enabled.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_MASK = 0x00000300;
|
|
|
|
/**
|
|
* Indicates that the view should filter touches when its window is obscured.
|
|
* Refer to the class comments for more information about this security feature.
|
|
* {@hide}
|
|
*/
|
|
static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400;
|
|
|
|
// note flag value 0x00000800 is now available for next flags...
|
|
|
|
/**
|
|
* <p>This view doesn't show fading edges.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int FADING_EDGE_NONE = 0x00000000;
|
|
|
|
/**
|
|
* <p>This view shows horizontal fading edges.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int FADING_EDGE_HORIZONTAL = 0x00001000;
|
|
|
|
/**
|
|
* <p>This view shows vertical fading edges.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int FADING_EDGE_VERTICAL = 0x00002000;
|
|
|
|
/**
|
|
* <p>Mask for use with setFlags indicating bits used for indicating which
|
|
* fading edges are enabled.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int FADING_EDGE_MASK = 0x00003000;
|
|
|
|
/**
|
|
* <p>Indicates this view can be clicked. When clickable, a View reacts
|
|
* to clicks by notifying the OnClickListener.<p>
|
|
* {@hide}
|
|
*/
|
|
static final int CLICKABLE = 0x00004000;
|
|
|
|
/**
|
|
* <p>Indicates this view is caching its drawing into a bitmap.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int DRAWING_CACHE_ENABLED = 0x00008000;
|
|
|
|
/**
|
|
* <p>Indicates that no icicle should be saved for this view.<p>
|
|
* {@hide}
|
|
*/
|
|
static final int SAVE_DISABLED = 0x000010000;
|
|
|
|
/**
|
|
* <p>Mask for use with setFlags indicating bits used for the saveEnabled
|
|
* property.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int SAVE_DISABLED_MASK = 0x000010000;
|
|
|
|
/**
|
|
* <p>Indicates that no drawing cache should ever be created for this view.<p>
|
|
* {@hide}
|
|
*/
|
|
static final int WILL_NOT_CACHE_DRAWING = 0x000020000;
|
|
|
|
/**
|
|
* <p>Indicates this view can take / keep focus when int touch mode.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000;
|
|
|
|
/**
|
|
* <p>Enables low quality mode for the drawing cache.</p>
|
|
*/
|
|
public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000;
|
|
|
|
/**
|
|
* <p>Enables high quality mode for the drawing cache.</p>
|
|
*/
|
|
public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000;
|
|
|
|
/**
|
|
* <p>Enables automatic quality mode for the drawing cache.</p>
|
|
*/
|
|
public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000;
|
|
|
|
private static final int[] DRAWING_CACHE_QUALITY_FLAGS = {
|
|
DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH
|
|
};
|
|
|
|
/**
|
|
* <p>Mask for use with setFlags indicating bits used for the cache
|
|
* quality property.</p>
|
|
* {@hide}
|
|
*/
|
|
static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000;
|
|
|
|
/**
|
|
* <p>
|
|
* Indicates this view can be long clicked. When long clickable, a View
|
|
* reacts to long clicks by notifying the OnLongClickListener or showing a
|
|
* context menu.
|
|
* </p>
|
|
* {@hide}
|
|
*/
|
|
static final int LONG_CLICKABLE = 0x00200000;
|
|
|
|
/**
|
|
* <p>Indicates that this view gets its drawable states from its direct parent
|
|
* and ignores its original internal states.</p>
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int DUPLICATE_PARENT_STATE = 0x00400000;
|
|
|
|
/**
|
|
* The scrollbar style to display the scrollbars inside the content area,
|
|
* without increasing the padding. The scrollbars will be overlaid with
|
|
* translucency on the view's content.
|
|
*/
|
|
public static final int SCROLLBARS_INSIDE_OVERLAY = 0;
|
|
|
|
/**
|
|
* The scrollbar style to display the scrollbars inside the padded area,
|
|
* increasing the padding of the view. The scrollbars will not overlap the
|
|
* content area of the view.
|
|
*/
|
|
public static final int SCROLLBARS_INSIDE_INSET = 0x01000000;
|
|
|
|
/**
|
|
* The scrollbar style to display the scrollbars at the edge of the view,
|
|
* without increasing the padding. The scrollbars will be overlaid with
|
|
* translucency.
|
|
*/
|
|
public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000;
|
|
|
|
/**
|
|
* The scrollbar style to display the scrollbars at the edge of the view,
|
|
* increasing the padding of the view. The scrollbars will only overlap the
|
|
* background, if any.
|
|
*/
|
|
public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000;
|
|
|
|
/**
|
|
* Mask to check if the scrollbar style is overlay or inset.
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_INSET_MASK = 0x01000000;
|
|
|
|
/**
|
|
* Mask to check if the scrollbar style is inside or outside.
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000;
|
|
|
|
/**
|
|
* Mask for scrollbar style.
|
|
* {@hide}
|
|
*/
|
|
static final int SCROLLBARS_STYLE_MASK = 0x03000000;
|
|
|
|
/**
|
|
* View flag indicating that the screen should remain on while the
|
|
* window containing this view is visible to the user. This effectively
|
|
* takes care of automatically setting the WindowManager's
|
|
* {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}.
|
|
*/
|
|
public static final int KEEP_SCREEN_ON = 0x04000000;
|
|
|
|
/**
|
|
* View flag indicating whether this view should have sound effects enabled
|
|
* for events such as clicking and touching.
|
|
*/
|
|
public static final int SOUND_EFFECTS_ENABLED = 0x08000000;
|
|
|
|
/**
|
|
* View flag indicating whether this view should have haptic feedback
|
|
* enabled for events such as long presses.
|
|
*/
|
|
public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000;
|
|
|
|
/**
|
|
* View flag indicating whether {@link #addFocusables(ArrayList, int, int)}
|
|
* should add all focusable Views regardless if they are focusable in touch mode.
|
|
*/
|
|
public static final int FOCUSABLES_ALL = 0x00000000;
|
|
|
|
/**
|
|
* View flag indicating whether {@link #addFocusables(ArrayList, int, int)}
|
|
* should add only Views focusable in touch mode.
|
|
*/
|
|
public static final int FOCUSABLES_TOUCH_MODE = 0x00000001;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus to the previous selectable
|
|
* item.
|
|
*/
|
|
public static final int FOCUS_BACKWARD = 0x00000001;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus to the next selectable
|
|
* item.
|
|
*/
|
|
public static final int FOCUS_FORWARD = 0x00000002;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus to the left.
|
|
*/
|
|
public static final int FOCUS_LEFT = 0x00000011;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus up.
|
|
*/
|
|
public static final int FOCUS_UP = 0x00000021;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus to the right.
|
|
*/
|
|
public static final int FOCUS_RIGHT = 0x00000042;
|
|
|
|
/**
|
|
* Use with {@link #focusSearch}. Move focus down.
|
|
*/
|
|
public static final int FOCUS_DOWN = 0x00000082;
|
|
|
|
/**
|
|
* Base View state sets
|
|
*/
|
|
// Singles
|
|
/**
|
|
* Indicates the view has no states set. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
*/
|
|
protected static final int[] EMPTY_STATE_SET = {};
|
|
/**
|
|
* Indicates the view is enabled. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
*/
|
|
protected static final int[] ENABLED_STATE_SET = {R.attr.state_enabled};
|
|
/**
|
|
* Indicates the view is focused. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
*/
|
|
protected static final int[] FOCUSED_STATE_SET = {R.attr.state_focused};
|
|
/**
|
|
* Indicates the view is selected. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
*/
|
|
protected static final int[] SELECTED_STATE_SET = {R.attr.state_selected};
|
|
/**
|
|
* Indicates the view is pressed. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
* @hide
|
|
*/
|
|
protected static final int[] PRESSED_STATE_SET = {R.attr.state_pressed};
|
|
/**
|
|
* Indicates the view's window has focus. States are used with
|
|
* {@link android.graphics.drawable.Drawable} to change the drawing of the
|
|
* view depending on its state.
|
|
*
|
|
* @see android.graphics.drawable.Drawable
|
|
* @see #getDrawableState()
|
|
*/
|
|
protected static final int[] WINDOW_FOCUSED_STATE_SET =
|
|
{R.attr.state_window_focused};
|
|
// Doubles
|
|
/**
|
|
* Indicates the view is enabled and has the focus.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_FOCUSED_STATE_SET =
|
|
stateSetUnion(ENABLED_STATE_SET, FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is enabled and selected.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_SELECTED_STATE_SET =
|
|
stateSetUnion(ENABLED_STATE_SET, SELECTED_STATE_SET);
|
|
/**
|
|
* Indicates the view is enabled and that its window has focus.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(ENABLED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is focused and selected.
|
|
*
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
*/
|
|
protected static final int[] FOCUSED_SELECTED_STATE_SET =
|
|
stateSetUnion(FOCUSED_STATE_SET, SELECTED_STATE_SET);
|
|
/**
|
|
* Indicates the view has the focus and that its window has the focus.
|
|
*
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(FOCUSED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is selected and that its window has the focus.
|
|
*
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
// Triples
|
|
/**
|
|
* Indicates the view is enabled, focused and selected.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET =
|
|
stateSetUnion(ENABLED_FOCUSED_STATE_SET, SELECTED_STATE_SET);
|
|
/**
|
|
* Indicates the view is enabled, focused and its window has the focus.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(ENABLED_FOCUSED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is enabled, selected and its window has the focus.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(ENABLED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is focused, selected and its window has the focus.
|
|
*
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(FOCUSED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
/**
|
|
* Indicates the view is enabled, focused, selected and its window
|
|
* has the focus.
|
|
*
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(ENABLED_FOCUSED_SELECTED_STATE_SET,
|
|
WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed and its window has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed and selected.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_SELECTED_STATE_SET =
|
|
stateSetUnion(PRESSED_STATE_SET, SELECTED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, selected and its window has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed and focused.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_STATE_SET, FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, focused and its window has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_FOCUSED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, focused and selected.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET =
|
|
stateSetUnion(PRESSED_FOCUSED_STATE_SET, SELECTED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, focused, selected and its window has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_FOCUSED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed and enabled.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_STATE_SET =
|
|
stateSetUnion(PRESSED_STATE_SET, ENABLED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled and its window has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled and selected.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_STATE_SET, SELECTED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled, selected and its window has the
|
|
* focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled and focused.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_STATE_SET, FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled, focused and its window has the
|
|
* focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_FOCUSED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled, focused and selected.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_FOCUSED_STATE_SET, SELECTED_STATE_SET);
|
|
|
|
/**
|
|
* Indicates the view is pressed, enabled, focused, selected and its window
|
|
* has the focus.
|
|
*
|
|
* @see #PRESSED_STATE_SET
|
|
* @see #ENABLED_STATE_SET
|
|
* @see #SELECTED_STATE_SET
|
|
* @see #FOCUSED_STATE_SET
|
|
* @see #WINDOW_FOCUSED_STATE_SET
|
|
*/
|
|
protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET =
|
|
stateSetUnion(PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, WINDOW_FOCUSED_STATE_SET);
|
|
|
|
/**
|
|
* The order here is very important to {@link #getDrawableState()}
|
|
*/
|
|
private static final int[][] VIEW_STATE_SETS = {
|
|
EMPTY_STATE_SET, // 0 0 0 0 0
|
|
WINDOW_FOCUSED_STATE_SET, // 0 0 0 0 1
|
|
SELECTED_STATE_SET, // 0 0 0 1 0
|
|
SELECTED_WINDOW_FOCUSED_STATE_SET, // 0 0 0 1 1
|
|
FOCUSED_STATE_SET, // 0 0 1 0 0
|
|
FOCUSED_WINDOW_FOCUSED_STATE_SET, // 0 0 1 0 1
|
|
FOCUSED_SELECTED_STATE_SET, // 0 0 1 1 0
|
|
FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 0 0 1 1 1
|
|
ENABLED_STATE_SET, // 0 1 0 0 0
|
|
ENABLED_WINDOW_FOCUSED_STATE_SET, // 0 1 0 0 1
|
|
ENABLED_SELECTED_STATE_SET, // 0 1 0 1 0
|
|
ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 0 1 0 1 1
|
|
ENABLED_FOCUSED_STATE_SET, // 0 1 1 0 0
|
|
ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, // 0 1 1 0 1
|
|
ENABLED_FOCUSED_SELECTED_STATE_SET, // 0 1 1 1 0
|
|
ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 0 1 1 1 1
|
|
PRESSED_STATE_SET, // 1 0 0 0 0
|
|
PRESSED_WINDOW_FOCUSED_STATE_SET, // 1 0 0 0 1
|
|
PRESSED_SELECTED_STATE_SET, // 1 0 0 1 0
|
|
PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 1 0 0 1 1
|
|
PRESSED_FOCUSED_STATE_SET, // 1 0 1 0 0
|
|
PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, // 1 0 1 0 1
|
|
PRESSED_FOCUSED_SELECTED_STATE_SET, // 1 0 1 1 0
|
|
PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 1 0 1 1 1
|
|
PRESSED_ENABLED_STATE_SET, // 1 1 0 0 0
|
|
PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET, // 1 1 0 0 1
|
|
PRESSED_ENABLED_SELECTED_STATE_SET, // 1 1 0 1 0
|
|
PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 1 1 0 1 1
|
|
PRESSED_ENABLED_FOCUSED_STATE_SET, // 1 1 1 0 0
|
|
PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, // 1 1 1 0 1
|
|
PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, // 1 1 1 1 0
|
|
PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, // 1 1 1 1 1
|
|
};
|
|
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is showing the last item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] LAST_STATE_SET = {R.attr.state_last};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is showing the first item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] FIRST_STATE_SET = {R.attr.state_first};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is showing the middle item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] MIDDLE_STATE_SET = {R.attr.state_middle};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is showing only one item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] SINGLE_STATE_SET = {R.attr.state_single};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is pressed and showing the last item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] PRESSED_LAST_STATE_SET = {R.attr.state_last, R.attr.state_pressed};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is pressed and showing the first item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] PRESSED_FIRST_STATE_SET = {R.attr.state_first, R.attr.state_pressed};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is pressed and showing the middle item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] PRESSED_MIDDLE_STATE_SET = {R.attr.state_middle, R.attr.state_pressed};
|
|
/**
|
|
* Used by views that contain lists of items. This state indicates that
|
|
* the view is pressed and showing only one item.
|
|
* @hide
|
|
*/
|
|
protected static final int[] PRESSED_SINGLE_STATE_SET = {R.attr.state_single, R.attr.state_pressed};
|
|
|
|
/**
|
|
* Temporary Rect currently for use in setBackground(). This will probably
|
|
* be extended in the future to hold our own class with more than just
|
|
* a Rect. :)
|
|
*/
|
|
static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>();
|
|
|
|
/**
|
|
* Map used to store views' tags.
|
|
*/
|
|
private static WeakHashMap<View, SparseArray<Object>> sTags;
|
|
|
|
/**
|
|
* Lock used to access sTags.
|
|
*/
|
|
private static final Object sTagsLock = new Object();
|
|
|
|
/**
|
|
* The animation currently associated with this view.
|
|
* @hide
|
|
*/
|
|
protected Animation mCurrentAnimation = null;
|
|
|
|
/**
|
|
* Width as measured during measure pass.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "measurement")
|
|
protected int mMeasuredWidth;
|
|
|
|
/**
|
|
* Height as measured during measure pass.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "measurement")
|
|
protected int mMeasuredHeight;
|
|
|
|
/**
|
|
* The view's identifier.
|
|
* {@hide}
|
|
*
|
|
* @see #setId(int)
|
|
* @see #getId()
|
|
*/
|
|
@ViewDebug.ExportedProperty(resolveId = true)
|
|
int mID = NO_ID;
|
|
|
|
/**
|
|
* The view's tag.
|
|
* {@hide}
|
|
*
|
|
* @see #setTag(Object)
|
|
* @see #getTag()
|
|
*/
|
|
protected Object mTag;
|
|
|
|
// for mPrivateFlags:
|
|
/** {@hide} */
|
|
static final int WANTS_FOCUS = 0x00000001;
|
|
/** {@hide} */
|
|
static final int FOCUSED = 0x00000002;
|
|
/** {@hide} */
|
|
static final int SELECTED = 0x00000004;
|
|
/** {@hide} */
|
|
static final int IS_ROOT_NAMESPACE = 0x00000008;
|
|
/** {@hide} */
|
|
static final int HAS_BOUNDS = 0x00000010;
|
|
/** {@hide} */
|
|
static final int DRAWN = 0x00000020;
|
|
/**
|
|
* When this flag is set, this view is running an animation on behalf of its
|
|
* children and should therefore not cancel invalidate requests, even if they
|
|
* lie outside of this view's bounds.
|
|
*
|
|
* {@hide}
|
|
*/
|
|
static final int DRAW_ANIMATION = 0x00000040;
|
|
/** {@hide} */
|
|
static final int SKIP_DRAW = 0x00000080;
|
|
/** {@hide} */
|
|
static final int ONLY_DRAWS_BACKGROUND = 0x00000100;
|
|
/** {@hide} */
|
|
static final int REQUEST_TRANSPARENT_REGIONS = 0x00000200;
|
|
/** {@hide} */
|
|
static final int DRAWABLE_STATE_DIRTY = 0x00000400;
|
|
/** {@hide} */
|
|
static final int MEASURED_DIMENSION_SET = 0x00000800;
|
|
/** {@hide} */
|
|
static final int FORCE_LAYOUT = 0x00001000;
|
|
/** {@hide} */
|
|
static final int LAYOUT_REQUIRED = 0x00002000;
|
|
|
|
private static final int PRESSED = 0x00004000;
|
|
|
|
/** {@hide} */
|
|
static final int DRAWING_CACHE_VALID = 0x00008000;
|
|
/**
|
|
* Flag used to indicate that this view should be drawn once more (and only once
|
|
* more) after its animation has completed.
|
|
* {@hide}
|
|
*/
|
|
static final int ANIMATION_STARTED = 0x00010000;
|
|
|
|
private static final int SAVE_STATE_CALLED = 0x00020000;
|
|
|
|
/**
|
|
* Indicates that the View returned true when onSetAlpha() was called and that
|
|
* the alpha must be restored.
|
|
* {@hide}
|
|
*/
|
|
static final int ALPHA_SET = 0x00040000;
|
|
|
|
/**
|
|
* Set by {@link #setScrollContainer(boolean)}.
|
|
*/
|
|
static final int SCROLL_CONTAINER = 0x00080000;
|
|
|
|
/**
|
|
* Set by {@link #setScrollContainer(boolean)}.
|
|
*/
|
|
static final int SCROLL_CONTAINER_ADDED = 0x00100000;
|
|
|
|
/**
|
|
* View flag indicating whether this view was invalidated (fully or partially.)
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int DIRTY = 0x00200000;
|
|
|
|
/**
|
|
* View flag indicating whether this view was invalidated by an opaque
|
|
* invalidate request.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int DIRTY_OPAQUE = 0x00400000;
|
|
|
|
/**
|
|
* Mask for {@link #DIRTY} and {@link #DIRTY_OPAQUE}.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int DIRTY_MASK = 0x00600000;
|
|
|
|
/**
|
|
* Indicates whether the background is opaque.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int OPAQUE_BACKGROUND = 0x00800000;
|
|
|
|
/**
|
|
* Indicates whether the scrollbars are opaque.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int OPAQUE_SCROLLBARS = 0x01000000;
|
|
|
|
/**
|
|
* Indicates whether the view is opaque.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int OPAQUE_MASK = 0x01800000;
|
|
|
|
/**
|
|
* Indicates a prepressed state;
|
|
* the short time between ACTION_DOWN and recognizing
|
|
* a 'real' press. Prepressed is used to recognize quick taps
|
|
* even when they are shorter than ViewConfiguration.getTapTimeout().
|
|
*
|
|
* @hide
|
|
*/
|
|
private static final int PREPRESSED = 0x02000000;
|
|
|
|
/**
|
|
* Indicates whether the view is temporarily detached.
|
|
*
|
|
* @hide
|
|
*/
|
|
static final int CANCEL_NEXT_UP_EVENT = 0x04000000;
|
|
|
|
/**
|
|
* Indicates that we should awaken scroll bars once attached
|
|
*
|
|
* @hide
|
|
*/
|
|
private static final int AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000;
|
|
|
|
/**
|
|
* Always allow a user to over-scroll this view, provided it is a
|
|
* view that can scroll.
|
|
*
|
|
* @see #getOverScrollMode()
|
|
* @see #setOverScrollMode(int)
|
|
*/
|
|
public static final int OVER_SCROLL_ALWAYS = 0;
|
|
|
|
/**
|
|
* Allow a user to over-scroll this view only if the content is large
|
|
* enough to meaningfully scroll, provided it is a view that can scroll.
|
|
*
|
|
* @see #getOverScrollMode()
|
|
* @see #setOverScrollMode(int)
|
|
*/
|
|
public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1;
|
|
|
|
/**
|
|
* Never allow a user to over-scroll this view.
|
|
*
|
|
* @see #getOverScrollMode()
|
|
* @see #setOverScrollMode(int)
|
|
*/
|
|
public static final int OVER_SCROLL_NEVER = 2;
|
|
|
|
/**
|
|
* Controls the over-scroll mode for this view.
|
|
* See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)},
|
|
* {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS},
|
|
* and {@link #OVER_SCROLL_NEVER}.
|
|
*/
|
|
private int mOverScrollMode;
|
|
|
|
/**
|
|
* The parent this view is attached to.
|
|
* {@hide}
|
|
*
|
|
* @see #getParent()
|
|
*/
|
|
protected ViewParent mParent;
|
|
|
|
/**
|
|
* {@hide}
|
|
*/
|
|
AttachInfo mAttachInfo;
|
|
|
|
/**
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(flagMapping = {
|
|
@ViewDebug.FlagToString(mask = FORCE_LAYOUT, equals = FORCE_LAYOUT,
|
|
name = "FORCE_LAYOUT"),
|
|
@ViewDebug.FlagToString(mask = LAYOUT_REQUIRED, equals = LAYOUT_REQUIRED,
|
|
name = "LAYOUT_REQUIRED"),
|
|
@ViewDebug.FlagToString(mask = DRAWING_CACHE_VALID, equals = DRAWING_CACHE_VALID,
|
|
name = "DRAWING_CACHE_INVALID", outputIf = false),
|
|
@ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "DRAWN", outputIf = true),
|
|
@ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "NOT_DRAWN", outputIf = false),
|
|
@ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY_OPAQUE, name = "DIRTY_OPAQUE"),
|
|
@ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY, name = "DIRTY")
|
|
})
|
|
int mPrivateFlags;
|
|
|
|
/**
|
|
* Count of how many windows this view has been attached to.
|
|
*/
|
|
int mWindowAttachCount;
|
|
|
|
/**
|
|
* Count of how many transparency requests have been made on this view
|
|
*/
|
|
int mTransparentRequests = 0;
|
|
|
|
/**
|
|
* The layout parameters associated with this view and used by the parent
|
|
* {@link android.view.ViewGroup} to determine how this view should be
|
|
* laid out.
|
|
* {@hide}
|
|
*/
|
|
protected ViewGroup.LayoutParams mLayoutParams;
|
|
|
|
/**
|
|
* The view flags hold various views states.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
int mViewFlags;
|
|
|
|
/**
|
|
* The distance in pixels from the left edge of this view's parent
|
|
* to the left edge of this view.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
protected int mLeft;
|
|
/**
|
|
* The distance in pixels from the left edge of this view's parent
|
|
* to the right edge of this view.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
protected int mRight;
|
|
/**
|
|
* The distance in pixels from the top edge of this view's parent
|
|
* to the top edge of this view.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
protected int mTop;
|
|
/**
|
|
* The distance in pixels from the top edge of this view's parent
|
|
* to the bottom edge of this view.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
protected int mBottom;
|
|
|
|
/**
|
|
* The offset, in pixels, by which the content of this view is scrolled
|
|
* horizontally.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "scrolling")
|
|
protected int mScrollX;
|
|
/**
|
|
* The offset, in pixels, by which the content of this view is scrolled
|
|
* vertically.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "scrolling")
|
|
protected int mScrollY;
|
|
|
|
/**
|
|
* The left padding in pixels, that is the distance in pixels between the
|
|
* left edge of this view and the left edge of its content.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
protected int mPaddingLeft;
|
|
/**
|
|
* The right padding in pixels, that is the distance in pixels between the
|
|
* right edge of this view and the right edge of its content.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
protected int mPaddingRight;
|
|
/**
|
|
* The top padding in pixels, that is the distance in pixels between the
|
|
* top edge of this view and the top edge of its content.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
protected int mPaddingTop;
|
|
/**
|
|
* The bottom padding in pixels, that is the distance in pixels between the
|
|
* bottom edge of this view and the bottom edge of its content.
|
|
* {@hide}
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
protected int mPaddingBottom;
|
|
|
|
/**
|
|
* Briefly describes the view and is primarily used for accessibility support.
|
|
*/
|
|
private CharSequence mContentDescription;
|
|
|
|
/**
|
|
* Cache the paddingRight set by the user to append to the scrollbar's size.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
int mUserPaddingRight;
|
|
|
|
/**
|
|
* Cache the paddingBottom set by the user to append to the scrollbar's size.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "padding")
|
|
int mUserPaddingBottom;
|
|
|
|
/**
|
|
* @hide
|
|
*/
|
|
int mOldWidthMeasureSpec = Integer.MIN_VALUE;
|
|
/**
|
|
* @hide
|
|
*/
|
|
int mOldHeightMeasureSpec = Integer.MIN_VALUE;
|
|
|
|
private Resources mResources = null;
|
|
|
|
private Drawable mBGDrawable;
|
|
|
|
private int mBackgroundResource;
|
|
private boolean mBackgroundSizeChanged;
|
|
|
|
/**
|
|
* Listener used to dispatch focus change events.
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected OnFocusChangeListener mOnFocusChangeListener;
|
|
|
|
/**
|
|
* Listener used to dispatch click events.
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected OnClickListener mOnClickListener;
|
|
|
|
/**
|
|
* Listener used to dispatch long click events.
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected OnLongClickListener mOnLongClickListener;
|
|
|
|
/**
|
|
* Listener used to build the context menu.
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected OnCreateContextMenuListener mOnCreateContextMenuListener;
|
|
|
|
private OnKeyListener mOnKeyListener;
|
|
|
|
private OnTouchListener mOnTouchListener;
|
|
|
|
/**
|
|
* The application environment this view lives in.
|
|
* This field should be made private, so it is hidden from the SDK.
|
|
* {@hide}
|
|
*/
|
|
protected Context mContext;
|
|
|
|
private ScrollabilityCache mScrollCache;
|
|
|
|
private int[] mDrawableState = null;
|
|
|
|
private SoftReference<Bitmap> mDrawingCache;
|
|
private SoftReference<Bitmap> mUnscaledDrawingCache;
|
|
|
|
/**
|
|
* When this view has focus and the next focus is {@link #FOCUS_LEFT},
|
|
* the user may specify which view to go to next.
|
|
*/
|
|
private int mNextFocusLeftId = View.NO_ID;
|
|
|
|
/**
|
|
* When this view has focus and the next focus is {@link #FOCUS_RIGHT},
|
|
* the user may specify which view to go to next.
|
|
*/
|
|
private int mNextFocusRightId = View.NO_ID;
|
|
|
|
/**
|
|
* When this view has focus and the next focus is {@link #FOCUS_UP},
|
|
* the user may specify which view to go to next.
|
|
*/
|
|
private int mNextFocusUpId = View.NO_ID;
|
|
|
|
/**
|
|
* When this view has focus and the next focus is {@link #FOCUS_DOWN},
|
|
* the user may specify which view to go to next.
|
|
*/
|
|
private int mNextFocusDownId = View.NO_ID;
|
|
|
|
private CheckForLongPress mPendingCheckForLongPress;
|
|
private CheckForTap mPendingCheckForTap = null;
|
|
private PerformClick mPerformClick;
|
|
|
|
private UnsetPressedState mUnsetPressedState;
|
|
|
|
/**
|
|
* Whether the long press's action has been invoked. The tap's action is invoked on the
|
|
* up event while a long press is invoked as soon as the long press duration is reached, so
|
|
* a long press could be performed before the tap is checked, in which case the tap's action
|
|
* should not be invoked.
|
|
*/
|
|
private boolean mHasPerformedLongPress;
|
|
|
|
/**
|
|
* The minimum height of the view. We'll try our best to have the height
|
|
* of this view to at least this amount.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "measurement")
|
|
private int mMinHeight;
|
|
|
|
/**
|
|
* The minimum width of the view. We'll try our best to have the width
|
|
* of this view to at least this amount.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "measurement")
|
|
private int mMinWidth;
|
|
|
|
/**
|
|
* The delegate to handle touch events that are physically in this view
|
|
* but should be handled by another view.
|
|
*/
|
|
private TouchDelegate mTouchDelegate = null;
|
|
|
|
/**
|
|
* Solid color to use as a background when creating the drawing cache. Enables
|
|
* the cache to use 16 bit bitmaps instead of 32 bit.
|
|
*/
|
|
private int mDrawingCacheBackgroundColor = 0;
|
|
|
|
/**
|
|
* Special tree observer used when mAttachInfo is null.
|
|
*/
|
|
private ViewTreeObserver mFloatingTreeObserver;
|
|
|
|
/**
|
|
* Cache the touch slop from the context that created the view.
|
|
*/
|
|
private int mTouchSlop;
|
|
|
|
// Used for debug only
|
|
static long sInstanceCount = 0;
|
|
|
|
/**
|
|
* Simple constructor to use when creating a view from code.
|
|
*
|
|
* @param context The Context the view is running in, through which it can
|
|
* access the current theme, resources, etc.
|
|
*/
|
|
public View(Context context) {
|
|
mContext = context;
|
|
mResources = context != null ? context.getResources() : null;
|
|
mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED;
|
|
// Used for debug only
|
|
//++sInstanceCount;
|
|
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
|
|
setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS);
|
|
}
|
|
|
|
/**
|
|
* Constructor that is called when inflating a view from XML. This is called
|
|
* when a view is being constructed from an XML file, supplying attributes
|
|
* that were specified in the XML file. This version uses a default style of
|
|
* 0, so the only attribute values applied are those in the Context's Theme
|
|
* and the given AttributeSet.
|
|
*
|
|
* <p>
|
|
* The method onFinishInflate() will be called after all children have been
|
|
* added.
|
|
*
|
|
* @param context The Context the view is running in, through which it can
|
|
* access the current theme, resources, etc.
|
|
* @param attrs The attributes of the XML tag that is inflating the view.
|
|
* @see #View(Context, AttributeSet, int)
|
|
*/
|
|
public View(Context context, AttributeSet attrs) {
|
|
this(context, attrs, 0);
|
|
}
|
|
|
|
/**
|
|
* Perform inflation from XML and apply a class-specific base style. This
|
|
* constructor of View allows subclasses to use their own base style when
|
|
* they are inflating. For example, a Button class's constructor would call
|
|
* this version of the super class constructor and supply
|
|
* <code>R.attr.buttonStyle</code> for <var>defStyle</var>; this allows
|
|
* the theme's button style to modify all of the base view attributes (in
|
|
* particular its background) as well as the Button class's attributes.
|
|
*
|
|
* @param context The Context the view is running in, through which it can
|
|
* access the current theme, resources, etc.
|
|
* @param attrs The attributes of the XML tag that is inflating the view.
|
|
* @param defStyle The default style to apply to this view. If 0, no style
|
|
* will be applied (beyond what is included in the theme). This may
|
|
* either be an attribute resource, whose value will be retrieved
|
|
* from the current theme, or an explicit style resource.
|
|
* @see #View(Context, AttributeSet)
|
|
*/
|
|
public View(Context context, AttributeSet attrs, int defStyle) {
|
|
this(context);
|
|
|
|
TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View,
|
|
defStyle, 0);
|
|
|
|
Drawable background = null;
|
|
|
|
int leftPadding = -1;
|
|
int topPadding = -1;
|
|
int rightPadding = -1;
|
|
int bottomPadding = -1;
|
|
|
|
int padding = -1;
|
|
|
|
int viewFlagValues = 0;
|
|
int viewFlagMasks = 0;
|
|
|
|
boolean setScrollContainer = false;
|
|
|
|
int x = 0;
|
|
int y = 0;
|
|
|
|
int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY;
|
|
|
|
int overScrollMode = mOverScrollMode;
|
|
final int N = a.getIndexCount();
|
|
for (int i = 0; i < N; i++) {
|
|
int attr = a.getIndex(i);
|
|
switch (attr) {
|
|
case com.android.internal.R.styleable.View_background:
|
|
background = a.getDrawable(attr);
|
|
break;
|
|
case com.android.internal.R.styleable.View_padding:
|
|
padding = a.getDimensionPixelSize(attr, -1);
|
|
break;
|
|
case com.android.internal.R.styleable.View_paddingLeft:
|
|
leftPadding = a.getDimensionPixelSize(attr, -1);
|
|
break;
|
|
case com.android.internal.R.styleable.View_paddingTop:
|
|
topPadding = a.getDimensionPixelSize(attr, -1);
|
|
break;
|
|
case com.android.internal.R.styleable.View_paddingRight:
|
|
rightPadding = a.getDimensionPixelSize(attr, -1);
|
|
break;
|
|
case com.android.internal.R.styleable.View_paddingBottom:
|
|
bottomPadding = a.getDimensionPixelSize(attr, -1);
|
|
break;
|
|
case com.android.internal.R.styleable.View_scrollX:
|
|
x = a.getDimensionPixelOffset(attr, 0);
|
|
break;
|
|
case com.android.internal.R.styleable.View_scrollY:
|
|
y = a.getDimensionPixelOffset(attr, 0);
|
|
break;
|
|
case com.android.internal.R.styleable.View_id:
|
|
mID = a.getResourceId(attr, NO_ID);
|
|
break;
|
|
case com.android.internal.R.styleable.View_tag:
|
|
mTag = a.getText(attr);
|
|
break;
|
|
case com.android.internal.R.styleable.View_fitsSystemWindows:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= FITS_SYSTEM_WINDOWS;
|
|
viewFlagMasks |= FITS_SYSTEM_WINDOWS;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_focusable:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= FOCUSABLE;
|
|
viewFlagMasks |= FOCUSABLE_MASK;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_focusableInTouchMode:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE;
|
|
viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_clickable:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= CLICKABLE;
|
|
viewFlagMasks |= CLICKABLE;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_longClickable:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= LONG_CLICKABLE;
|
|
viewFlagMasks |= LONG_CLICKABLE;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_saveEnabled:
|
|
if (!a.getBoolean(attr, true)) {
|
|
viewFlagValues |= SAVE_DISABLED;
|
|
viewFlagMasks |= SAVE_DISABLED_MASK;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_duplicateParentState:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= DUPLICATE_PARENT_STATE;
|
|
viewFlagMasks |= DUPLICATE_PARENT_STATE;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_visibility:
|
|
final int visibility = a.getInt(attr, 0);
|
|
if (visibility != 0) {
|
|
viewFlagValues |= VISIBILITY_FLAGS[visibility];
|
|
viewFlagMasks |= VISIBILITY_MASK;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_drawingCacheQuality:
|
|
final int cacheQuality = a.getInt(attr, 0);
|
|
if (cacheQuality != 0) {
|
|
viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality];
|
|
viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_contentDescription:
|
|
mContentDescription = a.getString(attr);
|
|
break;
|
|
case com.android.internal.R.styleable.View_soundEffectsEnabled:
|
|
if (!a.getBoolean(attr, true)) {
|
|
viewFlagValues &= ~SOUND_EFFECTS_ENABLED;
|
|
viewFlagMasks |= SOUND_EFFECTS_ENABLED;
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_hapticFeedbackEnabled:
|
|
if (!a.getBoolean(attr, true)) {
|
|
viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED;
|
|
viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED;
|
|
}
|
|
break;
|
|
case R.styleable.View_scrollbars:
|
|
final int scrollbars = a.getInt(attr, SCROLLBARS_NONE);
|
|
if (scrollbars != SCROLLBARS_NONE) {
|
|
viewFlagValues |= scrollbars;
|
|
viewFlagMasks |= SCROLLBARS_MASK;
|
|
initializeScrollbars(a);
|
|
}
|
|
break;
|
|
case R.styleable.View_fadingEdge:
|
|
final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE);
|
|
if (fadingEdge != FADING_EDGE_NONE) {
|
|
viewFlagValues |= fadingEdge;
|
|
viewFlagMasks |= FADING_EDGE_MASK;
|
|
initializeFadingEdge(a);
|
|
}
|
|
break;
|
|
case R.styleable.View_scrollbarStyle:
|
|
scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY);
|
|
if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) {
|
|
viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK;
|
|
viewFlagMasks |= SCROLLBARS_STYLE_MASK;
|
|
}
|
|
break;
|
|
case R.styleable.View_isScrollContainer:
|
|
setScrollContainer = true;
|
|
if (a.getBoolean(attr, false)) {
|
|
setScrollContainer(true);
|
|
}
|
|
break;
|
|
case com.android.internal.R.styleable.View_keepScreenOn:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= KEEP_SCREEN_ON;
|
|
viewFlagMasks |= KEEP_SCREEN_ON;
|
|
}
|
|
break;
|
|
case R.styleable.View_filterTouchesWhenObscured:
|
|
if (a.getBoolean(attr, false)) {
|
|
viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED;
|
|
viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED;
|
|
}
|
|
break;
|
|
case R.styleable.View_nextFocusLeft:
|
|
mNextFocusLeftId = a.getResourceId(attr, View.NO_ID);
|
|
break;
|
|
case R.styleable.View_nextFocusRight:
|
|
mNextFocusRightId = a.getResourceId(attr, View.NO_ID);
|
|
break;
|
|
case R.styleable.View_nextFocusUp:
|
|
mNextFocusUpId = a.getResourceId(attr, View.NO_ID);
|
|
break;
|
|
case R.styleable.View_nextFocusDown:
|
|
mNextFocusDownId = a.getResourceId(attr, View.NO_ID);
|
|
break;
|
|
case R.styleable.View_minWidth:
|
|
mMinWidth = a.getDimensionPixelSize(attr, 0);
|
|
break;
|
|
case R.styleable.View_minHeight:
|
|
mMinHeight = a.getDimensionPixelSize(attr, 0);
|
|
break;
|
|
case R.styleable.View_onClick:
|
|
if (context.isRestricted()) {
|
|
throw new IllegalStateException("The android:onClick attribute cannot "
|
|
+ "be used within a restricted context");
|
|
}
|
|
|
|
final String handlerName = a.getString(attr);
|
|
if (handlerName != null) {
|
|
setOnClickListener(new OnClickListener() {
|
|
private Method mHandler;
|
|
|
|
public void onClick(View v) {
|
|
if (mHandler == null) {
|
|
try {
|
|
mHandler = getContext().getClass().getMethod(handlerName,
|
|
View.class);
|
|
} catch (NoSuchMethodException e) {
|
|
int id = getId();
|
|
String idText = id == NO_ID ? "" : " with id '"
|
|
+ getContext().getResources().getResourceEntryName(
|
|
id) + "'";
|
|
throw new IllegalStateException("Could not find a method " +
|
|
handlerName + "(View) in the activity "
|
|
+ getContext().getClass() + " for onClick handler"
|
|
+ " on view " + View.this.getClass() + idText, e);
|
|
}
|
|
}
|
|
|
|
try {
|
|
mHandler.invoke(getContext(), View.this);
|
|
} catch (IllegalAccessException e) {
|
|
throw new IllegalStateException("Could not execute non "
|
|
+ "public method of the activity", e);
|
|
} catch (InvocationTargetException e) {
|
|
throw new IllegalStateException("Could not execute "
|
|
+ "method of the activity", e);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
break;
|
|
case R.styleable.View_overScrollMode:
|
|
overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS);
|
|
break;
|
|
}
|
|
}
|
|
|
|
setOverScrollMode(overScrollMode);
|
|
|
|
if (background != null) {
|
|
setBackgroundDrawable(background);
|
|
}
|
|
|
|
if (padding >= 0) {
|
|
leftPadding = padding;
|
|
topPadding = padding;
|
|
rightPadding = padding;
|
|
bottomPadding = padding;
|
|
}
|
|
|
|
// If the user specified the padding (either with android:padding or
|
|
// android:paddingLeft/Top/Right/Bottom), use this padding, otherwise
|
|
// use the default padding or the padding from the background drawable
|
|
// (stored at this point in mPadding*)
|
|
setPadding(leftPadding >= 0 ? leftPadding : mPaddingLeft,
|
|
topPadding >= 0 ? topPadding : mPaddingTop,
|
|
rightPadding >= 0 ? rightPadding : mPaddingRight,
|
|
bottomPadding >= 0 ? bottomPadding : mPaddingBottom);
|
|
|
|
if (viewFlagMasks != 0) {
|
|
setFlags(viewFlagValues, viewFlagMasks);
|
|
}
|
|
|
|
// Needs to be called after mViewFlags is set
|
|
if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) {
|
|
recomputePadding();
|
|
}
|
|
|
|
if (x != 0 || y != 0) {
|
|
scrollTo(x, y);
|
|
}
|
|
|
|
if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) {
|
|
setScrollContainer(true);
|
|
}
|
|
|
|
computeOpaqueFlags();
|
|
|
|
a.recycle();
|
|
}
|
|
|
|
/**
|
|
* Non-public constructor for use in testing
|
|
*/
|
|
View() {
|
|
}
|
|
|
|
// Used for debug only
|
|
/*
|
|
@Override
|
|
protected void finalize() throws Throwable {
|
|
super.finalize();
|
|
--sInstanceCount;
|
|
}
|
|
*/
|
|
|
|
/**
|
|
* <p>
|
|
* Initializes the fading edges from a given set of styled attributes. This
|
|
* method should be called by subclasses that need fading edges and when an
|
|
* instance of these subclasses is created programmatically rather than
|
|
* being inflated from XML. This method is automatically called when the XML
|
|
* is inflated.
|
|
* </p>
|
|
*
|
|
* @param a the styled attributes set to initialize the fading edges from
|
|
*/
|
|
protected void initializeFadingEdge(TypedArray a) {
|
|
initScrollCache();
|
|
|
|
mScrollCache.fadingEdgeLength = a.getDimensionPixelSize(
|
|
R.styleable.View_fadingEdgeLength,
|
|
ViewConfiguration.get(mContext).getScaledFadingEdgeLength());
|
|
}
|
|
|
|
/**
|
|
* Returns the size of the vertical faded edges used to indicate that more
|
|
* content in this view is visible.
|
|
*
|
|
* @return The size in pixels of the vertical faded edge or 0 if vertical
|
|
* faded edges are not enabled for this view.
|
|
* @attr ref android.R.styleable#View_fadingEdgeLength
|
|
*/
|
|
public int getVerticalFadingEdgeLength() {
|
|
if (isVerticalFadingEdgeEnabled()) {
|
|
ScrollabilityCache cache = mScrollCache;
|
|
if (cache != null) {
|
|
return cache.fadingEdgeLength;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set the size of the faded edge used to indicate that more content in this
|
|
* view is available. Will not change whether the fading edge is enabled; use
|
|
* {@link #setVerticalFadingEdgeEnabled} or {@link #setHorizontalFadingEdgeEnabled}
|
|
* to enable the fading edge for the vertical or horizontal fading edges.
|
|
*
|
|
* @param length The size in pixels of the faded edge used to indicate that more
|
|
* content in this view is visible.
|
|
*/
|
|
public void setFadingEdgeLength(int length) {
|
|
initScrollCache();
|
|
mScrollCache.fadingEdgeLength = length;
|
|
}
|
|
|
|
/**
|
|
* Returns the size of the horizontal faded edges used to indicate that more
|
|
* content in this view is visible.
|
|
*
|
|
* @return The size in pixels of the horizontal faded edge or 0 if horizontal
|
|
* faded edges are not enabled for this view.
|
|
* @attr ref android.R.styleable#View_fadingEdgeLength
|
|
*/
|
|
public int getHorizontalFadingEdgeLength() {
|
|
if (isHorizontalFadingEdgeEnabled()) {
|
|
ScrollabilityCache cache = mScrollCache;
|
|
if (cache != null) {
|
|
return cache.fadingEdgeLength;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the width of the vertical scrollbar.
|
|
*
|
|
* @return The width in pixels of the vertical scrollbar or 0 if there
|
|
* is no vertical scrollbar.
|
|
*/
|
|
public int getVerticalScrollbarWidth() {
|
|
ScrollabilityCache cache = mScrollCache;
|
|
if (cache != null) {
|
|
ScrollBarDrawable scrollBar = cache.scrollBar;
|
|
if (scrollBar != null) {
|
|
int size = scrollBar.getSize(true);
|
|
if (size <= 0) {
|
|
size = cache.scrollBarSize;
|
|
}
|
|
return size;
|
|
}
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the height of the horizontal scrollbar.
|
|
*
|
|
* @return The height in pixels of the horizontal scrollbar or 0 if
|
|
* there is no horizontal scrollbar.
|
|
*/
|
|
protected int getHorizontalScrollbarHeight() {
|
|
ScrollabilityCache cache = mScrollCache;
|
|
if (cache != null) {
|
|
ScrollBarDrawable scrollBar = cache.scrollBar;
|
|
if (scrollBar != null) {
|
|
int size = scrollBar.getSize(false);
|
|
if (size <= 0) {
|
|
size = cache.scrollBarSize;
|
|
}
|
|
return size;
|
|
}
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Initializes the scrollbars from a given set of styled attributes. This
|
|
* method should be called by subclasses that need scrollbars and when an
|
|
* instance of these subclasses is created programmatically rather than
|
|
* being inflated from XML. This method is automatically called when the XML
|
|
* is inflated.
|
|
* </p>
|
|
*
|
|
* @param a the styled attributes set to initialize the scrollbars from
|
|
*/
|
|
protected void initializeScrollbars(TypedArray a) {
|
|
initScrollCache();
|
|
|
|
final ScrollabilityCache scrollabilityCache = mScrollCache;
|
|
|
|
if (scrollabilityCache.scrollBar == null) {
|
|
scrollabilityCache.scrollBar = new ScrollBarDrawable();
|
|
}
|
|
|
|
final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true);
|
|
|
|
if (!fadeScrollbars) {
|
|
scrollabilityCache.state = ScrollabilityCache.ON;
|
|
}
|
|
scrollabilityCache.fadeScrollBars = fadeScrollbars;
|
|
|
|
|
|
scrollabilityCache.scrollBarFadeDuration = a.getInt(
|
|
R.styleable.View_scrollbarFadeDuration, ViewConfiguration
|
|
.getScrollBarFadeDuration());
|
|
scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt(
|
|
R.styleable.View_scrollbarDefaultDelayBeforeFade,
|
|
ViewConfiguration.getScrollDefaultDelay());
|
|
|
|
|
|
scrollabilityCache.scrollBarSize = a.getDimensionPixelSize(
|
|
com.android.internal.R.styleable.View_scrollbarSize,
|
|
ViewConfiguration.get(mContext).getScaledScrollBarSize());
|
|
|
|
Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal);
|
|
scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track);
|
|
|
|
Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal);
|
|
if (thumb != null) {
|
|
scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb);
|
|
}
|
|
|
|
boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack,
|
|
false);
|
|
if (alwaysDraw) {
|
|
scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true);
|
|
}
|
|
|
|
track = a.getDrawable(R.styleable.View_scrollbarTrackVertical);
|
|
scrollabilityCache.scrollBar.setVerticalTrackDrawable(track);
|
|
|
|
thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical);
|
|
if (thumb != null) {
|
|
scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb);
|
|
}
|
|
|
|
alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack,
|
|
false);
|
|
if (alwaysDraw) {
|
|
scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true);
|
|
}
|
|
|
|
// Re-apply user/background padding so that scrollbar(s) get added
|
|
recomputePadding();
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Initalizes the scrollability cache if necessary.
|
|
* </p>
|
|
*/
|
|
private void initScrollCache() {
|
|
if (mScrollCache == null) {
|
|
mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when focus of this view changed.
|
|
*
|
|
* @param l The callback that will run.
|
|
*/
|
|
public void setOnFocusChangeListener(OnFocusChangeListener l) {
|
|
mOnFocusChangeListener = l;
|
|
}
|
|
|
|
/**
|
|
* Returns the focus-change callback registered for this view.
|
|
*
|
|
* @return The callback, or null if one is not registered.
|
|
*/
|
|
public OnFocusChangeListener getOnFocusChangeListener() {
|
|
return mOnFocusChangeListener;
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when this view is clicked. If this view is not
|
|
* clickable, it becomes clickable.
|
|
*
|
|
* @param l The callback that will run
|
|
*
|
|
* @see #setClickable(boolean)
|
|
*/
|
|
public void setOnClickListener(OnClickListener l) {
|
|
if (!isClickable()) {
|
|
setClickable(true);
|
|
}
|
|
mOnClickListener = l;
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when this view is clicked and held. If this view is not
|
|
* long clickable, it becomes long clickable.
|
|
*
|
|
* @param l The callback that will run
|
|
*
|
|
* @see #setLongClickable(boolean)
|
|
*/
|
|
public void setOnLongClickListener(OnLongClickListener l) {
|
|
if (!isLongClickable()) {
|
|
setLongClickable(true);
|
|
}
|
|
mOnLongClickListener = l;
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when the context menu for this view is
|
|
* being built. If this view is not long clickable, it becomes long clickable.
|
|
*
|
|
* @param l The callback that will run
|
|
*
|
|
*/
|
|
public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) {
|
|
if (!isLongClickable()) {
|
|
setLongClickable(true);
|
|
}
|
|
mOnCreateContextMenuListener = l;
|
|
}
|
|
|
|
/**
|
|
* Call this view's OnClickListener, if it is defined.
|
|
*
|
|
* @return True there was an assigned OnClickListener that was called, false
|
|
* otherwise is returned.
|
|
*/
|
|
public boolean performClick() {
|
|
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
|
|
|
|
if (mOnClickListener != null) {
|
|
playSoundEffect(SoundEffectConstants.CLICK);
|
|
mOnClickListener.onClick(this);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the
|
|
* OnLongClickListener did not consume the event.
|
|
*
|
|
* @return True if one of the above receivers consumed the event, false otherwise.
|
|
*/
|
|
public boolean performLongClick() {
|
|
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED);
|
|
|
|
boolean handled = false;
|
|
if (mOnLongClickListener != null) {
|
|
handled = mOnLongClickListener.onLongClick(View.this);
|
|
}
|
|
if (!handled) {
|
|
handled = showContextMenu();
|
|
}
|
|
if (handled) {
|
|
performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
/**
|
|
* Bring up the context menu for this view.
|
|
*
|
|
* @return Whether a context menu was displayed.
|
|
*/
|
|
public boolean showContextMenu() {
|
|
return getParent().showContextMenuForChild(this);
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when a key is pressed in this view.
|
|
* @param l the key listener to attach to this view
|
|
*/
|
|
public void setOnKeyListener(OnKeyListener l) {
|
|
mOnKeyListener = l;
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when a touch event is sent to this view.
|
|
* @param l the touch listener to attach to this view
|
|
*/
|
|
public void setOnTouchListener(OnTouchListener l) {
|
|
mOnTouchListener = l;
|
|
}
|
|
|
|
/**
|
|
* Give this view focus. This will cause {@link #onFocusChanged} to be called.
|
|
*
|
|
* Note: this does not check whether this {@link View} should get focus, it just
|
|
* gives it focus no matter what. It should only be called internally by framework
|
|
* code that knows what it is doing, namely {@link #requestFocus(int, Rect)}.
|
|
*
|
|
* @param direction values are View.FOCUS_UP, View.FOCUS_DOWN,
|
|
* View.FOCUS_LEFT or View.FOCUS_RIGHT. This is the direction which
|
|
* focus moved when requestFocus() is called. It may not always
|
|
* apply, in which case use the default View.FOCUS_DOWN.
|
|
* @param previouslyFocusedRect The rectangle of the view that had focus
|
|
* prior in this View's coordinate system.
|
|
*/
|
|
void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) {
|
|
if (DBG) {
|
|
System.out.println(this + " requestFocus()");
|
|
}
|
|
|
|
if ((mPrivateFlags & FOCUSED) == 0) {
|
|
mPrivateFlags |= FOCUSED;
|
|
|
|
if (mParent != null) {
|
|
mParent.requestChildFocus(this, this);
|
|
}
|
|
|
|
onFocusChanged(true, direction, previouslyFocusedRect);
|
|
refreshDrawableState();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Request that a rectangle of this view be visible on the screen,
|
|
* scrolling if necessary just enough.
|
|
*
|
|
* <p>A View should call this if it maintains some notion of which part
|
|
* of its content is interesting. For example, a text editing view
|
|
* should call this when its cursor moves.
|
|
*
|
|
* @param rectangle The rectangle.
|
|
* @return Whether any parent scrolled.
|
|
*/
|
|
public boolean requestRectangleOnScreen(Rect rectangle) {
|
|
return requestRectangleOnScreen(rectangle, false);
|
|
}
|
|
|
|
/**
|
|
* Request that a rectangle of this view be visible on the screen,
|
|
* scrolling if necessary just enough.
|
|
*
|
|
* <p>A View should call this if it maintains some notion of which part
|
|
* of its content is interesting. For example, a text editing view
|
|
* should call this when its cursor moves.
|
|
*
|
|
* <p>When <code>immediate</code> is set to true, scrolling will not be
|
|
* animated.
|
|
*
|
|
* @param rectangle The rectangle.
|
|
* @param immediate True to forbid animated scrolling, false otherwise
|
|
* @return Whether any parent scrolled.
|
|
*/
|
|
public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) {
|
|
View child = this;
|
|
ViewParent parent = mParent;
|
|
boolean scrolled = false;
|
|
while (parent != null) {
|
|
scrolled |= parent.requestChildRectangleOnScreen(child,
|
|
rectangle, immediate);
|
|
|
|
// offset rect so next call has the rectangle in the
|
|
// coordinate system of its direct child.
|
|
rectangle.offset(child.getLeft(), child.getTop());
|
|
rectangle.offset(-child.getScrollX(), -child.getScrollY());
|
|
|
|
if (!(parent instanceof View)) {
|
|
break;
|
|
}
|
|
|
|
child = (View) parent;
|
|
parent = child.getParent();
|
|
}
|
|
return scrolled;
|
|
}
|
|
|
|
/**
|
|
* Called when this view wants to give up focus. This will cause
|
|
* {@link #onFocusChanged} to be called.
|
|
*/
|
|
public void clearFocus() {
|
|
if (DBG) {
|
|
System.out.println(this + " clearFocus()");
|
|
}
|
|
|
|
if ((mPrivateFlags & FOCUSED) != 0) {
|
|
mPrivateFlags &= ~FOCUSED;
|
|
|
|
if (mParent != null) {
|
|
mParent.clearChildFocus(this);
|
|
}
|
|
|
|
onFocusChanged(false, 0, null);
|
|
refreshDrawableState();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called to clear the focus of a view that is about to be removed.
|
|
* Doesn't call clearChildFocus, which prevents this view from taking
|
|
* focus again before it has been removed from the parent
|
|
*/
|
|
void clearFocusForRemoval() {
|
|
if ((mPrivateFlags & FOCUSED) != 0) {
|
|
mPrivateFlags &= ~FOCUSED;
|
|
|
|
onFocusChanged(false, 0, null);
|
|
refreshDrawableState();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called internally by the view system when a new view is getting focus.
|
|
* This is what clears the old focus.
|
|
*/
|
|
void unFocus() {
|
|
if (DBG) {
|
|
System.out.println(this + " unFocus()");
|
|
}
|
|
|
|
if ((mPrivateFlags & FOCUSED) != 0) {
|
|
mPrivateFlags &= ~FOCUSED;
|
|
|
|
onFocusChanged(false, 0, null);
|
|
refreshDrawableState();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if this view has focus iteself, or is the ancestor of the
|
|
* view that has focus.
|
|
*
|
|
* @return True if this view has or contains focus, false otherwise.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "focus")
|
|
public boolean hasFocus() {
|
|
return (mPrivateFlags & FOCUSED) != 0;
|
|
}
|
|
|
|
/**
|
|
* Returns true if this view is focusable or if it contains a reachable View
|
|
* for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()"
|
|
* is a View whose parents do not block descendants focus.
|
|
*
|
|
* Only {@link #VISIBLE} views are considered focusable.
|
|
*
|
|
* @return True if the view is focusable or if the view contains a focusable
|
|
* View, false otherwise.
|
|
*
|
|
* @see ViewGroup#FOCUS_BLOCK_DESCENDANTS
|
|
*/
|
|
public boolean hasFocusable() {
|
|
return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable();
|
|
}
|
|
|
|
/**
|
|
* Called by the view system when the focus state of this view changes.
|
|
* When the focus change event is caused by directional navigation, direction
|
|
* and previouslyFocusedRect provide insight into where the focus is coming from.
|
|
* When overriding, be sure to call up through to the super class so that
|
|
* the standard focus handling will occur.
|
|
*
|
|
* @param gainFocus True if the View has focus; false otherwise.
|
|
* @param direction The direction focus has moved when requestFocus()
|
|
* is called to give this view focus. Values are
|
|
* {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT} or
|
|
* {@link #FOCUS_RIGHT}. It may not always apply, in which
|
|
* case use the default.
|
|
* @param previouslyFocusedRect The rectangle, in this view's coordinate
|
|
* system, of the previously focused view. If applicable, this will be
|
|
* passed in as finer grained information about where the focus is coming
|
|
* from (in addition to direction). Will be <code>null</code> otherwise.
|
|
*/
|
|
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
|
|
if (gainFocus) {
|
|
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
|
|
}
|
|
|
|
InputMethodManager imm = InputMethodManager.peekInstance();
|
|
if (!gainFocus) {
|
|
if (isPressed()) {
|
|
setPressed(false);
|
|
}
|
|
if (imm != null && mAttachInfo != null
|
|
&& mAttachInfo.mHasWindowFocus) {
|
|
imm.focusOut(this);
|
|
}
|
|
onFocusLost();
|
|
} else if (imm != null && mAttachInfo != null
|
|
&& mAttachInfo.mHasWindowFocus) {
|
|
imm.focusIn(this);
|
|
}
|
|
|
|
invalidate();
|
|
if (mOnFocusChangeListener != null) {
|
|
mOnFocusChangeListener.onFocusChange(this, gainFocus);
|
|
}
|
|
|
|
if (mAttachInfo != null) {
|
|
mAttachInfo.mKeyDispatchState.reset(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public void sendAccessibilityEvent(int eventType) {
|
|
if (AccessibilityManager.getInstance(mContext).isEnabled()) {
|
|
sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public void sendAccessibilityEventUnchecked(AccessibilityEvent event) {
|
|
event.setClassName(getClass().getName());
|
|
event.setPackageName(getContext().getPackageName());
|
|
event.setEnabled(isEnabled());
|
|
event.setContentDescription(mContentDescription);
|
|
|
|
if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED && mAttachInfo != null) {
|
|
ArrayList<View> focusablesTempList = mAttachInfo.mFocusablesTempList;
|
|
getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL);
|
|
event.setItemCount(focusablesTempList.size());
|
|
event.setCurrentItemIndex(focusablesTempList.indexOf(this));
|
|
focusablesTempList.clear();
|
|
}
|
|
|
|
dispatchPopulateAccessibilityEvent(event);
|
|
|
|
AccessibilityManager.getInstance(mContext).sendAccessibilityEvent(event);
|
|
}
|
|
|
|
/**
|
|
* Dispatches an {@link AccessibilityEvent} to the {@link View} children
|
|
* to be populated.
|
|
*
|
|
* @param event The event.
|
|
*
|
|
* @return True if the event population was completed.
|
|
*/
|
|
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Gets the {@link View} description. It briefly describes the view and is
|
|
* primarily used for accessibility support. Set this property to enable
|
|
* better accessibility support for your application. This is especially
|
|
* true for views that do not have textual representation (For example,
|
|
* ImageButton).
|
|
*
|
|
* @return The content descriptiopn.
|
|
*
|
|
* @attr ref android.R.styleable#View_contentDescription
|
|
*/
|
|
public CharSequence getContentDescription() {
|
|
return mContentDescription;
|
|
}
|
|
|
|
/**
|
|
* Sets the {@link View} description. It briefly describes the view and is
|
|
* primarily used for accessibility support. Set this property to enable
|
|
* better accessibility support for your application. This is especially
|
|
* true for views that do not have textual representation (For example,
|
|
* ImageButton).
|
|
*
|
|
* @param contentDescription The content description.
|
|
*
|
|
* @attr ref android.R.styleable#View_contentDescription
|
|
*/
|
|
public void setContentDescription(CharSequence contentDescription) {
|
|
mContentDescription = contentDescription;
|
|
}
|
|
|
|
/**
|
|
* Invoked whenever this view loses focus, either by losing window focus or by losing
|
|
* focus within its window. This method can be used to clear any state tied to the
|
|
* focus. For instance, if a button is held pressed with the trackball and the window
|
|
* loses focus, this method can be used to cancel the press.
|
|
*
|
|
* Subclasses of View overriding this method should always call super.onFocusLost().
|
|
*
|
|
* @see #onFocusChanged(boolean, int, android.graphics.Rect)
|
|
* @see #onWindowFocusChanged(boolean)
|
|
*
|
|
* @hide pending API council approval
|
|
*/
|
|
protected void onFocusLost() {
|
|
resetPressedState();
|
|
}
|
|
|
|
private void resetPressedState() {
|
|
if ((mViewFlags & ENABLED_MASK) == DISABLED) {
|
|
return;
|
|
}
|
|
|
|
if (isPressed()) {
|
|
setPressed(false);
|
|
|
|
if (!mHasPerformedLongPress) {
|
|
removeLongPressCallback();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if this view has focus
|
|
*
|
|
* @return True if this view has focus, false otherwise.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "focus")
|
|
public boolean isFocused() {
|
|
return (mPrivateFlags & FOCUSED) != 0;
|
|
}
|
|
|
|
/**
|
|
* Find the view in the hierarchy rooted at this view that currently has
|
|
* focus.
|
|
*
|
|
* @return The view that currently has focus, or null if no focused view can
|
|
* be found.
|
|
*/
|
|
public View findFocus() {
|
|
return (mPrivateFlags & FOCUSED) != 0 ? this : null;
|
|
}
|
|
|
|
/**
|
|
* Change whether this view is one of the set of scrollable containers in
|
|
* its window. This will be used to determine whether the window can
|
|
* resize or must pan when a soft input area is open -- scrollable
|
|
* containers allow the window to use resize mode since the container
|
|
* will appropriately shrink.
|
|
*/
|
|
public void setScrollContainer(boolean isScrollContainer) {
|
|
if (isScrollContainer) {
|
|
if (mAttachInfo != null && (mPrivateFlags&SCROLL_CONTAINER_ADDED) == 0) {
|
|
mAttachInfo.mScrollContainers.add(this);
|
|
mPrivateFlags |= SCROLL_CONTAINER_ADDED;
|
|
}
|
|
mPrivateFlags |= SCROLL_CONTAINER;
|
|
} else {
|
|
if ((mPrivateFlags&SCROLL_CONTAINER_ADDED) != 0) {
|
|
mAttachInfo.mScrollContainers.remove(this);
|
|
}
|
|
mPrivateFlags &= ~(SCROLL_CONTAINER|SCROLL_CONTAINER_ADDED);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the quality of the drawing cache.
|
|
*
|
|
* @return One of {@link #DRAWING_CACHE_QUALITY_AUTO},
|
|
* {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH}
|
|
*
|
|
* @see #setDrawingCacheQuality(int)
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #isDrawingCacheEnabled()
|
|
*
|
|
* @attr ref android.R.styleable#View_drawingCacheQuality
|
|
*/
|
|
public int getDrawingCacheQuality() {
|
|
return mViewFlags & DRAWING_CACHE_QUALITY_MASK;
|
|
}
|
|
|
|
/**
|
|
* Set the drawing cache quality of this view. This value is used only when the
|
|
* drawing cache is enabled
|
|
*
|
|
* @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO},
|
|
* {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH}
|
|
*
|
|
* @see #getDrawingCacheQuality()
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #isDrawingCacheEnabled()
|
|
*
|
|
* @attr ref android.R.styleable#View_drawingCacheQuality
|
|
*/
|
|
public void setDrawingCacheQuality(int quality) {
|
|
setFlags(quality, DRAWING_CACHE_QUALITY_MASK);
|
|
}
|
|
|
|
/**
|
|
* Returns whether the screen should remain on, corresponding to the current
|
|
* value of {@link #KEEP_SCREEN_ON}.
|
|
*
|
|
* @return Returns true if {@link #KEEP_SCREEN_ON} is set.
|
|
*
|
|
* @see #setKeepScreenOn(boolean)
|
|
*
|
|
* @attr ref android.R.styleable#View_keepScreenOn
|
|
*/
|
|
public boolean getKeepScreenOn() {
|
|
return (mViewFlags & KEEP_SCREEN_ON) != 0;
|
|
}
|
|
|
|
/**
|
|
* Controls whether the screen should remain on, modifying the
|
|
* value of {@link #KEEP_SCREEN_ON}.
|
|
*
|
|
* @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}.
|
|
*
|
|
* @see #getKeepScreenOn()
|
|
*
|
|
* @attr ref android.R.styleable#View_keepScreenOn
|
|
*/
|
|
public void setKeepScreenOn(boolean keepScreenOn) {
|
|
setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON);
|
|
}
|
|
|
|
/**
|
|
* @return The user specified next focus ID.
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusLeft
|
|
*/
|
|
public int getNextFocusLeftId() {
|
|
return mNextFocusLeftId;
|
|
}
|
|
|
|
/**
|
|
* Set the id of the view to use for the next focus
|
|
*
|
|
* @param nextFocusLeftId
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusLeft
|
|
*/
|
|
public void setNextFocusLeftId(int nextFocusLeftId) {
|
|
mNextFocusLeftId = nextFocusLeftId;
|
|
}
|
|
|
|
/**
|
|
* @return The user specified next focus ID.
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusRight
|
|
*/
|
|
public int getNextFocusRightId() {
|
|
return mNextFocusRightId;
|
|
}
|
|
|
|
/**
|
|
* Set the id of the view to use for the next focus
|
|
*
|
|
* @param nextFocusRightId
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusRight
|
|
*/
|
|
public void setNextFocusRightId(int nextFocusRightId) {
|
|
mNextFocusRightId = nextFocusRightId;
|
|
}
|
|
|
|
/**
|
|
* @return The user specified next focus ID.
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusUp
|
|
*/
|
|
public int getNextFocusUpId() {
|
|
return mNextFocusUpId;
|
|
}
|
|
|
|
/**
|
|
* Set the id of the view to use for the next focus
|
|
*
|
|
* @param nextFocusUpId
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusUp
|
|
*/
|
|
public void setNextFocusUpId(int nextFocusUpId) {
|
|
mNextFocusUpId = nextFocusUpId;
|
|
}
|
|
|
|
/**
|
|
* @return The user specified next focus ID.
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusDown
|
|
*/
|
|
public int getNextFocusDownId() {
|
|
return mNextFocusDownId;
|
|
}
|
|
|
|
/**
|
|
* Set the id of the view to use for the next focus
|
|
*
|
|
* @param nextFocusDownId
|
|
*
|
|
* @attr ref android.R.styleable#View_nextFocusDown
|
|
*/
|
|
public void setNextFocusDownId(int nextFocusDownId) {
|
|
mNextFocusDownId = nextFocusDownId;
|
|
}
|
|
|
|
/**
|
|
* Returns the visibility of this view and all of its ancestors
|
|
*
|
|
* @return True if this view and all of its ancestors are {@link #VISIBLE}
|
|
*/
|
|
public boolean isShown() {
|
|
View current = this;
|
|
//noinspection ConstantConditions
|
|
do {
|
|
if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) {
|
|
return false;
|
|
}
|
|
ViewParent parent = current.mParent;
|
|
if (parent == null) {
|
|
return false; // We are not attached to the view root
|
|
}
|
|
if (!(parent instanceof View)) {
|
|
return true;
|
|
}
|
|
current = (View) parent;
|
|
} while (current != null);
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag
|
|
* is set
|
|
*
|
|
* @param insets Insets for system windows
|
|
*
|
|
* @return True if this view applied the insets, false otherwise
|
|
*/
|
|
protected boolean fitSystemWindows(Rect insets) {
|
|
if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) {
|
|
mPaddingLeft = insets.left;
|
|
mPaddingTop = insets.top;
|
|
mPaddingRight = insets.right;
|
|
mPaddingBottom = insets.bottom;
|
|
requestLayout();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Determine if this view has the FITS_SYSTEM_WINDOWS flag set.
|
|
* @return True if window has FITS_SYSTEM_WINDOWS set
|
|
*
|
|
* @hide
|
|
*/
|
|
public boolean isFitsSystemWindowsFlagSet() {
|
|
return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS;
|
|
}
|
|
|
|
/**
|
|
* Returns the visibility status for this view.
|
|
*
|
|
* @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}.
|
|
* @attr ref android.R.styleable#View_visibility
|
|
*/
|
|
@ViewDebug.ExportedProperty(mapping = {
|
|
@ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"),
|
|
@ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"),
|
|
@ViewDebug.IntToString(from = GONE, to = "GONE")
|
|
})
|
|
public int getVisibility() {
|
|
return mViewFlags & VISIBILITY_MASK;
|
|
}
|
|
|
|
/**
|
|
* Set the enabled state of this view.
|
|
*
|
|
* @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}.
|
|
* @attr ref android.R.styleable#View_visibility
|
|
*/
|
|
@RemotableViewMethod
|
|
public void setVisibility(int visibility) {
|
|
setFlags(visibility, VISIBILITY_MASK);
|
|
if (mBGDrawable != null) mBGDrawable.setVisible(visibility == VISIBLE, false);
|
|
}
|
|
|
|
/**
|
|
* Returns the enabled status for this view. The interpretation of the
|
|
* enabled state varies by subclass.
|
|
*
|
|
* @return True if this view is enabled, false otherwise.
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isEnabled() {
|
|
return (mViewFlags & ENABLED_MASK) == ENABLED;
|
|
}
|
|
|
|
/**
|
|
* Set the enabled state of this view. The interpretation of the enabled
|
|
* state varies by subclass.
|
|
*
|
|
* @param enabled True if this view is enabled, false otherwise.
|
|
*/
|
|
@RemotableViewMethod
|
|
public void setEnabled(boolean enabled) {
|
|
if (enabled == isEnabled()) return;
|
|
|
|
setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK);
|
|
|
|
/*
|
|
* The View most likely has to change its appearance, so refresh
|
|
* the drawable state.
|
|
*/
|
|
refreshDrawableState();
|
|
|
|
// Invalidate too, since the default behavior for views is to be
|
|
// be drawn at 50% alpha rather than to change the drawable.
|
|
invalidate();
|
|
}
|
|
|
|
/**
|
|
* Set whether this view can receive the focus.
|
|
*
|
|
* Setting this to false will also ensure that this view is not focusable
|
|
* in touch mode.
|
|
*
|
|
* @param focusable If true, this view can receive the focus.
|
|
*
|
|
* @see #setFocusableInTouchMode(boolean)
|
|
* @attr ref android.R.styleable#View_focusable
|
|
*/
|
|
public void setFocusable(boolean focusable) {
|
|
if (!focusable) {
|
|
setFlags(0, FOCUSABLE_IN_TOUCH_MODE);
|
|
}
|
|
setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK);
|
|
}
|
|
|
|
/**
|
|
* Set whether this view can receive focus while in touch mode.
|
|
*
|
|
* Setting this to true will also ensure that this view is focusable.
|
|
*
|
|
* @param focusableInTouchMode If true, this view can receive the focus while
|
|
* in touch mode.
|
|
*
|
|
* @see #setFocusable(boolean)
|
|
* @attr ref android.R.styleable#View_focusableInTouchMode
|
|
*/
|
|
public void setFocusableInTouchMode(boolean focusableInTouchMode) {
|
|
// Focusable in touch mode should always be set before the focusable flag
|
|
// otherwise, setting the focusable flag will trigger a focusableViewAvailable()
|
|
// which, in touch mode, will not successfully request focus on this view
|
|
// because the focusable in touch mode flag is not set
|
|
setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE);
|
|
if (focusableInTouchMode) {
|
|
setFlags(FOCUSABLE, FOCUSABLE_MASK);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set whether this view should have sound effects enabled for events such as
|
|
* clicking and touching.
|
|
*
|
|
* <p>You may wish to disable sound effects for a view if you already play sounds,
|
|
* for instance, a dial key that plays dtmf tones.
|
|
*
|
|
* @param soundEffectsEnabled whether sound effects are enabled for this view.
|
|
* @see #isSoundEffectsEnabled()
|
|
* @see #playSoundEffect(int)
|
|
* @attr ref android.R.styleable#View_soundEffectsEnabled
|
|
*/
|
|
public void setSoundEffectsEnabled(boolean soundEffectsEnabled) {
|
|
setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED);
|
|
}
|
|
|
|
/**
|
|
* @return whether this view should have sound effects enabled for events such as
|
|
* clicking and touching.
|
|
*
|
|
* @see #setSoundEffectsEnabled(boolean)
|
|
* @see #playSoundEffect(int)
|
|
* @attr ref android.R.styleable#View_soundEffectsEnabled
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isSoundEffectsEnabled() {
|
|
return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED);
|
|
}
|
|
|
|
/**
|
|
* Set whether this view should have haptic feedback for events such as
|
|
* long presses.
|
|
*
|
|
* <p>You may wish to disable haptic feedback if your view already controls
|
|
* its own haptic feedback.
|
|
*
|
|
* @param hapticFeedbackEnabled whether haptic feedback enabled for this view.
|
|
* @see #isHapticFeedbackEnabled()
|
|
* @see #performHapticFeedback(int)
|
|
* @attr ref android.R.styleable#View_hapticFeedbackEnabled
|
|
*/
|
|
public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) {
|
|
setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED);
|
|
}
|
|
|
|
/**
|
|
* @return whether this view should have haptic feedback enabled for events
|
|
* long presses.
|
|
*
|
|
* @see #setHapticFeedbackEnabled(boolean)
|
|
* @see #performHapticFeedback(int)
|
|
* @attr ref android.R.styleable#View_hapticFeedbackEnabled
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isHapticFeedbackEnabled() {
|
|
return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED);
|
|
}
|
|
|
|
/**
|
|
* If this view doesn't do any drawing on its own, set this flag to
|
|
* allow further optimizations. By default, this flag is not set on
|
|
* View, but could be set on some View subclasses such as ViewGroup.
|
|
*
|
|
* Typically, if you override {@link #onDraw} you should clear this flag.
|
|
*
|
|
* @param willNotDraw whether or not this View draw on its own
|
|
*/
|
|
public void setWillNotDraw(boolean willNotDraw) {
|
|
setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK);
|
|
}
|
|
|
|
/**
|
|
* Returns whether or not this View draws on its own.
|
|
*
|
|
* @return true if this view has nothing to draw, false otherwise
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "drawing")
|
|
public boolean willNotDraw() {
|
|
return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW;
|
|
}
|
|
|
|
/**
|
|
* When a View's drawing cache is enabled, drawing is redirected to an
|
|
* offscreen bitmap. Some views, like an ImageView, must be able to
|
|
* bypass this mechanism if they already draw a single bitmap, to avoid
|
|
* unnecessary usage of the memory.
|
|
*
|
|
* @param willNotCacheDrawing true if this view does not cache its
|
|
* drawing, false otherwise
|
|
*/
|
|
public void setWillNotCacheDrawing(boolean willNotCacheDrawing) {
|
|
setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING);
|
|
}
|
|
|
|
/**
|
|
* Returns whether or not this View can cache its drawing or not.
|
|
*
|
|
* @return true if this view does not cache its drawing, false otherwise
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "drawing")
|
|
public boolean willNotCacheDrawing() {
|
|
return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this view reacts to click events or not.
|
|
*
|
|
* @return true if the view is clickable, false otherwise
|
|
*
|
|
* @see #setClickable(boolean)
|
|
* @attr ref android.R.styleable#View_clickable
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isClickable() {
|
|
return (mViewFlags & CLICKABLE) == CLICKABLE;
|
|
}
|
|
|
|
/**
|
|
* Enables or disables click events for this view. When a view
|
|
* is clickable it will change its state to "pressed" on every click.
|
|
* Subclasses should set the view clickable to visually react to
|
|
* user's clicks.
|
|
*
|
|
* @param clickable true to make the view clickable, false otherwise
|
|
*
|
|
* @see #isClickable()
|
|
* @attr ref android.R.styleable#View_clickable
|
|
*/
|
|
public void setClickable(boolean clickable) {
|
|
setFlags(clickable ? CLICKABLE : 0, CLICKABLE);
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this view reacts to long click events or not.
|
|
*
|
|
* @return true if the view is long clickable, false otherwise
|
|
*
|
|
* @see #setLongClickable(boolean)
|
|
* @attr ref android.R.styleable#View_longClickable
|
|
*/
|
|
public boolean isLongClickable() {
|
|
return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE;
|
|
}
|
|
|
|
/**
|
|
* Enables or disables long click events for this view. When a view is long
|
|
* clickable it reacts to the user holding down the button for a longer
|
|
* duration than a tap. This event can either launch the listener or a
|
|
* context menu.
|
|
*
|
|
* @param longClickable true to make the view long clickable, false otherwise
|
|
* @see #isLongClickable()
|
|
* @attr ref android.R.styleable#View_longClickable
|
|
*/
|
|
public void setLongClickable(boolean longClickable) {
|
|
setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE);
|
|
}
|
|
|
|
/**
|
|
* Sets the pressed that for this view.
|
|
*
|
|
* @see #isClickable()
|
|
* @see #setClickable(boolean)
|
|
*
|
|
* @param pressed Pass true to set the View's internal state to "pressed", or false to reverts
|
|
* the View's internal state from a previously set "pressed" state.
|
|
*/
|
|
public void setPressed(boolean pressed) {
|
|
if (pressed) {
|
|
mPrivateFlags |= PRESSED;
|
|
} else {
|
|
mPrivateFlags &= ~PRESSED;
|
|
}
|
|
refreshDrawableState();
|
|
dispatchSetPressed(pressed);
|
|
}
|
|
|
|
/**
|
|
* Dispatch setPressed to all of this View's children.
|
|
*
|
|
* @see #setPressed(boolean)
|
|
*
|
|
* @param pressed The new pressed state
|
|
*/
|
|
protected void dispatchSetPressed(boolean pressed) {
|
|
}
|
|
|
|
/**
|
|
* Indicates whether the view is currently in pressed state. Unless
|
|
* {@link #setPressed(boolean)} is explicitly called, only clickable views can enter
|
|
* the pressed state.
|
|
*
|
|
* @see #setPressed
|
|
* @see #isClickable()
|
|
* @see #setClickable(boolean)
|
|
*
|
|
* @return true if the view is currently pressed, false otherwise
|
|
*/
|
|
public boolean isPressed() {
|
|
return (mPrivateFlags & PRESSED) == PRESSED;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this view will save its state (that is,
|
|
* whether its {@link #onSaveInstanceState} method will be called).
|
|
*
|
|
* @return Returns true if the view state saving is enabled, else false.
|
|
*
|
|
* @see #setSaveEnabled(boolean)
|
|
* @attr ref android.R.styleable#View_saveEnabled
|
|
*/
|
|
public boolean isSaveEnabled() {
|
|
return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED;
|
|
}
|
|
|
|
/**
|
|
* Controls whether the saving of this view's state is
|
|
* enabled (that is, whether its {@link #onSaveInstanceState} method
|
|
* will be called). Note that even if freezing is enabled, the
|
|
* view still must have an id assigned to it (via {@link #setId setId()})
|
|
* for its state to be saved. This flag can only disable the
|
|
* saving of this view; any child views may still have their state saved.
|
|
*
|
|
* @param enabled Set to false to <em>disable</em> state saving, or true
|
|
* (the default) to allow it.
|
|
*
|
|
* @see #isSaveEnabled()
|
|
* @see #setId(int)
|
|
* @see #onSaveInstanceState()
|
|
* @attr ref android.R.styleable#View_saveEnabled
|
|
*/
|
|
public void setSaveEnabled(boolean enabled) {
|
|
setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK);
|
|
}
|
|
|
|
/**
|
|
* Gets whether the framework should discard touches when the view's
|
|
* window is obscured by another visible window.
|
|
* Refer to the {@link View} security documentation for more details.
|
|
*
|
|
* @return True if touch filtering is enabled.
|
|
*
|
|
* @see #setFilterTouchesWhenObscured(boolean)
|
|
* @attr ref android.R.styleable#View_filterTouchesWhenObscured
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean getFilterTouchesWhenObscured() {
|
|
return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0;
|
|
}
|
|
|
|
/**
|
|
* Sets whether the framework should discard touches when the view's
|
|
* window is obscured by another visible window.
|
|
* Refer to the {@link View} security documentation for more details.
|
|
*
|
|
* @param enabled True if touch filtering should be enabled.
|
|
*
|
|
* @see #getFilterTouchesWhenObscured
|
|
* @attr ref android.R.styleable#View_filterTouchesWhenObscured
|
|
*/
|
|
public void setFilterTouchesWhenObscured(boolean enabled) {
|
|
setFlags(enabled ? 0 : FILTER_TOUCHES_WHEN_OBSCURED,
|
|
FILTER_TOUCHES_WHEN_OBSCURED);
|
|
}
|
|
|
|
/**
|
|
* Returns whether this View is able to take focus.
|
|
*
|
|
* @return True if this view can take focus, or false otherwise.
|
|
* @attr ref android.R.styleable#View_focusable
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "focus")
|
|
public final boolean isFocusable() {
|
|
return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK);
|
|
}
|
|
|
|
/**
|
|
* When a view is focusable, it may not want to take focus when in touch mode.
|
|
* For example, a button would like focus when the user is navigating via a D-pad
|
|
* so that the user can click on it, but once the user starts touching the screen,
|
|
* the button shouldn't take focus
|
|
* @return Whether the view is focusable in touch mode.
|
|
* @attr ref android.R.styleable#View_focusableInTouchMode
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public final boolean isFocusableInTouchMode() {
|
|
return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE);
|
|
}
|
|
|
|
/**
|
|
* Find the nearest view in the specified direction that can take focus.
|
|
* This does not actually give focus to that view.
|
|
*
|
|
* @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
|
|
*
|
|
* @return The nearest focusable in the specified direction, or null if none
|
|
* can be found.
|
|
*/
|
|
public View focusSearch(int direction) {
|
|
if (mParent != null) {
|
|
return mParent.focusSearch(this, direction);
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method is the last chance for the focused view and its ancestors to
|
|
* respond to an arrow key. This is called when the focused view did not
|
|
* consume the key internally, nor could the view system find a new view in
|
|
* the requested direction to give focus to.
|
|
*
|
|
* @param focused The currently focused view.
|
|
* @param direction The direction focus wants to move. One of FOCUS_UP,
|
|
* FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT.
|
|
* @return True if the this view consumed this unhandled move.
|
|
*/
|
|
public boolean dispatchUnhandledMove(View focused, int direction) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* If a user manually specified the next view id for a particular direction,
|
|
* use the root to look up the view. Once a view is found, it is cached
|
|
* for future lookups.
|
|
* @param root The root view of the hierarchy containing this view.
|
|
* @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
|
|
* @return The user specified next view, or null if there is none.
|
|
*/
|
|
View findUserSetNextFocus(View root, int direction) {
|
|
switch (direction) {
|
|
case FOCUS_LEFT:
|
|
if (mNextFocusLeftId == View.NO_ID) return null;
|
|
return findViewShouldExist(root, mNextFocusLeftId);
|
|
case FOCUS_RIGHT:
|
|
if (mNextFocusRightId == View.NO_ID) return null;
|
|
return findViewShouldExist(root, mNextFocusRightId);
|
|
case FOCUS_UP:
|
|
if (mNextFocusUpId == View.NO_ID) return null;
|
|
return findViewShouldExist(root, mNextFocusUpId);
|
|
case FOCUS_DOWN:
|
|
if (mNextFocusDownId == View.NO_ID) return null;
|
|
return findViewShouldExist(root, mNextFocusDownId);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
private static View findViewShouldExist(View root, int childViewId) {
|
|
View result = root.findViewById(childViewId);
|
|
if (result == null) {
|
|
Log.w(VIEW_LOG_TAG, "couldn't find next focus view specified "
|
|
+ "by user for id " + childViewId);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Find and return all focusable views that are descendants of this view,
|
|
* possibly including this view if it is focusable itself.
|
|
*
|
|
* @param direction The direction of the focus
|
|
* @return A list of focusable views
|
|
*/
|
|
public ArrayList<View> getFocusables(int direction) {
|
|
ArrayList<View> result = new ArrayList<View>(24);
|
|
addFocusables(result, direction);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Add any focusable views that are descendants of this view (possibly
|
|
* including this view if it is focusable itself) to views. If we are in touch mode,
|
|
* only add views that are also focusable in touch mode.
|
|
*
|
|
* @param views Focusable views found so far
|
|
* @param direction The direction of the focus
|
|
*/
|
|
public void addFocusables(ArrayList<View> views, int direction) {
|
|
addFocusables(views, direction, FOCUSABLES_TOUCH_MODE);
|
|
}
|
|
|
|
/**
|
|
* Adds any focusable views that are descendants of this view (possibly
|
|
* including this view if it is focusable itself) to views. This method
|
|
* adds all focusable views regardless if we are in touch mode or
|
|
* only views focusable in touch mode if we are in touch mode depending on
|
|
* the focusable mode paramater.
|
|
*
|
|
* @param views Focusable views found so far or null if all we are interested is
|
|
* the number of focusables.
|
|
* @param direction The direction of the focus.
|
|
* @param focusableMode The type of focusables to be added.
|
|
*
|
|
* @see #FOCUSABLES_ALL
|
|
* @see #FOCUSABLES_TOUCH_MODE
|
|
*/
|
|
public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
|
|
if (!isFocusable()) {
|
|
return;
|
|
}
|
|
|
|
if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE &&
|
|
isInTouchMode() && !isFocusableInTouchMode()) {
|
|
return;
|
|
}
|
|
|
|
if (views != null) {
|
|
views.add(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Find and return all touchable views that are descendants of this view,
|
|
* possibly including this view if it is touchable itself.
|
|
*
|
|
* @return A list of touchable views
|
|
*/
|
|
public ArrayList<View> getTouchables() {
|
|
ArrayList<View> result = new ArrayList<View>();
|
|
addTouchables(result);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Add any touchable views that are descendants of this view (possibly
|
|
* including this view if it is touchable itself) to views.
|
|
*
|
|
* @param views Touchable views found so far
|
|
*/
|
|
public void addTouchables(ArrayList<View> views) {
|
|
final int viewFlags = mViewFlags;
|
|
|
|
if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)
|
|
&& (viewFlags & ENABLED_MASK) == ENABLED) {
|
|
views.add(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Call this to try to give focus to a specific view or to one of its
|
|
* descendants.
|
|
*
|
|
* A view will not actually take focus if it is not focusable ({@link #isFocusable} returns false),
|
|
* or if it is focusable and it is not focusable in touch mode ({@link #isFocusableInTouchMode})
|
|
* while the device is in touch mode.
|
|
*
|
|
* See also {@link #focusSearch}, which is what you call to say that you
|
|
* have focus, and you want your parent to look for the next one.
|
|
*
|
|
* This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments
|
|
* {@link #FOCUS_DOWN} and <code>null</code>.
|
|
*
|
|
* @return Whether this view or one of its descendants actually took focus.
|
|
*/
|
|
public final boolean requestFocus() {
|
|
return requestFocus(View.FOCUS_DOWN);
|
|
}
|
|
|
|
|
|
/**
|
|
* Call this to try to give focus to a specific view or to one of its
|
|
* descendants and give it a hint about what direction focus is heading.
|
|
*
|
|
* A view will not actually take focus if it is not focusable ({@link #isFocusable} returns false),
|
|
* or if it is focusable and it is not focusable in touch mode ({@link #isFocusableInTouchMode})
|
|
* while the device is in touch mode.
|
|
*
|
|
* See also {@link #focusSearch}, which is what you call to say that you
|
|
* have focus, and you want your parent to look for the next one.
|
|
*
|
|
* This is equivalent to calling {@link #requestFocus(int, Rect)} with
|
|
* <code>null</code> set for the previously focused rectangle.
|
|
*
|
|
* @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
|
|
* @return Whether this view or one of its descendants actually took focus.
|
|
*/
|
|
public final boolean requestFocus(int direction) {
|
|
return requestFocus(direction, null);
|
|
}
|
|
|
|
/**
|
|
* Call this to try to give focus to a specific view or to one of its descendants
|
|
* and give it hints about the direction and a specific rectangle that the focus
|
|
* is coming from. The rectangle can help give larger views a finer grained hint
|
|
* about where focus is coming from, and therefore, where to show selection, or
|
|
* forward focus change internally.
|
|
*
|
|
* A view will not actually take focus if it is not focusable ({@link #isFocusable} returns false),
|
|
* or if it is focusable and it is not focusable in touch mode ({@link #isFocusableInTouchMode})
|
|
* while the device is in touch mode.
|
|
*
|
|
* A View will not take focus if it is not visible.
|
|
*
|
|
* A View will not take focus if one of its parents has {@link android.view.ViewGroup#getDescendantFocusability()}
|
|
* equal to {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}.
|
|
*
|
|
* See also {@link #focusSearch}, which is what you call to say that you
|
|
* have focus, and you want your parent to look for the next one.
|
|
*
|
|
* You may wish to override this method if your custom {@link View} has an internal
|
|
* {@link View} that it wishes to forward the request to.
|
|
*
|
|
* @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT
|
|
* @param previouslyFocusedRect The rectangle (in this View's coordinate system)
|
|
* to give a finer grained hint about where focus is coming from. May be null
|
|
* if there is no hint.
|
|
* @return Whether this view or one of its descendants actually took focus.
|
|
*/
|
|
public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
|
|
// need to be focusable
|
|
if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE ||
|
|
(mViewFlags & VISIBILITY_MASK) != VISIBLE) {
|
|
return false;
|
|
}
|
|
|
|
// need to be focusable in touch mode if in touch mode
|
|
if (isInTouchMode() &&
|
|
(FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) {
|
|
return false;
|
|
}
|
|
|
|
// need to not have any parents blocking us
|
|
if (hasAncestorThatBlocksDescendantFocus()) {
|
|
return false;
|
|
}
|
|
|
|
handleFocusGainInternal(direction, previouslyFocusedRect);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Call this to try to give focus to a specific view or to one of its descendants. This is a
|
|
* special variant of {@link #requestFocus() } that will allow views that are not focuable in
|
|
* touch mode to request focus when they are touched.
|
|
*
|
|
* @return Whether this view or one of its descendants actually took focus.
|
|
*
|
|
* @see #isInTouchMode()
|
|
*
|
|
*/
|
|
public final boolean requestFocusFromTouch() {
|
|
// Leave touch mode if we need to
|
|
if (isInTouchMode()) {
|
|
View root = getRootView();
|
|
if (root != null) {
|
|
ViewRoot viewRoot = (ViewRoot)root.getParent();
|
|
if (viewRoot != null) {
|
|
viewRoot.ensureTouchMode(false);
|
|
}
|
|
}
|
|
}
|
|
return requestFocus(View.FOCUS_DOWN);
|
|
}
|
|
|
|
/**
|
|
* @return Whether any ancestor of this view blocks descendant focus.
|
|
*/
|
|
private boolean hasAncestorThatBlocksDescendantFocus() {
|
|
ViewParent ancestor = mParent;
|
|
while (ancestor instanceof ViewGroup) {
|
|
final ViewGroup vgAncestor = (ViewGroup) ancestor;
|
|
if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS) {
|
|
return true;
|
|
} else {
|
|
ancestor = vgAncestor.getParent();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @hide
|
|
*/
|
|
public void dispatchStartTemporaryDetach() {
|
|
onStartTemporaryDetach();
|
|
}
|
|
|
|
/**
|
|
* This is called when a container is going to temporarily detach a child, with
|
|
* {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}.
|
|
* It will either be followed by {@link #onFinishTemporaryDetach()} or
|
|
* {@link #onDetachedFromWindow()} when the container is done.
|
|
*/
|
|
public void onStartTemporaryDetach() {
|
|
removeUnsetPressCallback();
|
|
mPrivateFlags |= CANCEL_NEXT_UP_EVENT;
|
|
}
|
|
|
|
/**
|
|
* @hide
|
|
*/
|
|
public void dispatchFinishTemporaryDetach() {
|
|
onFinishTemporaryDetach();
|
|
}
|
|
|
|
/**
|
|
* Called after {@link #onStartTemporaryDetach} when the container is done
|
|
* changing the view.
|
|
*/
|
|
public void onFinishTemporaryDetach() {
|
|
}
|
|
|
|
/**
|
|
* capture information of this view for later analysis: developement only
|
|
* check dynamic switch to make sure we only dump view
|
|
* when ViewDebug.SYSTEM_PROPERTY_CAPTURE_VIEW) is set
|
|
*/
|
|
private static void captureViewInfo(String subTag, View v) {
|
|
if (v == null || SystemProperties.getInt(ViewDebug.SYSTEM_PROPERTY_CAPTURE_VIEW, 0) == 0) {
|
|
return;
|
|
}
|
|
ViewDebug.dumpCapturedView(subTag, v);
|
|
}
|
|
|
|
/**
|
|
* Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState}
|
|
* for this view's window. Returns null if the view is not currently attached
|
|
* to the window. Normally you will not need to use this directly, but
|
|
* just use the standard high-level event callbacks like {@link #onKeyDown}.
|
|
*/
|
|
public KeyEvent.DispatcherState getKeyDispatcherState() {
|
|
return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null;
|
|
}
|
|
|
|
/**
|
|
* Dispatch a key event before it is processed by any input method
|
|
* associated with the view hierarchy. This can be used to intercept
|
|
* key events in special situations before the IME consumes them; a
|
|
* typical example would be handling the BACK key to update the application's
|
|
* UI instead of allowing the IME to see it and close itself.
|
|
*
|
|
* @param event The key event to be dispatched.
|
|
* @return True if the event was handled, false otherwise.
|
|
*/
|
|
public boolean dispatchKeyEventPreIme(KeyEvent event) {
|
|
return onKeyPreIme(event.getKeyCode(), event);
|
|
}
|
|
|
|
/**
|
|
* Dispatch a key event to the next view on the focus path. This path runs
|
|
* from the top of the view tree down to the currently focused view. If this
|
|
* view has focus, it will dispatch to itself. Otherwise it will dispatch
|
|
* the next node down the focus path. This method also fires any key
|
|
* listeners.
|
|
*
|
|
* @param event The key event to be dispatched.
|
|
* @return True if the event was handled, false otherwise.
|
|
*/
|
|
public boolean dispatchKeyEvent(KeyEvent event) {
|
|
// If any attached key listener a first crack at the event.
|
|
//noinspection SimplifiableIfStatement
|
|
|
|
if (android.util.Config.LOGV) {
|
|
captureViewInfo("captureViewKeyEvent", this);
|
|
}
|
|
|
|
if (mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED
|
|
&& mOnKeyListener.onKey(this, event.getKeyCode(), event)) {
|
|
return true;
|
|
}
|
|
|
|
return event.dispatch(this, mAttachInfo != null
|
|
? mAttachInfo.mKeyDispatchState : null, this);
|
|
}
|
|
|
|
/**
|
|
* Dispatches a key shortcut event.
|
|
*
|
|
* @param event The key event to be dispatched.
|
|
* @return True if the event was handled by the view, false otherwise.
|
|
*/
|
|
public boolean dispatchKeyShortcutEvent(KeyEvent event) {
|
|
return onKeyShortcut(event.getKeyCode(), event);
|
|
}
|
|
|
|
/**
|
|
* Pass the touch screen motion event down to the target view, or this
|
|
* view if it is the target.
|
|
*
|
|
* @param event The motion event to be dispatched.
|
|
* @return True if the event was handled by the view, false otherwise.
|
|
*/
|
|
public boolean dispatchTouchEvent(MotionEvent event) {
|
|
if (!onFilterTouchEventForSecurity(event)) {
|
|
return false;
|
|
}
|
|
|
|
if (mOnTouchListener != null && (mViewFlags & ENABLED_MASK) == ENABLED &&
|
|
mOnTouchListener.onTouch(this, event)) {
|
|
return true;
|
|
}
|
|
return onTouchEvent(event);
|
|
}
|
|
|
|
/**
|
|
* Filter the touch event to apply security policies.
|
|
*
|
|
* @param event The motion event to be filtered.
|
|
* @return True if the event should be dispatched, false if the event should be dropped.
|
|
*
|
|
* @see #getFilterTouchesWhenObscured
|
|
*/
|
|
public boolean onFilterTouchEventForSecurity(MotionEvent event) {
|
|
if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0
|
|
&& (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) {
|
|
// Window is obscured, drop this touch.
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Pass a trackball motion event down to the focused view.
|
|
*
|
|
* @param event The motion event to be dispatched.
|
|
* @return True if the event was handled by the view, false otherwise.
|
|
*/
|
|
public boolean dispatchTrackballEvent(MotionEvent event) {
|
|
//Log.i("view", "view=" + this + ", " + event.toString());
|
|
return onTrackballEvent(event);
|
|
}
|
|
|
|
/**
|
|
* Called when the window containing this view gains or loses window focus.
|
|
* ViewGroups should override to route to their children.
|
|
*
|
|
* @param hasFocus True if the window containing this view now has focus,
|
|
* false otherwise.
|
|
*/
|
|
public void dispatchWindowFocusChanged(boolean hasFocus) {
|
|
onWindowFocusChanged(hasFocus);
|
|
}
|
|
|
|
/**
|
|
* Called when the window containing this view gains or loses focus. Note
|
|
* that this is separate from view focus: to receive key events, both
|
|
* your view and its window must have focus. If a window is displayed
|
|
* on top of yours that takes input focus, then your own window will lose
|
|
* focus but the view focus will remain unchanged.
|
|
*
|
|
* @param hasWindowFocus True if the window containing this view now has
|
|
* focus, false otherwise.
|
|
*/
|
|
public void onWindowFocusChanged(boolean hasWindowFocus) {
|
|
InputMethodManager imm = InputMethodManager.peekInstance();
|
|
if (!hasWindowFocus) {
|
|
if (isPressed()) {
|
|
setPressed(false);
|
|
}
|
|
if (imm != null && (mPrivateFlags & FOCUSED) != 0) {
|
|
imm.focusOut(this);
|
|
}
|
|
removeLongPressCallback();
|
|
onFocusLost();
|
|
} else if (imm != null && (mPrivateFlags & FOCUSED) != 0) {
|
|
imm.focusIn(this);
|
|
}
|
|
refreshDrawableState();
|
|
}
|
|
|
|
/**
|
|
* Returns true if this view is in a window that currently has window focus.
|
|
* Note that this is not the same as the view itself having focus.
|
|
*
|
|
* @return True if this view is in a window that currently has window focus.
|
|
*/
|
|
public boolean hasWindowFocus() {
|
|
return mAttachInfo != null && mAttachInfo.mHasWindowFocus;
|
|
}
|
|
|
|
/**
|
|
* Dispatch a view visibility change down the view hierarchy.
|
|
* ViewGroups should override to route to their children.
|
|
* @param changedView The view whose visibility changed. Could be 'this' or
|
|
* an ancestor view.
|
|
* @param visibility The new visibility of changedView: {@link #VISIBLE},
|
|
* {@link #INVISIBLE} or {@link #GONE}.
|
|
*/
|
|
protected void dispatchVisibilityChanged(View changedView, int visibility) {
|
|
onVisibilityChanged(changedView, visibility);
|
|
}
|
|
|
|
/**
|
|
* Called when the visibility of the view or an ancestor of the view is changed.
|
|
* @param changedView The view whose visibility changed. Could be 'this' or
|
|
* an ancestor view.
|
|
* @param visibility The new visibility of changedView: {@link #VISIBLE},
|
|
* {@link #INVISIBLE} or {@link #GONE}.
|
|
*/
|
|
protected void onVisibilityChanged(View changedView, int visibility) {
|
|
if (visibility == VISIBLE) {
|
|
if (mAttachInfo != null) {
|
|
initialAwakenScrollBars();
|
|
} else {
|
|
mPrivateFlags |= AWAKEN_SCROLL_BARS_ON_ATTACH;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Dispatch a hint about whether this view is displayed. For instance, when
|
|
* a View moves out of the screen, it might receives a display hint indicating
|
|
* the view is not displayed. Applications should not <em>rely</em> on this hint
|
|
* as there is no guarantee that they will receive one.
|
|
*
|
|
* @param hint A hint about whether or not this view is displayed:
|
|
* {@link #VISIBLE} or {@link #INVISIBLE}.
|
|
*/
|
|
public void dispatchDisplayHint(int hint) {
|
|
onDisplayHint(hint);
|
|
}
|
|
|
|
/**
|
|
* Gives this view a hint about whether is displayed or not. For instance, when
|
|
* a View moves out of the screen, it might receives a display hint indicating
|
|
* the view is not displayed. Applications should not <em>rely</em> on this hint
|
|
* as there is no guarantee that they will receive one.
|
|
*
|
|
* @param hint A hint about whether or not this view is displayed:
|
|
* {@link #VISIBLE} or {@link #INVISIBLE}.
|
|
*/
|
|
protected void onDisplayHint(int hint) {
|
|
}
|
|
|
|
/**
|
|
* Dispatch a window visibility change down the view hierarchy.
|
|
* ViewGroups should override to route to their children.
|
|
*
|
|
* @param visibility The new visibility of the window.
|
|
*
|
|
* @see #onWindowVisibilityChanged
|
|
*/
|
|
public void dispatchWindowVisibilityChanged(int visibility) {
|
|
onWindowVisibilityChanged(visibility);
|
|
}
|
|
|
|
/**
|
|
* Called when the window containing has change its visibility
|
|
* (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note
|
|
* that this tells you whether or not your window is being made visible
|
|
* to the window manager; this does <em>not</em> tell you whether or not
|
|
* your window is obscured by other windows on the screen, even if it
|
|
* is itself visible.
|
|
*
|
|
* @param visibility The new visibility of the window.
|
|
*/
|
|
protected void onWindowVisibilityChanged(int visibility) {
|
|
if (visibility == VISIBLE) {
|
|
initialAwakenScrollBars();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the current visibility of the window this view is attached to
|
|
* (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}).
|
|
*
|
|
* @return Returns the current visibility of the view's window.
|
|
*/
|
|
public int getWindowVisibility() {
|
|
return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the overall visible display size in which the window this view is
|
|
* attached to has been positioned in. This takes into account screen
|
|
* decorations above the window, for both cases where the window itself
|
|
* is being position inside of them or the window is being placed under
|
|
* then and covered insets are used for the window to position its content
|
|
* inside. In effect, this tells you the available area where content can
|
|
* be placed and remain visible to users.
|
|
*
|
|
* <p>This function requires an IPC back to the window manager to retrieve
|
|
* the requested information, so should not be used in performance critical
|
|
* code like drawing.
|
|
*
|
|
* @param outRect Filled in with the visible display frame. If the view
|
|
* is not attached to a window, this is simply the raw display size.
|
|
*/
|
|
public void getWindowVisibleDisplayFrame(Rect outRect) {
|
|
if (mAttachInfo != null) {
|
|
try {
|
|
mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect);
|
|
} catch (RemoteException e) {
|
|
return;
|
|
}
|
|
// XXX This is really broken, and probably all needs to be done
|
|
// in the window manager, and we need to know more about whether
|
|
// we want the area behind or in front of the IME.
|
|
final Rect insets = mAttachInfo.mVisibleInsets;
|
|
outRect.left += insets.left;
|
|
outRect.top += insets.top;
|
|
outRect.right -= insets.right;
|
|
outRect.bottom -= insets.bottom;
|
|
return;
|
|
}
|
|
Display d = WindowManagerImpl.getDefault().getDefaultDisplay();
|
|
outRect.set(0, 0, d.getWidth(), d.getHeight());
|
|
}
|
|
|
|
/**
|
|
* Dispatch a notification about a resource configuration change down
|
|
* the view hierarchy.
|
|
* ViewGroups should override to route to their children.
|
|
*
|
|
* @param newConfig The new resource configuration.
|
|
*
|
|
* @see #onConfigurationChanged
|
|
*/
|
|
public void dispatchConfigurationChanged(Configuration newConfig) {
|
|
onConfigurationChanged(newConfig);
|
|
}
|
|
|
|
/**
|
|
* Called when the current configuration of the resources being used
|
|
* by the application have changed. You can use this to decide when
|
|
* to reload resources that can changed based on orientation and other
|
|
* configuration characterstics. You only need to use this if you are
|
|
* not relying on the normal {@link android.app.Activity} mechanism of
|
|
* recreating the activity instance upon a configuration change.
|
|
*
|
|
* @param newConfig The new resource configuration.
|
|
*/
|
|
protected void onConfigurationChanged(Configuration newConfig) {
|
|
}
|
|
|
|
/**
|
|
* Private function to aggregate all per-view attributes in to the view
|
|
* root.
|
|
*/
|
|
void dispatchCollectViewAttributes(int visibility) {
|
|
performCollectViewAttributes(visibility);
|
|
}
|
|
|
|
void performCollectViewAttributes(int visibility) {
|
|
//noinspection PointlessBitwiseExpression
|
|
if (((visibility | mViewFlags) & (VISIBILITY_MASK | KEEP_SCREEN_ON))
|
|
== (VISIBLE | KEEP_SCREEN_ON)) {
|
|
mAttachInfo.mKeepScreenOn = true;
|
|
}
|
|
}
|
|
|
|
void needGlobalAttributesUpdate(boolean force) {
|
|
AttachInfo ai = mAttachInfo;
|
|
if (ai != null) {
|
|
if (ai.mKeepScreenOn || force) {
|
|
ai.mRecomputeGlobalAttributes = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns whether the device is currently in touch mode. Touch mode is entered
|
|
* once the user begins interacting with the device by touch, and affects various
|
|
* things like whether focus is always visible to the user.
|
|
*
|
|
* @return Whether the device is in touch mode.
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isInTouchMode() {
|
|
if (mAttachInfo != null) {
|
|
return mAttachInfo.mInTouchMode;
|
|
} else {
|
|
return ViewRoot.isInTouchMode();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the context the view is running in, through which it can
|
|
* access the current theme, resources, etc.
|
|
*
|
|
* @return The view's Context.
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public final Context getContext() {
|
|
return mContext;
|
|
}
|
|
|
|
/**
|
|
* Handle a key event before it is processed by any input method
|
|
* associated with the view hierarchy. This can be used to intercept
|
|
* key events in special situations before the IME consumes them; a
|
|
* typical example would be handling the BACK key to update the application's
|
|
* UI instead of allowing the IME to see it and close itself.
|
|
*
|
|
* @param keyCode The value in event.getKeyCode().
|
|
* @param event Description of the key event.
|
|
* @return If you handled the event, return true. If you want to allow the
|
|
* event to be handled by the next receiver, return false.
|
|
*/
|
|
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent)
|
|
* KeyEvent.Callback.onKeyMultiple()}: perform press of the view
|
|
* when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER}
|
|
* is released, if the view is enabled and clickable.
|
|
*
|
|
* @param keyCode A key code that represents the button pressed, from
|
|
* {@link android.view.KeyEvent}.
|
|
* @param event The KeyEvent object that defines the button action.
|
|
*/
|
|
public boolean onKeyDown(int keyCode, KeyEvent event) {
|
|
boolean result = false;
|
|
|
|
switch (keyCode) {
|
|
case KeyEvent.KEYCODE_DPAD_CENTER:
|
|
case KeyEvent.KEYCODE_ENTER: {
|
|
if ((mViewFlags & ENABLED_MASK) == DISABLED) {
|
|
return true;
|
|
}
|
|
// Long clickable items don't necessarily have to be clickable
|
|
if (((mViewFlags & CLICKABLE) == CLICKABLE ||
|
|
(mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) &&
|
|
(event.getRepeatCount() == 0)) {
|
|
setPressed(true);
|
|
if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) {
|
|
postCheckForLongClick(0);
|
|
}
|
|
return true;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent)
|
|
* KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle
|
|
* the event).
|
|
*/
|
|
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent)
|
|
* KeyEvent.Callback.onKeyMultiple()}: perform clicking of the view
|
|
* when {@link KeyEvent#KEYCODE_DPAD_CENTER} or
|
|
* {@link KeyEvent#KEYCODE_ENTER} is released.
|
|
*
|
|
* @param keyCode A key code that represents the button pressed, from
|
|
* {@link android.view.KeyEvent}.
|
|
* @param event The KeyEvent object that defines the button action.
|
|
*/
|
|
public boolean onKeyUp(int keyCode, KeyEvent event) {
|
|
boolean result = false;
|
|
|
|
switch (keyCode) {
|
|
case KeyEvent.KEYCODE_DPAD_CENTER:
|
|
case KeyEvent.KEYCODE_ENTER: {
|
|
if ((mViewFlags & ENABLED_MASK) == DISABLED) {
|
|
return true;
|
|
}
|
|
if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) {
|
|
setPressed(false);
|
|
|
|
if (!mHasPerformedLongPress) {
|
|
// This is a tap, so remove the longpress check
|
|
removeLongPressCallback();
|
|
|
|
result = performClick();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent)
|
|
* KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle
|
|
* the event).
|
|
*
|
|
* @param keyCode A key code that represents the button pressed, from
|
|
* {@link android.view.KeyEvent}.
|
|
* @param repeatCount The number of times the action was made.
|
|
* @param event The KeyEvent object that defines the button action.
|
|
*/
|
|
public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Called when an unhandled key shortcut event occurs.
|
|
*
|
|
* @param keyCode The value in event.getKeyCode().
|
|
* @param event Description of the key event.
|
|
* @return If you handled the event, return true. If you want to allow the
|
|
* event to be handled by the next receiver, return false.
|
|
*/
|
|
public boolean onKeyShortcut(int keyCode, KeyEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check whether the called view is a text editor, in which case it
|
|
* would make sense to automatically display a soft input window for
|
|
* it. Subclasses should override this if they implement
|
|
* {@link #onCreateInputConnection(EditorInfo)} to return true if
|
|
* a call on that method would return a non-null InputConnection, and
|
|
* they are really a first-class editor that the user would normally
|
|
* start typing on when the go into a window containing your view.
|
|
*
|
|
* <p>The default implementation always returns false. This does
|
|
* <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)}
|
|
* will not be called or the user can not otherwise perform edits on your
|
|
* view; it is just a hint to the system that this is not the primary
|
|
* purpose of this view.
|
|
*
|
|
* @return Returns true if this view is a text editor, else false.
|
|
*/
|
|
public boolean onCheckIsTextEditor() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Create a new InputConnection for an InputMethod to interact
|
|
* with the view. The default implementation returns null, since it doesn't
|
|
* support input methods. You can override this to implement such support.
|
|
* This is only needed for views that take focus and text input.
|
|
*
|
|
* <p>When implementing this, you probably also want to implement
|
|
* {@link #onCheckIsTextEditor()} to indicate you will return a
|
|
* non-null InputConnection.
|
|
*
|
|
* @param outAttrs Fill in with attribute information about the connection.
|
|
*/
|
|
public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Called by the {@link android.view.inputmethod.InputMethodManager}
|
|
* when a view who is not the current
|
|
* input connection target is trying to make a call on the manager. The
|
|
* default implementation returns false; you can override this to return
|
|
* true for certain views if you are performing InputConnection proxying
|
|
* to them.
|
|
* @param view The View that is making the InputMethodManager call.
|
|
* @return Return true to allow the call, false to reject.
|
|
*/
|
|
public boolean checkInputConnectionProxy(View view) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Show the context menu for this view. It is not safe to hold on to the
|
|
* menu after returning from this method.
|
|
*
|
|
* You should normally not overload this method. Overload
|
|
* {@link #onCreateContextMenu(ContextMenu)} or define an
|
|
* {@link OnCreateContextMenuListener} to add items to the context menu.
|
|
*
|
|
* @param menu The context menu to populate
|
|
*/
|
|
public void createContextMenu(ContextMenu menu) {
|
|
ContextMenuInfo menuInfo = getContextMenuInfo();
|
|
|
|
// Sets the current menu info so all items added to menu will have
|
|
// my extra info set.
|
|
((MenuBuilder)menu).setCurrentMenuInfo(menuInfo);
|
|
|
|
onCreateContextMenu(menu);
|
|
if (mOnCreateContextMenuListener != null) {
|
|
mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo);
|
|
}
|
|
|
|
// Clear the extra information so subsequent items that aren't mine don't
|
|
// have my extra info.
|
|
((MenuBuilder)menu).setCurrentMenuInfo(null);
|
|
|
|
if (mParent != null) {
|
|
mParent.createContextMenu(menu);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Views should implement this if they have extra information to associate
|
|
* with the context menu. The return result is supplied as a parameter to
|
|
* the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)}
|
|
* callback.
|
|
*
|
|
* @return Extra information about the item for which the context menu
|
|
* should be shown. This information will vary across different
|
|
* subclasses of View.
|
|
*/
|
|
protected ContextMenuInfo getContextMenuInfo() {
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Views should implement this if the view itself is going to add items to
|
|
* the context menu.
|
|
*
|
|
* @param menu the context menu to populate
|
|
*/
|
|
protected void onCreateContextMenu(ContextMenu menu) {
|
|
}
|
|
|
|
/**
|
|
* Implement this method to handle trackball motion events. The
|
|
* <em>relative</em> movement of the trackball since the last event
|
|
* can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and
|
|
* {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so
|
|
* that a movement of 1 corresponds to the user pressing one DPAD key (so
|
|
* they will often be fractional values, representing the more fine-grained
|
|
* movement information available from a trackball).
|
|
*
|
|
* @param event The motion event.
|
|
* @return True if the event was handled, false otherwise.
|
|
*/
|
|
public boolean onTrackballEvent(MotionEvent event) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Implement this method to handle touch screen motion events.
|
|
*
|
|
* @param event The motion event.
|
|
* @return True if the event was handled, false otherwise.
|
|
*/
|
|
public boolean onTouchEvent(MotionEvent event) {
|
|
final int viewFlags = mViewFlags;
|
|
|
|
if ((viewFlags & ENABLED_MASK) == DISABLED) {
|
|
// A disabled view that is clickable still consumes the touch
|
|
// events, it just doesn't respond to them.
|
|
return (((viewFlags & CLICKABLE) == CLICKABLE ||
|
|
(viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE));
|
|
}
|
|
|
|
if (mTouchDelegate != null) {
|
|
if (mTouchDelegate.onTouchEvent(event)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (((viewFlags & CLICKABLE) == CLICKABLE ||
|
|
(viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) {
|
|
switch (event.getAction()) {
|
|
case MotionEvent.ACTION_UP:
|
|
boolean prepressed = (mPrivateFlags & PREPRESSED) != 0;
|
|
if ((mPrivateFlags & PRESSED) != 0 || prepressed) {
|
|
// take focus if we don't have it already and we should in
|
|
// touch mode.
|
|
boolean focusTaken = false;
|
|
if (isFocusable() && isFocusableInTouchMode() && !isFocused()) {
|
|
focusTaken = requestFocus();
|
|
}
|
|
|
|
if (!mHasPerformedLongPress) {
|
|
// This is a tap, so remove the longpress check
|
|
removeLongPressCallback();
|
|
|
|
// Only perform take click actions if we were in the pressed state
|
|
if (!focusTaken) {
|
|
// Use a Runnable and post this rather than calling
|
|
// performClick directly. This lets other visual state
|
|
// of the view update before click actions start.
|
|
if (mPerformClick == null) {
|
|
mPerformClick = new PerformClick();
|
|
}
|
|
if (!post(mPerformClick)) {
|
|
performClick();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mUnsetPressedState == null) {
|
|
mUnsetPressedState = new UnsetPressedState();
|
|
}
|
|
|
|
if (prepressed) {
|
|
mPrivateFlags |= PRESSED;
|
|
refreshDrawableState();
|
|
postDelayed(mUnsetPressedState,
|
|
ViewConfiguration.getPressedStateDuration());
|
|
} else if (!post(mUnsetPressedState)) {
|
|
// If the post failed, unpress right now
|
|
mUnsetPressedState.run();
|
|
}
|
|
removeTapCallback();
|
|
}
|
|
break;
|
|
|
|
case MotionEvent.ACTION_DOWN:
|
|
if (mPendingCheckForTap == null) {
|
|
mPendingCheckForTap = new CheckForTap();
|
|
}
|
|
mPrivateFlags |= PREPRESSED;
|
|
mHasPerformedLongPress = false;
|
|
postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout());
|
|
break;
|
|
|
|
case MotionEvent.ACTION_CANCEL:
|
|
mPrivateFlags &= ~PRESSED;
|
|
refreshDrawableState();
|
|
removeTapCallback();
|
|
break;
|
|
|
|
case MotionEvent.ACTION_MOVE:
|
|
final int x = (int) event.getX();
|
|
final int y = (int) event.getY();
|
|
|
|
// Be lenient about moving outside of buttons
|
|
int slop = mTouchSlop;
|
|
if ((x < 0 - slop) || (x >= getWidth() + slop) ||
|
|
(y < 0 - slop) || (y >= getHeight() + slop)) {
|
|
// Outside button
|
|
removeTapCallback();
|
|
if ((mPrivateFlags & PRESSED) != 0) {
|
|
// Remove any future long press/tap checks
|
|
removeLongPressCallback();
|
|
|
|
// Need to switch from pressed to not pressed
|
|
mPrivateFlags &= ~PRESSED;
|
|
refreshDrawableState();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Remove the longpress detection timer.
|
|
*/
|
|
private void removeLongPressCallback() {
|
|
if (mPendingCheckForLongPress != null) {
|
|
removeCallbacks(mPendingCheckForLongPress);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the prepress detection timer.
|
|
*/
|
|
private void removeUnsetPressCallback() {
|
|
if ((mPrivateFlags & PRESSED) != 0 && mUnsetPressedState != null) {
|
|
setPressed(false);
|
|
removeCallbacks(mUnsetPressedState);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the tap detection timer.
|
|
*/
|
|
private void removeTapCallback() {
|
|
if (mPendingCheckForTap != null) {
|
|
mPrivateFlags &= ~PREPRESSED;
|
|
removeCallbacks(mPendingCheckForTap);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cancels a pending long press. Your subclass can use this if you
|
|
* want the context menu to come up if the user presses and holds
|
|
* at the same place, but you don't want it to come up if they press
|
|
* and then move around enough to cause scrolling.
|
|
*/
|
|
public void cancelLongPress() {
|
|
removeLongPressCallback();
|
|
|
|
/*
|
|
* The prepressed state handled by the tap callback is a display
|
|
* construct, but the tap callback will post a long press callback
|
|
* less its own timeout. Remove it here.
|
|
*/
|
|
removeTapCallback();
|
|
}
|
|
|
|
/**
|
|
* Sets the TouchDelegate for this View.
|
|
*/
|
|
public void setTouchDelegate(TouchDelegate delegate) {
|
|
mTouchDelegate = delegate;
|
|
}
|
|
|
|
/**
|
|
* Gets the TouchDelegate for this View.
|
|
*/
|
|
public TouchDelegate getTouchDelegate() {
|
|
return mTouchDelegate;
|
|
}
|
|
|
|
/**
|
|
* Set flags controlling behavior of this view.
|
|
*
|
|
* @param flags Constant indicating the value which should be set
|
|
* @param mask Constant indicating the bit range that should be changed
|
|
*/
|
|
void setFlags(int flags, int mask) {
|
|
int old = mViewFlags;
|
|
mViewFlags = (mViewFlags & ~mask) | (flags & mask);
|
|
|
|
int changed = mViewFlags ^ old;
|
|
if (changed == 0) {
|
|
return;
|
|
}
|
|
int privateFlags = mPrivateFlags;
|
|
|
|
/* Check if the FOCUSABLE bit has changed */
|
|
if (((changed & FOCUSABLE_MASK) != 0) &&
|
|
((privateFlags & HAS_BOUNDS) !=0)) {
|
|
if (((old & FOCUSABLE_MASK) == FOCUSABLE)
|
|
&& ((privateFlags & FOCUSED) != 0)) {
|
|
/* Give up focus if we are no longer focusable */
|
|
clearFocus();
|
|
} else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE)
|
|
&& ((privateFlags & FOCUSED) == 0)) {
|
|
/*
|
|
* Tell the view system that we are now available to take focus
|
|
* if no one else already has it.
|
|
*/
|
|
if (mParent != null) mParent.focusableViewAvailable(this);
|
|
}
|
|
}
|
|
|
|
if ((flags & VISIBILITY_MASK) == VISIBLE) {
|
|
if ((changed & VISIBILITY_MASK) != 0) {
|
|
/*
|
|
* If this view is becoming visible, set the DRAWN flag so that
|
|
* the next invalidate() will not be skipped.
|
|
*/
|
|
mPrivateFlags |= DRAWN;
|
|
|
|
needGlobalAttributesUpdate(true);
|
|
|
|
// a view becoming visible is worth notifying the parent
|
|
// about in case nothing has focus. even if this specific view
|
|
// isn't focusable, it may contain something that is, so let
|
|
// the root view try to give this focus if nothing else does.
|
|
if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) {
|
|
mParent.focusableViewAvailable(this);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Check if the GONE bit has changed */
|
|
if ((changed & GONE) != 0) {
|
|
needGlobalAttributesUpdate(false);
|
|
requestLayout();
|
|
invalidate();
|
|
|
|
if (((mViewFlags & VISIBILITY_MASK) == GONE)) {
|
|
if (hasFocus()) clearFocus();
|
|
destroyDrawingCache();
|
|
}
|
|
if (mAttachInfo != null) {
|
|
mAttachInfo.mViewVisibilityChanged = true;
|
|
}
|
|
}
|
|
|
|
/* Check if the VISIBLE bit has changed */
|
|
if ((changed & INVISIBLE) != 0) {
|
|
needGlobalAttributesUpdate(false);
|
|
invalidate();
|
|
|
|
if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE) && hasFocus()) {
|
|
// root view becoming invisible shouldn't clear focus
|
|
if (getRootView() != this) {
|
|
clearFocus();
|
|
}
|
|
}
|
|
if (mAttachInfo != null) {
|
|
mAttachInfo.mViewVisibilityChanged = true;
|
|
}
|
|
}
|
|
|
|
if ((changed & VISIBILITY_MASK) != 0) {
|
|
dispatchVisibilityChanged(this, (flags & VISIBILITY_MASK));
|
|
}
|
|
|
|
if ((changed & WILL_NOT_CACHE_DRAWING) != 0) {
|
|
destroyDrawingCache();
|
|
}
|
|
|
|
if ((changed & DRAWING_CACHE_ENABLED) != 0) {
|
|
destroyDrawingCache();
|
|
mPrivateFlags &= ~DRAWING_CACHE_VALID;
|
|
}
|
|
|
|
if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) {
|
|
destroyDrawingCache();
|
|
mPrivateFlags &= ~DRAWING_CACHE_VALID;
|
|
}
|
|
|
|
if ((changed & DRAW_MASK) != 0) {
|
|
if ((mViewFlags & WILL_NOT_DRAW) != 0) {
|
|
if (mBGDrawable != null) {
|
|
mPrivateFlags &= ~SKIP_DRAW;
|
|
mPrivateFlags |= ONLY_DRAWS_BACKGROUND;
|
|
} else {
|
|
mPrivateFlags |= SKIP_DRAW;
|
|
}
|
|
} else {
|
|
mPrivateFlags &= ~SKIP_DRAW;
|
|
}
|
|
requestLayout();
|
|
invalidate();
|
|
}
|
|
|
|
if ((changed & KEEP_SCREEN_ON) != 0) {
|
|
if (mParent != null) {
|
|
mParent.recomputeViewAttributes(this);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Change the view's z order in the tree, so it's on top of other sibling
|
|
* views
|
|
*/
|
|
public void bringToFront() {
|
|
if (mParent != null) {
|
|
mParent.bringChildToFront(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is called in response to an internal scroll in this view (i.e., the
|
|
* view scrolled its own contents). This is typically as a result of
|
|
* {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been
|
|
* called.
|
|
*
|
|
* @param l Current horizontal scroll origin.
|
|
* @param t Current vertical scroll origin.
|
|
* @param oldl Previous horizontal scroll origin.
|
|
* @param oldt Previous vertical scroll origin.
|
|
*/
|
|
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
|
|
mBackgroundSizeChanged = true;
|
|
|
|
final AttachInfo ai = mAttachInfo;
|
|
if (ai != null) {
|
|
ai.mViewScrollChanged = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is called during layout when the size of this view has changed. If
|
|
* you were just added to the view hierarchy, you're called with the old
|
|
* values of 0.
|
|
*
|
|
* @param w Current width of this view.
|
|
* @param h Current height of this view.
|
|
* @param oldw Old width of this view.
|
|
* @param oldh Old height of this view.
|
|
*/
|
|
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
|
|
}
|
|
|
|
/**
|
|
* Called by draw to draw the child views. This may be overridden
|
|
* by derived classes to gain control just before its children are drawn
|
|
* (but after its own view has been drawn).
|
|
* @param canvas the canvas on which to draw the view
|
|
*/
|
|
protected void dispatchDraw(Canvas canvas) {
|
|
}
|
|
|
|
/**
|
|
* Gets the parent of this view. Note that the parent is a
|
|
* ViewParent and not necessarily a View.
|
|
*
|
|
* @return Parent of this view.
|
|
*/
|
|
public final ViewParent getParent() {
|
|
return mParent;
|
|
}
|
|
|
|
/**
|
|
* Return the scrolled left position of this view. This is the left edge of
|
|
* the displayed part of your view. You do not need to draw any pixels
|
|
* farther left, since those are outside of the frame of your view on
|
|
* screen.
|
|
*
|
|
* @return The left edge of the displayed part of your view, in pixels.
|
|
*/
|
|
public final int getScrollX() {
|
|
return mScrollX;
|
|
}
|
|
|
|
/**
|
|
* Return the scrolled top position of this view. This is the top edge of
|
|
* the displayed part of your view. You do not need to draw any pixels above
|
|
* it, since those are outside of the frame of your view on screen.
|
|
*
|
|
* @return The top edge of the displayed part of your view, in pixels.
|
|
*/
|
|
public final int getScrollY() {
|
|
return mScrollY;
|
|
}
|
|
|
|
/**
|
|
* Return the width of the your view.
|
|
*
|
|
* @return The width of your view, in pixels.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
public final int getWidth() {
|
|
return mRight - mLeft;
|
|
}
|
|
|
|
/**
|
|
* Return the height of your view.
|
|
*
|
|
* @return The height of your view, in pixels.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
public final int getHeight() {
|
|
return mBottom - mTop;
|
|
}
|
|
|
|
/**
|
|
* Return the visible drawing bounds of your view. Fills in the output
|
|
* rectangle with the values from getScrollX(), getScrollY(),
|
|
* getWidth(), and getHeight().
|
|
*
|
|
* @param outRect The (scrolled) drawing bounds of the view.
|
|
*/
|
|
public void getDrawingRect(Rect outRect) {
|
|
outRect.left = mScrollX;
|
|
outRect.top = mScrollY;
|
|
outRect.right = mScrollX + (mRight - mLeft);
|
|
outRect.bottom = mScrollY + (mBottom - mTop);
|
|
}
|
|
|
|
/**
|
|
* The width of this view as measured in the most recent call to measure().
|
|
* This should be used during measurement and layout calculations only. Use
|
|
* {@link #getWidth()} to see how wide a view is after layout.
|
|
*
|
|
* @return The measured width of this view.
|
|
*/
|
|
public final int getMeasuredWidth() {
|
|
return mMeasuredWidth;
|
|
}
|
|
|
|
/**
|
|
* The height of this view as measured in the most recent call to measure().
|
|
* This should be used during measurement and layout calculations only. Use
|
|
* {@link #getHeight()} to see how tall a view is after layout.
|
|
*
|
|
* @return The measured height of this view.
|
|
*/
|
|
public final int getMeasuredHeight() {
|
|
return mMeasuredHeight;
|
|
}
|
|
|
|
/**
|
|
* Top position of this view relative to its parent.
|
|
*
|
|
* @return The top of this view, in pixels.
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public final int getTop() {
|
|
return mTop;
|
|
}
|
|
|
|
/**
|
|
* Bottom position of this view relative to its parent.
|
|
*
|
|
* @return The bottom of this view, in pixels.
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public final int getBottom() {
|
|
return mBottom;
|
|
}
|
|
|
|
/**
|
|
* Left position of this view relative to its parent.
|
|
*
|
|
* @return The left edge of this view, in pixels.
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public final int getLeft() {
|
|
return mLeft;
|
|
}
|
|
|
|
/**
|
|
* Right position of this view relative to its parent.
|
|
*
|
|
* @return The right edge of this view, in pixels.
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public final int getRight() {
|
|
return mRight;
|
|
}
|
|
|
|
/**
|
|
* Hit rectangle in parent's coordinates
|
|
*
|
|
* @param outRect The hit rectangle of the view.
|
|
*/
|
|
public void getHitRect(Rect outRect) {
|
|
outRect.set(mLeft, mTop, mRight, mBottom);
|
|
}
|
|
|
|
/**
|
|
* When a view has focus and the user navigates away from it, the next view is searched for
|
|
* starting from the rectangle filled in by this method.
|
|
*
|
|
* By default, the rectange is the {@link #getDrawingRect})of the view. However, if your
|
|
* view maintains some idea of internal selection, such as a cursor, or a selected row
|
|
* or column, you should override this method and fill in a more specific rectangle.
|
|
*
|
|
* @param r The rectangle to fill in, in this view's coordinates.
|
|
*/
|
|
public void getFocusedRect(Rect r) {
|
|
getDrawingRect(r);
|
|
}
|
|
|
|
/**
|
|
* If some part of this view is not clipped by any of its parents, then
|
|
* return that area in r in global (root) coordinates. To convert r to local
|
|
* coordinates, offset it by -globalOffset (e.g. r.offset(-globalOffset.x,
|
|
* -globalOffset.y)) If the view is completely clipped or translated out,
|
|
* return false.
|
|
*
|
|
* @param r If true is returned, r holds the global coordinates of the
|
|
* visible portion of this view.
|
|
* @param globalOffset If true is returned, globalOffset holds the dx,dy
|
|
* between this view and its root. globalOffet may be null.
|
|
* @return true if r is non-empty (i.e. part of the view is visible at the
|
|
* root level.
|
|
*/
|
|
public boolean getGlobalVisibleRect(Rect r, Point globalOffset) {
|
|
int width = mRight - mLeft;
|
|
int height = mBottom - mTop;
|
|
if (width > 0 && height > 0) {
|
|
r.set(0, 0, width, height);
|
|
if (globalOffset != null) {
|
|
globalOffset.set(-mScrollX, -mScrollY);
|
|
}
|
|
return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public final boolean getGlobalVisibleRect(Rect r) {
|
|
return getGlobalVisibleRect(r, null);
|
|
}
|
|
|
|
public final boolean getLocalVisibleRect(Rect r) {
|
|
Point offset = new Point();
|
|
if (getGlobalVisibleRect(r, offset)) {
|
|
r.offset(-offset.x, -offset.y); // make r local
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Offset this view's vertical location by the specified number of pixels.
|
|
*
|
|
* @param offset the number of pixels to offset the view by
|
|
*/
|
|
public void offsetTopAndBottom(int offset) {
|
|
mTop += offset;
|
|
mBottom += offset;
|
|
}
|
|
|
|
/**
|
|
* Offset this view's horizontal location by the specified amount of pixels.
|
|
*
|
|
* @param offset the numer of pixels to offset the view by
|
|
*/
|
|
public void offsetLeftAndRight(int offset) {
|
|
mLeft += offset;
|
|
mRight += offset;
|
|
}
|
|
|
|
/**
|
|
* Get the LayoutParams associated with this view. All views should have
|
|
* layout parameters. These supply parameters to the <i>parent</i> of this
|
|
* view specifying how it should be arranged. There are many subclasses of
|
|
* ViewGroup.LayoutParams, and these correspond to the different subclasses
|
|
* of ViewGroup that are responsible for arranging their children.
|
|
* @return The LayoutParams associated with this view
|
|
*/
|
|
@ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_")
|
|
public ViewGroup.LayoutParams getLayoutParams() {
|
|
return mLayoutParams;
|
|
}
|
|
|
|
/**
|
|
* Set the layout parameters associated with this view. These supply
|
|
* parameters to the <i>parent</i> of this view specifying how it should be
|
|
* arranged. There are many subclasses of ViewGroup.LayoutParams, and these
|
|
* correspond to the different subclasses of ViewGroup that are responsible
|
|
* for arranging their children.
|
|
*
|
|
* @param params the layout parameters for this view
|
|
*/
|
|
public void setLayoutParams(ViewGroup.LayoutParams params) {
|
|
if (params == null) {
|
|
throw new NullPointerException("params == null");
|
|
}
|
|
mLayoutParams = params;
|
|
requestLayout();
|
|
}
|
|
|
|
/**
|
|
* Set the scrolled position of your view. This will cause a call to
|
|
* {@link #onScrollChanged(int, int, int, int)} and the view will be
|
|
* invalidated.
|
|
* @param x the x position to scroll to
|
|
* @param y the y position to scroll to
|
|
*/
|
|
public void scrollTo(int x, int y) {
|
|
if (mScrollX != x || mScrollY != y) {
|
|
int oldX = mScrollX;
|
|
int oldY = mScrollY;
|
|
mScrollX = x;
|
|
mScrollY = y;
|
|
onScrollChanged(mScrollX, mScrollY, oldX, oldY);
|
|
if (!awakenScrollBars()) {
|
|
invalidate();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move the scrolled position of your view. This will cause a call to
|
|
* {@link #onScrollChanged(int, int, int, int)} and the view will be
|
|
* invalidated.
|
|
* @param x the amount of pixels to scroll by horizontally
|
|
* @param y the amount of pixels to scroll by vertically
|
|
*/
|
|
public void scrollBy(int x, int y) {
|
|
scrollTo(mScrollX + x, mScrollY + y);
|
|
}
|
|
|
|
/**
|
|
* <p>Trigger the scrollbars to draw. When invoked this method starts an
|
|
* animation to fade the scrollbars out after a default delay. If a subclass
|
|
* provides animated scrolling, the start delay should equal the duration
|
|
* of the scrolling animation.</p>
|
|
*
|
|
* <p>The animation starts only if at least one of the scrollbars is
|
|
* enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and
|
|
* {@link #isVerticalScrollBarEnabled()}. When the animation is started,
|
|
* this method returns true, and false otherwise. If the animation is
|
|
* started, this method calls {@link #invalidate()}; in that case the
|
|
* caller should not call {@link #invalidate()}.</p>
|
|
*
|
|
* <p>This method should be invoked every time a subclass directly updates
|
|
* the scroll parameters.</p>
|
|
*
|
|
* <p>This method is automatically invoked by {@link #scrollBy(int, int)}
|
|
* and {@link #scrollTo(int, int)}.</p>
|
|
*
|
|
* @return true if the animation is played, false otherwise
|
|
*
|
|
* @see #awakenScrollBars(int)
|
|
* @see #scrollBy(int, int)
|
|
* @see #scrollTo(int, int)
|
|
* @see #isHorizontalScrollBarEnabled()
|
|
* @see #isVerticalScrollBarEnabled()
|
|
* @see #setHorizontalScrollBarEnabled(boolean)
|
|
* @see #setVerticalScrollBarEnabled(boolean)
|
|
*/
|
|
protected boolean awakenScrollBars() {
|
|
return mScrollCache != null &&
|
|
awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true);
|
|
}
|
|
|
|
/**
|
|
* Trigger the scrollbars to draw.
|
|
* This method differs from awakenScrollBars() only in its default duration.
|
|
* initialAwakenScrollBars() will show the scroll bars for longer than
|
|
* usual to give the user more of a chance to notice them.
|
|
*
|
|
* @return true if the animation is played, false otherwise.
|
|
*/
|
|
private boolean initialAwakenScrollBars() {
|
|
return mScrollCache != null &&
|
|
awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Trigger the scrollbars to draw. When invoked this method starts an
|
|
* animation to fade the scrollbars out after a fixed delay. If a subclass
|
|
* provides animated scrolling, the start delay should equal the duration of
|
|
* the scrolling animation.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* The animation starts only if at least one of the scrollbars is enabled,
|
|
* as specified by {@link #isHorizontalScrollBarEnabled()} and
|
|
* {@link #isVerticalScrollBarEnabled()}. When the animation is started,
|
|
* this method returns true, and false otherwise. If the animation is
|
|
* started, this method calls {@link #invalidate()}; in that case the caller
|
|
* should not call {@link #invalidate()}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* This method should be invoked everytime a subclass directly updates the
|
|
* scroll parameters.
|
|
* </p>
|
|
*
|
|
* @param startDelay the delay, in milliseconds, after which the animation
|
|
* should start; when the delay is 0, the animation starts
|
|
* immediately
|
|
* @return true if the animation is played, false otherwise
|
|
*
|
|
* @see #scrollBy(int, int)
|
|
* @see #scrollTo(int, int)
|
|
* @see #isHorizontalScrollBarEnabled()
|
|
* @see #isVerticalScrollBarEnabled()
|
|
* @see #setHorizontalScrollBarEnabled(boolean)
|
|
* @see #setVerticalScrollBarEnabled(boolean)
|
|
*/
|
|
protected boolean awakenScrollBars(int startDelay) {
|
|
return awakenScrollBars(startDelay, true);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Trigger the scrollbars to draw. When invoked this method starts an
|
|
* animation to fade the scrollbars out after a fixed delay. If a subclass
|
|
* provides animated scrolling, the start delay should equal the duration of
|
|
* the scrolling animation.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* The animation starts only if at least one of the scrollbars is enabled,
|
|
* as specified by {@link #isHorizontalScrollBarEnabled()} and
|
|
* {@link #isVerticalScrollBarEnabled()}. When the animation is started,
|
|
* this method returns true, and false otherwise. If the animation is
|
|
* started, this method calls {@link #invalidate()} if the invalidate parameter
|
|
* is set to true; in that case the caller
|
|
* should not call {@link #invalidate()}.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* This method should be invoked everytime a subclass directly updates the
|
|
* scroll parameters.
|
|
* </p>
|
|
*
|
|
* @param startDelay the delay, in milliseconds, after which the animation
|
|
* should start; when the delay is 0, the animation starts
|
|
* immediately
|
|
*
|
|
* @param invalidate Wheter this method should call invalidate
|
|
*
|
|
* @return true if the animation is played, false otherwise
|
|
*
|
|
* @see #scrollBy(int, int)
|
|
* @see #scrollTo(int, int)
|
|
* @see #isHorizontalScrollBarEnabled()
|
|
* @see #isVerticalScrollBarEnabled()
|
|
* @see #setHorizontalScrollBarEnabled(boolean)
|
|
* @see #setVerticalScrollBarEnabled(boolean)
|
|
*/
|
|
protected boolean awakenScrollBars(int startDelay, boolean invalidate) {
|
|
final ScrollabilityCache scrollCache = mScrollCache;
|
|
|
|
if (scrollCache == null || !scrollCache.fadeScrollBars) {
|
|
return false;
|
|
}
|
|
|
|
if (scrollCache.scrollBar == null) {
|
|
scrollCache.scrollBar = new ScrollBarDrawable();
|
|
}
|
|
|
|
if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) {
|
|
|
|
if (invalidate) {
|
|
// Invalidate to show the scrollbars
|
|
invalidate();
|
|
}
|
|
|
|
if (scrollCache.state == ScrollabilityCache.OFF) {
|
|
// FIXME: this is copied from WindowManagerService.
|
|
// We should get this value from the system when it
|
|
// is possible to do so.
|
|
final int KEY_REPEAT_FIRST_DELAY = 750;
|
|
startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay);
|
|
}
|
|
|
|
// Tell mScrollCache when we should start fading. This may
|
|
// extend the fade start time if one was already scheduled
|
|
long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay;
|
|
scrollCache.fadeStartTime = fadeStartTime;
|
|
scrollCache.state = ScrollabilityCache.ON;
|
|
|
|
// Schedule our fader to run, unscheduling any old ones first
|
|
if (mAttachInfo != null) {
|
|
mAttachInfo.mHandler.removeCallbacks(scrollCache);
|
|
mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Mark the the area defined by dirty as needing to be drawn. If the view is
|
|
* visible, {@link #onDraw} will be called at some point in the future.
|
|
* This must be called from a UI thread. To call from a non-UI thread, call
|
|
* {@link #postInvalidate()}.
|
|
*
|
|
* WARNING: This method is destructive to dirty.
|
|
* @param dirty the rectangle representing the bounds of the dirty region
|
|
*/
|
|
public void invalidate(Rect dirty) {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE);
|
|
}
|
|
|
|
if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS)) {
|
|
mPrivateFlags &= ~DRAWING_CACHE_VALID;
|
|
final ViewParent p = mParent;
|
|
final AttachInfo ai = mAttachInfo;
|
|
if (p != null && ai != null) {
|
|
final int scrollX = mScrollX;
|
|
final int scrollY = mScrollY;
|
|
final Rect r = ai.mTmpInvalRect;
|
|
r.set(dirty.left - scrollX, dirty.top - scrollY,
|
|
dirty.right - scrollX, dirty.bottom - scrollY);
|
|
mParent.invalidateChild(this, r);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mark the the area defined by the rect (l,t,r,b) as needing to be drawn.
|
|
* The coordinates of the dirty rect are relative to the view.
|
|
* If the view is visible, {@link #onDraw} will be called at some point
|
|
* in the future. This must be called from a UI thread. To call
|
|
* from a non-UI thread, call {@link #postInvalidate()}.
|
|
* @param l the left position of the dirty region
|
|
* @param t the top position of the dirty region
|
|
* @param r the right position of the dirty region
|
|
* @param b the bottom position of the dirty region
|
|
*/
|
|
public void invalidate(int l, int t, int r, int b) {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE);
|
|
}
|
|
|
|
if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS)) {
|
|
mPrivateFlags &= ~DRAWING_CACHE_VALID;
|
|
final ViewParent p = mParent;
|
|
final AttachInfo ai = mAttachInfo;
|
|
if (p != null && ai != null && l < r && t < b) {
|
|
final int scrollX = mScrollX;
|
|
final int scrollY = mScrollY;
|
|
final Rect tmpr = ai.mTmpInvalRect;
|
|
tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY);
|
|
p.invalidateChild(this, tmpr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Invalidate the whole view. If the view is visible, {@link #onDraw} will
|
|
* be called at some point in the future. This must be called from a
|
|
* UI thread. To call from a non-UI thread, call {@link #postInvalidate()}.
|
|
*/
|
|
public void invalidate() {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE);
|
|
}
|
|
|
|
if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS)) {
|
|
mPrivateFlags &= ~DRAWN & ~DRAWING_CACHE_VALID;
|
|
final ViewParent p = mParent;
|
|
final AttachInfo ai = mAttachInfo;
|
|
if (p != null && ai != null) {
|
|
final Rect r = ai.mTmpInvalRect;
|
|
r.set(0, 0, mRight - mLeft, mBottom - mTop);
|
|
// Don't call invalidate -- we don't want to internally scroll
|
|
// our own bounds
|
|
p.invalidateChild(this, r);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this View is opaque. An opaque View guarantees that it will
|
|
* draw all the pixels overlapping its bounds using a fully opaque color.
|
|
*
|
|
* Subclasses of View should override this method whenever possible to indicate
|
|
* whether an instance is opaque. Opaque Views are treated in a special way by
|
|
* the View hierarchy, possibly allowing it to perform optimizations during
|
|
* invalidate/draw passes.
|
|
*
|
|
* @return True if this View is guaranteed to be fully opaque, false otherwise.
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "drawing")
|
|
public boolean isOpaque() {
|
|
return (mPrivateFlags & OPAQUE_MASK) == OPAQUE_MASK;
|
|
}
|
|
|
|
private void computeOpaqueFlags() {
|
|
// Opaque if:
|
|
// - Has a background
|
|
// - Background is opaque
|
|
// - Doesn't have scrollbars or scrollbars are inside overlay
|
|
|
|
if (mBGDrawable != null && mBGDrawable.getOpacity() == PixelFormat.OPAQUE) {
|
|
mPrivateFlags |= OPAQUE_BACKGROUND;
|
|
} else {
|
|
mPrivateFlags &= ~OPAQUE_BACKGROUND;
|
|
}
|
|
|
|
final int flags = mViewFlags;
|
|
if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) ||
|
|
(flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY) {
|
|
mPrivateFlags |= OPAQUE_SCROLLBARS;
|
|
} else {
|
|
mPrivateFlags &= ~OPAQUE_SCROLLBARS;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @hide
|
|
*/
|
|
protected boolean hasOpaqueScrollbars() {
|
|
return (mPrivateFlags & OPAQUE_SCROLLBARS) == OPAQUE_SCROLLBARS;
|
|
}
|
|
|
|
/**
|
|
* @return A handler associated with the thread running the View. This
|
|
* handler can be used to pump events in the UI events queue.
|
|
*/
|
|
public Handler getHandler() {
|
|
if (mAttachInfo != null) {
|
|
return mAttachInfo.mHandler;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Causes the Runnable to be added to the message queue.
|
|
* The runnable will be run on the user interface thread.
|
|
*
|
|
* @param action The Runnable that will be executed.
|
|
*
|
|
* @return Returns true if the Runnable was successfully placed in to the
|
|
* message queue. Returns false on failure, usually because the
|
|
* looper processing the message queue is exiting.
|
|
*/
|
|
public boolean post(Runnable action) {
|
|
Handler handler;
|
|
if (mAttachInfo != null) {
|
|
handler = mAttachInfo.mHandler;
|
|
} else {
|
|
// Assume that post will succeed later
|
|
ViewRoot.getRunQueue().post(action);
|
|
return true;
|
|
}
|
|
|
|
return handler.post(action);
|
|
}
|
|
|
|
/**
|
|
* Causes the Runnable to be added to the message queue, to be run
|
|
* after the specified amount of time elapses.
|
|
* The runnable will be run on the user interface thread.
|
|
*
|
|
* @param action The Runnable that will be executed.
|
|
* @param delayMillis The delay (in milliseconds) until the Runnable
|
|
* will be executed.
|
|
*
|
|
* @return true if the Runnable was successfully placed in to the
|
|
* message queue. Returns false on failure, usually because the
|
|
* looper processing the message queue is exiting. Note that a
|
|
* result of true does not mean the Runnable will be processed --
|
|
* if the looper is quit before the delivery time of the message
|
|
* occurs then the message will be dropped.
|
|
*/
|
|
public boolean postDelayed(Runnable action, long delayMillis) {
|
|
Handler handler;
|
|
if (mAttachInfo != null) {
|
|
handler = mAttachInfo.mHandler;
|
|
} else {
|
|
// Assume that post will succeed later
|
|
ViewRoot.getRunQueue().postDelayed(action, delayMillis);
|
|
return true;
|
|
}
|
|
|
|
return handler.postDelayed(action, delayMillis);
|
|
}
|
|
|
|
/**
|
|
* Removes the specified Runnable from the message queue.
|
|
*
|
|
* @param action The Runnable to remove from the message handling queue
|
|
*
|
|
* @return true if this view could ask the Handler to remove the Runnable,
|
|
* false otherwise. When the returned value is true, the Runnable
|
|
* may or may not have been actually removed from the message queue
|
|
* (for instance, if the Runnable was not in the queue already.)
|
|
*/
|
|
public boolean removeCallbacks(Runnable action) {
|
|
Handler handler;
|
|
if (mAttachInfo != null) {
|
|
handler = mAttachInfo.mHandler;
|
|
} else {
|
|
// Assume that post will succeed later
|
|
ViewRoot.getRunQueue().removeCallbacks(action);
|
|
return true;
|
|
}
|
|
|
|
handler.removeCallbacks(action);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Cause an invalidate to happen on a subsequent cycle through the event loop.
|
|
* Use this to invalidate the View from a non-UI thread.
|
|
*
|
|
* @see #invalidate()
|
|
*/
|
|
public void postInvalidate() {
|
|
postInvalidateDelayed(0);
|
|
}
|
|
|
|
/**
|
|
* Cause an invalidate of the specified area to happen on a subsequent cycle
|
|
* through the event loop. Use this to invalidate the View from a non-UI thread.
|
|
*
|
|
* @param left The left coordinate of the rectangle to invalidate.
|
|
* @param top The top coordinate of the rectangle to invalidate.
|
|
* @param right The right coordinate of the rectangle to invalidate.
|
|
* @param bottom The bottom coordinate of the rectangle to invalidate.
|
|
*
|
|
* @see #invalidate(int, int, int, int)
|
|
* @see #invalidate(Rect)
|
|
*/
|
|
public void postInvalidate(int left, int top, int right, int bottom) {
|
|
postInvalidateDelayed(0, left, top, right, bottom);
|
|
}
|
|
|
|
/**
|
|
* Cause an invalidate to happen on a subsequent cycle through the event
|
|
* loop. Waits for the specified amount of time.
|
|
*
|
|
* @param delayMilliseconds the duration in milliseconds to delay the
|
|
* invalidation by
|
|
*/
|
|
public void postInvalidateDelayed(long delayMilliseconds) {
|
|
// We try only with the AttachInfo because there's no point in invalidating
|
|
// if we are not attached to our window
|
|
if (mAttachInfo != null) {
|
|
Message msg = Message.obtain();
|
|
msg.what = AttachInfo.INVALIDATE_MSG;
|
|
msg.obj = this;
|
|
mAttachInfo.mHandler.sendMessageDelayed(msg, delayMilliseconds);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cause an invalidate of the specified area to happen on a subsequent cycle
|
|
* through the event loop. Waits for the specified amount of time.
|
|
*
|
|
* @param delayMilliseconds the duration in milliseconds to delay the
|
|
* invalidation by
|
|
* @param left The left coordinate of the rectangle to invalidate.
|
|
* @param top The top coordinate of the rectangle to invalidate.
|
|
* @param right The right coordinate of the rectangle to invalidate.
|
|
* @param bottom The bottom coordinate of the rectangle to invalidate.
|
|
*/
|
|
public void postInvalidateDelayed(long delayMilliseconds, int left, int top,
|
|
int right, int bottom) {
|
|
|
|
// We try only with the AttachInfo because there's no point in invalidating
|
|
// if we are not attached to our window
|
|
if (mAttachInfo != null) {
|
|
final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.acquire();
|
|
info.target = this;
|
|
info.left = left;
|
|
info.top = top;
|
|
info.right = right;
|
|
info.bottom = bottom;
|
|
|
|
final Message msg = Message.obtain();
|
|
msg.what = AttachInfo.INVALIDATE_RECT_MSG;
|
|
msg.obj = info;
|
|
mAttachInfo.mHandler.sendMessageDelayed(msg, delayMilliseconds);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called by a parent to request that a child update its values for mScrollX
|
|
* and mScrollY if necessary. This will typically be done if the child is
|
|
* animating a scroll using a {@link android.widget.Scroller Scroller}
|
|
* object.
|
|
*/
|
|
public void computeScroll() {
|
|
}
|
|
|
|
/**
|
|
* <p>Indicate whether the horizontal edges are faded when the view is
|
|
* scrolled horizontally.</p>
|
|
*
|
|
* @return true if the horizontal edges should are faded on scroll, false
|
|
* otherwise
|
|
*
|
|
* @see #setHorizontalFadingEdgeEnabled(boolean)
|
|
* @attr ref android.R.styleable#View_fadingEdge
|
|
*/
|
|
public boolean isHorizontalFadingEdgeEnabled() {
|
|
return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL;
|
|
}
|
|
|
|
/**
|
|
* <p>Define whether the horizontal edges should be faded when this view
|
|
* is scrolled horizontally.</p>
|
|
*
|
|
* @param horizontalFadingEdgeEnabled true if the horizontal edges should
|
|
* be faded when the view is scrolled
|
|
* horizontally
|
|
*
|
|
* @see #isHorizontalFadingEdgeEnabled()
|
|
* @attr ref android.R.styleable#View_fadingEdge
|
|
*/
|
|
public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) {
|
|
if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) {
|
|
if (horizontalFadingEdgeEnabled) {
|
|
initScrollCache();
|
|
}
|
|
|
|
mViewFlags ^= FADING_EDGE_HORIZONTAL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Indicate whether the vertical edges are faded when the view is
|
|
* scrolled horizontally.</p>
|
|
*
|
|
* @return true if the vertical edges should are faded on scroll, false
|
|
* otherwise
|
|
*
|
|
* @see #setVerticalFadingEdgeEnabled(boolean)
|
|
* @attr ref android.R.styleable#View_fadingEdge
|
|
*/
|
|
public boolean isVerticalFadingEdgeEnabled() {
|
|
return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL;
|
|
}
|
|
|
|
/**
|
|
* <p>Define whether the vertical edges should be faded when this view
|
|
* is scrolled vertically.</p>
|
|
*
|
|
* @param verticalFadingEdgeEnabled true if the vertical edges should
|
|
* be faded when the view is scrolled
|
|
* vertically
|
|
*
|
|
* @see #isVerticalFadingEdgeEnabled()
|
|
* @attr ref android.R.styleable#View_fadingEdge
|
|
*/
|
|
public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) {
|
|
if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) {
|
|
if (verticalFadingEdgeEnabled) {
|
|
initScrollCache();
|
|
}
|
|
|
|
mViewFlags ^= FADING_EDGE_VERTICAL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the strength, or intensity, of the top faded edge. The strength is
|
|
* a value between 0.0 (no fade) and 1.0 (full fade). The default implementation
|
|
* returns 0.0 or 1.0 but no value in between.
|
|
*
|
|
* Subclasses should override this method to provide a smoother fade transition
|
|
* when scrolling occurs.
|
|
*
|
|
* @return the intensity of the top fade as a float between 0.0f and 1.0f
|
|
*/
|
|
protected float getTopFadingEdgeStrength() {
|
|
return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f;
|
|
}
|
|
|
|
/**
|
|
* Returns the strength, or intensity, of the bottom faded edge. The strength is
|
|
* a value between 0.0 (no fade) and 1.0 (full fade). The default implementation
|
|
* returns 0.0 or 1.0 but no value in between.
|
|
*
|
|
* Subclasses should override this method to provide a smoother fade transition
|
|
* when scrolling occurs.
|
|
*
|
|
* @return the intensity of the bottom fade as a float between 0.0f and 1.0f
|
|
*/
|
|
protected float getBottomFadingEdgeStrength() {
|
|
return computeVerticalScrollOffset() + computeVerticalScrollExtent() <
|
|
computeVerticalScrollRange() ? 1.0f : 0.0f;
|
|
}
|
|
|
|
/**
|
|
* Returns the strength, or intensity, of the left faded edge. The strength is
|
|
* a value between 0.0 (no fade) and 1.0 (full fade). The default implementation
|
|
* returns 0.0 or 1.0 but no value in between.
|
|
*
|
|
* Subclasses should override this method to provide a smoother fade transition
|
|
* when scrolling occurs.
|
|
*
|
|
* @return the intensity of the left fade as a float between 0.0f and 1.0f
|
|
*/
|
|
protected float getLeftFadingEdgeStrength() {
|
|
return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f;
|
|
}
|
|
|
|
/**
|
|
* Returns the strength, or intensity, of the right faded edge. The strength is
|
|
* a value between 0.0 (no fade) and 1.0 (full fade). The default implementation
|
|
* returns 0.0 or 1.0 but no value in between.
|
|
*
|
|
* Subclasses should override this method to provide a smoother fade transition
|
|
* when scrolling occurs.
|
|
*
|
|
* @return the intensity of the right fade as a float between 0.0f and 1.0f
|
|
*/
|
|
protected float getRightFadingEdgeStrength() {
|
|
return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() <
|
|
computeHorizontalScrollRange() ? 1.0f : 0.0f;
|
|
}
|
|
|
|
/**
|
|
* <p>Indicate whether the horizontal scrollbar should be drawn or not. The
|
|
* scrollbar is not drawn by default.</p>
|
|
*
|
|
* @return true if the horizontal scrollbar should be painted, false
|
|
* otherwise
|
|
*
|
|
* @see #setHorizontalScrollBarEnabled(boolean)
|
|
*/
|
|
public boolean isHorizontalScrollBarEnabled() {
|
|
return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL;
|
|
}
|
|
|
|
/**
|
|
* <p>Define whether the horizontal scrollbar should be drawn or not. The
|
|
* scrollbar is not drawn by default.</p>
|
|
*
|
|
* @param horizontalScrollBarEnabled true if the horizontal scrollbar should
|
|
* be painted
|
|
*
|
|
* @see #isHorizontalScrollBarEnabled()
|
|
*/
|
|
public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) {
|
|
if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) {
|
|
mViewFlags ^= SCROLLBARS_HORIZONTAL;
|
|
computeOpaqueFlags();
|
|
recomputePadding();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Indicate whether the vertical scrollbar should be drawn or not. The
|
|
* scrollbar is not drawn by default.</p>
|
|
*
|
|
* @return true if the vertical scrollbar should be painted, false
|
|
* otherwise
|
|
*
|
|
* @see #setVerticalScrollBarEnabled(boolean)
|
|
*/
|
|
public boolean isVerticalScrollBarEnabled() {
|
|
return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL;
|
|
}
|
|
|
|
/**
|
|
* <p>Define whether the vertical scrollbar should be drawn or not. The
|
|
* scrollbar is not drawn by default.</p>
|
|
*
|
|
* @param verticalScrollBarEnabled true if the vertical scrollbar should
|
|
* be painted
|
|
*
|
|
* @see #isVerticalScrollBarEnabled()
|
|
*/
|
|
public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) {
|
|
if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) {
|
|
mViewFlags ^= SCROLLBARS_VERTICAL;
|
|
computeOpaqueFlags();
|
|
recomputePadding();
|
|
}
|
|
}
|
|
|
|
private void recomputePadding() {
|
|
setPadding(mPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom);
|
|
}
|
|
|
|
/**
|
|
* Define whether scrollbars will fade when the view is not scrolling.
|
|
*
|
|
* @param fadeScrollbars wheter to enable fading
|
|
*
|
|
*/
|
|
public void setScrollbarFadingEnabled(boolean fadeScrollbars) {
|
|
initScrollCache();
|
|
final ScrollabilityCache scrollabilityCache = mScrollCache;
|
|
scrollabilityCache.fadeScrollBars = fadeScrollbars;
|
|
if (fadeScrollbars) {
|
|
scrollabilityCache.state = ScrollabilityCache.OFF;
|
|
} else {
|
|
scrollabilityCache.state = ScrollabilityCache.ON;
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
* Returns true if scrollbars will fade when this view is not scrolling
|
|
*
|
|
* @return true if scrollbar fading is enabled
|
|
*/
|
|
public boolean isScrollbarFadingEnabled() {
|
|
return mScrollCache != null && mScrollCache.fadeScrollBars;
|
|
}
|
|
|
|
/**
|
|
* <p>Specify the style of the scrollbars. The scrollbars can be overlaid or
|
|
* inset. When inset, they add to the padding of the view. And the scrollbars
|
|
* can be drawn inside the padding area or on the edge of the view. For example,
|
|
* if a view has a background drawable and you want to draw the scrollbars
|
|
* inside the padding specified by the drawable, you can use
|
|
* SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to
|
|
* appear at the edge of the view, ignoring the padding, then you can use
|
|
* SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p>
|
|
* @param style the style of the scrollbars. Should be one of
|
|
* SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET,
|
|
* SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.
|
|
* @see #SCROLLBARS_INSIDE_OVERLAY
|
|
* @see #SCROLLBARS_INSIDE_INSET
|
|
* @see #SCROLLBARS_OUTSIDE_OVERLAY
|
|
* @see #SCROLLBARS_OUTSIDE_INSET
|
|
*/
|
|
public void setScrollBarStyle(int style) {
|
|
if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) {
|
|
mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK);
|
|
computeOpaqueFlags();
|
|
recomputePadding();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Returns the current scrollbar style.</p>
|
|
* @return the current scrollbar style
|
|
* @see #SCROLLBARS_INSIDE_OVERLAY
|
|
* @see #SCROLLBARS_INSIDE_INSET
|
|
* @see #SCROLLBARS_OUTSIDE_OVERLAY
|
|
* @see #SCROLLBARS_OUTSIDE_INSET
|
|
*/
|
|
public int getScrollBarStyle() {
|
|
return mViewFlags & SCROLLBARS_STYLE_MASK;
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the horizontal range that the horizontal scrollbar
|
|
* represents.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeHorizontalScrollExtent()} and
|
|
* {@link #computeHorizontalScrollOffset()}.</p>
|
|
*
|
|
* <p>The default range is the drawing width of this view.</p>
|
|
*
|
|
* @return the total horizontal range represented by the horizontal
|
|
* scrollbar
|
|
*
|
|
* @see #computeHorizontalScrollExtent()
|
|
* @see #computeHorizontalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeHorizontalScrollRange() {
|
|
return getWidth();
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the horizontal offset of the horizontal scrollbar's thumb
|
|
* within the horizontal range. This value is used to compute the position
|
|
* of the thumb within the scrollbar's track.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeHorizontalScrollRange()} and
|
|
* {@link #computeHorizontalScrollExtent()}.</p>
|
|
*
|
|
* <p>The default offset is the scroll offset of this view.</p>
|
|
*
|
|
* @return the horizontal offset of the scrollbar's thumb
|
|
*
|
|
* @see #computeHorizontalScrollRange()
|
|
* @see #computeHorizontalScrollExtent()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeHorizontalScrollOffset() {
|
|
return mScrollX;
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the horizontal extent of the horizontal scrollbar's thumb
|
|
* within the horizontal range. This value is used to compute the length
|
|
* of the thumb within the scrollbar's track.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeHorizontalScrollRange()} and
|
|
* {@link #computeHorizontalScrollOffset()}.</p>
|
|
*
|
|
* <p>The default extent is the drawing width of this view.</p>
|
|
*
|
|
* @return the horizontal extent of the scrollbar's thumb
|
|
*
|
|
* @see #computeHorizontalScrollRange()
|
|
* @see #computeHorizontalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeHorizontalScrollExtent() {
|
|
return getWidth();
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the vertical range that the vertical scrollbar represents.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeVerticalScrollExtent()} and
|
|
* {@link #computeVerticalScrollOffset()}.</p>
|
|
*
|
|
* @return the total vertical range represented by the vertical scrollbar
|
|
*
|
|
* <p>The default range is the drawing height of this view.</p>
|
|
*
|
|
* @see #computeVerticalScrollExtent()
|
|
* @see #computeVerticalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeVerticalScrollRange() {
|
|
return getHeight();
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the vertical offset of the vertical scrollbar's thumb
|
|
* within the horizontal range. This value is used to compute the position
|
|
* of the thumb within the scrollbar's track.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeVerticalScrollRange()} and
|
|
* {@link #computeVerticalScrollExtent()}.</p>
|
|
*
|
|
* <p>The default offset is the scroll offset of this view.</p>
|
|
*
|
|
* @return the vertical offset of the scrollbar's thumb
|
|
*
|
|
* @see #computeVerticalScrollRange()
|
|
* @see #computeVerticalScrollExtent()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeVerticalScrollOffset() {
|
|
return mScrollY;
|
|
}
|
|
|
|
/**
|
|
* <p>Compute the vertical extent of the horizontal scrollbar's thumb
|
|
* within the vertical range. This value is used to compute the length
|
|
* of the thumb within the scrollbar's track.</p>
|
|
*
|
|
* <p>The range is expressed in arbitrary units that must be the same as the
|
|
* units used by {@link #computeVerticalScrollRange()} and
|
|
* {@link #computeVerticalScrollOffset()}.</p>
|
|
*
|
|
* <p>The default extent is the drawing height of this view.</p>
|
|
*
|
|
* @return the vertical extent of the scrollbar's thumb
|
|
*
|
|
* @see #computeVerticalScrollRange()
|
|
* @see #computeVerticalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
*/
|
|
protected int computeVerticalScrollExtent() {
|
|
return getHeight();
|
|
}
|
|
|
|
/**
|
|
* <p>Request the drawing of the horizontal and the vertical scrollbar. The
|
|
* scrollbars are painted only if they have been awakened first.</p>
|
|
*
|
|
* @param canvas the canvas on which to draw the scrollbars
|
|
*
|
|
* @see #awakenScrollBars(int)
|
|
*/
|
|
protected final void onDrawScrollBars(Canvas canvas) {
|
|
// scrollbars are drawn only when the animation is running
|
|
final ScrollabilityCache cache = mScrollCache;
|
|
if (cache != null) {
|
|
|
|
int state = cache.state;
|
|
|
|
if (state == ScrollabilityCache.OFF) {
|
|
return;
|
|
}
|
|
|
|
boolean invalidate = false;
|
|
|
|
if (state == ScrollabilityCache.FADING) {
|
|
// We're fading -- get our fade interpolation
|
|
if (cache.interpolatorValues == null) {
|
|
cache.interpolatorValues = new float[1];
|
|
}
|
|
|
|
float[] values = cache.interpolatorValues;
|
|
|
|
// Stops the animation if we're done
|
|
if (cache.scrollBarInterpolator.timeToValues(values) ==
|
|
Interpolator.Result.FREEZE_END) {
|
|
cache.state = ScrollabilityCache.OFF;
|
|
} else {
|
|
cache.scrollBar.setAlpha(Math.round(values[0]));
|
|
}
|
|
|
|
// This will make the scroll bars inval themselves after
|
|
// drawing. We only want this when we're fading so that
|
|
// we prevent excessive redraws
|
|
invalidate = true;
|
|
} else {
|
|
// We're just on -- but we may have been fading before so
|
|
// reset alpha
|
|
cache.scrollBar.setAlpha(255);
|
|
}
|
|
|
|
|
|
final int viewFlags = mViewFlags;
|
|
|
|
final boolean drawHorizontalScrollBar =
|
|
(viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL;
|
|
final boolean drawVerticalScrollBar =
|
|
(viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL
|
|
&& !isVerticalScrollBarHidden();
|
|
|
|
if (drawVerticalScrollBar || drawHorizontalScrollBar) {
|
|
final int width = mRight - mLeft;
|
|
final int height = mBottom - mTop;
|
|
|
|
final ScrollBarDrawable scrollBar = cache.scrollBar;
|
|
int size = scrollBar.getSize(false);
|
|
if (size <= 0) {
|
|
size = cache.scrollBarSize;
|
|
}
|
|
|
|
final int scrollX = mScrollX;
|
|
final int scrollY = mScrollY;
|
|
final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0;
|
|
|
|
int left, top, right, bottom;
|
|
|
|
if (drawHorizontalScrollBar) {
|
|
scrollBar.setParameters(computeHorizontalScrollRange(),
|
|
computeHorizontalScrollOffset(),
|
|
computeHorizontalScrollExtent(), false);
|
|
final int verticalScrollBarGap = drawVerticalScrollBar ?
|
|
getVerticalScrollbarWidth() : 0;
|
|
top = scrollY + height - size - (mUserPaddingBottom & inside);
|
|
left = scrollX + (mPaddingLeft & inside);
|
|
right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap;
|
|
bottom = top + size;
|
|
onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom);
|
|
if (invalidate) {
|
|
invalidate(left, top, right, bottom);
|
|
}
|
|
}
|
|
|
|
if (drawVerticalScrollBar) {
|
|
scrollBar.setParameters(computeVerticalScrollRange(),
|
|
computeVerticalScrollOffset(),
|
|
computeVerticalScrollExtent(), true);
|
|
// TODO: Deal with RTL languages to position scrollbar on left
|
|
left = scrollX + width - size - (mUserPaddingRight & inside);
|
|
top = scrollY + (mPaddingTop & inside);
|
|
right = left + size;
|
|
bottom = scrollY + height - (mUserPaddingBottom & inside);
|
|
onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom);
|
|
if (invalidate) {
|
|
invalidate(left, top, right, bottom);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Override this if the vertical scrollbar needs to be hidden in a subclass, like when
|
|
* FastScroller is visible.
|
|
* @return whether to temporarily hide the vertical scrollbar
|
|
* @hide
|
|
*/
|
|
protected boolean isVerticalScrollBarHidden() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* <p>Draw the horizontal scrollbar if
|
|
* {@link #isHorizontalScrollBarEnabled()} returns true.</p>
|
|
*
|
|
* @param canvas the canvas on which to draw the scrollbar
|
|
* @param scrollBar the scrollbar's drawable
|
|
*
|
|
* @see #isHorizontalScrollBarEnabled()
|
|
* @see #computeHorizontalScrollRange()
|
|
* @see #computeHorizontalScrollExtent()
|
|
* @see #computeHorizontalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
* @hide
|
|
*/
|
|
protected void onDrawHorizontalScrollBar(Canvas canvas,
|
|
Drawable scrollBar,
|
|
int l, int t, int r, int b) {
|
|
scrollBar.setBounds(l, t, r, b);
|
|
scrollBar.draw(canvas);
|
|
}
|
|
|
|
/**
|
|
* <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()}
|
|
* returns true.</p>
|
|
*
|
|
* @param canvas the canvas on which to draw the scrollbar
|
|
* @param scrollBar the scrollbar's drawable
|
|
*
|
|
* @see #isVerticalScrollBarEnabled()
|
|
* @see #computeVerticalScrollRange()
|
|
* @see #computeVerticalScrollExtent()
|
|
* @see #computeVerticalScrollOffset()
|
|
* @see android.widget.ScrollBarDrawable
|
|
* @hide
|
|
*/
|
|
protected void onDrawVerticalScrollBar(Canvas canvas,
|
|
Drawable scrollBar,
|
|
int l, int t, int r, int b) {
|
|
scrollBar.setBounds(l, t, r, b);
|
|
scrollBar.draw(canvas);
|
|
}
|
|
|
|
/**
|
|
* Implement this to do your drawing.
|
|
*
|
|
* @param canvas the canvas on which the background will be drawn
|
|
*/
|
|
protected void onDraw(Canvas canvas) {
|
|
}
|
|
|
|
/*
|
|
* Caller is responsible for calling requestLayout if necessary.
|
|
* (This allows addViewInLayout to not request a new layout.)
|
|
*/
|
|
void assignParent(ViewParent parent) {
|
|
if (mParent == null) {
|
|
mParent = parent;
|
|
} else if (parent == null) {
|
|
mParent = null;
|
|
} else {
|
|
throw new RuntimeException("view " + this + " being added, but"
|
|
+ " it already has a parent");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is called when the view is attached to a window. At this point it
|
|
* has a Surface and will start drawing. Note that this function is
|
|
* guaranteed to be called before {@link #onDraw}, however it may be called
|
|
* any time before the first onDraw -- including before or after
|
|
* {@link #onMeasure}.
|
|
*
|
|
* @see #onDetachedFromWindow()
|
|
*/
|
|
protected void onAttachedToWindow() {
|
|
if ((mPrivateFlags & REQUEST_TRANSPARENT_REGIONS) != 0) {
|
|
mParent.requestTransparentRegion(this);
|
|
}
|
|
if ((mPrivateFlags & AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) {
|
|
initialAwakenScrollBars();
|
|
mPrivateFlags &= ~AWAKEN_SCROLL_BARS_ON_ATTACH;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is called when the view is detached from a window. At this point it
|
|
* no longer has a surface for drawing.
|
|
*
|
|
* @see #onAttachedToWindow()
|
|
*/
|
|
protected void onDetachedFromWindow() {
|
|
mPrivateFlags &= ~CANCEL_NEXT_UP_EVENT;
|
|
removeUnsetPressCallback();
|
|
removeLongPressCallback();
|
|
destroyDrawingCache();
|
|
}
|
|
|
|
/**
|
|
* @return The number of times this view has been attached to a window
|
|
*/
|
|
protected int getWindowAttachCount() {
|
|
return mWindowAttachCount;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a unique token identifying the window this view is attached to.
|
|
* @return Return the window's token for use in
|
|
* {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}.
|
|
*/
|
|
public IBinder getWindowToken() {
|
|
return mAttachInfo != null ? mAttachInfo.mWindowToken : null;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a unique token identifying the top-level "real" window of
|
|
* the window that this view is attached to. That is, this is like
|
|
* {@link #getWindowToken}, except if the window this view in is a panel
|
|
* window (attached to another containing window), then the token of
|
|
* the containing window is returned instead.
|
|
*
|
|
* @return Returns the associated window token, either
|
|
* {@link #getWindowToken()} or the containing window's token.
|
|
*/
|
|
public IBinder getApplicationWindowToken() {
|
|
AttachInfo ai = mAttachInfo;
|
|
if (ai != null) {
|
|
IBinder appWindowToken = ai.mPanelParentWindowToken;
|
|
if (appWindowToken == null) {
|
|
appWindowToken = ai.mWindowToken;
|
|
}
|
|
return appWindowToken;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Retrieve private session object this view hierarchy is using to
|
|
* communicate with the window manager.
|
|
* @return the session object to communicate with the window manager
|
|
*/
|
|
/*package*/ IWindowSession getWindowSession() {
|
|
return mAttachInfo != null ? mAttachInfo.mSession : null;
|
|
}
|
|
|
|
/**
|
|
* @param info the {@link android.view.View.AttachInfo} to associated with
|
|
* this view
|
|
*/
|
|
void dispatchAttachedToWindow(AttachInfo info, int visibility) {
|
|
//System.out.println("Attached! " + this);
|
|
mAttachInfo = info;
|
|
mWindowAttachCount++;
|
|
if (mFloatingTreeObserver != null) {
|
|
info.mTreeObserver.merge(mFloatingTreeObserver);
|
|
mFloatingTreeObserver = null;
|
|
}
|
|
if ((mPrivateFlags&SCROLL_CONTAINER) != 0) {
|
|
mAttachInfo.mScrollContainers.add(this);
|
|
mPrivateFlags |= SCROLL_CONTAINER_ADDED;
|
|
}
|
|
performCollectViewAttributes(visibility);
|
|
onAttachedToWindow();
|
|
int vis = info.mWindowVisibility;
|
|
if (vis != GONE) {
|
|
onWindowVisibilityChanged(vis);
|
|
}
|
|
}
|
|
|
|
void dispatchDetachedFromWindow() {
|
|
//System.out.println("Detached! " + this);
|
|
AttachInfo info = mAttachInfo;
|
|
if (info != null) {
|
|
int vis = info.mWindowVisibility;
|
|
if (vis != GONE) {
|
|
onWindowVisibilityChanged(GONE);
|
|
}
|
|
}
|
|
|
|
onDetachedFromWindow();
|
|
if ((mPrivateFlags&SCROLL_CONTAINER_ADDED) != 0) {
|
|
mAttachInfo.mScrollContainers.remove(this);
|
|
mPrivateFlags &= ~SCROLL_CONTAINER_ADDED;
|
|
}
|
|
mAttachInfo = null;
|
|
}
|
|
|
|
/**
|
|
* Store this view hierarchy's frozen state into the given container.
|
|
*
|
|
* @param container The SparseArray in which to save the view's state.
|
|
*
|
|
* @see #restoreHierarchyState
|
|
* @see #dispatchSaveInstanceState
|
|
* @see #onSaveInstanceState
|
|
*/
|
|
public void saveHierarchyState(SparseArray<Parcelable> container) {
|
|
dispatchSaveInstanceState(container);
|
|
}
|
|
|
|
/**
|
|
* Called by {@link #saveHierarchyState} to store the state for this view and its children.
|
|
* May be overridden to modify how freezing happens to a view's children; for example, some
|
|
* views may want to not store state for their children.
|
|
*
|
|
* @param container The SparseArray in which to save the view's state.
|
|
*
|
|
* @see #dispatchRestoreInstanceState
|
|
* @see #saveHierarchyState
|
|
* @see #onSaveInstanceState
|
|
*/
|
|
protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) {
|
|
if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) {
|
|
mPrivateFlags &= ~SAVE_STATE_CALLED;
|
|
Parcelable state = onSaveInstanceState();
|
|
if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) {
|
|
throw new IllegalStateException(
|
|
"Derived class did not call super.onSaveInstanceState()");
|
|
}
|
|
if (state != null) {
|
|
// Log.i("View", "Freezing #" + Integer.toHexString(mID)
|
|
// + ": " + state);
|
|
container.put(mID, state);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Hook allowing a view to generate a representation of its internal state
|
|
* that can later be used to create a new instance with that same state.
|
|
* This state should only contain information that is not persistent or can
|
|
* not be reconstructed later. For example, you will never store your
|
|
* current position on screen because that will be computed again when a
|
|
* new instance of the view is placed in its view hierarchy.
|
|
* <p>
|
|
* Some examples of things you may store here: the current cursor position
|
|
* in a text view (but usually not the text itself since that is stored in a
|
|
* content provider or other persistent storage), the currently selected
|
|
* item in a list view.
|
|
*
|
|
* @return Returns a Parcelable object containing the view's current dynamic
|
|
* state, or null if there is nothing interesting to save. The
|
|
* default implementation returns null.
|
|
* @see #onRestoreInstanceState
|
|
* @see #saveHierarchyState
|
|
* @see #dispatchSaveInstanceState
|
|
* @see #setSaveEnabled(boolean)
|
|
*/
|
|
protected Parcelable onSaveInstanceState() {
|
|
mPrivateFlags |= SAVE_STATE_CALLED;
|
|
return BaseSavedState.EMPTY_STATE;
|
|
}
|
|
|
|
/**
|
|
* Restore this view hierarchy's frozen state from the given container.
|
|
*
|
|
* @param container The SparseArray which holds previously frozen states.
|
|
*
|
|
* @see #saveHierarchyState
|
|
* @see #dispatchRestoreInstanceState
|
|
* @see #onRestoreInstanceState
|
|
*/
|
|
public void restoreHierarchyState(SparseArray<Parcelable> container) {
|
|
dispatchRestoreInstanceState(container);
|
|
}
|
|
|
|
/**
|
|
* Called by {@link #restoreHierarchyState} to retrieve the state for this view and its
|
|
* children. May be overridden to modify how restoreing happens to a view's children; for
|
|
* example, some views may want to not store state for their children.
|
|
*
|
|
* @param container The SparseArray which holds previously saved state.
|
|
*
|
|
* @see #dispatchSaveInstanceState
|
|
* @see #restoreHierarchyState
|
|
* @see #onRestoreInstanceState
|
|
*/
|
|
protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
|
|
if (mID != NO_ID) {
|
|
Parcelable state = container.get(mID);
|
|
if (state != null) {
|
|
// Log.i("View", "Restoreing #" + Integer.toHexString(mID)
|
|
// + ": " + state);
|
|
mPrivateFlags &= ~SAVE_STATE_CALLED;
|
|
onRestoreInstanceState(state);
|
|
if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) {
|
|
throw new IllegalStateException(
|
|
"Derived class did not call super.onRestoreInstanceState()");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Hook allowing a view to re-apply a representation of its internal state that had previously
|
|
* been generated by {@link #onSaveInstanceState}. This function will never be called with a
|
|
* null state.
|
|
*
|
|
* @param state The frozen state that had previously been returned by
|
|
* {@link #onSaveInstanceState}.
|
|
*
|
|
* @see #onSaveInstanceState
|
|
* @see #restoreHierarchyState
|
|
* @see #dispatchRestoreInstanceState
|
|
*/
|
|
protected void onRestoreInstanceState(Parcelable state) {
|
|
mPrivateFlags |= SAVE_STATE_CALLED;
|
|
if (state != BaseSavedState.EMPTY_STATE && state != null) {
|
|
throw new IllegalArgumentException("Wrong state class, expecting View State but "
|
|
+ "received " + state.getClass().toString() + " instead. This usually happens "
|
|
+ "when two views of different type have the same id in the same hierarchy. "
|
|
+ "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure "
|
|
+ "other views do not use the same id.");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Return the time at which the drawing of the view hierarchy started.</p>
|
|
*
|
|
* @return the drawing start time in milliseconds
|
|
*/
|
|
public long getDrawingTime() {
|
|
return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0;
|
|
}
|
|
|
|
/**
|
|
* <p>Enables or disables the duplication of the parent's state into this view. When
|
|
* duplication is enabled, this view gets its drawable state from its parent rather
|
|
* than from its own internal properties.</p>
|
|
*
|
|
* <p>Note: in the current implementation, setting this property to true after the
|
|
* view was added to a ViewGroup might have no effect at all. This property should
|
|
* always be used from XML or set to true before adding this view to a ViewGroup.</p>
|
|
*
|
|
* <p>Note: if this view's parent addStateFromChildren property is enabled and this
|
|
* property is enabled, an exception will be thrown.</p>
|
|
*
|
|
* @param enabled True to enable duplication of the parent's drawable state, false
|
|
* to disable it.
|
|
*
|
|
* @see #getDrawableState()
|
|
* @see #isDuplicateParentStateEnabled()
|
|
*/
|
|
public void setDuplicateParentStateEnabled(boolean enabled) {
|
|
setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE);
|
|
}
|
|
|
|
/**
|
|
* <p>Indicates whether this duplicates its drawable state from its parent.</p>
|
|
*
|
|
* @return True if this view's drawable state is duplicated from the parent,
|
|
* false otherwise
|
|
*
|
|
* @see #getDrawableState()
|
|
* @see #setDuplicateParentStateEnabled(boolean)
|
|
*/
|
|
public boolean isDuplicateParentStateEnabled() {
|
|
return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE;
|
|
}
|
|
|
|
/**
|
|
* <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call
|
|
* to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a
|
|
* bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when
|
|
* the cache is enabled. To benefit from the cache, you must request the drawing cache by
|
|
* calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not
|
|
* null.</p>
|
|
*
|
|
* @param enabled true to enable the drawing cache, false otherwise
|
|
*
|
|
* @see #isDrawingCacheEnabled()
|
|
* @see #getDrawingCache()
|
|
* @see #buildDrawingCache()
|
|
*/
|
|
public void setDrawingCacheEnabled(boolean enabled) {
|
|
setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED);
|
|
}
|
|
|
|
/**
|
|
* <p>Indicates whether the drawing cache is enabled for this view.</p>
|
|
*
|
|
* @return true if the drawing cache is enabled
|
|
*
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #getDrawingCache()
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "drawing")
|
|
public boolean isDrawingCacheEnabled() {
|
|
return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED;
|
|
}
|
|
|
|
/**
|
|
* <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p>
|
|
*
|
|
* @return A non-scaled bitmap representing this view or null if cache is disabled.
|
|
*
|
|
* @see #getDrawingCache(boolean)
|
|
*/
|
|
public Bitmap getDrawingCache() {
|
|
return getDrawingCache(false);
|
|
}
|
|
|
|
/**
|
|
* <p>Returns the bitmap in which this view drawing is cached. The returned bitmap
|
|
* is null when caching is disabled. If caching is enabled and the cache is not ready,
|
|
* this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not
|
|
* draw from the cache when the cache is enabled. To benefit from the cache, you must
|
|
* request the drawing cache by calling this method and draw it on screen if the
|
|
* returned bitmap is not null.</p>
|
|
*
|
|
* <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled,
|
|
* this method will create a bitmap of the same size as this view. Because this bitmap
|
|
* will be drawn scaled by the parent ViewGroup, the result on screen might show
|
|
* scaling artifacts. To avoid such artifacts, you should call this method by setting
|
|
* the auto scaling to true. Doing so, however, will generate a bitmap of a different
|
|
* size than the view. This implies that your application must be able to handle this
|
|
* size.</p>
|
|
*
|
|
* @param autoScale Indicates whether the generated bitmap should be scaled based on
|
|
* the current density of the screen when the application is in compatibility
|
|
* mode.
|
|
*
|
|
* @return A bitmap representing this view or null if cache is disabled.
|
|
*
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #isDrawingCacheEnabled()
|
|
* @see #buildDrawingCache(boolean)
|
|
* @see #destroyDrawingCache()
|
|
*/
|
|
public Bitmap getDrawingCache(boolean autoScale) {
|
|
if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) {
|
|
return null;
|
|
}
|
|
if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) {
|
|
buildDrawingCache(autoScale);
|
|
}
|
|
return autoScale ? (mDrawingCache == null ? null : mDrawingCache.get()) :
|
|
(mUnscaledDrawingCache == null ? null : mUnscaledDrawingCache.get());
|
|
}
|
|
|
|
/**
|
|
* <p>Frees the resources used by the drawing cache. If you call
|
|
* {@link #buildDrawingCache()} manually without calling
|
|
* {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you
|
|
* should cleanup the cache with this method afterwards.</p>
|
|
*
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #buildDrawingCache()
|
|
* @see #getDrawingCache()
|
|
*/
|
|
public void destroyDrawingCache() {
|
|
if (mDrawingCache != null) {
|
|
final Bitmap bitmap = mDrawingCache.get();
|
|
if (bitmap != null) bitmap.recycle();
|
|
mDrawingCache = null;
|
|
}
|
|
if (mUnscaledDrawingCache != null) {
|
|
final Bitmap bitmap = mUnscaledDrawingCache.get();
|
|
if (bitmap != null) bitmap.recycle();
|
|
mUnscaledDrawingCache = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Setting a solid background color for the drawing cache's bitmaps will improve
|
|
* perfromance and memory usage. Note, though that this should only be used if this
|
|
* view will always be drawn on top of a solid color.
|
|
*
|
|
* @param color The background color to use for the drawing cache's bitmap
|
|
*
|
|
* @see #setDrawingCacheEnabled(boolean)
|
|
* @see #buildDrawingCache()
|
|
* @see #getDrawingCache()
|
|
*/
|
|
public void setDrawingCacheBackgroundColor(int color) {
|
|
if (color != mDrawingCacheBackgroundColor) {
|
|
mDrawingCacheBackgroundColor = color;
|
|
mPrivateFlags &= ~DRAWING_CACHE_VALID;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see #setDrawingCacheBackgroundColor(int)
|
|
*
|
|
* @return The background color to used for the drawing cache's bitmap
|
|
*/
|
|
public int getDrawingCacheBackgroundColor() {
|
|
return mDrawingCacheBackgroundColor;
|
|
}
|
|
|
|
/**
|
|
* <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p>
|
|
*
|
|
* @see #buildDrawingCache(boolean)
|
|
*/
|
|
public void buildDrawingCache() {
|
|
buildDrawingCache(false);
|
|
}
|
|
|
|
/**
|
|
* <p>Forces the drawing cache to be built if the drawing cache is invalid.</p>
|
|
*
|
|
* <p>If you call {@link #buildDrawingCache()} manually without calling
|
|
* {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you
|
|
* should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p>
|
|
*
|
|
* <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled,
|
|
* this method will create a bitmap of the same size as this view. Because this bitmap
|
|
* will be drawn scaled by the parent ViewGroup, the result on screen might show
|
|
* scaling artifacts. To avoid such artifacts, you should call this method by setting
|
|
* the auto scaling to true. Doing so, however, will generate a bitmap of a different
|
|
* size than the view. This implies that your application must be able to handle this
|
|
* size.</p>
|
|
*
|
|
* @see #getDrawingCache()
|
|
* @see #destroyDrawingCache()
|
|
*/
|
|
public void buildDrawingCache(boolean autoScale) {
|
|
if ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || (autoScale ?
|
|
(mDrawingCache == null || mDrawingCache.get() == null) :
|
|
(mUnscaledDrawingCache == null || mUnscaledDrawingCache.get() == null))) {
|
|
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.BUILD_CACHE);
|
|
}
|
|
if (Config.DEBUG && ViewDebug.profileDrawing) {
|
|
EventLog.writeEvent(60002, hashCode());
|
|
}
|
|
|
|
int width = mRight - mLeft;
|
|
int height = mBottom - mTop;
|
|
|
|
final AttachInfo attachInfo = mAttachInfo;
|
|
final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired;
|
|
|
|
if (autoScale && scalingRequired) {
|
|
width = (int) ((width * attachInfo.mApplicationScale) + 0.5f);
|
|
height = (int) ((height * attachInfo.mApplicationScale) + 0.5f);
|
|
}
|
|
|
|
final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor;
|
|
final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque();
|
|
final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache;
|
|
|
|
if (width <= 0 || height <= 0 ||
|
|
// Projected bitmap size in bytes
|
|
(width * height * (opaque && !use32BitCache ? 2 : 4) >
|
|
ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize())) {
|
|
destroyDrawingCache();
|
|
return;
|
|
}
|
|
|
|
boolean clear = true;
|
|
Bitmap bitmap = autoScale ? (mDrawingCache == null ? null : mDrawingCache.get()) :
|
|
(mUnscaledDrawingCache == null ? null : mUnscaledDrawingCache.get());
|
|
|
|
if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) {
|
|
Bitmap.Config quality;
|
|
if (!opaque) {
|
|
switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) {
|
|
case DRAWING_CACHE_QUALITY_AUTO:
|
|
quality = Bitmap.Config.ARGB_8888;
|
|
break;
|
|
case DRAWING_CACHE_QUALITY_LOW:
|
|
quality = Bitmap.Config.ARGB_4444;
|
|
break;
|
|
case DRAWING_CACHE_QUALITY_HIGH:
|
|
quality = Bitmap.Config.ARGB_8888;
|
|
break;
|
|
default:
|
|
quality = Bitmap.Config.ARGB_8888;
|
|
break;
|
|
}
|
|
} else {
|
|
// Optimization for translucent windows
|
|
// If the window is translucent, use a 32 bits bitmap to benefit from memcpy()
|
|
quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
|
|
}
|
|
|
|
// Try to cleanup memory
|
|
if (bitmap != null) bitmap.recycle();
|
|
|
|
try {
|
|
bitmap = Bitmap.createBitmap(width, height, quality);
|
|
bitmap.setDensity(getResources().getDisplayMetrics().densityDpi);
|
|
if (autoScale) {
|
|
mDrawingCache = new SoftReference<Bitmap>(bitmap);
|
|
} else {
|
|
mUnscaledDrawingCache = new SoftReference<Bitmap>(bitmap);
|
|
}
|
|
if (opaque && use32BitCache) bitmap.setHasAlpha(false);
|
|
} catch (OutOfMemoryError e) {
|
|
// If there is not enough memory to create the bitmap cache, just
|
|
// ignore the issue as bitmap caches are not required to draw the
|
|
// view hierarchy
|
|
if (autoScale) {
|
|
mDrawingCache = null;
|
|
} else {
|
|
mUnscaledDrawingCache = null;
|
|
}
|
|
return;
|
|
}
|
|
|
|
clear = drawingCacheBackgroundColor != 0;
|
|
}
|
|
|
|
Canvas canvas;
|
|
if (attachInfo != null) {
|
|
canvas = attachInfo.mCanvas;
|
|
if (canvas == null) {
|
|
canvas = new Canvas();
|
|
}
|
|
canvas.setBitmap(bitmap);
|
|
// Temporarily clobber the cached Canvas in case one of our children
|
|
// is also using a drawing cache. Without this, the children would
|
|
// steal the canvas by attaching their own bitmap to it and bad, bad
|
|
// thing would happen (invisible views, corrupted drawings, etc.)
|
|
attachInfo.mCanvas = null;
|
|
} else {
|
|
// This case should hopefully never or seldom happen
|
|
canvas = new Canvas(bitmap);
|
|
}
|
|
|
|
if (clear) {
|
|
bitmap.eraseColor(drawingCacheBackgroundColor);
|
|
}
|
|
|
|
computeScroll();
|
|
final int restoreCount = canvas.save();
|
|
|
|
if (autoScale && scalingRequired) {
|
|
final float scale = attachInfo.mApplicationScale;
|
|
canvas.scale(scale, scale);
|
|
}
|
|
|
|
canvas.translate(-mScrollX, -mScrollY);
|
|
|
|
mPrivateFlags |= DRAWN;
|
|
mPrivateFlags |= DRAWING_CACHE_VALID;
|
|
|
|
// Fast path for layouts with no backgrounds
|
|
if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW);
|
|
}
|
|
mPrivateFlags &= ~DIRTY_MASK;
|
|
dispatchDraw(canvas);
|
|
} else {
|
|
draw(canvas);
|
|
}
|
|
|
|
canvas.restoreToCount(restoreCount);
|
|
|
|
if (attachInfo != null) {
|
|
// Restore the cached Canvas for our siblings
|
|
attachInfo.mCanvas = canvas;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a snapshot of the view into a bitmap. We should probably make
|
|
* some form of this public, but should think about the API.
|
|
*/
|
|
Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) {
|
|
int width = mRight - mLeft;
|
|
int height = mBottom - mTop;
|
|
|
|
final AttachInfo attachInfo = mAttachInfo;
|
|
final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f;
|
|
width = (int) ((width * scale) + 0.5f);
|
|
height = (int) ((height * scale) + 0.5f);
|
|
|
|
Bitmap bitmap = Bitmap.createBitmap(width > 0 ? width : 1, height > 0 ? height : 1, quality);
|
|
if (bitmap == null) {
|
|
throw new OutOfMemoryError();
|
|
}
|
|
|
|
bitmap.setDensity(getResources().getDisplayMetrics().densityDpi);
|
|
|
|
Canvas canvas;
|
|
if (attachInfo != null) {
|
|
canvas = attachInfo.mCanvas;
|
|
if (canvas == null) {
|
|
canvas = new Canvas();
|
|
}
|
|
canvas.setBitmap(bitmap);
|
|
// Temporarily clobber the cached Canvas in case one of our children
|
|
// is also using a drawing cache. Without this, the children would
|
|
// steal the canvas by attaching their own bitmap to it and bad, bad
|
|
// things would happen (invisible views, corrupted drawings, etc.)
|
|
attachInfo.mCanvas = null;
|
|
} else {
|
|
// This case should hopefully never or seldom happen
|
|
canvas = new Canvas(bitmap);
|
|
}
|
|
|
|
if ((backgroundColor & 0xff000000) != 0) {
|
|
bitmap.eraseColor(backgroundColor);
|
|
}
|
|
|
|
computeScroll();
|
|
final int restoreCount = canvas.save();
|
|
canvas.scale(scale, scale);
|
|
canvas.translate(-mScrollX, -mScrollY);
|
|
|
|
// Temporarily remove the dirty mask
|
|
int flags = mPrivateFlags;
|
|
mPrivateFlags &= ~DIRTY_MASK;
|
|
|
|
// Fast path for layouts with no backgrounds
|
|
if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) {
|
|
dispatchDraw(canvas);
|
|
} else {
|
|
draw(canvas);
|
|
}
|
|
|
|
mPrivateFlags = flags;
|
|
|
|
canvas.restoreToCount(restoreCount);
|
|
|
|
if (attachInfo != null) {
|
|
// Restore the cached Canvas for our siblings
|
|
attachInfo.mCanvas = canvas;
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
/**
|
|
* Indicates whether this View is currently in edit mode. A View is usually
|
|
* in edit mode when displayed within a developer tool. For instance, if
|
|
* this View is being drawn by a visual user interface builder, this method
|
|
* should return true.
|
|
*
|
|
* Subclasses should check the return value of this method to provide
|
|
* different behaviors if their normal behavior might interfere with the
|
|
* host environment. For instance: the class spawns a thread in its
|
|
* constructor, the drawing code relies on device-specific features, etc.
|
|
*
|
|
* This method is usually checked in the drawing code of custom widgets.
|
|
*
|
|
* @return True if this View is in edit mode, false otherwise.
|
|
*/
|
|
public boolean isInEditMode() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* If the View draws content inside its padding and enables fading edges,
|
|
* it needs to support padding offsets. Padding offsets are added to the
|
|
* fading edges to extend the length of the fade so that it covers pixels
|
|
* drawn inside the padding.
|
|
*
|
|
* Subclasses of this class should override this method if they need
|
|
* to draw content inside the padding.
|
|
*
|
|
* @return True if padding offset must be applied, false otherwise.
|
|
*
|
|
* @see #getLeftPaddingOffset()
|
|
* @see #getRightPaddingOffset()
|
|
* @see #getTopPaddingOffset()
|
|
* @see #getBottomPaddingOffset()
|
|
*
|
|
* @since CURRENT
|
|
*/
|
|
protected boolean isPaddingOffsetRequired() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Amount by which to extend the left fading region. Called only when
|
|
* {@link #isPaddingOffsetRequired()} returns true.
|
|
*
|
|
* @return The left padding offset in pixels.
|
|
*
|
|
* @see #isPaddingOffsetRequired()
|
|
*
|
|
* @since CURRENT
|
|
*/
|
|
protected int getLeftPaddingOffset() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Amount by which to extend the right fading region. Called only when
|
|
* {@link #isPaddingOffsetRequired()} returns true.
|
|
*
|
|
* @return The right padding offset in pixels.
|
|
*
|
|
* @see #isPaddingOffsetRequired()
|
|
*
|
|
* @since CURRENT
|
|
*/
|
|
protected int getRightPaddingOffset() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Amount by which to extend the top fading region. Called only when
|
|
* {@link #isPaddingOffsetRequired()} returns true.
|
|
*
|
|
* @return The top padding offset in pixels.
|
|
*
|
|
* @see #isPaddingOffsetRequired()
|
|
*
|
|
* @since CURRENT
|
|
*/
|
|
protected int getTopPaddingOffset() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Amount by which to extend the bottom fading region. Called only when
|
|
* {@link #isPaddingOffsetRequired()} returns true.
|
|
*
|
|
* @return The bottom padding offset in pixels.
|
|
*
|
|
* @see #isPaddingOffsetRequired()
|
|
*
|
|
* @since CURRENT
|
|
*/
|
|
protected int getBottomPaddingOffset() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Manually render this view (and all of its children) to the given Canvas.
|
|
* The view must have already done a full layout before this function is
|
|
* called. When implementing a view, do not override this method; instead,
|
|
* you should implement {@link #onDraw}.
|
|
*
|
|
* @param canvas The Canvas to which the View is rendered.
|
|
*/
|
|
public void draw(Canvas canvas) {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW);
|
|
}
|
|
|
|
final int privateFlags = mPrivateFlags;
|
|
final boolean dirtyOpaque = (privateFlags & DIRTY_MASK) == DIRTY_OPAQUE &&
|
|
(mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState);
|
|
mPrivateFlags = (privateFlags & ~DIRTY_MASK) | DRAWN;
|
|
|
|
/*
|
|
* Draw traversal performs several drawing steps which must be executed
|
|
* in the appropriate order:
|
|
*
|
|
* 1. Draw the background
|
|
* 2. If necessary, save the canvas' layers to prepare for fading
|
|
* 3. Draw view's content
|
|
* 4. Draw children
|
|
* 5. If necessary, draw the fading edges and restore layers
|
|
* 6. Draw decorations (scrollbars for instance)
|
|
*/
|
|
|
|
// Step 1, draw the background, if needed
|
|
int saveCount;
|
|
|
|
if (!dirtyOpaque) {
|
|
final Drawable background = mBGDrawable;
|
|
if (background != null) {
|
|
final int scrollX = mScrollX;
|
|
final int scrollY = mScrollY;
|
|
|
|
if (mBackgroundSizeChanged) {
|
|
background.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
|
|
mBackgroundSizeChanged = false;
|
|
}
|
|
|
|
if ((scrollX | scrollY) == 0) {
|
|
background.draw(canvas);
|
|
} else {
|
|
canvas.translate(scrollX, scrollY);
|
|
background.draw(canvas);
|
|
canvas.translate(-scrollX, -scrollY);
|
|
}
|
|
}
|
|
}
|
|
|
|
// skip step 2 & 5 if possible (common case)
|
|
final int viewFlags = mViewFlags;
|
|
boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0;
|
|
boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0;
|
|
if (!verticalEdges && !horizontalEdges) {
|
|
// Step 3, draw the content
|
|
if (!dirtyOpaque) onDraw(canvas);
|
|
|
|
// Step 4, draw the children
|
|
dispatchDraw(canvas);
|
|
|
|
// Step 6, draw decorations (scrollbars)
|
|
onDrawScrollBars(canvas);
|
|
|
|
// we're done...
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Here we do the full fledged routine...
|
|
* (this is an uncommon case where speed matters less,
|
|
* this is why we repeat some of the tests that have been
|
|
* done above)
|
|
*/
|
|
|
|
boolean drawTop = false;
|
|
boolean drawBottom = false;
|
|
boolean drawLeft = false;
|
|
boolean drawRight = false;
|
|
|
|
float topFadeStrength = 0.0f;
|
|
float bottomFadeStrength = 0.0f;
|
|
float leftFadeStrength = 0.0f;
|
|
float rightFadeStrength = 0.0f;
|
|
|
|
// Step 2, save the canvas' layers
|
|
int paddingLeft = mPaddingLeft;
|
|
int paddingTop = mPaddingTop;
|
|
|
|
final boolean offsetRequired = isPaddingOffsetRequired();
|
|
if (offsetRequired) {
|
|
paddingLeft += getLeftPaddingOffset();
|
|
paddingTop += getTopPaddingOffset();
|
|
}
|
|
|
|
int left = mScrollX + paddingLeft;
|
|
int right = left + mRight - mLeft - mPaddingRight - paddingLeft;
|
|
int top = mScrollY + paddingTop;
|
|
int bottom = top + mBottom - mTop - mPaddingBottom - paddingTop;
|
|
|
|
if (offsetRequired) {
|
|
right += getRightPaddingOffset();
|
|
bottom += getBottomPaddingOffset();
|
|
}
|
|
|
|
final ScrollabilityCache scrollabilityCache = mScrollCache;
|
|
int length = scrollabilityCache.fadingEdgeLength;
|
|
|
|
// clip the fade length if top and bottom fades overlap
|
|
// overlapping fades produce odd-looking artifacts
|
|
if (verticalEdges && (top + length > bottom - length)) {
|
|
length = (bottom - top) / 2;
|
|
}
|
|
|
|
// also clip horizontal fades if necessary
|
|
if (horizontalEdges && (left + length > right - length)) {
|
|
length = (right - left) / 2;
|
|
}
|
|
|
|
if (verticalEdges) {
|
|
topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength()));
|
|
drawTop = topFadeStrength >= 0.0f;
|
|
bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength()));
|
|
drawBottom = bottomFadeStrength >= 0.0f;
|
|
}
|
|
|
|
if (horizontalEdges) {
|
|
leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength()));
|
|
drawLeft = leftFadeStrength >= 0.0f;
|
|
rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength()));
|
|
drawRight = rightFadeStrength >= 0.0f;
|
|
}
|
|
|
|
saveCount = canvas.getSaveCount();
|
|
|
|
int solidColor = getSolidColor();
|
|
if (solidColor == 0) {
|
|
final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG;
|
|
|
|
if (drawTop) {
|
|
canvas.saveLayer(left, top, right, top + length, null, flags);
|
|
}
|
|
|
|
if (drawBottom) {
|
|
canvas.saveLayer(left, bottom - length, right, bottom, null, flags);
|
|
}
|
|
|
|
if (drawLeft) {
|
|
canvas.saveLayer(left, top, left + length, bottom, null, flags);
|
|
}
|
|
|
|
if (drawRight) {
|
|
canvas.saveLayer(right - length, top, right, bottom, null, flags);
|
|
}
|
|
} else {
|
|
scrollabilityCache.setFadeColor(solidColor);
|
|
}
|
|
|
|
// Step 3, draw the content
|
|
if (!dirtyOpaque) onDraw(canvas);
|
|
|
|
// Step 4, draw the children
|
|
dispatchDraw(canvas);
|
|
|
|
// Step 5, draw the fade effect and restore layers
|
|
final Paint p = scrollabilityCache.paint;
|
|
final Matrix matrix = scrollabilityCache.matrix;
|
|
final Shader fade = scrollabilityCache.shader;
|
|
final float fadeHeight = scrollabilityCache.fadingEdgeLength;
|
|
|
|
if (drawTop) {
|
|
matrix.setScale(1, fadeHeight * topFadeStrength);
|
|
matrix.postTranslate(left, top);
|
|
fade.setLocalMatrix(matrix);
|
|
canvas.drawRect(left, top, right, top + length, p);
|
|
}
|
|
|
|
if (drawBottom) {
|
|
matrix.setScale(1, fadeHeight * bottomFadeStrength);
|
|
matrix.postRotate(180);
|
|
matrix.postTranslate(left, bottom);
|
|
fade.setLocalMatrix(matrix);
|
|
canvas.drawRect(left, bottom - length, right, bottom, p);
|
|
}
|
|
|
|
if (drawLeft) {
|
|
matrix.setScale(1, fadeHeight * leftFadeStrength);
|
|
matrix.postRotate(-90);
|
|
matrix.postTranslate(left, top);
|
|
fade.setLocalMatrix(matrix);
|
|
canvas.drawRect(left, top, left + length, bottom, p);
|
|
}
|
|
|
|
if (drawRight) {
|
|
matrix.setScale(1, fadeHeight * rightFadeStrength);
|
|
matrix.postRotate(90);
|
|
matrix.postTranslate(right, top);
|
|
fade.setLocalMatrix(matrix);
|
|
canvas.drawRect(right - length, top, right, bottom, p);
|
|
}
|
|
|
|
canvas.restoreToCount(saveCount);
|
|
|
|
// Step 6, draw decorations (scrollbars)
|
|
onDrawScrollBars(canvas);
|
|
}
|
|
|
|
/**
|
|
* Override this if your view is known to always be drawn on top of a solid color background,
|
|
* and needs to draw fading edges. Returning a non-zero color enables the view system to
|
|
* optimize the drawing of the fading edges. If you do return a non-zero color, the alpha
|
|
* should be set to 0xFF.
|
|
*
|
|
* @see #setVerticalFadingEdgeEnabled
|
|
* @see #setHorizontalFadingEdgeEnabled
|
|
*
|
|
* @return The known solid color background for this view, or 0 if the color may vary
|
|
*/
|
|
public int getSolidColor() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Build a human readable string representation of the specified view flags.
|
|
*
|
|
* @param flags the view flags to convert to a string
|
|
* @return a String representing the supplied flags
|
|
*/
|
|
private static String printFlags(int flags) {
|
|
String output = "";
|
|
int numFlags = 0;
|
|
if ((flags & FOCUSABLE_MASK) == FOCUSABLE) {
|
|
output += "TAKES_FOCUS";
|
|
numFlags++;
|
|
}
|
|
|
|
switch (flags & VISIBILITY_MASK) {
|
|
case INVISIBLE:
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "INVISIBLE";
|
|
// USELESS HERE numFlags++;
|
|
break;
|
|
case GONE:
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "GONE";
|
|
// USELESS HERE numFlags++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return output;
|
|
}
|
|
|
|
/**
|
|
* Build a human readable string representation of the specified private
|
|
* view flags.
|
|
*
|
|
* @param privateFlags the private view flags to convert to a string
|
|
* @return a String representing the supplied flags
|
|
*/
|
|
private static String printPrivateFlags(int privateFlags) {
|
|
String output = "";
|
|
int numFlags = 0;
|
|
|
|
if ((privateFlags & WANTS_FOCUS) == WANTS_FOCUS) {
|
|
output += "WANTS_FOCUS";
|
|
numFlags++;
|
|
}
|
|
|
|
if ((privateFlags & FOCUSED) == FOCUSED) {
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "FOCUSED";
|
|
numFlags++;
|
|
}
|
|
|
|
if ((privateFlags & SELECTED) == SELECTED) {
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "SELECTED";
|
|
numFlags++;
|
|
}
|
|
|
|
if ((privateFlags & IS_ROOT_NAMESPACE) == IS_ROOT_NAMESPACE) {
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "IS_ROOT_NAMESPACE";
|
|
numFlags++;
|
|
}
|
|
|
|
if ((privateFlags & HAS_BOUNDS) == HAS_BOUNDS) {
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "HAS_BOUNDS";
|
|
numFlags++;
|
|
}
|
|
|
|
if ((privateFlags & DRAWN) == DRAWN) {
|
|
if (numFlags > 0) {
|
|
output += " ";
|
|
}
|
|
output += "DRAWN";
|
|
// USELESS HERE numFlags++;
|
|
}
|
|
return output;
|
|
}
|
|
|
|
/**
|
|
* <p>Indicates whether or not this view's layout will be requested during
|
|
* the next hierarchy layout pass.</p>
|
|
*
|
|
* @return true if the layout will be forced during next layout pass
|
|
*/
|
|
public boolean isLayoutRequested() {
|
|
return (mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT;
|
|
}
|
|
|
|
/**
|
|
* Assign a size and position to a view and all of its
|
|
* descendants
|
|
*
|
|
* <p>This is the second phase of the layout mechanism.
|
|
* (The first is measuring). In this phase, each parent calls
|
|
* layout on all of its children to position them.
|
|
* This is typically done using the child measurements
|
|
* that were stored in the measure pass().
|
|
*
|
|
* Derived classes with children should override
|
|
* onLayout. In that method, they should
|
|
* call layout on each of their their children.
|
|
*
|
|
* @param l Left position, relative to parent
|
|
* @param t Top position, relative to parent
|
|
* @param r Right position, relative to parent
|
|
* @param b Bottom position, relative to parent
|
|
*/
|
|
public final void layout(int l, int t, int r, int b) {
|
|
boolean changed = setFrame(l, t, r, b);
|
|
if (changed || (mPrivateFlags & LAYOUT_REQUIRED) == LAYOUT_REQUIRED) {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_LAYOUT);
|
|
}
|
|
|
|
onLayout(changed, l, t, r, b);
|
|
mPrivateFlags &= ~LAYOUT_REQUIRED;
|
|
}
|
|
mPrivateFlags &= ~FORCE_LAYOUT;
|
|
}
|
|
|
|
/**
|
|
* Called from layout when this view should
|
|
* assign a size and position to each of its children.
|
|
*
|
|
* Derived classes with children should override
|
|
* this method and call layout on each of
|
|
* their their children.
|
|
* @param changed This is a new size or position for this view
|
|
* @param left Left position, relative to parent
|
|
* @param top Top position, relative to parent
|
|
* @param right Right position, relative to parent
|
|
* @param bottom Bottom position, relative to parent
|
|
*/
|
|
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
|
|
}
|
|
|
|
/**
|
|
* Assign a size and position to this view.
|
|
*
|
|
* This is called from layout.
|
|
*
|
|
* @param left Left position, relative to parent
|
|
* @param top Top position, relative to parent
|
|
* @param right Right position, relative to parent
|
|
* @param bottom Bottom position, relative to parent
|
|
* @return true if the new size and position are different than the
|
|
* previous ones
|
|
* {@hide}
|
|
*/
|
|
protected boolean setFrame(int left, int top, int right, int bottom) {
|
|
boolean changed = false;
|
|
|
|
if (DBG) {
|
|
Log.d("View", this + " View.setFrame(" + left + "," + top + ","
|
|
+ right + "," + bottom + ")");
|
|
}
|
|
|
|
if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) {
|
|
changed = true;
|
|
|
|
// Remember our drawn bit
|
|
int drawn = mPrivateFlags & DRAWN;
|
|
|
|
// Invalidate our old position
|
|
invalidate();
|
|
|
|
|
|
int oldWidth = mRight - mLeft;
|
|
int oldHeight = mBottom - mTop;
|
|
|
|
mLeft = left;
|
|
mTop = top;
|
|
mRight = right;
|
|
mBottom = bottom;
|
|
|
|
mPrivateFlags |= HAS_BOUNDS;
|
|
|
|
int newWidth = right - left;
|
|
int newHeight = bottom - top;
|
|
|
|
if (newWidth != oldWidth || newHeight != oldHeight) {
|
|
onSizeChanged(newWidth, newHeight, oldWidth, oldHeight);
|
|
}
|
|
|
|
if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) {
|
|
// If we are visible, force the DRAWN bit to on so that
|
|
// this invalidate will go through (at least to our parent).
|
|
// This is because someone may have invalidated this view
|
|
// before this call to setFrame came in, therby clearing
|
|
// the DRAWN bit.
|
|
mPrivateFlags |= DRAWN;
|
|
invalidate();
|
|
}
|
|
|
|
// Reset drawn bit to original value (invalidate turns it off)
|
|
mPrivateFlags |= drawn;
|
|
|
|
mBackgroundSizeChanged = true;
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
/**
|
|
* Finalize inflating a view from XML. This is called as the last phase
|
|
* of inflation, after all child views have been added.
|
|
*
|
|
* <p>Even if the subclass overrides onFinishInflate, they should always be
|
|
* sure to call the super method, so that we get called.
|
|
*/
|
|
protected void onFinishInflate() {
|
|
}
|
|
|
|
/**
|
|
* Returns the resources associated with this view.
|
|
*
|
|
* @return Resources object.
|
|
*/
|
|
public Resources getResources() {
|
|
return mResources;
|
|
}
|
|
|
|
/**
|
|
* Invalidates the specified Drawable.
|
|
*
|
|
* @param drawable the drawable to invalidate
|
|
*/
|
|
public void invalidateDrawable(Drawable drawable) {
|
|
if (verifyDrawable(drawable)) {
|
|
final Rect dirty = drawable.getBounds();
|
|
final int scrollX = mScrollX;
|
|
final int scrollY = mScrollY;
|
|
|
|
invalidate(dirty.left + scrollX, dirty.top + scrollY,
|
|
dirty.right + scrollX, dirty.bottom + scrollY);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Schedules an action on a drawable to occur at a specified time.
|
|
*
|
|
* @param who the recipient of the action
|
|
* @param what the action to run on the drawable
|
|
* @param when the time at which the action must occur. Uses the
|
|
* {@link SystemClock#uptimeMillis} timebase.
|
|
*/
|
|
public void scheduleDrawable(Drawable who, Runnable what, long when) {
|
|
if (verifyDrawable(who) && what != null && mAttachInfo != null) {
|
|
mAttachInfo.mHandler.postAtTime(what, who, when);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cancels a scheduled action on a drawable.
|
|
*
|
|
* @param who the recipient of the action
|
|
* @param what the action to cancel
|
|
*/
|
|
public void unscheduleDrawable(Drawable who, Runnable what) {
|
|
if (verifyDrawable(who) && what != null && mAttachInfo != null) {
|
|
mAttachInfo.mHandler.removeCallbacks(what, who);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unschedule any events associated with the given Drawable. This can be
|
|
* used when selecting a new Drawable into a view, so that the previous
|
|
* one is completely unscheduled.
|
|
*
|
|
* @param who The Drawable to unschedule.
|
|
*
|
|
* @see #drawableStateChanged
|
|
*/
|
|
public void unscheduleDrawable(Drawable who) {
|
|
if (mAttachInfo != null) {
|
|
mAttachInfo.mHandler.removeCallbacksAndMessages(who);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* If your view subclass is displaying its own Drawable objects, it should
|
|
* override this function and return true for any Drawable it is
|
|
* displaying. This allows animations for those drawables to be
|
|
* scheduled.
|
|
*
|
|
* <p>Be sure to call through to the super class when overriding this
|
|
* function.
|
|
*
|
|
* @param who The Drawable to verify. Return true if it is one you are
|
|
* displaying, else return the result of calling through to the
|
|
* super class.
|
|
*
|
|
* @return boolean If true than the Drawable is being displayed in the
|
|
* view; else false and it is not allowed to animate.
|
|
*
|
|
* @see #unscheduleDrawable
|
|
* @see #drawableStateChanged
|
|
*/
|
|
protected boolean verifyDrawable(Drawable who) {
|
|
return who == mBGDrawable;
|
|
}
|
|
|
|
/**
|
|
* This function is called whenever the state of the view changes in such
|
|
* a way that it impacts the state of drawables being shown.
|
|
*
|
|
* <p>Be sure to call through to the superclass when overriding this
|
|
* function.
|
|
*
|
|
* @see Drawable#setState
|
|
*/
|
|
protected void drawableStateChanged() {
|
|
Drawable d = mBGDrawable;
|
|
if (d != null && d.isStateful()) {
|
|
d.setState(getDrawableState());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Call this to force a view to update its drawable state. This will cause
|
|
* drawableStateChanged to be called on this view. Views that are interested
|
|
* in the new state should call getDrawableState.
|
|
*
|
|
* @see #drawableStateChanged
|
|
* @see #getDrawableState
|
|
*/
|
|
public void refreshDrawableState() {
|
|
mPrivateFlags |= DRAWABLE_STATE_DIRTY;
|
|
drawableStateChanged();
|
|
|
|
ViewParent parent = mParent;
|
|
if (parent != null) {
|
|
parent.childDrawableStateChanged(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return an array of resource IDs of the drawable states representing the
|
|
* current state of the view.
|
|
*
|
|
* @return The current drawable state
|
|
*
|
|
* @see Drawable#setState
|
|
* @see #drawableStateChanged
|
|
* @see #onCreateDrawableState
|
|
*/
|
|
public final int[] getDrawableState() {
|
|
if ((mDrawableState != null) && ((mPrivateFlags & DRAWABLE_STATE_DIRTY) == 0)) {
|
|
return mDrawableState;
|
|
} else {
|
|
mDrawableState = onCreateDrawableState(0);
|
|
mPrivateFlags &= ~DRAWABLE_STATE_DIRTY;
|
|
return mDrawableState;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Generate the new {@link android.graphics.drawable.Drawable} state for
|
|
* this view. This is called by the view
|
|
* system when the cached Drawable state is determined to be invalid. To
|
|
* retrieve the current state, you should use {@link #getDrawableState}.
|
|
*
|
|
* @param extraSpace if non-zero, this is the number of extra entries you
|
|
* would like in the returned array in which you can place your own
|
|
* states.
|
|
*
|
|
* @return Returns an array holding the current {@link Drawable} state of
|
|
* the view.
|
|
*
|
|
* @see #mergeDrawableStates
|
|
*/
|
|
protected int[] onCreateDrawableState(int extraSpace) {
|
|
if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE &&
|
|
mParent instanceof View) {
|
|
return ((View) mParent).onCreateDrawableState(extraSpace);
|
|
}
|
|
|
|
int[] drawableState;
|
|
|
|
int privateFlags = mPrivateFlags;
|
|
|
|
int viewStateIndex = (((privateFlags & PRESSED) != 0) ? 1 : 0);
|
|
|
|
viewStateIndex = (viewStateIndex << 1)
|
|
+ (((mViewFlags & ENABLED_MASK) == ENABLED) ? 1 : 0);
|
|
|
|
viewStateIndex = (viewStateIndex << 1) + (isFocused() ? 1 : 0);
|
|
|
|
viewStateIndex = (viewStateIndex << 1)
|
|
+ (((privateFlags & SELECTED) != 0) ? 1 : 0);
|
|
|
|
final boolean hasWindowFocus = hasWindowFocus();
|
|
viewStateIndex = (viewStateIndex << 1) + (hasWindowFocus ? 1 : 0);
|
|
|
|
drawableState = VIEW_STATE_SETS[viewStateIndex];
|
|
|
|
//noinspection ConstantIfStatement
|
|
if (false) {
|
|
Log.i("View", "drawableStateIndex=" + viewStateIndex);
|
|
Log.i("View", toString()
|
|
+ " pressed=" + ((privateFlags & PRESSED) != 0)
|
|
+ " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED)
|
|
+ " fo=" + hasFocus()
|
|
+ " sl=" + ((privateFlags & SELECTED) != 0)
|
|
+ " wf=" + hasWindowFocus
|
|
+ ": " + Arrays.toString(drawableState));
|
|
}
|
|
|
|
if (extraSpace == 0) {
|
|
return drawableState;
|
|
}
|
|
|
|
final int[] fullState;
|
|
if (drawableState != null) {
|
|
fullState = new int[drawableState.length + extraSpace];
|
|
System.arraycopy(drawableState, 0, fullState, 0, drawableState.length);
|
|
} else {
|
|
fullState = new int[extraSpace];
|
|
}
|
|
|
|
return fullState;
|
|
}
|
|
|
|
/**
|
|
* Merge your own state values in <var>additionalState</var> into the base
|
|
* state values <var>baseState</var> that were returned by
|
|
* {@link #onCreateDrawableState}.
|
|
*
|
|
* @param baseState The base state values returned by
|
|
* {@link #onCreateDrawableState}, which will be modified to also hold your
|
|
* own additional state values.
|
|
*
|
|
* @param additionalState The additional state values you would like
|
|
* added to <var>baseState</var>; this array is not modified.
|
|
*
|
|
* @return As a convenience, the <var>baseState</var> array you originally
|
|
* passed into the function is returned.
|
|
*
|
|
* @see #onCreateDrawableState
|
|
*/
|
|
protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) {
|
|
final int N = baseState.length;
|
|
int i = N - 1;
|
|
while (i >= 0 && baseState[i] == 0) {
|
|
i--;
|
|
}
|
|
System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length);
|
|
return baseState;
|
|
}
|
|
|
|
/**
|
|
* Sets the background color for this view.
|
|
* @param color the color of the background
|
|
*/
|
|
@RemotableViewMethod
|
|
public void setBackgroundColor(int color) {
|
|
setBackgroundDrawable(new ColorDrawable(color));
|
|
}
|
|
|
|
/**
|
|
* Set the background to a given resource. The resource should refer to
|
|
* a Drawable object or 0 to remove the background.
|
|
* @param resid The identifier of the resource.
|
|
* @attr ref android.R.styleable#View_background
|
|
*/
|
|
@RemotableViewMethod
|
|
public void setBackgroundResource(int resid) {
|
|
if (resid != 0 && resid == mBackgroundResource) {
|
|
return;
|
|
}
|
|
|
|
Drawable d= null;
|
|
if (resid != 0) {
|
|
d = mResources.getDrawable(resid);
|
|
}
|
|
setBackgroundDrawable(d);
|
|
|
|
mBackgroundResource = resid;
|
|
}
|
|
|
|
/**
|
|
* Set the background to a given Drawable, or remove the background. If the
|
|
* background has padding, this View's padding is set to the background's
|
|
* padding. However, when a background is removed, this View's padding isn't
|
|
* touched. If setting the padding is desired, please use
|
|
* {@link #setPadding(int, int, int, int)}.
|
|
*
|
|
* @param d The Drawable to use as the background, or null to remove the
|
|
* background
|
|
*/
|
|
public void setBackgroundDrawable(Drawable d) {
|
|
boolean requestLayout = false;
|
|
|
|
mBackgroundResource = 0;
|
|
|
|
/*
|
|
* Regardless of whether we're setting a new background or not, we want
|
|
* to clear the previous drawable.
|
|
*/
|
|
if (mBGDrawable != null) {
|
|
mBGDrawable.setCallback(null);
|
|
unscheduleDrawable(mBGDrawable);
|
|
}
|
|
|
|
if (d != null) {
|
|
Rect padding = sThreadLocal.get();
|
|
if (padding == null) {
|
|
padding = new Rect();
|
|
sThreadLocal.set(padding);
|
|
}
|
|
if (d.getPadding(padding)) {
|
|
setPadding(padding.left, padding.top, padding.right, padding.bottom);
|
|
}
|
|
|
|
// Compare the minimum sizes of the old Drawable and the new. If there isn't an old or
|
|
// if it has a different minimum size, we should layout again
|
|
if (mBGDrawable == null || mBGDrawable.getMinimumHeight() != d.getMinimumHeight() ||
|
|
mBGDrawable.getMinimumWidth() != d.getMinimumWidth()) {
|
|
requestLayout = true;
|
|
}
|
|
|
|
d.setCallback(this);
|
|
if (d.isStateful()) {
|
|
d.setState(getDrawableState());
|
|
}
|
|
d.setVisible(getVisibility() == VISIBLE, false);
|
|
mBGDrawable = d;
|
|
|
|
if ((mPrivateFlags & SKIP_DRAW) != 0) {
|
|
mPrivateFlags &= ~SKIP_DRAW;
|
|
mPrivateFlags |= ONLY_DRAWS_BACKGROUND;
|
|
requestLayout = true;
|
|
}
|
|
} else {
|
|
/* Remove the background */
|
|
mBGDrawable = null;
|
|
|
|
if ((mPrivateFlags & ONLY_DRAWS_BACKGROUND) != 0) {
|
|
/*
|
|
* This view ONLY drew the background before and we're removing
|
|
* the background, so now it won't draw anything
|
|
* (hence we SKIP_DRAW)
|
|
*/
|
|
mPrivateFlags &= ~ONLY_DRAWS_BACKGROUND;
|
|
mPrivateFlags |= SKIP_DRAW;
|
|
}
|
|
|
|
/*
|
|
* When the background is set, we try to apply its padding to this
|
|
* View. When the background is removed, we don't touch this View's
|
|
* padding. This is noted in the Javadocs. Hence, we don't need to
|
|
* requestLayout(), the invalidate() below is sufficient.
|
|
*/
|
|
|
|
// The old background's minimum size could have affected this
|
|
// View's layout, so let's requestLayout
|
|
requestLayout = true;
|
|
}
|
|
|
|
computeOpaqueFlags();
|
|
|
|
if (requestLayout) {
|
|
requestLayout();
|
|
}
|
|
|
|
mBackgroundSizeChanged = true;
|
|
invalidate();
|
|
}
|
|
|
|
/**
|
|
* Gets the background drawable
|
|
* @return The drawable used as the background for this view, if any.
|
|
*/
|
|
public Drawable getBackground() {
|
|
return mBGDrawable;
|
|
}
|
|
|
|
/**
|
|
* Sets the padding. The view may add on the space required to display
|
|
* the scrollbars, depending on the style and visibility of the scrollbars.
|
|
* So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop},
|
|
* {@link #getPaddingRight} and {@link #getPaddingBottom} may be different
|
|
* from the values set in this call.
|
|
*
|
|
* @attr ref android.R.styleable#View_padding
|
|
* @attr ref android.R.styleable#View_paddingBottom
|
|
* @attr ref android.R.styleable#View_paddingLeft
|
|
* @attr ref android.R.styleable#View_paddingRight
|
|
* @attr ref android.R.styleable#View_paddingTop
|
|
* @param left the left padding in pixels
|
|
* @param top the top padding in pixels
|
|
* @param right the right padding in pixels
|
|
* @param bottom the bottom padding in pixels
|
|
*/
|
|
public void setPadding(int left, int top, int right, int bottom) {
|
|
boolean changed = false;
|
|
|
|
mUserPaddingRight = right;
|
|
mUserPaddingBottom = bottom;
|
|
|
|
final int viewFlags = mViewFlags;
|
|
|
|
// Common case is there are no scroll bars.
|
|
if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) {
|
|
// TODO: Deal with RTL languages to adjust left padding instead of right.
|
|
if ((viewFlags & SCROLLBARS_VERTICAL) != 0) {
|
|
right += (viewFlags & SCROLLBARS_INSET_MASK) == 0
|
|
? 0 : getVerticalScrollbarWidth();
|
|
}
|
|
if ((viewFlags & SCROLLBARS_HORIZONTAL) == 0) {
|
|
bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0
|
|
? 0 : getHorizontalScrollbarHeight();
|
|
}
|
|
}
|
|
|
|
if (mPaddingLeft != left) {
|
|
changed = true;
|
|
mPaddingLeft = left;
|
|
}
|
|
if (mPaddingTop != top) {
|
|
changed = true;
|
|
mPaddingTop = top;
|
|
}
|
|
if (mPaddingRight != right) {
|
|
changed = true;
|
|
mPaddingRight = right;
|
|
}
|
|
if (mPaddingBottom != bottom) {
|
|
changed = true;
|
|
mPaddingBottom = bottom;
|
|
}
|
|
|
|
if (changed) {
|
|
requestLayout();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the top padding of this view.
|
|
*
|
|
* @return the top padding in pixels
|
|
*/
|
|
public int getPaddingTop() {
|
|
return mPaddingTop;
|
|
}
|
|
|
|
/**
|
|
* Returns the bottom padding of this view. If there are inset and enabled
|
|
* scrollbars, this value may include the space required to display the
|
|
* scrollbars as well.
|
|
*
|
|
* @return the bottom padding in pixels
|
|
*/
|
|
public int getPaddingBottom() {
|
|
return mPaddingBottom;
|
|
}
|
|
|
|
/**
|
|
* Returns the left padding of this view. If there are inset and enabled
|
|
* scrollbars, this value may include the space required to display the
|
|
* scrollbars as well.
|
|
*
|
|
* @return the left padding in pixels
|
|
*/
|
|
public int getPaddingLeft() {
|
|
return mPaddingLeft;
|
|
}
|
|
|
|
/**
|
|
* Returns the right padding of this view. If there are inset and enabled
|
|
* scrollbars, this value may include the space required to display the
|
|
* scrollbars as well.
|
|
*
|
|
* @return the right padding in pixels
|
|
*/
|
|
public int getPaddingRight() {
|
|
return mPaddingRight;
|
|
}
|
|
|
|
/**
|
|
* Changes the selection state of this view. A view can be selected or not.
|
|
* Note that selection is not the same as focus. Views are typically
|
|
* selected in the context of an AdapterView like ListView or GridView;
|
|
* the selected view is the view that is highlighted.
|
|
*
|
|
* @param selected true if the view must be selected, false otherwise
|
|
*/
|
|
public void setSelected(boolean selected) {
|
|
if (((mPrivateFlags & SELECTED) != 0) != selected) {
|
|
mPrivateFlags = (mPrivateFlags & ~SELECTED) | (selected ? SELECTED : 0);
|
|
if (!selected) resetPressedState();
|
|
invalidate();
|
|
refreshDrawableState();
|
|
dispatchSetSelected(selected);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Dispatch setSelected to all of this View's children.
|
|
*
|
|
* @see #setSelected(boolean)
|
|
*
|
|
* @param selected The new selected state
|
|
*/
|
|
protected void dispatchSetSelected(boolean selected) {
|
|
}
|
|
|
|
/**
|
|
* Indicates the selection state of this view.
|
|
*
|
|
* @return true if the view is selected, false otherwise
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public boolean isSelected() {
|
|
return (mPrivateFlags & SELECTED) != 0;
|
|
}
|
|
|
|
/**
|
|
* Returns the ViewTreeObserver for this view's hierarchy. The view tree
|
|
* observer can be used to get notifications when global events, like
|
|
* layout, happen.
|
|
*
|
|
* The returned ViewTreeObserver observer is not guaranteed to remain
|
|
* valid for the lifetime of this View. If the caller of this method keeps
|
|
* a long-lived reference to ViewTreeObserver, it should always check for
|
|
* the return value of {@link ViewTreeObserver#isAlive()}.
|
|
*
|
|
* @return The ViewTreeObserver for this view's hierarchy.
|
|
*/
|
|
public ViewTreeObserver getViewTreeObserver() {
|
|
if (mAttachInfo != null) {
|
|
return mAttachInfo.mTreeObserver;
|
|
}
|
|
if (mFloatingTreeObserver == null) {
|
|
mFloatingTreeObserver = new ViewTreeObserver();
|
|
}
|
|
return mFloatingTreeObserver;
|
|
}
|
|
|
|
/**
|
|
* <p>Finds the topmost view in the current view hierarchy.</p>
|
|
*
|
|
* @return the topmost view containing this view
|
|
*/
|
|
public View getRootView() {
|
|
if (mAttachInfo != null) {
|
|
final View v = mAttachInfo.mRootView;
|
|
if (v != null) {
|
|
return v;
|
|
}
|
|
}
|
|
|
|
View parent = this;
|
|
|
|
while (parent.mParent != null && parent.mParent instanceof View) {
|
|
parent = (View) parent.mParent;
|
|
}
|
|
|
|
return parent;
|
|
}
|
|
|
|
/**
|
|
* <p>Computes the coordinates of this view on the screen. The argument
|
|
* must be an array of two integers. After the method returns, the array
|
|
* contains the x and y location in that order.</p>
|
|
*
|
|
* @param location an array of two integers in which to hold the coordinates
|
|
*/
|
|
public void getLocationOnScreen(int[] location) {
|
|
getLocationInWindow(location);
|
|
|
|
final AttachInfo info = mAttachInfo;
|
|
if (info != null) {
|
|
location[0] += info.mWindowLeft;
|
|
location[1] += info.mWindowTop;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Computes the coordinates of this view in its window. The argument
|
|
* must be an array of two integers. After the method returns, the array
|
|
* contains the x and y location in that order.</p>
|
|
*
|
|
* @param location an array of two integers in which to hold the coordinates
|
|
*/
|
|
public void getLocationInWindow(int[] location) {
|
|
if (location == null || location.length < 2) {
|
|
throw new IllegalArgumentException("location must be an array of "
|
|
+ "two integers");
|
|
}
|
|
|
|
location[0] = mLeft;
|
|
location[1] = mTop;
|
|
|
|
ViewParent viewParent = mParent;
|
|
while (viewParent instanceof View) {
|
|
final View view = (View)viewParent;
|
|
location[0] += view.mLeft - view.mScrollX;
|
|
location[1] += view.mTop - view.mScrollY;
|
|
viewParent = view.mParent;
|
|
}
|
|
|
|
if (viewParent instanceof ViewRoot) {
|
|
// *cough*
|
|
final ViewRoot vr = (ViewRoot)viewParent;
|
|
location[1] -= vr.mCurScrollY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@hide}
|
|
* @param id the id of the view to be found
|
|
* @return the view of the specified id, null if cannot be found
|
|
*/
|
|
protected View findViewTraversal(int id) {
|
|
if (id == mID) {
|
|
return this;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* {@hide}
|
|
* @param tag the tag of the view to be found
|
|
* @return the view of specified tag, null if cannot be found
|
|
*/
|
|
protected View findViewWithTagTraversal(Object tag) {
|
|
if (tag != null && tag.equals(mTag)) {
|
|
return this;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Look for a child view with the given id. If this view has the given
|
|
* id, return this view.
|
|
*
|
|
* @param id The id to search for.
|
|
* @return The view that has the given id in the hierarchy or null
|
|
*/
|
|
public final View findViewById(int id) {
|
|
if (id < 0) {
|
|
return null;
|
|
}
|
|
return findViewTraversal(id);
|
|
}
|
|
|
|
/**
|
|
* Look for a child view with the given tag. If this view has the given
|
|
* tag, return this view.
|
|
*
|
|
* @param tag The tag to search for, using "tag.equals(getTag())".
|
|
* @return The View that has the given tag in the hierarchy or null
|
|
*/
|
|
public final View findViewWithTag(Object tag) {
|
|
if (tag == null) {
|
|
return null;
|
|
}
|
|
return findViewWithTagTraversal(tag);
|
|
}
|
|
|
|
/**
|
|
* Sets the identifier for this view. The identifier does not have to be
|
|
* unique in this view's hierarchy. The identifier should be a positive
|
|
* number.
|
|
*
|
|
* @see #NO_ID
|
|
* @see #getId
|
|
* @see #findViewById
|
|
*
|
|
* @param id a number used to identify the view
|
|
*
|
|
* @attr ref android.R.styleable#View_id
|
|
*/
|
|
public void setId(int id) {
|
|
mID = id;
|
|
}
|
|
|
|
/**
|
|
* {@hide}
|
|
*
|
|
* @param isRoot true if the view belongs to the root namespace, false
|
|
* otherwise
|
|
*/
|
|
public void setIsRootNamespace(boolean isRoot) {
|
|
if (isRoot) {
|
|
mPrivateFlags |= IS_ROOT_NAMESPACE;
|
|
} else {
|
|
mPrivateFlags &= ~IS_ROOT_NAMESPACE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@hide}
|
|
*
|
|
* @return true if the view belongs to the root namespace, false otherwise
|
|
*/
|
|
public boolean isRootNamespace() {
|
|
return (mPrivateFlags&IS_ROOT_NAMESPACE) != 0;
|
|
}
|
|
|
|
/**
|
|
* Returns this view's identifier.
|
|
*
|
|
* @return a positive integer used to identify the view or {@link #NO_ID}
|
|
* if the view has no ID
|
|
*
|
|
* @see #setId
|
|
* @see #findViewById
|
|
* @attr ref android.R.styleable#View_id
|
|
*/
|
|
@ViewDebug.CapturedViewProperty
|
|
public int getId() {
|
|
return mID;
|
|
}
|
|
|
|
/**
|
|
* Returns this view's tag.
|
|
*
|
|
* @return the Object stored in this view as a tag
|
|
*
|
|
* @see #setTag(Object)
|
|
* @see #getTag(int)
|
|
*/
|
|
@ViewDebug.ExportedProperty
|
|
public Object getTag() {
|
|
return mTag;
|
|
}
|
|
|
|
/**
|
|
* Sets the tag associated with this view. A tag can be used to mark
|
|
* a view in its hierarchy and does not have to be unique within the
|
|
* hierarchy. Tags can also be used to store data within a view without
|
|
* resorting to another data structure.
|
|
*
|
|
* @param tag an Object to tag the view with
|
|
*
|
|
* @see #getTag()
|
|
* @see #setTag(int, Object)
|
|
*/
|
|
public void setTag(final Object tag) {
|
|
mTag = tag;
|
|
}
|
|
|
|
/**
|
|
* Returns the tag associated with this view and the specified key.
|
|
*
|
|
* @param key The key identifying the tag
|
|
*
|
|
* @return the Object stored in this view as a tag
|
|
*
|
|
* @see #setTag(int, Object)
|
|
* @see #getTag()
|
|
*/
|
|
public Object getTag(int key) {
|
|
SparseArray<Object> tags = null;
|
|
synchronized (sTagsLock) {
|
|
if (sTags != null) {
|
|
tags = sTags.get(this);
|
|
}
|
|
}
|
|
|
|
if (tags != null) return tags.get(key);
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Sets a tag associated with this view and a key. A tag can be used
|
|
* to mark a view in its hierarchy and does not have to be unique within
|
|
* the hierarchy. Tags can also be used to store data within a view
|
|
* without resorting to another data structure.
|
|
*
|
|
* The specified key should be an id declared in the resources of the
|
|
* application to ensure it is unique (see the <a
|
|
* href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>).
|
|
* Keys identified as belonging to
|
|
* the Android framework or not associated with any package will cause
|
|
* an {@link IllegalArgumentException} to be thrown.
|
|
*
|
|
* @param key The key identifying the tag
|
|
* @param tag An Object to tag the view with
|
|
*
|
|
* @throws IllegalArgumentException If they specified key is not valid
|
|
*
|
|
* @see #setTag(Object)
|
|
* @see #getTag(int)
|
|
*/
|
|
public void setTag(int key, final Object tag) {
|
|
// If the package id is 0x00 or 0x01, it's either an undefined package
|
|
// or a framework id
|
|
if ((key >>> 24) < 2) {
|
|
throw new IllegalArgumentException("The key must be an application-specific "
|
|
+ "resource id.");
|
|
}
|
|
|
|
setTagInternal(this, key, tag);
|
|
}
|
|
|
|
/**
|
|
* Variation of {@link #setTag(int, Object)} that enforces the key to be a
|
|
* framework id.
|
|
*
|
|
* @hide
|
|
*/
|
|
public void setTagInternal(int key, Object tag) {
|
|
if ((key >>> 24) != 0x1) {
|
|
throw new IllegalArgumentException("The key must be a framework-specific "
|
|
+ "resource id.");
|
|
}
|
|
|
|
setTagInternal(this, key, tag);
|
|
}
|
|
|
|
private static void setTagInternal(View view, int key, Object tag) {
|
|
SparseArray<Object> tags = null;
|
|
synchronized (sTagsLock) {
|
|
if (sTags == null) {
|
|
sTags = new WeakHashMap<View, SparseArray<Object>>();
|
|
} else {
|
|
tags = sTags.get(view);
|
|
}
|
|
}
|
|
|
|
if (tags == null) {
|
|
tags = new SparseArray<Object>(2);
|
|
synchronized (sTagsLock) {
|
|
sTags.put(view, tags);
|
|
}
|
|
}
|
|
|
|
tags.put(key, tag);
|
|
}
|
|
|
|
/**
|
|
* @param consistency The type of consistency. See ViewDebug for more information.
|
|
*
|
|
* @hide
|
|
*/
|
|
protected boolean dispatchConsistencyCheck(int consistency) {
|
|
return onConsistencyCheck(consistency);
|
|
}
|
|
|
|
/**
|
|
* Method that subclasses should implement to check their consistency. The type of
|
|
* consistency check is indicated by the bit field passed as a parameter.
|
|
*
|
|
* @param consistency The type of consistency. See ViewDebug for more information.
|
|
*
|
|
* @throws IllegalStateException if the view is in an inconsistent state.
|
|
*
|
|
* @hide
|
|
*/
|
|
protected boolean onConsistencyCheck(int consistency) {
|
|
boolean result = true;
|
|
|
|
final boolean checkLayout = (consistency & ViewDebug.CONSISTENCY_LAYOUT) != 0;
|
|
final boolean checkDrawing = (consistency & ViewDebug.CONSISTENCY_DRAWING) != 0;
|
|
|
|
if (checkLayout) {
|
|
if (getParent() == null) {
|
|
result = false;
|
|
android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG,
|
|
"View " + this + " does not have a parent.");
|
|
}
|
|
|
|
if (mAttachInfo == null) {
|
|
result = false;
|
|
android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG,
|
|
"View " + this + " is not attached to a window.");
|
|
}
|
|
}
|
|
|
|
if (checkDrawing) {
|
|
// Do not check the DIRTY/DRAWN flags because views can call invalidate()
|
|
// from their draw() method
|
|
|
|
if ((mPrivateFlags & DRAWN) != DRAWN &&
|
|
(mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID) {
|
|
result = false;
|
|
android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG,
|
|
"View " + this + " was invalidated but its drawing cache is valid.");
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Prints information about this view in the log output, with the tag
|
|
* {@link #VIEW_LOG_TAG}.
|
|
*
|
|
* @hide
|
|
*/
|
|
public void debug() {
|
|
debug(0);
|
|
}
|
|
|
|
/**
|
|
* Prints information about this view in the log output, with the tag
|
|
* {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an
|
|
* indentation defined by the <code>depth</code>.
|
|
*
|
|
* @param depth the indentation level
|
|
*
|
|
* @hide
|
|
*/
|
|
protected void debug(int depth) {
|
|
String output = debugIndent(depth - 1);
|
|
|
|
output += "+ " + this;
|
|
int id = getId();
|
|
if (id != -1) {
|
|
output += " (id=" + id + ")";
|
|
}
|
|
Object tag = getTag();
|
|
if (tag != null) {
|
|
output += " (tag=" + tag + ")";
|
|
}
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
|
|
if ((mPrivateFlags & FOCUSED) != 0) {
|
|
output = debugIndent(depth) + " FOCUSED";
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
}
|
|
|
|
output = debugIndent(depth);
|
|
output += "frame={" + mLeft + ", " + mTop + ", " + mRight
|
|
+ ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY
|
|
+ "} ";
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
|
|
if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0
|
|
|| mPaddingBottom != 0) {
|
|
output = debugIndent(depth);
|
|
output += "padding={" + mPaddingLeft + ", " + mPaddingTop
|
|
+ ", " + mPaddingRight + ", " + mPaddingBottom + "}";
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
}
|
|
|
|
output = debugIndent(depth);
|
|
output += "mMeasureWidth=" + mMeasuredWidth +
|
|
" mMeasureHeight=" + mMeasuredHeight;
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
|
|
output = debugIndent(depth);
|
|
if (mLayoutParams == null) {
|
|
output += "BAD! no layout params";
|
|
} else {
|
|
output = mLayoutParams.debug(output);
|
|
}
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
|
|
output = debugIndent(depth);
|
|
output += "flags={";
|
|
output += View.printFlags(mViewFlags);
|
|
output += "}";
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
|
|
output = debugIndent(depth);
|
|
output += "privateFlags={";
|
|
output += View.printPrivateFlags(mPrivateFlags);
|
|
output += "}";
|
|
Log.d(VIEW_LOG_TAG, output);
|
|
}
|
|
|
|
/**
|
|
* Creates an string of whitespaces used for indentation.
|
|
*
|
|
* @param depth the indentation level
|
|
* @return a String containing (depth * 2 + 3) * 2 white spaces
|
|
*
|
|
* @hide
|
|
*/
|
|
protected static String debugIndent(int depth) {
|
|
StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2);
|
|
for (int i = 0; i < (depth * 2) + 3; i++) {
|
|
spaces.append(' ').append(' ');
|
|
}
|
|
return spaces.toString();
|
|
}
|
|
|
|
/**
|
|
* <p>Return the offset of the widget's text baseline from the widget's top
|
|
* boundary. If this widget does not support baseline alignment, this
|
|
* method returns -1. </p>
|
|
*
|
|
* @return the offset of the baseline within the widget's bounds or -1
|
|
* if baseline alignment is not supported
|
|
*/
|
|
@ViewDebug.ExportedProperty(category = "layout")
|
|
public int getBaseline() {
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Call this when something has changed which has invalidated the
|
|
* layout of this view. This will schedule a layout pass of the view
|
|
* tree.
|
|
*/
|
|
public void requestLayout() {
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.REQUEST_LAYOUT);
|
|
}
|
|
|
|
mPrivateFlags |= FORCE_LAYOUT;
|
|
|
|
if (mParent != null && !mParent.isLayoutRequested()) {
|
|
mParent.requestLayout();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Forces this view to be laid out during the next layout pass.
|
|
* This method does not call requestLayout() or forceLayout()
|
|
* on the parent.
|
|
*/
|
|
public void forceLayout() {
|
|
mPrivateFlags |= FORCE_LAYOUT;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* This is called to find out how big a view should be. The parent
|
|
* supplies constraint information in the width and height parameters.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* The actual mesurement work of a view is performed in
|
|
* {@link #onMeasure(int, int)}, called by this method. Therefore, only
|
|
* {@link #onMeasure(int, int)} can and must be overriden by subclasses.
|
|
* </p>
|
|
*
|
|
*
|
|
* @param widthMeasureSpec Horizontal space requirements as imposed by the
|
|
* parent
|
|
* @param heightMeasureSpec Vertical space requirements as imposed by the
|
|
* parent
|
|
*
|
|
* @see #onMeasure(int, int)
|
|
*/
|
|
public final void measure(int widthMeasureSpec, int heightMeasureSpec) {
|
|
if ((mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT ||
|
|
widthMeasureSpec != mOldWidthMeasureSpec ||
|
|
heightMeasureSpec != mOldHeightMeasureSpec) {
|
|
|
|
// first clears the measured dimension flag
|
|
mPrivateFlags &= ~MEASURED_DIMENSION_SET;
|
|
|
|
if (ViewDebug.TRACE_HIERARCHY) {
|
|
ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_MEASURE);
|
|
}
|
|
|
|
// measure ourselves, this should set the measured dimension flag back
|
|
onMeasure(widthMeasureSpec, heightMeasureSpec);
|
|
|
|
// flag not set, setMeasuredDimension() was not invoked, we raise
|
|
// an exception to warn the developer
|
|
if ((mPrivateFlags & MEASURED_DIMENSION_SET) != MEASURED_DIMENSION_SET) {
|
|
throw new IllegalStateException("onMeasure() did not set the"
|
|
+ " measured dimension by calling"
|
|
+ " setMeasuredDimension()");
|
|
}
|
|
|
|
mPrivateFlags |= LAYOUT_REQUIRED;
|
|
}
|
|
|
|
mOldWidthMeasureSpec = widthMeasureSpec;
|
|
mOldHeightMeasureSpec = heightMeasureSpec;
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Measure the view and its content to determine the measured width and the
|
|
* measured height. This method is invoked by {@link #measure(int, int)} and
|
|
* should be overriden by subclasses to provide accurate and efficient
|
|
* measurement of their contents.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* <strong>CONTRACT:</strong> When overriding this method, you
|
|
* <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the
|
|
* measured width and height of this view. Failure to do so will trigger an
|
|
* <code>IllegalStateException</code>, thrown by
|
|
* {@link #measure(int, int)}. Calling the superclass'
|
|
* {@link #onMeasure(int, int)} is a valid use.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* The base class implementation of measure defaults to the background size,
|
|
* unless a larger size is allowed by the MeasureSpec. Subclasses should
|
|
* override {@link #onMeasure(int, int)} to provide better measurements of
|
|
* their content.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* If this method is overridden, it is the subclass's responsibility to make
|
|
* sure the measured height and width are at least the view's minimum height
|
|
* and width ({@link #getSuggestedMinimumHeight()} and
|
|
* {@link #getSuggestedMinimumWidth()}).
|
|
* </p>
|
|
*
|
|
* @param widthMeasureSpec horizontal space requirements as imposed by the parent.
|
|
* The requirements are encoded with
|
|
* {@link android.view.View.MeasureSpec}.
|
|
* @param heightMeasureSpec vertical space requirements as imposed by the parent.
|
|
* The requirements are encoded with
|
|
* {@link android.view.View.MeasureSpec}.
|
|
*
|
|
* @see #getMeasuredWidth()
|
|
* @see #getMeasuredHeight()
|
|
* @see #setMeasuredDimension(int, int)
|
|
* @see #getSuggestedMinimumHeight()
|
|
* @see #getSuggestedMinimumWidth()
|
|
* @see android.view.View.MeasureSpec#getMode(int)
|
|
* @see android.view.View.MeasureSpec#getSize(int)
|
|
*/
|
|
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
|
setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec),
|
|
getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec));
|
|
}
|
|
|
|
/**
|
|
* <p>This mehod must be called by {@link #onMeasure(int, int)} to store the
|
|
* measured width and measured height. Failing to do so will trigger an
|
|
* exception at measurement time.</p>
|
|
*
|
|
* @param measuredWidth the measured width of this view
|
|
* @param measuredHeight the measured height of this view
|
|
*/
|
|
protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) {
|
|
mMeasuredWidth = measuredWidth;
|
|
mMeasuredHeight = measuredHeight;
|
|
|
|
mPrivateFlags |= MEASURED_DIMENSION_SET;
|
|
}
|
|
|
|
/**
|
|
* Utility to reconcile a desired size with constraints imposed by a MeasureSpec.
|
|
* Will take the desired size, unless a different size is imposed by the constraints.
|
|
*
|
|
* @param size How big the view wants to be
|
|
* @param measureSpec Constraints imposed by the parent
|
|
* @return The size this view should be.
|
|
*/
|
|
public static int resolveSize(int size, int measureSpec) {
|
|
int result = size;
|
|
int specMode = MeasureSpec.getMode(measureSpec);
|
|
int specSize = MeasureSpec.getSize(measureSpec);
|
|
switch (specMode) {
|
|
case MeasureSpec.UNSPECIFIED:
|
|
result = size;
|
|
break;
|
|
case MeasureSpec.AT_MOST:
|
|
result = Math.min(size, specSize);
|
|
break;
|
|
case MeasureSpec.EXACTLY:
|
|
result = specSize;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Utility to return a default size. Uses the supplied size if the
|
|
* MeasureSpec imposed no contraints. Will get larger if allowed
|
|
* by the MeasureSpec.
|
|
*
|
|
* @param size Default size for this view
|
|
* @param measureSpec Constraints imposed by the parent
|
|
* @return The size this view should be.
|
|
*/
|
|
public static int getDefaultSize(int size, int measureSpec) {
|
|
int result = size;
|
|
int specMode = MeasureSpec.getMode(measureSpec);
|
|
int specSize = MeasureSpec.getSize(measureSpec);
|
|
|
|
switch (specMode) {
|
|
case MeasureSpec.UNSPECIFIED:
|
|
result = size;
|
|
break;
|
|
case MeasureSpec.AT_MOST:
|
|
case MeasureSpec.EXACTLY:
|
|
result = specSize;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Returns the suggested minimum height that the view should use. This
|
|
* returns the maximum of the view's minimum height
|
|
* and the background's minimum height
|
|
* ({@link android.graphics.drawable.Drawable#getMinimumHeight()}).
|
|
* <p>
|
|
* When being used in {@link #onMeasure(int, int)}, the caller should still
|
|
* ensure the returned height is within the requirements of the parent.
|
|
*
|
|
* @return The suggested minimum height of the view.
|
|
*/
|
|
protected int getSuggestedMinimumHeight() {
|
|
int suggestedMinHeight = mMinHeight;
|
|
|
|
if (mBGDrawable != null) {
|
|
final int bgMinHeight = mBGDrawable.getMinimumHeight();
|
|
if (suggestedMinHeight < bgMinHeight) {
|
|
suggestedMinHeight = bgMinHeight;
|
|
}
|
|
}
|
|
|
|
return suggestedMinHeight;
|
|
}
|
|
|
|
/**
|
|
* Returns the suggested minimum width that the view should use. This
|
|
* returns the maximum of the view's minimum width)
|
|
* and the background's minimum width
|
|
* ({@link android.graphics.drawable.Drawable#getMinimumWidth()}).
|
|
* <p>
|
|
* When being used in {@link #onMeasure(int, int)}, the caller should still
|
|
* ensure the returned width is within the requirements of the parent.
|
|
*
|
|
* @return The suggested minimum width of the view.
|
|
*/
|
|
protected int getSuggestedMinimumWidth() {
|
|
int suggestedMinWidth = mMinWidth;
|
|
|
|
if (mBGDrawable != null) {
|
|
final int bgMinWidth = mBGDrawable.getMinimumWidth();
|
|
if (suggestedMinWidth < bgMinWidth) {
|
|
suggestedMinWidth = bgMinWidth;
|
|
}
|
|
}
|
|
|
|
return suggestedMinWidth;
|
|
}
|
|
|
|
/**
|
|
* Sets the minimum height of the view. It is not guaranteed the view will
|
|
* be able to achieve this minimum height (for example, if its parent layout
|
|
* constrains it with less available height).
|
|
*
|
|
* @param minHeight The minimum height the view will try to be.
|
|
*/
|
|
public void setMinimumHeight(int minHeight) {
|
|
mMinHeight = minHeight;
|
|
}
|
|
|
|
/**
|
|
* Sets the minimum width of the view. It is not guaranteed the view will
|
|
* be able to achieve this minimum width (for example, if its parent layout
|
|
* constrains it with less available width).
|
|
*
|
|
* @param minWidth The minimum width the view will try to be.
|
|
*/
|
|
public void setMinimumWidth(int minWidth) {
|
|
mMinWidth = minWidth;
|
|
}
|
|
|
|
/**
|
|
* Get the animation currently associated with this view.
|
|
*
|
|
* @return The animation that is currently playing or
|
|
* scheduled to play for this view.
|
|
*/
|
|
public Animation getAnimation() {
|
|
return mCurrentAnimation;
|
|
}
|
|
|
|
/**
|
|
* Start the specified animation now.
|
|
*
|
|
* @param animation the animation to start now
|
|
*/
|
|
public void startAnimation(Animation animation) {
|
|
animation.setStartTime(Animation.START_ON_FIRST_FRAME);
|
|
setAnimation(animation);
|
|
invalidate();
|
|
}
|
|
|
|
/**
|
|
* Cancels any animations for this view.
|
|
*/
|
|
public void clearAnimation() {
|
|
if (mCurrentAnimation != null) {
|
|
mCurrentAnimation.detach();
|
|
}
|
|
mCurrentAnimation = null;
|
|
}
|
|
|
|
/**
|
|
* Sets the next animation to play for this view.
|
|
* If you want the animation to play immediately, use
|
|
* startAnimation. This method provides allows fine-grained
|
|
* control over the start time and invalidation, but you
|
|
* must make sure that 1) the animation has a start time set, and
|
|
* 2) the view will be invalidated when the animation is supposed to
|
|
* start.
|
|
*
|
|
* @param animation The next animation, or null.
|
|
*/
|
|
public void setAnimation(Animation animation) {
|
|
mCurrentAnimation = animation;
|
|
if (animation != null) {
|
|
animation.reset();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Invoked by a parent ViewGroup to notify the start of the animation
|
|
* currently associated with this view. If you override this method,
|
|
* always call super.onAnimationStart();
|
|
*
|
|
* @see #setAnimation(android.view.animation.Animation)
|
|
* @see #getAnimation()
|
|
*/
|
|
protected void onAnimationStart() {
|
|
mPrivateFlags |= ANIMATION_STARTED;
|
|
}
|
|
|
|
/**
|
|
* Invoked by a parent ViewGroup to notify the end of the animation
|
|
* currently associated with this view. If you override this method,
|
|
* always call super.onAnimationEnd();
|
|
*
|
|
* @see #setAnimation(android.view.animation.Animation)
|
|
* @see #getAnimation()
|
|
*/
|
|
protected void onAnimationEnd() {
|
|
mPrivateFlags &= ~ANIMATION_STARTED;
|
|
}
|
|
|
|
/**
|
|
* Invoked if there is a Transform that involves alpha. Subclass that can
|
|
* draw themselves with the specified alpha should return true, and then
|
|
* respect that alpha when their onDraw() is called. If this returns false
|
|
* then the view may be redirected to draw into an offscreen buffer to
|
|
* fulfill the request, which will look fine, but may be slower than if the
|
|
* subclass handles it internally. The default implementation returns false.
|
|
*
|
|
* @param alpha The alpha (0..255) to apply to the view's drawing
|
|
* @return true if the view can draw with the specified alpha.
|
|
*/
|
|
protected boolean onSetAlpha(int alpha) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* This is used by the RootView to perform an optimization when
|
|
* the view hierarchy contains one or several SurfaceView.
|
|
* SurfaceView is always considered transparent, but its children are not,
|
|
* therefore all View objects remove themselves from the global transparent
|
|
* region (passed as a parameter to this function).
|
|
*
|
|
* @param region The transparent region for this ViewRoot (window).
|
|
*
|
|
* @return Returns true if the effective visibility of the view at this
|
|
* point is opaque, regardless of the transparent region; returns false
|
|
* if it is possible for underlying windows to be seen behind the view.
|
|
*
|
|
* {@hide}
|
|
*/
|
|
public boolean gatherTransparentRegion(Region region) {
|
|
final AttachInfo attachInfo = mAttachInfo;
|
|
if (region != null && attachInfo != null) {
|
|
final int pflags = mPrivateFlags;
|
|
if ((pflags & SKIP_DRAW) == 0) {
|
|
// The SKIP_DRAW flag IS NOT set, so this view draws. We need to
|
|
// remove it from the transparent region.
|
|
final int[] location = attachInfo.mTransparentLocation;
|
|
getLocationInWindow(location);
|
|
region.op(location[0], location[1], location[0] + mRight - mLeft,
|
|
location[1] + mBottom - mTop, Region.Op.DIFFERENCE);
|
|
} else if ((pflags & ONLY_DRAWS_BACKGROUND) != 0 && mBGDrawable != null) {
|
|
// The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable
|
|
// exists, so we remove the background drawable's non-transparent
|
|
// parts from this transparent region.
|
|
applyDrawableToTransparentRegion(mBGDrawable, region);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Play a sound effect for this view.
|
|
*
|
|
* <p>The framework will play sound effects for some built in actions, such as
|
|
* clicking, but you may wish to play these effects in your widget,
|
|
* for instance, for internal navigation.
|
|
*
|
|
* <p>The sound effect will only be played if sound effects are enabled by the user, and
|
|
* {@link #isSoundEffectsEnabled()} is true.
|
|
*
|
|
* @param soundConstant One of the constants defined in {@link SoundEffectConstants}
|
|
*/
|
|
public void playSoundEffect(int soundConstant) {
|
|
if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) {
|
|
return;
|
|
}
|
|
mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant);
|
|
}
|
|
|
|
/**
|
|
* BZZZTT!!1!
|
|
*
|
|
* <p>Provide haptic feedback to the user for this view.
|
|
*
|
|
* <p>The framework will provide haptic feedback for some built in actions,
|
|
* such as long presses, but you may wish to provide feedback for your
|
|
* own widget.
|
|
*
|
|
* <p>The feedback will only be performed if
|
|
* {@link #isHapticFeedbackEnabled()} is true.
|
|
*
|
|
* @param feedbackConstant One of the constants defined in
|
|
* {@link HapticFeedbackConstants}
|
|
*/
|
|
public boolean performHapticFeedback(int feedbackConstant) {
|
|
return performHapticFeedback(feedbackConstant, 0);
|
|
}
|
|
|
|
/**
|
|
* BZZZTT!!1!
|
|
*
|
|
* <p>Like {@link #performHapticFeedback(int)}, with additional options.
|
|
*
|
|
* @param feedbackConstant One of the constants defined in
|
|
* {@link HapticFeedbackConstants}
|
|
* @param flags Additional flags as per {@link HapticFeedbackConstants}.
|
|
*/
|
|
public boolean performHapticFeedback(int feedbackConstant, int flags) {
|
|
if (mAttachInfo == null) {
|
|
return false;
|
|
}
|
|
if ((flags&HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0
|
|
&& !isHapticFeedbackEnabled()) {
|
|
return false;
|
|
}
|
|
return mAttachInfo.mRootCallbacks.performHapticFeedback(
|
|
feedbackConstant,
|
|
(flags&HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0);
|
|
}
|
|
|
|
/**
|
|
* This needs to be a better API (NOT ON VIEW) before it is exposed. If
|
|
* it is ever exposed at all.
|
|
* @hide
|
|
*/
|
|
public void onCloseSystemDialogs(String reason) {
|
|
}
|
|
|
|
/**
|
|
* Given a Drawable whose bounds have been set to draw into this view,
|
|
* update a Region being computed for {@link #gatherTransparentRegion} so
|
|
* that any non-transparent parts of the Drawable are removed from the
|
|
* given transparent region.
|
|
*
|
|
* @param dr The Drawable whose transparency is to be applied to the region.
|
|
* @param region A Region holding the current transparency information,
|
|
* where any parts of the region that are set are considered to be
|
|
* transparent. On return, this region will be modified to have the
|
|
* transparency information reduced by the corresponding parts of the
|
|
* Drawable that are not transparent.
|
|
* {@hide}
|
|
*/
|
|
public void applyDrawableToTransparentRegion(Drawable dr, Region region) {
|
|
if (DBG) {
|
|
Log.i("View", "Getting transparent region for: " + this);
|
|
}
|
|
final Region r = dr.getTransparentRegion();
|
|
final Rect db = dr.getBounds();
|
|
final AttachInfo attachInfo = mAttachInfo;
|
|
if (r != null && attachInfo != null) {
|
|
final int w = getRight()-getLeft();
|
|
final int h = getBottom()-getTop();
|
|
if (db.left > 0) {
|
|
//Log.i("VIEW", "Drawable left " + db.left + " > view 0");
|
|
r.op(0, 0, db.left, h, Region.Op.UNION);
|
|
}
|
|
if (db.right < w) {
|
|
//Log.i("VIEW", "Drawable right " + db.right + " < view " + w);
|
|
r.op(db.right, 0, w, h, Region.Op.UNION);
|
|
}
|
|
if (db.top > 0) {
|
|
//Log.i("VIEW", "Drawable top " + db.top + " > view 0");
|
|
r.op(0, 0, w, db.top, Region.Op.UNION);
|
|
}
|
|
if (db.bottom < h) {
|
|
//Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h);
|
|
r.op(0, db.bottom, w, h, Region.Op.UNION);
|
|
}
|
|
final int[] location = attachInfo.mTransparentLocation;
|
|
getLocationInWindow(location);
|
|
r.translate(location[0], location[1]);
|
|
region.op(r, Region.Op.INTERSECT);
|
|
} else {
|
|
region.op(db, Region.Op.DIFFERENCE);
|
|
}
|
|
}
|
|
|
|
private void postCheckForLongClick(int delayOffset) {
|
|
mHasPerformedLongPress = false;
|
|
|
|
if (mPendingCheckForLongPress == null) {
|
|
mPendingCheckForLongPress = new CheckForLongPress();
|
|
}
|
|
mPendingCheckForLongPress.rememberWindowAttachCount();
|
|
postDelayed(mPendingCheckForLongPress,
|
|
ViewConfiguration.getLongPressTimeout() - delayOffset);
|
|
}
|
|
|
|
private static int[] stateSetUnion(final int[] stateSet1,
|
|
final int[] stateSet2) {
|
|
final int stateSet1Length = stateSet1.length;
|
|
final int stateSet2Length = stateSet2.length;
|
|
final int[] newSet = new int[stateSet1Length + stateSet2Length];
|
|
int k = 0;
|
|
int i = 0;
|
|
int j = 0;
|
|
// This is a merge of the two input state sets and assumes that the
|
|
// input sets are sorted by the order imposed by ViewDrawableStates.
|
|
for (int viewState : R.styleable.ViewDrawableStates) {
|
|
if (i < stateSet1Length && stateSet1[i] == viewState) {
|
|
newSet[k++] = viewState;
|
|
i++;
|
|
} else if (j < stateSet2Length && stateSet2[j] == viewState) {
|
|
newSet[k++] = viewState;
|
|
j++;
|
|
}
|
|
if (k > 1) {
|
|
assert(newSet[k - 1] > newSet[k - 2]);
|
|
}
|
|
}
|
|
return newSet;
|
|
}
|
|
|
|
/**
|
|
* Inflate a view from an XML resource. This convenience method wraps the {@link
|
|
* LayoutInflater} class, which provides a full range of options for view inflation.
|
|
*
|
|
* @param context The Context object for your activity or application.
|
|
* @param resource The resource ID to inflate
|
|
* @param root A view group that will be the parent. Used to properly inflate the
|
|
* layout_* parameters.
|
|
* @see LayoutInflater
|
|
*/
|
|
public static View inflate(Context context, int resource, ViewGroup root) {
|
|
LayoutInflater factory = LayoutInflater.from(context);
|
|
return factory.inflate(resource, root);
|
|
}
|
|
|
|
/**
|
|
* Scroll the view with standard behavior for scrolling beyond the normal
|
|
* content boundaries. Views that call this method should override
|
|
* {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the
|
|
* results of an over-scroll operation.
|
|
*
|
|
* Views can use this method to handle any touch or fling-based scrolling.
|
|
*
|
|
* @param deltaX Change in X in pixels
|
|
* @param deltaY Change in Y in pixels
|
|
* @param scrollX Current X scroll value in pixels before applying deltaX
|
|
* @param scrollY Current Y scroll value in pixels before applying deltaY
|
|
* @param scrollRangeX Maximum content scroll range along the X axis
|
|
* @param scrollRangeY Maximum content scroll range along the Y axis
|
|
* @param maxOverScrollX Number of pixels to overscroll by in either direction
|
|
* along the X axis.
|
|
* @param maxOverScrollY Number of pixels to overscroll by in either direction
|
|
* along the Y axis.
|
|
* @param isTouchEvent true if this scroll operation is the result of a touch event.
|
|
* @return true if scrolling was clamped to an over-scroll boundary along either
|
|
* axis, false otherwise.
|
|
*/
|
|
protected boolean overScrollBy(int deltaX, int deltaY,
|
|
int scrollX, int scrollY,
|
|
int scrollRangeX, int scrollRangeY,
|
|
int maxOverScrollX, int maxOverScrollY,
|
|
boolean isTouchEvent) {
|
|
final int overScrollMode = mOverScrollMode;
|
|
final boolean canScrollHorizontal =
|
|
computeHorizontalScrollRange() > computeHorizontalScrollExtent();
|
|
final boolean canScrollVertical =
|
|
computeVerticalScrollRange() > computeVerticalScrollExtent();
|
|
final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS ||
|
|
(overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal);
|
|
final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS ||
|
|
(overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical);
|
|
|
|
int newScrollX = scrollX + deltaX;
|
|
if (!overScrollHorizontal) {
|
|
maxOverScrollX = 0;
|
|
}
|
|
|
|
int newScrollY = scrollY + deltaY;
|
|
if (!overScrollVertical) {
|
|
maxOverScrollY = 0;
|
|
}
|
|
|
|
// Clamp values if at the limits and record
|
|
final int left = -maxOverScrollX;
|
|
final int right = maxOverScrollX + scrollRangeX;
|
|
final int top = -maxOverScrollY;
|
|
final int bottom = maxOverScrollY + scrollRangeY;
|
|
|
|
boolean clampedX = false;
|
|
if (newScrollX > right) {
|
|
newScrollX = right;
|
|
clampedX = true;
|
|
} else if (newScrollX < left) {
|
|
newScrollX = left;
|
|
clampedX = true;
|
|
}
|
|
|
|
boolean clampedY = false;
|
|
if (newScrollY > bottom) {
|
|
newScrollY = bottom;
|
|
clampedY = true;
|
|
} else if (newScrollY < top) {
|
|
newScrollY = top;
|
|
clampedY = true;
|
|
}
|
|
|
|
onOverScrolled(newScrollX, newScrollY, clampedX, clampedY);
|
|
|
|
return clampedX || clampedY;
|
|
}
|
|
|
|
/**
|
|
* Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to
|
|
* respond to the results of an over-scroll operation.
|
|
*
|
|
* @param scrollX New X scroll value in pixels
|
|
* @param scrollY New Y scroll value in pixels
|
|
* @param clampedX True if scrollX was clamped to an over-scroll boundary
|
|
* @param clampedY True if scrollY was clamped to an over-scroll boundary
|
|
*/
|
|
protected void onOverScrolled(int scrollX, int scrollY,
|
|
boolean clampedX, boolean clampedY) {
|
|
// Intentionally empty.
|
|
}
|
|
|
|
/**
|
|
* Returns the over-scroll mode for this view. The result will be
|
|
* one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}
|
|
* (allow over-scrolling only if the view content is larger than the container),
|
|
* or {@link #OVER_SCROLL_NEVER}.
|
|
*
|
|
* @return This view's over-scroll mode.
|
|
*/
|
|
public int getOverScrollMode() {
|
|
return mOverScrollMode;
|
|
}
|
|
|
|
/**
|
|
* Set the over-scroll mode for this view. Valid over-scroll modes are
|
|
* {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}
|
|
* (allow over-scrolling only if the view content is larger than the container),
|
|
* or {@link #OVER_SCROLL_NEVER}.
|
|
*
|
|
* Setting the over-scroll mode of a view will have an effect only if the
|
|
* view is capable of scrolling.
|
|
*
|
|
* @param overScrollMode The new over-scroll mode for this view.
|
|
*/
|
|
public void setOverScrollMode(int overScrollMode) {
|
|
if (overScrollMode != OVER_SCROLL_ALWAYS &&
|
|
overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS &&
|
|
overScrollMode != OVER_SCROLL_NEVER) {
|
|
throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode);
|
|
}
|
|
mOverScrollMode = overScrollMode;
|
|
}
|
|
|
|
/**
|
|
* A MeasureSpec encapsulates the layout requirements passed from parent to child.
|
|
* Each MeasureSpec represents a requirement for either the width or the height.
|
|
* A MeasureSpec is comprised of a size and a mode. There are three possible
|
|
* modes:
|
|
* <dl>
|
|
* <dt>UNSPECIFIED</dt>
|
|
* <dd>
|
|
* The parent has not imposed any constraint on the child. It can be whatever size
|
|
* it wants.
|
|
* </dd>
|
|
*
|
|
* <dt>EXACTLY</dt>
|
|
* <dd>
|
|
* The parent has determined an exact size for the child. The child is going to be
|
|
* given those bounds regardless of how big it wants to be.
|
|
* </dd>
|
|
*
|
|
* <dt>AT_MOST</dt>
|
|
* <dd>
|
|
* The child can be as large as it wants up to the specified size.
|
|
* </dd>
|
|
* </dl>
|
|
*
|
|
* MeasureSpecs are implemented as ints to reduce object allocation. This class
|
|
* is provided to pack and unpack the <size, mode> tuple into the int.
|
|
*/
|
|
public static class MeasureSpec {
|
|
private static final int MODE_SHIFT = 30;
|
|
private static final int MODE_MASK = 0x3 << MODE_SHIFT;
|
|
|
|
/**
|
|
* Measure specification mode: The parent has not imposed any constraint
|
|
* on the child. It can be whatever size it wants.
|
|
*/
|
|
public static final int UNSPECIFIED = 0 << MODE_SHIFT;
|
|
|
|
/**
|
|
* Measure specification mode: The parent has determined an exact size
|
|
* for the child. The child is going to be given those bounds regardless
|
|
* of how big it wants to be.
|
|
*/
|
|
public static final int EXACTLY = 1 << MODE_SHIFT;
|
|
|
|
/**
|
|
* Measure specification mode: The child can be as large as it wants up
|
|
* to the specified size.
|
|
*/
|
|
public static final int AT_MOST = 2 << MODE_SHIFT;
|
|
|
|
/**
|
|
* Creates a measure specification based on the supplied size and mode.
|
|
*
|
|
* The mode must always be one of the following:
|
|
* <ul>
|
|
* <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li>
|
|
* <li>{@link android.view.View.MeasureSpec#EXACTLY}</li>
|
|
* <li>{@link android.view.View.MeasureSpec#AT_MOST}</li>
|
|
* </ul>
|
|
*
|
|
* @param size the size of the measure specification
|
|
* @param mode the mode of the measure specification
|
|
* @return the measure specification based on size and mode
|
|
*/
|
|
public static int makeMeasureSpec(int size, int mode) {
|
|
return size + mode;
|
|
}
|
|
|
|
/**
|
|
* Extracts the mode from the supplied measure specification.
|
|
*
|
|
* @param measureSpec the measure specification to extract the mode from
|
|
* @return {@link android.view.View.MeasureSpec#UNSPECIFIED},
|
|
* {@link android.view.View.MeasureSpec#AT_MOST} or
|
|
* {@link android.view.View.MeasureSpec#EXACTLY}
|
|
*/
|
|
public static int getMode(int measureSpec) {
|
|
return (measureSpec & MODE_MASK);
|
|
}
|
|
|
|
/**
|
|
* Extracts the size from the supplied measure specification.
|
|
*
|
|
* @param measureSpec the measure specification to extract the size from
|
|
* @return the size in pixels defined in the supplied measure specification
|
|
*/
|
|
public static int getSize(int measureSpec) {
|
|
return (measureSpec & ~MODE_MASK);
|
|
}
|
|
|
|
/**
|
|
* Returns a String representation of the specified measure
|
|
* specification.
|
|
*
|
|
* @param measureSpec the measure specification to convert to a String
|
|
* @return a String with the following format: "MeasureSpec: MODE SIZE"
|
|
*/
|
|
public static String toString(int measureSpec) {
|
|
int mode = getMode(measureSpec);
|
|
int size = getSize(measureSpec);
|
|
|
|
StringBuilder sb = new StringBuilder("MeasureSpec: ");
|
|
|
|
if (mode == UNSPECIFIED)
|
|
sb.append("UNSPECIFIED ");
|
|
else if (mode == EXACTLY)
|
|
sb.append("EXACTLY ");
|
|
else if (mode == AT_MOST)
|
|
sb.append("AT_MOST ");
|
|
else
|
|
sb.append(mode).append(" ");
|
|
|
|
sb.append(size);
|
|
return sb.toString();
|
|
}
|
|
}
|
|
|
|
class CheckForLongPress implements Runnable {
|
|
|
|
private int mOriginalWindowAttachCount;
|
|
|
|
public void run() {
|
|
if (isPressed() && (mParent != null)
|
|
&& mOriginalWindowAttachCount == mWindowAttachCount) {
|
|
if (performLongClick()) {
|
|
mHasPerformedLongPress = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
public void rememberWindowAttachCount() {
|
|
mOriginalWindowAttachCount = mWindowAttachCount;
|
|
}
|
|
}
|
|
|
|
private final class CheckForTap implements Runnable {
|
|
public void run() {
|
|
mPrivateFlags &= ~PREPRESSED;
|
|
mPrivateFlags |= PRESSED;
|
|
refreshDrawableState();
|
|
if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) {
|
|
postCheckForLongClick(ViewConfiguration.getTapTimeout());
|
|
}
|
|
}
|
|
}
|
|
|
|
private final class PerformClick implements Runnable {
|
|
public void run() {
|
|
performClick();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when a key event is
|
|
* dispatched to this view. The callback will be invoked before the key
|
|
* event is given to the view.
|
|
*/
|
|
public interface OnKeyListener {
|
|
/**
|
|
* Called when a key is dispatched to a view. This allows listeners to
|
|
* get a chance to respond before the target view.
|
|
*
|
|
* @param v The view the key has been dispatched to.
|
|
* @param keyCode The code for the physical key that was pressed
|
|
* @param event The KeyEvent object containing full information about
|
|
* the event.
|
|
* @return True if the listener has consumed the event, false otherwise.
|
|
*/
|
|
boolean onKey(View v, int keyCode, KeyEvent event);
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when a touch event is
|
|
* dispatched to this view. The callback will be invoked before the touch
|
|
* event is given to the view.
|
|
*/
|
|
public interface OnTouchListener {
|
|
/**
|
|
* Called when a touch event is dispatched to a view. This allows listeners to
|
|
* get a chance to respond before the target view.
|
|
*
|
|
* @param v The view the touch event has been dispatched to.
|
|
* @param event The MotionEvent object containing full information about
|
|
* the event.
|
|
* @return True if the listener has consumed the event, false otherwise.
|
|
*/
|
|
boolean onTouch(View v, MotionEvent event);
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when a view has been clicked and held.
|
|
*/
|
|
public interface OnLongClickListener {
|
|
/**
|
|
* Called when a view has been clicked and held.
|
|
*
|
|
* @param v The view that was clicked and held.
|
|
*
|
|
* @return true if the callback consumed the long click, false otherwise.
|
|
*/
|
|
boolean onLongClick(View v);
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when the focus state of
|
|
* a view changed.
|
|
*/
|
|
public interface OnFocusChangeListener {
|
|
/**
|
|
* Called when the focus state of a view has changed.
|
|
*
|
|
* @param v The view whose state has changed.
|
|
* @param hasFocus The new focus state of v.
|
|
*/
|
|
void onFocusChange(View v, boolean hasFocus);
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when a view is clicked.
|
|
*/
|
|
public interface OnClickListener {
|
|
/**
|
|
* Called when a view has been clicked.
|
|
*
|
|
* @param v The view that was clicked.
|
|
*/
|
|
void onClick(View v);
|
|
}
|
|
|
|
/**
|
|
* Interface definition for a callback to be invoked when the context menu
|
|
* for this view is being built.
|
|
*/
|
|
public interface OnCreateContextMenuListener {
|
|
/**
|
|
* Called when the context menu for this view is being built. It is not
|
|
* safe to hold onto the menu after this method returns.
|
|
*
|
|
* @param menu The context menu that is being built
|
|
* @param v The view for which the context menu is being built
|
|
* @param menuInfo Extra information about the item for which the
|
|
* context menu should be shown. This information will vary
|
|
* depending on the class of v.
|
|
*/
|
|
void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo);
|
|
}
|
|
|
|
private final class UnsetPressedState implements Runnable {
|
|
public void run() {
|
|
setPressed(false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Base class for derived classes that want to save and restore their own
|
|
* state in {@link android.view.View#onSaveInstanceState()}.
|
|
*/
|
|
public static class BaseSavedState extends AbsSavedState {
|
|
/**
|
|
* Constructor used when reading from a parcel. Reads the state of the superclass.
|
|
*
|
|
* @param source
|
|
*/
|
|
public BaseSavedState(Parcel source) {
|
|
super(source);
|
|
}
|
|
|
|
/**
|
|
* Constructor called by derived classes when creating their SavedState objects
|
|
*
|
|
* @param superState The state of the superclass of this view
|
|
*/
|
|
public BaseSavedState(Parcelable superState) {
|
|
super(superState);
|
|
}
|
|
|
|
public static final Parcelable.Creator<BaseSavedState> CREATOR =
|
|
new Parcelable.Creator<BaseSavedState>() {
|
|
public BaseSavedState createFromParcel(Parcel in) {
|
|
return new BaseSavedState(in);
|
|
}
|
|
|
|
public BaseSavedState[] newArray(int size) {
|
|
return new BaseSavedState[size];
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* A set of information given to a view when it is attached to its parent
|
|
* window.
|
|
*/
|
|
static class AttachInfo {
|
|
interface Callbacks {
|
|
void playSoundEffect(int effectId);
|
|
boolean performHapticFeedback(int effectId, boolean always);
|
|
}
|
|
|
|
/**
|
|
* InvalidateInfo is used to post invalidate(int, int, int, int) messages
|
|
* to a Handler. This class contains the target (View) to invalidate and
|
|
* the coordinates of the dirty rectangle.
|
|
*
|
|
* For performance purposes, this class also implements a pool of up to
|
|
* POOL_LIMIT objects that get reused. This reduces memory allocations
|
|
* whenever possible.
|
|
*/
|
|
static class InvalidateInfo implements Poolable<InvalidateInfo> {
|
|
private static final int POOL_LIMIT = 10;
|
|
private static final Pool<InvalidateInfo> sPool = Pools.synchronizedPool(
|
|
Pools.finitePool(new PoolableManager<InvalidateInfo>() {
|
|
public InvalidateInfo newInstance() {
|
|
return new InvalidateInfo();
|
|
}
|
|
|
|
public void onAcquired(InvalidateInfo element) {
|
|
}
|
|
|
|
public void onReleased(InvalidateInfo element) {
|
|
}
|
|
}, POOL_LIMIT)
|
|
);
|
|
|
|
private InvalidateInfo mNext;
|
|
|
|
View target;
|
|
|
|
int left;
|
|
int top;
|
|
int right;
|
|
int bottom;
|
|
|
|
public void setNextPoolable(InvalidateInfo element) {
|
|
mNext = element;
|
|
}
|
|
|
|
public InvalidateInfo getNextPoolable() {
|
|
return mNext;
|
|
}
|
|
|
|
static InvalidateInfo acquire() {
|
|
return sPool.acquire();
|
|
}
|
|
|
|
void release() {
|
|
sPool.release(this);
|
|
}
|
|
}
|
|
|
|
final IWindowSession mSession;
|
|
|
|
final IWindow mWindow;
|
|
|
|
final IBinder mWindowToken;
|
|
|
|
final Callbacks mRootCallbacks;
|
|
|
|
/**
|
|
* The top view of the hierarchy.
|
|
*/
|
|
View mRootView;
|
|
|
|
IBinder mPanelParentWindowToken;
|
|
Surface mSurface;
|
|
|
|
/**
|
|
* Scale factor used by the compatibility mode
|
|
*/
|
|
float mApplicationScale;
|
|
|
|
/**
|
|
* Indicates whether the application is in compatibility mode
|
|
*/
|
|
boolean mScalingRequired;
|
|
|
|
/**
|
|
* Left position of this view's window
|
|
*/
|
|
int mWindowLeft;
|
|
|
|
/**
|
|
* Top position of this view's window
|
|
*/
|
|
int mWindowTop;
|
|
|
|
/**
|
|
* Indicates whether views need to use 32-bit drawing caches
|
|
*/
|
|
boolean mUse32BitDrawingCache;
|
|
|
|
/**
|
|
* For windows that are full-screen but using insets to layout inside
|
|
* of the screen decorations, these are the current insets for the
|
|
* content of the window.
|
|
*/
|
|
final Rect mContentInsets = new Rect();
|
|
|
|
/**
|
|
* For windows that are full-screen but using insets to layout inside
|
|
* of the screen decorations, these are the current insets for the
|
|
* actual visible parts of the window.
|
|
*/
|
|
final Rect mVisibleInsets = new Rect();
|
|
|
|
/**
|
|
* The internal insets given by this window. This value is
|
|
* supplied by the client (through
|
|
* {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will
|
|
* be given to the window manager when changed to be used in laying
|
|
* out windows behind it.
|
|
*/
|
|
final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets
|
|
= new ViewTreeObserver.InternalInsetsInfo();
|
|
|
|
/**
|
|
* All views in the window's hierarchy that serve as scroll containers,
|
|
* used to determine if the window can be resized or must be panned
|
|
* to adjust for a soft input area.
|
|
*/
|
|
final ArrayList<View> mScrollContainers = new ArrayList<View>();
|
|
|
|
final KeyEvent.DispatcherState mKeyDispatchState
|
|
= new KeyEvent.DispatcherState();
|
|
|
|
/**
|
|
* Indicates whether the view's window currently has the focus.
|
|
*/
|
|
boolean mHasWindowFocus;
|
|
|
|
/**
|
|
* The current visibility of the window.
|
|
*/
|
|
int mWindowVisibility;
|
|
|
|
/**
|
|
* Indicates the time at which drawing started to occur.
|
|
*/
|
|
long mDrawingTime;
|
|
|
|
/**
|
|
* Indicates whether or not ignoring the DIRTY_MASK flags.
|
|
*/
|
|
boolean mIgnoreDirtyState;
|
|
|
|
/**
|
|
* Indicates whether the view's window is currently in touch mode.
|
|
*/
|
|
boolean mInTouchMode;
|
|
|
|
/**
|
|
* Indicates that ViewRoot should trigger a global layout change
|
|
* the next time it performs a traversal
|
|
*/
|
|
boolean mRecomputeGlobalAttributes;
|
|
|
|
/**
|
|
* Set during a traveral if any views want to keep the screen on.
|
|
*/
|
|
boolean mKeepScreenOn;
|
|
|
|
/**
|
|
* Set if the visibility of any views has changed.
|
|
*/
|
|
boolean mViewVisibilityChanged;
|
|
|
|
/**
|
|
* Set to true if a view has been scrolled.
|
|
*/
|
|
boolean mViewScrollChanged;
|
|
|
|
/**
|
|
* Global to the view hierarchy used as a temporary for dealing with
|
|
* x/y points in the transparent region computations.
|
|
*/
|
|
final int[] mTransparentLocation = new int[2];
|
|
|
|
/**
|
|
* Global to the view hierarchy used as a temporary for dealing with
|
|
* x/y points in the ViewGroup.invalidateChild implementation.
|
|
*/
|
|
final int[] mInvalidateChildLocation = new int[2];
|
|
|
|
/**
|
|
* The view tree observer used to dispatch global events like
|
|
* layout, pre-draw, touch mode change, etc.
|
|
*/
|
|
final ViewTreeObserver mTreeObserver = new ViewTreeObserver();
|
|
|
|
/**
|
|
* A Canvas used by the view hierarchy to perform bitmap caching.
|
|
*/
|
|
Canvas mCanvas;
|
|
|
|
/**
|
|
* A Handler supplied by a view's {@link android.view.ViewRoot}. This
|
|
* handler can be used to pump events in the UI events queue.
|
|
*/
|
|
final Handler mHandler;
|
|
|
|
/**
|
|
* Identifier for messages requesting the view to be invalidated.
|
|
* Such messages should be sent to {@link #mHandler}.
|
|
*/
|
|
static final int INVALIDATE_MSG = 0x1;
|
|
|
|
/**
|
|
* Identifier for messages requesting the view to invalidate a region.
|
|
* Such messages should be sent to {@link #mHandler}.
|
|
*/
|
|
static final int INVALIDATE_RECT_MSG = 0x2;
|
|
|
|
/**
|
|
* Temporary for use in computing invalidate rectangles while
|
|
* calling up the hierarchy.
|
|
*/
|
|
final Rect mTmpInvalRect = new Rect();
|
|
|
|
/**
|
|
* Temporary list for use in collecting focusable descendents of a view.
|
|
*/
|
|
final ArrayList<View> mFocusablesTempList = new ArrayList<View>(24);
|
|
|
|
boolean mFullScreen;
|
|
|
|
/**
|
|
* Creates a new set of attachment information with the specified
|
|
* events handler and thread.
|
|
*
|
|
* @param handler the events handler the view must use
|
|
*/
|
|
AttachInfo(IWindowSession session, IWindow window,
|
|
Handler handler, Callbacks effectPlayer) {
|
|
mSession = session;
|
|
mWindow = window;
|
|
mWindowToken = window.asBinder();
|
|
mHandler = handler;
|
|
mRootCallbacks = effectPlayer;
|
|
mFullScreen = false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>ScrollabilityCache holds various fields used by a View when scrolling
|
|
* is supported. This avoids keeping too many unused fields in most
|
|
* instances of View.</p>
|
|
*/
|
|
private static class ScrollabilityCache implements Runnable {
|
|
|
|
/**
|
|
* Scrollbars are not visible
|
|
*/
|
|
public static final int OFF = 0;
|
|
|
|
/**
|
|
* Scrollbars are visible
|
|
*/
|
|
public static final int ON = 1;
|
|
|
|
/**
|
|
* Scrollbars are fading away
|
|
*/
|
|
public static final int FADING = 2;
|
|
|
|
public boolean fadeScrollBars;
|
|
|
|
public int fadingEdgeLength;
|
|
public int scrollBarDefaultDelayBeforeFade;
|
|
public int scrollBarFadeDuration;
|
|
|
|
public int scrollBarSize;
|
|
public ScrollBarDrawable scrollBar;
|
|
public float[] interpolatorValues;
|
|
public View host;
|
|
|
|
public final Paint paint;
|
|
public final Matrix matrix;
|
|
public Shader shader;
|
|
|
|
public final Interpolator scrollBarInterpolator = new Interpolator(1, 2);
|
|
|
|
private final float[] mOpaque = {255.0f};
|
|
private final float[] mTransparent = {0.0f};
|
|
|
|
/**
|
|
* When fading should start. This time moves into the future every time
|
|
* a new scroll happens. Measured based on SystemClock.uptimeMillis()
|
|
*/
|
|
public long fadeStartTime;
|
|
|
|
|
|
/**
|
|
* The current state of the scrollbars: ON, OFF, or FADING
|
|
*/
|
|
public int state = OFF;
|
|
|
|
private int mLastColor;
|
|
|
|
public ScrollabilityCache(ViewConfiguration configuration, View host) {
|
|
fadingEdgeLength = configuration.getScaledFadingEdgeLength();
|
|
scrollBarSize = configuration.getScaledScrollBarSize();
|
|
scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay();
|
|
scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration();
|
|
|
|
paint = new Paint();
|
|
matrix = new Matrix();
|
|
// use use a height of 1, and then wack the matrix each time we
|
|
// actually use it.
|
|
shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP);
|
|
|
|
paint.setShader(shader);
|
|
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
|
|
this.host = host;
|
|
}
|
|
|
|
public void setFadeColor(int color) {
|
|
if (color != 0 && color != mLastColor) {
|
|
mLastColor = color;
|
|
color |= 0xFF000000;
|
|
|
|
shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000,
|
|
color & 0x00FFFFFF, Shader.TileMode.CLAMP);
|
|
|
|
paint.setShader(shader);
|
|
// Restore the default transfer mode (src_over)
|
|
paint.setXfermode(null);
|
|
}
|
|
}
|
|
|
|
public void run() {
|
|
long now = AnimationUtils.currentAnimationTimeMillis();
|
|
if (now >= fadeStartTime) {
|
|
|
|
// the animation fades the scrollbars out by changing
|
|
// the opacity (alpha) from fully opaque to fully
|
|
// transparent
|
|
int nextFrame = (int) now;
|
|
int framesCount = 0;
|
|
|
|
Interpolator interpolator = scrollBarInterpolator;
|
|
|
|
// Start opaque
|
|
interpolator.setKeyFrame(framesCount++, nextFrame, mOpaque);
|
|
|
|
// End transparent
|
|
nextFrame += scrollBarFadeDuration;
|
|
interpolator.setKeyFrame(framesCount, nextFrame, mTransparent);
|
|
|
|
state = FADING;
|
|
|
|
// Kick off the fade animation
|
|
host.invalidate();
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|