110 lines
3.2 KiB
Java
110 lines
3.2 KiB
Java
/*
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* Copyright (C) 2008 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.widget;
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import android.annotation.Widget;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.LayoutInflater;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.animation.AlphaAnimation;
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import com.android.internal.R;
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/**
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* The {@code ZoomControls} class displays a simple set of controls used for zooming and
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* provides callbacks to register for events. */
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@Widget
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public class ZoomControls extends LinearLayout {
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private final ZoomButton mZoomIn;
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private final ZoomButton mZoomOut;
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public ZoomControls(Context context) {
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this(context, null);
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}
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public ZoomControls(Context context, AttributeSet attrs) {
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super(context, attrs);
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setFocusable(false);
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LayoutInflater inflater = (LayoutInflater) context
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.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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inflater.inflate(R.layout.zoom_controls, this, // we are the parent
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true);
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mZoomIn = (ZoomButton) findViewById(R.id.zoomIn);
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mZoomOut = (ZoomButton) findViewById(R.id.zoomOut);
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}
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public void setOnZoomInClickListener(OnClickListener listener) {
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mZoomIn.setOnClickListener(listener);
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}
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public void setOnZoomOutClickListener(OnClickListener listener) {
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mZoomOut.setOnClickListener(listener);
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}
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/*
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* Sets how fast you get zoom events when the user holds down the
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* zoom in/out buttons.
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*/
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public void setZoomSpeed(long speed) {
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mZoomIn.setZoomSpeed(speed);
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mZoomOut.setZoomSpeed(speed);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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/* Consume all touch events so they don't get dispatched to the view
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* beneath this view.
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*/
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return true;
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}
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public void show() {
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fade(View.VISIBLE, 0.0f, 1.0f);
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}
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public void hide() {
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fade(View.GONE, 1.0f, 0.0f);
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}
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private void fade(int visibility, float startAlpha, float endAlpha) {
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AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha);
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anim.setDuration(500);
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startAnimation(anim);
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setVisibility(visibility);
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}
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public void setIsZoomInEnabled(boolean isEnabled) {
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mZoomIn.setEnabled(isEnabled);
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}
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public void setIsZoomOutEnabled(boolean isEnabled) {
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mZoomOut.setEnabled(isEnabled);
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}
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@Override
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public boolean hasFocus() {
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return mZoomIn.hasFocus() || mZoomOut.hasFocus();
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}
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}
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