100 lines
2.9 KiB
Java
100 lines
2.9 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.content.Context;
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import android.os.Handler;
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import android.util.AttributeSet;
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import android.view.KeyEvent;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.View.OnLongClickListener;
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public class ZoomButton extends ImageButton implements OnLongClickListener {
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private final Handler mHandler;
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private final Runnable mRunnable = new Runnable() {
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public void run() {
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if ((mOnClickListener != null) && mIsInLongpress && isEnabled()) {
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mOnClickListener.onClick(ZoomButton.this);
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mHandler.postDelayed(this, mZoomSpeed);
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}
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}
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};
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private long mZoomSpeed = 1000;
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private boolean mIsInLongpress;
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public ZoomButton(Context context) {
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this(context, null);
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}
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public ZoomButton(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public ZoomButton(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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mHandler = new Handler();
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setOnLongClickListener(this);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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if ((event.getAction() == MotionEvent.ACTION_CANCEL)
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|| (event.getAction() == MotionEvent.ACTION_UP)) {
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mIsInLongpress = false;
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}
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return super.onTouchEvent(event);
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}
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public void setZoomSpeed(long speed) {
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mZoomSpeed = speed;
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}
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public boolean onLongClick(View v) {
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mIsInLongpress = true;
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mHandler.post(mRunnable);
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return true;
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}
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@Override
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public boolean onKeyUp(int keyCode, KeyEvent event) {
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mIsInLongpress = false;
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return super.onKeyUp(keyCode, event);
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}
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@Override
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public void setEnabled(boolean enabled) {
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if (!enabled) {
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/* If we're being disabled reset the state back to unpressed
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* as disabled views don't get events and therefore we won't
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* get the up event to reset the state.
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*/
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setPressed(false);
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}
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super.setEnabled(enabled);
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}
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@Override
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public boolean dispatchUnhandledMove(View focused, int direction) {
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clearFocus();
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return super.dispatchUnhandledMove(focused, direction);
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}
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}
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