| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.widget; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.KeyEvent; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.View.OnLongClickListener; |
| |
| /** |
| * This widget provides a simple utility for turning a continued long-press event |
| * into a series of clicks at some set frequency. There is no actual 'zoom' functionality |
| * handled by this widget directly. Instead, clients of this API should set up an |
| * {@link View#setOnClickListener(OnClickListener) onClickListener} to handle |
| * zoom functionality. That click listener is called on a frequency |
| * determined by {@link #setZoomSpeed(long)} whenever the user long-presses |
| * on the ZoomButton. |
| * |
| * @deprecated Use other means to handle this functionality. This widget is merely a |
| * simple wrapper around a long-press handler. |
| */ |
| @Deprecated |
| public class ZoomButton extends ImageButton implements OnLongClickListener { |
| |
| private final Runnable mRunnable = new Runnable() { |
| public void run() { |
| if (hasOnClickListeners() && mIsInLongpress && isEnabled()) { |
| callOnClick(); |
| postDelayed(this, mZoomSpeed); |
| } |
| } |
| }; |
| |
| private long mZoomSpeed = 1000; |
| private boolean mIsInLongpress; |
| |
| public ZoomButton(Context context) { |
| this(context, null); |
| } |
| |
| public ZoomButton(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public ZoomButton(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public ZoomButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| setOnLongClickListener(this); |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| if ((event.getAction() == MotionEvent.ACTION_CANCEL) |
| || (event.getAction() == MotionEvent.ACTION_UP)) { |
| mIsInLongpress = false; |
| } |
| return super.onTouchEvent(event); |
| } |
| |
| /** |
| * Sets the delay between calls to the widget's {@link View#setOnClickListener(OnClickListener) |
| * onClickListener}. |
| * |
| * @param speed The delay between calls to the click listener, in milliseconds |
| */ |
| public void setZoomSpeed(long speed) { |
| mZoomSpeed = speed; |
| } |
| |
| @Override |
| public boolean onLongClick(View v) { |
| mIsInLongpress = true; |
| post(mRunnable); |
| return true; |
| } |
| |
| @Override |
| public boolean onKeyUp(int keyCode, KeyEvent event) { |
| mIsInLongpress = false; |
| return super.onKeyUp(keyCode, event); |
| } |
| |
| @Override |
| public void setEnabled(boolean enabled) { |
| if (!enabled) { |
| |
| /* If we're being disabled reset the state back to unpressed |
| * as disabled views don't get events and therefore we won't |
| * get the up event to reset the state. |
| */ |
| setPressed(false); |
| } |
| super.setEnabled(enabled); |
| } |
| |
| @Override |
| public boolean dispatchUnhandledMove(View focused, int direction) { |
| clearFocus(); |
| return super.dispatchUnhandledMove(focused, direction); |
| } |
| |
| @Override |
| public CharSequence getAccessibilityClassName() { |
| return ZoomButton.class.getName(); |
| } |
| } |