1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.internal.widget; 18 19import android.content.Context; 20import android.util.AttributeSet; 21import android.view.KeyEvent; 22import android.view.MotionEvent; 23import android.widget.ImageButton; 24 25import com.android.internal.R; 26 27/** 28 * This class exists purely to cancel long click events. 29 */ 30public class NumberPickerButton extends ImageButton { 31 32 private NumberPicker mNumberPicker; 33 34 public NumberPickerButton(Context context, AttributeSet attrs, 35 int defStyle) { 36 super(context, attrs, defStyle); 37 } 38 39 public NumberPickerButton(Context context, AttributeSet attrs) { 40 super(context, attrs); 41 } 42 43 public NumberPickerButton(Context context) { 44 super(context); 45 } 46 47 public void setNumberPicker(NumberPicker picker) { 48 mNumberPicker = picker; 49 } 50 51 @Override 52 public boolean onTouchEvent(MotionEvent event) { 53 cancelLongpressIfRequired(event); 54 return super.onTouchEvent(event); 55 } 56 57 @Override 58 public boolean onTrackballEvent(MotionEvent event) { 59 cancelLongpressIfRequired(event); 60 return super.onTrackballEvent(event); 61 } 62 63 @Override 64 public boolean onKeyUp(int keyCode, KeyEvent event) { 65 if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) 66 || (keyCode == KeyEvent.KEYCODE_ENTER)) { 67 cancelLongpress(); 68 } 69 return super.onKeyUp(keyCode, event); 70 } 71 72 private void cancelLongpressIfRequired(MotionEvent event) { 73 if ((event.getAction() == MotionEvent.ACTION_CANCEL) 74 || (event.getAction() == MotionEvent.ACTION_UP)) { 75 cancelLongpress(); 76 } 77 } 78 79 private void cancelLongpress() { 80 if (R.id.increment == getId()) { 81 mNumberPicker.cancelIncrement(); 82 } else if (R.id.decrement == getId()) { 83 mNumberPicker.cancelDecrement(); 84 } 85 } 86} 87