1 /* 2 * Copyright (C) 2009 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 17 package com.android.launcher; 18 19 import android.appwidget.AppWidgetHostView; 20 import android.content.Context; 21 import android.view.LayoutInflater; 22 import android.view.MotionEvent; 23 import android.view.View; 24 import android.view.ViewConfiguration; 25 26 /** 27 * {@inheritDoc} 28 */ 29 public class LauncherAppWidgetHostView extends AppWidgetHostView { 30 private boolean mHasPerformedLongPress; 31 32 private CheckForLongPress mPendingCheckForLongPress; 33 34 private LayoutInflater mInflater; 35 LauncherAppWidgetHostView(Context context)36 public LauncherAppWidgetHostView(Context context) { 37 super(context); 38 mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 39 } 40 41 @Override getErrorView()42 protected View getErrorView() { 43 return mInflater.inflate(R.layout.appwidget_error, this, false); 44 } 45 onInterceptTouchEvent(MotionEvent ev)46 public boolean onInterceptTouchEvent(MotionEvent ev) { 47 // Consume any touch events for ourselves after longpress is triggered 48 if (mHasPerformedLongPress) { 49 mHasPerformedLongPress = false; 50 return true; 51 } 52 53 // Watch for longpress events at this level to make sure 54 // users can always pick up this widget 55 switch (ev.getAction()) { 56 case MotionEvent.ACTION_DOWN: { 57 postCheckForLongClick(); 58 break; 59 } 60 61 case MotionEvent.ACTION_UP: 62 case MotionEvent.ACTION_CANCEL: 63 mHasPerformedLongPress = false; 64 if (mPendingCheckForLongPress != null) { 65 removeCallbacks(mPendingCheckForLongPress); 66 } 67 break; 68 } 69 70 // Otherwise continue letting touch events fall through to children 71 return false; 72 } 73 74 class CheckForLongPress implements Runnable { 75 private int mOriginalWindowAttachCount; 76 run()77 public void run() { 78 if ((mParent != null) && hasWindowFocus() 79 && mOriginalWindowAttachCount == getWindowAttachCount() 80 && !mHasPerformedLongPress) { 81 if (performLongClick()) { 82 mHasPerformedLongPress = true; 83 } 84 } 85 } 86 rememberWindowAttachCount()87 public void rememberWindowAttachCount() { 88 mOriginalWindowAttachCount = getWindowAttachCount(); 89 } 90 } 91 postCheckForLongClick()92 private void postCheckForLongClick() { 93 mHasPerformedLongPress = false; 94 95 if (mPendingCheckForLongPress == null) { 96 mPendingCheckForLongPress = new CheckForLongPress(); 97 } 98 mPendingCheckForLongPress.rememberWindowAttachCount(); 99 postDelayed(mPendingCheckForLongPress, ViewConfiguration.getLongPressTimeout()); 100 } 101 102 @Override cancelLongPress()103 public void cancelLongPress() { 104 super.cancelLongPress(); 105 106 mHasPerformedLongPress = false; 107 if (mPendingCheckForLongPress != null) { 108 removeCallbacks(mPendingCheckForLongPress); 109 } 110 } 111 } 112