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      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.launcher2;
     18 
     19 import android.appwidget.AppWidgetHostView;
     20 import android.appwidget.AppWidgetProviderInfo;
     21 import android.content.Context;
     22 import android.content.res.Resources;
     23 import android.view.LayoutInflater;
     24 import android.view.MotionEvent;
     25 import android.view.View;
     26 import android.view.ViewConfiguration;
     27 import android.view.ViewGroup;
     28 
     29 import com.android.launcher.R;
     30 import com.android.launcher2.Launcher.Padding;
     31 
     32 /**
     33  * {@inheritDoc}
     34  */
     35 public class LauncherAppWidgetHostView extends AppWidgetHostView {
     36     private boolean mHasPerformedLongPress;
     37     private CheckForLongPress mPendingCheckForLongPress;
     38     private LayoutInflater mInflater;
     39     private Launcher mLauncher;
     40 
     41     public LauncherAppWidgetHostView(Context context) {
     42         super(context);
     43         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     44         mLauncher = (Launcher) context;
     45     }
     46 
     47     @Override
     48     protected View getErrorView() {
     49         return mInflater.inflate(R.layout.appwidget_error, this, false);
     50     }
     51 
     52     public boolean onInterceptTouchEvent(MotionEvent ev) {
     53         // Consume any touch events for ourselves after longpress is triggered
     54         if (mHasPerformedLongPress) {
     55             mHasPerformedLongPress = false;
     56             return true;
     57         }
     58 
     59         // Watch for longpress events at this level to make sure
     60         // users can always pick up this widget
     61         switch (ev.getAction()) {
     62             case MotionEvent.ACTION_DOWN: {
     63                 postCheckForLongClick();
     64                 break;
     65             }
     66 
     67             case MotionEvent.ACTION_UP:
     68             case MotionEvent.ACTION_CANCEL:
     69                 mHasPerformedLongPress = false;
     70                 if (mPendingCheckForLongPress != null) {
     71                     removeCallbacks(mPendingCheckForLongPress);
     72                 }
     73                 break;
     74         }
     75 
     76         // Otherwise continue letting touch events fall through to children
     77         return false;
     78     }
     79 
     80     class CheckForLongPress implements Runnable {
     81         private int mOriginalWindowAttachCount;
     82 
     83         public void run() {
     84             if ((mParent != null) && hasWindowFocus()
     85                     && mOriginalWindowAttachCount == getWindowAttachCount()
     86                     && !mHasPerformedLongPress) {
     87                 if (performLongClick()) {
     88                     mHasPerformedLongPress = true;
     89                 }
     90             }
     91         }
     92 
     93         public void rememberWindowAttachCount() {
     94             mOriginalWindowAttachCount = getWindowAttachCount();
     95         }
     96     }
     97 
     98     private void postCheckForLongClick() {
     99         mHasPerformedLongPress = false;
    100 
    101         if (mPendingCheckForLongPress == null) {
    102             mPendingCheckForLongPress = new CheckForLongPress();
    103         }
    104         mPendingCheckForLongPress.rememberWindowAttachCount();
    105         postDelayed(mPendingCheckForLongPress, ViewConfiguration.getLongPressTimeout());
    106     }
    107 
    108     @Override
    109     public void cancelLongPress() {
    110         super.cancelLongPress();
    111 
    112         mHasPerformedLongPress = false;
    113         if (mPendingCheckForLongPress != null) {
    114             removeCallbacks(mPendingCheckForLongPress);
    115         }
    116     }
    117 
    118     @Override
    119     public int getDescendantFocusability() {
    120         return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
    121     }
    122 }
    123