LauncherAppWidgetHostView.java revision 3798b643cd8a5c7c85864eced90374cf0fb45640 
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
17package com.android.launcher3;
18
19import android.appwidget.AppWidgetHostView;
20import android.content.Context;
21import android.view.LayoutInflater;
22import android.view.MotionEvent;
23import android.view.View;
24import android.view.ViewGroup;
25import android.widget.RemoteViews;
26
27import com.android.launcher3.DragLayer.TouchCompleteListener;
28
29/**
30 * {@inheritDoc}
31 */
32public class LauncherAppWidgetHostView extends AppWidgetHostView implements TouchCompleteListener {
33    private CheckLongPressHelper mLongPressHelper;
34    private LayoutInflater mInflater;
35    private Context mContext;
36    private int mPreviousOrientation;
37    private DragLayer mDragLayer;
38
39    public LauncherAppWidgetHostView(Context context) {
40        super(context);
41        mContext = context;
42        mLongPressHelper = new CheckLongPressHelper(this);
43        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
44        mDragLayer = ((Launcher) context).getDragLayer();
45    }
46
47    @Override
48    protected View getErrorView() {
49        return mInflater.inflate(R.layout.appwidget_error, this, false);
50    }
51
52    @Override
53    public void updateAppWidget(RemoteViews remoteViews) {
54        // Store the orientation in which the widget was inflated
55        mPreviousOrientation = mContext.getResources().getConfiguration().orientation;
56        super.updateAppWidget(remoteViews);
57    }
58
59    public boolean orientationChangedSincedInflation() {
60        int orientation = mContext.getResources().getConfiguration().orientation;
61        if (mPreviousOrientation != orientation) {
62           return true;
63       }
64       return false;
65    }
66
67    public boolean onInterceptTouchEvent(MotionEvent ev) {
68        // Just in case the previous long press hasn't been cleared, we make sure to start fresh
69        // on touch down.
70        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
71            mLongPressHelper.cancelLongPress();
72        }
73
74        // Consume any touch events for ourselves after longpress is triggered
75        if (mLongPressHelper.hasPerformedLongPress()) {
76            mLongPressHelper.cancelLongPress();
77            return true;
78        }
79
80        // Watch for longpress events at this level to make sure
81        // users can always pick up this widget
82        switch (ev.getAction()) {
83            case MotionEvent.ACTION_DOWN: {
84                mLongPressHelper.postCheckForLongPress();
85                mDragLayer.setTouchCompleteListener(this);
86                break;
87            }
88
89            case MotionEvent.ACTION_UP:
90            case MotionEvent.ACTION_CANCEL:
91                mLongPressHelper.cancelLongPress();
92                break;
93        }
94
95        // Otherwise continue letting touch events fall through to children
96        return false;
97    }
98
99    public boolean onTouchEvent(MotionEvent ev) {
100        // If the widget does not handle touch, then cancel
101        // long press when we release the touch
102        switch (ev.getAction()) {
103            case MotionEvent.ACTION_UP:
104            case MotionEvent.ACTION_CANCEL:
105                mLongPressHelper.cancelLongPress();
106                break;
107        }
108        return false;
109    }
110
111    @Override
112    public void cancelLongPress() {
113        super.cancelLongPress();
114        mLongPressHelper.cancelLongPress();
115    }
116
117    @Override
118    public void onTouchComplete() {
119        if (!mLongPressHelper.hasPerformedLongPress()) {
120            // If a long press has been performed, we don't want to clear the record of that since
121            // we still may be receiving a touch up which we want to intercept
122            mLongPressHelper.cancelLongPress();
123        }
124    }
125
126    @Override
127    public int getDescendantFocusability() {
128        return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
129    }
130}
131