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.ViewConfiguration;
25import android.view.ViewGroup;
26import android.widget.RemoteViews;
27
28import com.android.launcher3.DragLayer.TouchCompleteListener;
29
30/**
31 * {@inheritDoc}
32 */
33public class LauncherAppWidgetHostView extends AppWidgetHostView implements TouchCompleteListener {
34
35    LayoutInflater mInflater;
36
37    private CheckLongPressHelper mLongPressHelper;
38    private Context mContext;
39    private int mPreviousOrientation;
40    private DragLayer mDragLayer;
41
42    private float mSlop;
43
44    public LauncherAppWidgetHostView(Context context) {
45        super(context);
46        mContext = context;
47        mLongPressHelper = new CheckLongPressHelper(this);
48        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
49        mDragLayer = ((Launcher) context).getDragLayer();
50    }
51
52    @Override
53    protected View getErrorView() {
54        return mInflater.inflate(R.layout.appwidget_error, this, false);
55    }
56
57    @Override
58    public void updateAppWidget(RemoteViews remoteViews) {
59        // Store the orientation in which the widget was inflated
60        mPreviousOrientation = mContext.getResources().getConfiguration().orientation;
61        super.updateAppWidget(remoteViews);
62    }
63
64    public boolean isReinflateRequired() {
65        // Re-inflate is required if the orientation has changed since last inflated.
66        int orientation = mContext.getResources().getConfiguration().orientation;
67        if (mPreviousOrientation != orientation) {
68           return true;
69       }
70       return false;
71    }
72
73    public boolean onInterceptTouchEvent(MotionEvent ev) {
74        // Just in case the previous long press hasn't been cleared, we make sure to start fresh
75        // on touch down.
76        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
77            mLongPressHelper.cancelLongPress();
78        }
79
80        // Consume any touch events for ourselves after longpress is triggered
81        if (mLongPressHelper.hasPerformedLongPress()) {
82            mLongPressHelper.cancelLongPress();
83            return true;
84        }
85
86        // Watch for longpress events at this level to make sure
87        // users can always pick up this widget
88        switch (ev.getAction()) {
89            case MotionEvent.ACTION_DOWN: {
90                mLongPressHelper.postCheckForLongPress();
91                mDragLayer.setTouchCompleteListener(this);
92                break;
93            }
94
95            case MotionEvent.ACTION_UP:
96            case MotionEvent.ACTION_CANCEL:
97                mLongPressHelper.cancelLongPress();
98                break;
99            case MotionEvent.ACTION_MOVE:
100                if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
101                    mLongPressHelper.cancelLongPress();
102                }
103                break;
104        }
105
106        // Otherwise continue letting touch events fall through to children
107        return false;
108    }
109
110    public boolean onTouchEvent(MotionEvent ev) {
111        // If the widget does not handle touch, then cancel
112        // long press when we release the touch
113        switch (ev.getAction()) {
114            case MotionEvent.ACTION_UP:
115            case MotionEvent.ACTION_CANCEL:
116                mLongPressHelper.cancelLongPress();
117                break;
118            case MotionEvent.ACTION_MOVE:
119                if (!Utilities.pointInView(this, ev.getX(), ev.getY(), mSlop)) {
120                    mLongPressHelper.cancelLongPress();
121                }
122                break;
123        }
124        return false;
125    }
126
127    @Override
128    protected void onAttachedToWindow() {
129        super.onAttachedToWindow();
130        mSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();
131    }
132
133    @Override
134    public void cancelLongPress() {
135        super.cancelLongPress();
136        mLongPressHelper.cancelLongPress();
137    }
138
139    @Override
140    public void onTouchComplete() {
141        if (!mLongPressHelper.hasPerformedLongPress()) {
142            // If a long press has been performed, we don't want to clear the record of that since
143            // we still may be receiving a touch up which we want to intercept
144            mLongPressHelper.cancelLongPress();
145        }
146    }
147
148    @Override
149    public int getDescendantFocusability() {
150        return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
151    }
152}
153