HeadsUpNotificationView.java revision de61fd7822ea15fb691405c1aae472caa58e83ba 
1/*
2 * Copyright (C) 2011 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.systemui.statusbar.policy;
18
19import android.content.Context;
20import android.content.res.Configuration;
21import android.graphics.Outline;
22import android.graphics.Rect;
23import android.util.AttributeSet;
24import android.util.Log;
25import android.view.MotionEvent;
26import android.view.View;
27import android.view.ViewConfiguration;
28import android.view.ViewGroup;
29import android.view.ViewTreeObserver;
30import android.widget.FrameLayout;
31
32import com.android.systemui.ExpandHelper;
33import com.android.systemui.Gefingerpoken;
34import com.android.systemui.R;
35import com.android.systemui.SwipeHelper;
36import com.android.systemui.statusbar.BaseStatusBar;
37import com.android.systemui.statusbar.ExpandableView;
38import com.android.systemui.statusbar.NotificationData;
39
40public class HeadsUpNotificationView extends FrameLayout implements SwipeHelper.Callback, ExpandHelper.Callback,
41        ViewTreeObserver.OnComputeInternalInsetsListener {
42    private static final String TAG = "HeadsUpNotificationView";
43    private static final boolean DEBUG = false;
44    private static final boolean SPEW = DEBUG;
45
46    Rect mTmpRect = new Rect();
47    int[] mTmpTwoArray = new int[2];
48
49    private final int mTouchSensitivityDelay;
50    private final float mMaxAlpha = 0.95f;
51    private SwipeHelper mSwipeHelper;
52    private EdgeSwipeHelper mEdgeSwipeHelper;
53
54    private BaseStatusBar mBar;
55    private ExpandHelper mExpandHelper;
56
57    private long mStartTouchTime;
58    private ViewGroup mContentHolder;
59
60    private NotificationData.Entry mHeadsUp;
61
62    public HeadsUpNotificationView(Context context, AttributeSet attrs) {
63        this(context, attrs, 0);
64    }
65
66    public HeadsUpNotificationView(Context context, AttributeSet attrs, int defStyle) {
67        super(context, attrs, defStyle);
68        mTouchSensitivityDelay = getResources().getInteger(R.integer.heads_up_sensitivity_delay);
69        if (DEBUG) Log.v(TAG, "create() " + mTouchSensitivityDelay);
70    }
71
72    public void setBar(BaseStatusBar bar) {
73        mBar = bar;
74    }
75
76    public ViewGroup getHolder() {
77        return mContentHolder;
78    }
79
80    public boolean setNotification(NotificationData.Entry headsUp) {
81        mHeadsUp = headsUp;
82        if (mContentHolder != null) {
83            mContentHolder.removeAllViews();
84        }
85
86        if (mHeadsUp != null) {
87            mHeadsUp.row.setSystemExpanded(true);
88            mHeadsUp.row.setShowingPublic(false);
89            if (mContentHolder == null) {
90                // too soon!
91                return false;
92            }
93            mContentHolder.setX(0);
94            mContentHolder.setVisibility(View.VISIBLE);
95            mContentHolder.setAlpha(mMaxAlpha);
96            mContentHolder.addView(mHeadsUp.row);
97
98            mSwipeHelper.snapChild(mContentHolder, 1f);
99            mStartTouchTime = System.currentTimeMillis() + mTouchSensitivityDelay;
100        }
101        return true;
102    }
103
104    public boolean isClearable() {
105        return mHeadsUp == null || mHeadsUp.notification.isClearable();
106    }
107
108    // ViewGroup methods
109
110    @Override
111    public void onAttachedToWindow() {
112        float densityScale = getResources().getDisplayMetrics().density;
113        final ViewConfiguration viewConfiguration = ViewConfiguration.get(getContext());
114        float pagingTouchSlop = viewConfiguration.getScaledPagingTouchSlop();
115        float touchSlop = viewConfiguration.getScaledTouchSlop();
116        mSwipeHelper = new SwipeHelper(SwipeHelper.X, this, densityScale, pagingTouchSlop);
117        mSwipeHelper.setMaxAlpha(mMaxAlpha);
118        mEdgeSwipeHelper = new EdgeSwipeHelper(touchSlop);
119
120        int minHeight = getResources().getDimensionPixelSize(R.dimen.notification_min_height);
121        int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_max_height);
122        mExpandHelper = new ExpandHelper(getContext(), this, minHeight, maxHeight);
123
124        mContentHolder = (ViewGroup) findViewById(R.id.content_holder);
125
126        if (mHeadsUp != null) {
127            // whoops, we're on already!
128            setNotification(mHeadsUp);
129        }
130
131        getViewTreeObserver().addOnComputeInternalInsetsListener(this);
132    }
133
134    @Override
135    public boolean onInterceptTouchEvent(MotionEvent ev) {
136        if (DEBUG) Log.v(TAG, "onInterceptTouchEvent()");
137        if (System.currentTimeMillis() < mStartTouchTime) {
138            return true;
139        }
140        return mEdgeSwipeHelper.onInterceptTouchEvent(ev)
141                || mSwipeHelper.onInterceptTouchEvent(ev)
142                || mExpandHelper.onInterceptTouchEvent(ev)
143                || super.onInterceptTouchEvent(ev);
144    }
145
146    // View methods
147
148    @Override
149    public void onDraw(android.graphics.Canvas c) {
150        super.onDraw(c);
151        if (DEBUG) {
152            //Log.d(TAG, "onDraw: canvas height: " + c.getHeight() + "px; measured height: "
153            //        + getMeasuredHeight() + "px");
154            c.save();
155            c.clipRect(6, 6, c.getWidth() - 6, getMeasuredHeight() - 6,
156                    android.graphics.Region.Op.DIFFERENCE);
157            c.drawColor(0xFFcc00cc);
158            c.restore();
159        }
160    }
161
162    @Override
163    public boolean onTouchEvent(MotionEvent ev) {
164        if (System.currentTimeMillis() < mStartTouchTime) {
165            return false;
166        }
167        mBar.resetHeadsUpDecayTimer();
168        return mEdgeSwipeHelper.onTouchEvent(ev)
169                || mSwipeHelper.onTouchEvent(ev)
170                || mExpandHelper.onTouchEvent(ev)
171                || super.onTouchEvent(ev);
172    }
173
174    @Override
175    protected void onConfigurationChanged(Configuration newConfig) {
176        super.onConfigurationChanged(newConfig);
177        float densityScale = getResources().getDisplayMetrics().density;
178        mSwipeHelper.setDensityScale(densityScale);
179        float pagingTouchSlop = ViewConfiguration.get(getContext()).getScaledPagingTouchSlop();
180        mSwipeHelper.setPagingTouchSlop(pagingTouchSlop);
181    }
182
183    @Override
184    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
185        super.onLayout(changed, left, top, right, bottom);
186        Outline o = new Outline();
187        o.setRect(0, 0, mContentHolder.getWidth(), mContentHolder.getHeight());
188        mContentHolder.setOutline(o);
189    }
190
191    // ExpandHelper.Callback methods
192
193    @Override
194    public ExpandableView getChildAtRawPosition(float x, float y) {
195        return getChildAtPosition(x, y);
196    }
197
198    @Override
199    public ExpandableView getChildAtPosition(float x, float y) {
200        return mHeadsUp == null ? null : mHeadsUp.row;
201    }
202
203    @Override
204    public boolean canChildBeExpanded(View v) {
205        return mHeadsUp != null && mHeadsUp.row == v && mHeadsUp.row.isExpandable();
206    }
207
208    @Override
209    public void setUserExpandedChild(View v, boolean userExpanded) {
210        if (mHeadsUp != null && mHeadsUp.row == v) {
211            mHeadsUp.row.setUserExpanded(userExpanded);
212        }
213    }
214
215    @Override
216    public void setUserLockedChild(View v, boolean userLocked) {
217        if (mHeadsUp != null && mHeadsUp.row == v) {
218            mHeadsUp.row.setUserLocked(userLocked);
219        }
220    }
221
222    // SwipeHelper.Callback methods
223
224    @Override
225    public boolean canChildBeDismissed(View v) {
226        return true;
227    }
228
229    @Override
230    public void onChildDismissed(View v) {
231        Log.v(TAG, "User swiped heads up to dismiss");
232        mBar.onHeadsUpDismissed();
233    }
234
235    @Override
236    public void onBeginDrag(View v) {
237    }
238
239    @Override
240    public void onDragCancelled(View v) {
241        mContentHolder.setAlpha(mMaxAlpha); // sometimes this isn't quite reset
242    }
243
244    @Override
245    public void onChildSnappedBack(View animView) {
246    }
247
248    @Override
249    public View getChildAtPosition(MotionEvent ev) {
250        return mContentHolder;
251    }
252
253    @Override
254    public View getChildContentView(View v) {
255        return mContentHolder;
256    }
257
258    @Override
259    public void onComputeInternalInsets(ViewTreeObserver.InternalInsetsInfo info) {
260        mContentHolder.getLocationOnScreen(mTmpTwoArray);
261
262        info.setTouchableInsets(ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
263        info.touchableRegion.set(mTmpTwoArray[0], mTmpTwoArray[1],
264                mTmpTwoArray[0] + mContentHolder.getWidth(),
265                mTmpTwoArray[1] + mContentHolder.getHeight());
266    }
267
268    private class EdgeSwipeHelper implements Gefingerpoken {
269        private static final boolean DEBUG_EDGE_SWIPE = false;
270        private final float mTouchSlop;
271        private boolean mConsuming;
272        private float mFirstY;
273        private float mFirstX;
274
275        public EdgeSwipeHelper(float touchSlop) {
276            mTouchSlop = touchSlop;
277        }
278
279        @Override
280        public boolean onInterceptTouchEvent(MotionEvent ev) {
281            switch (ev.getActionMasked()) {
282                case MotionEvent.ACTION_DOWN:
283                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action down " + ev.getY());
284                    mFirstX = ev.getX();
285                    mFirstY = ev.getY();
286                    mConsuming = false;
287                    break;
288
289                case MotionEvent.ACTION_MOVE:
290                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action move " + ev.getY());
291                    final float dY = ev.getY() - mFirstY;
292                    final float daX = Math.abs(ev.getX() - mFirstX);
293                    final float daY = Math.abs(dY);
294                    if (!mConsuming && (4f * daX) < daY && daY > mTouchSlop) {
295                        if (dY > 0) {
296                            if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found an open");
297                            mBar.animateExpandNotificationsPanel();
298                        }
299                        if (dY < 0) {
300                            if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found a close");
301                            mBar.onHeadsUpDismissed();
302                        }
303                        mConsuming = true;
304                    }
305                    break;
306
307                case MotionEvent.ACTION_UP:
308                case MotionEvent.ACTION_CANCEL:
309                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action done" );
310                    mConsuming = false;
311                    break;
312            }
313            return mConsuming;
314        }
315
316        @Override
317        public boolean onTouchEvent(MotionEvent ev) {
318            return mConsuming;
319        }
320    }
321}