HeadsUpNotificationView.java revision 31ba192dd201df2cad96a8c503f730130ab0d80f 
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.ViewOutlineProvider;
30import android.view.ViewTreeObserver;
31import android.widget.FrameLayout;
32
33import com.android.systemui.ExpandHelper;
34import com.android.systemui.Gefingerpoken;
35import com.android.systemui.R;
36import com.android.systemui.SwipeHelper;
37import com.android.systemui.statusbar.ExpandableView;
38import com.android.systemui.statusbar.NotificationData;
39import com.android.systemui.statusbar.phone.PhoneStatusBar;
40
41public class HeadsUpNotificationView extends FrameLayout implements SwipeHelper.Callback, ExpandHelper.Callback,
42        ViewTreeObserver.OnComputeInternalInsetsListener {
43    private static final String TAG = "HeadsUpNotificationView";
44    private static final boolean DEBUG = false;
45    private static final boolean SPEW = DEBUG;
46
47    Rect mTmpRect = new Rect();
48    int[] mTmpTwoArray = new int[2];
49
50    private final int mTouchSensitivityDelay;
51    private final float mMaxAlpha = 1f;
52    private SwipeHelper mSwipeHelper;
53    private EdgeSwipeHelper mEdgeSwipeHelper;
54
55    private PhoneStatusBar mBar;
56    private ExpandHelper mExpandHelper;
57
58    private long mStartTouchTime;
59    private ViewGroup mContentHolder;
60
61    private NotificationData.Entry mHeadsUp;
62
63    public HeadsUpNotificationView(Context context, AttributeSet attrs) {
64        this(context, attrs, 0);
65    }
66
67    public HeadsUpNotificationView(Context context, AttributeSet attrs, int defStyle) {
68        super(context, attrs, defStyle);
69        mTouchSensitivityDelay = getResources().getInteger(R.integer.heads_up_sensitivity_delay);
70        if (DEBUG) Log.v(TAG, "create() " + mTouchSensitivityDelay);
71    }
72
73    public void setBar(PhoneStatusBar bar) {
74        mBar = bar;
75    }
76
77    public ViewGroup getHolder() {
78        return mContentHolder;
79    }
80
81    public boolean showNotification(NotificationData.Entry headsUp) {
82        if (mHeadsUp != null && headsUp != null && !mHeadsUp.key.equals(headsUp.key)) {
83            // bump any previous heads up back to the shade
84            release();
85        }
86
87        mHeadsUp = headsUp;
88        if (mContentHolder != null) {
89            mContentHolder.removeAllViews();
90        }
91
92        if (mHeadsUp != null) {
93            mHeadsUp.row.setSystemExpanded(true);
94            mHeadsUp.row.setShowingPublic(false);
95            if (mContentHolder == null) {
96                // too soon!
97                return false;
98            }
99            mContentHolder.setX(0);
100            mContentHolder.setVisibility(View.VISIBLE);
101            mContentHolder.setAlpha(mMaxAlpha);
102            mContentHolder.addView(mHeadsUp.row);
103
104            mSwipeHelper.snapChild(mContentHolder, 1f);
105            mStartTouchTime = System.currentTimeMillis() + mTouchSensitivityDelay;
106
107            mHeadsUp.setInterruption();
108
109            // 2. Animate mHeadsUpNotificationView in
110            mBar.scheduleHeadsUpOpen();
111
112            // 3. Set alarm to age the notification off
113            mBar.resetHeadsUpDecayTimer();
114        }
115        return true;
116    }
117
118    public boolean isShowing(String key) {
119        return mHeadsUp != null && mHeadsUp.key.equals(key);
120    }
121
122    /** Discard the Heads Up notification. */
123    public void clear() {
124        mHeadsUp = null;
125        mBar.scheduleHeadsUpClose();
126    }
127
128    /** Respond to dismissal of the Heads Up window. */
129    public void dismiss() {
130        if (mHeadsUp == null) return;
131        if (mHeadsUp.notification.isClearable()) {
132            mBar.onNotificationClear(mHeadsUp.notification);
133        } else {
134            release();
135        }
136        mHeadsUp = null;
137        mBar.scheduleHeadsUpClose();
138    }
139
140    /** Push any current Heads Up notification down into the shade. */
141    public void release() {
142        if (mHeadsUp != null) {
143            mBar.displayNotificationFromHeadsUp(mHeadsUp.notification);
144        }
145        mHeadsUp = null;
146    }
147
148    public void releaseAndClose() {
149        release();
150        mBar.scheduleHeadsUpClose();
151    }
152
153    public NotificationData.Entry getEntry() {
154        return mHeadsUp;
155    }
156
157    public boolean isClearable() {
158        return mHeadsUp == null || mHeadsUp.notification.isClearable();
159    }
160
161    // ViewGroup methods
162
163    private static final ViewOutlineProvider CONTENT_HOLDER_OUTLINE_PROVIDER =
164            new ViewOutlineProvider() {
165        @Override
166        public void getOutline(View view, Outline outline) {
167            int outlineLeft = view.getPaddingLeft();
168            int outlineTop = view.getPaddingTop();
169
170            // Apply padding to shadow.
171            outline.setRect(outlineLeft, outlineTop,
172                    view.getWidth() - outlineLeft - view.getPaddingRight(),
173                    view.getHeight() - outlineTop - view.getPaddingBottom());
174        }
175    };
176
177    @Override
178    public void onAttachedToWindow() {
179        float densityScale = getResources().getDisplayMetrics().density;
180        final ViewConfiguration viewConfiguration = ViewConfiguration.get(getContext());
181        float pagingTouchSlop = viewConfiguration.getScaledPagingTouchSlop();
182        float touchSlop = viewConfiguration.getScaledTouchSlop();
183        mSwipeHelper = new SwipeHelper(SwipeHelper.X, this, densityScale, pagingTouchSlop);
184        mSwipeHelper.setMaxSwipeProgress(mMaxAlpha);
185        mEdgeSwipeHelper = new EdgeSwipeHelper(touchSlop);
186
187        int minHeight = getResources().getDimensionPixelSize(R.dimen.notification_min_height);
188        int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_max_height);
189        mExpandHelper = new ExpandHelper(getContext(), this, minHeight, maxHeight);
190
191        mContentHolder = (ViewGroup) findViewById(R.id.content_holder);
192        mContentHolder.setOutlineProvider(CONTENT_HOLDER_OUTLINE_PROVIDER);
193
194        if (mHeadsUp != null) {
195            // whoops, we're on already!
196            showNotification(mHeadsUp);
197        }
198
199        getViewTreeObserver().addOnComputeInternalInsetsListener(this);
200    }
201
202    @Override
203    public boolean onInterceptTouchEvent(MotionEvent ev) {
204        if (DEBUG) Log.v(TAG, "onInterceptTouchEvent()");
205        if (System.currentTimeMillis() < mStartTouchTime) {
206            return true;
207        }
208        return mEdgeSwipeHelper.onInterceptTouchEvent(ev)
209                || mSwipeHelper.onInterceptTouchEvent(ev)
210                || mExpandHelper.onInterceptTouchEvent(ev)
211                || super.onInterceptTouchEvent(ev);
212    }
213
214    // View methods
215
216    @Override
217    public void onDraw(android.graphics.Canvas c) {
218        super.onDraw(c);
219        if (DEBUG) {
220            //Log.d(TAG, "onDraw: canvas height: " + c.getHeight() + "px; measured height: "
221            //        + getMeasuredHeight() + "px");
222            c.save();
223            c.clipRect(6, 6, c.getWidth() - 6, getMeasuredHeight() - 6,
224                    android.graphics.Region.Op.DIFFERENCE);
225            c.drawColor(0xFFcc00cc);
226            c.restore();
227        }
228    }
229
230    @Override
231    public boolean onTouchEvent(MotionEvent ev) {
232        if (System.currentTimeMillis() < mStartTouchTime) {
233            return false;
234        }
235        mBar.resetHeadsUpDecayTimer();
236        return mEdgeSwipeHelper.onTouchEvent(ev)
237                || mSwipeHelper.onTouchEvent(ev)
238                || mExpandHelper.onTouchEvent(ev)
239                || super.onTouchEvent(ev);
240    }
241
242    @Override
243    protected void onConfigurationChanged(Configuration newConfig) {
244        super.onConfigurationChanged(newConfig);
245        float densityScale = getResources().getDisplayMetrics().density;
246        mSwipeHelper.setDensityScale(densityScale);
247        float pagingTouchSlop = ViewConfiguration.get(getContext()).getScaledPagingTouchSlop();
248        mSwipeHelper.setPagingTouchSlop(pagingTouchSlop);
249    }
250
251    // ExpandHelper.Callback methods
252
253    @Override
254    public ExpandableView getChildAtRawPosition(float x, float y) {
255        return getChildAtPosition(x, y);
256    }
257
258    @Override
259    public ExpandableView getChildAtPosition(float x, float y) {
260        return mHeadsUp == null ? null : mHeadsUp.row;
261    }
262
263    @Override
264    public boolean canChildBeExpanded(View v) {
265        return mHeadsUp != null && mHeadsUp.row == v && mHeadsUp.row.isExpandable();
266    }
267
268    @Override
269    public void setUserExpandedChild(View v, boolean userExpanded) {
270        if (mHeadsUp != null && mHeadsUp.row == v) {
271            mHeadsUp.row.setUserExpanded(userExpanded);
272        }
273    }
274
275    @Override
276    public void setUserLockedChild(View v, boolean userLocked) {
277        if (mHeadsUp != null && mHeadsUp.row == v) {
278            mHeadsUp.row.setUserLocked(userLocked);
279        }
280    }
281
282    @Override
283    public void expansionStateChanged(boolean isExpanding) {
284
285    }
286
287    // SwipeHelper.Callback methods
288
289    @Override
290    public boolean canChildBeDismissed(View v) {
291        return true;
292    }
293
294    @Override
295    public void onChildDismissed(View v) {
296        Log.v(TAG, "User swiped heads up to dismiss");
297        mBar.onHeadsUpDismissed();
298    }
299
300    @Override
301    public void onBeginDrag(View v) {
302    }
303
304    @Override
305    public void onDragCancelled(View v) {
306        mContentHolder.setAlpha(mMaxAlpha); // sometimes this isn't quite reset
307    }
308
309    @Override
310    public void onChildSnappedBack(View animView) {
311    }
312
313    @Override
314    public boolean updateSwipeProgress(View animView, boolean dismissable, float swipeProgress) {
315        getBackground().setAlpha((int) (255 * swipeProgress));
316        return false;
317    }
318
319    @Override
320    public View getChildAtPosition(MotionEvent ev) {
321        return mContentHolder;
322    }
323
324    @Override
325    public View getChildContentView(View v) {
326        return mContentHolder;
327    }
328
329    @Override
330    public void onComputeInternalInsets(ViewTreeObserver.InternalInsetsInfo info) {
331        mContentHolder.getLocationOnScreen(mTmpTwoArray);
332
333        info.setTouchableInsets(ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
334        info.touchableRegion.set(mTmpTwoArray[0], mTmpTwoArray[1],
335                mTmpTwoArray[0] + mContentHolder.getWidth(),
336                mTmpTwoArray[1] + mContentHolder.getHeight());
337    }
338
339    public void escalate() {
340        mBar.scheduleHeadsUpEscalation();
341    }
342
343    private class EdgeSwipeHelper implements Gefingerpoken {
344        private static final boolean DEBUG_EDGE_SWIPE = false;
345        private final float mTouchSlop;
346        private boolean mConsuming;
347        private float mFirstY;
348        private float mFirstX;
349
350        public EdgeSwipeHelper(float touchSlop) {
351            mTouchSlop = touchSlop;
352        }
353
354        @Override
355        public boolean onInterceptTouchEvent(MotionEvent ev) {
356            switch (ev.getActionMasked()) {
357                case MotionEvent.ACTION_DOWN:
358                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action down " + ev.getY());
359                    mFirstX = ev.getX();
360                    mFirstY = ev.getY();
361                    mConsuming = false;
362                    break;
363
364                case MotionEvent.ACTION_MOVE:
365                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action move " + ev.getY());
366                    final float dY = ev.getY() - mFirstY;
367                    final float daX = Math.abs(ev.getX() - mFirstX);
368                    final float daY = Math.abs(dY);
369                    if (!mConsuming && (4f * daX) < daY && daY > mTouchSlop) {
370                        if (dY > 0) {
371                            if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found an open");
372                            mBar.animateExpandNotificationsPanel();
373                        }
374                        if (dY < 0) {
375                            if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found a close");
376                            mBar.onHeadsUpDismissed();
377                        }
378                        mConsuming = true;
379                    }
380                    break;
381
382                case MotionEvent.ACTION_UP:
383                case MotionEvent.ACTION_CANCEL:
384                    if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action done" );
385                    mConsuming = false;
386                    break;
387            }
388            return mConsuming;
389        }
390
391        @Override
392        public boolean onTouchEvent(MotionEvent ev) {
393            return mConsuming;
394        }
395    }
396}
397