TaskView.java revision 521e7dc0a6782371a710ee81bf804f7e97aaa292 
1/*
2 * Copyright (C) 2014 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.recents.views;
18
19import android.animation.TimeInterpolator;
20import android.animation.ValueAnimator;
21import android.content.Context;
22import android.graphics.Canvas;
23import android.graphics.Outline;
24import android.graphics.Path;
25import android.graphics.Point;
26import android.graphics.Rect;
27import android.graphics.RectF;
28import android.util.AttributeSet;
29import android.view.MotionEvent;
30import android.view.View;
31import android.view.animation.AccelerateInterpolator;
32import android.widget.FrameLayout;
33import com.android.systemui.R;
34import com.android.systemui.recents.Constants;
35import com.android.systemui.recents.RecentsConfiguration;
36import com.android.systemui.recents.model.Task;
37
38
39/* A task view */
40public class TaskView extends FrameLayout implements Task.TaskCallbacks, View.OnClickListener,
41        View.OnLongClickListener {
42    /** The TaskView callbacks */
43    interface TaskViewCallbacks {
44        public void onTaskIconClicked(TaskView tv);
45        public void onTaskAppInfoClicked(TaskView tv);
46        public void onTaskFocused(TaskView tv);
47        public void onTaskDismissed(TaskView tv);
48
49        // public void onTaskViewReboundToTask(TaskView tv, Task t);
50    }
51
52    int mDim;
53    int mMaxDim;
54    TimeInterpolator mDimInterpolator = new AccelerateInterpolator();
55
56    Task mTask;
57    boolean mTaskDataLoaded;
58    boolean mIsFocused;
59    boolean mClipViewInStack;
60    Point mLastTouchDown = new Point();
61    Path mRoundedRectClipPath = new Path();
62
63    TaskThumbnailView mThumbnailView;
64    TaskBarView mBarView;
65    TaskViewCallbacks mCb;
66
67
68    public TaskView(Context context) {
69        this(context, null);
70    }
71
72    public TaskView(Context context, AttributeSet attrs) {
73        this(context, attrs, 0);
74    }
75
76    public TaskView(Context context, AttributeSet attrs, int defStyleAttr) {
77        this(context, attrs, defStyleAttr, 0);
78    }
79
80    public TaskView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
81        super(context, attrs, defStyleAttr, defStyleRes);
82        setWillNotDraw(false);
83    }
84
85    @Override
86    protected void onFinishInflate() {
87        RecentsConfiguration config = RecentsConfiguration.getInstance();
88        mMaxDim = config.taskStackMaxDim;
89
90        // By default, all views are clipped to other views in their stack
91        mClipViewInStack = true;
92
93        // Bind the views
94        mThumbnailView = (TaskThumbnailView) findViewById(R.id.task_view_thumbnail);
95        mBarView = (TaskBarView) findViewById(R.id.task_view_bar);
96
97        if (mTaskDataLoaded) {
98            onTaskDataLoaded(false);
99        }
100    }
101
102    @Override
103    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
104        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
105
106        // Update the rounded rect clip path
107        RecentsConfiguration config = RecentsConfiguration.getInstance();
108        float radius = config.taskViewRoundedCornerRadiusPx;
109        mRoundedRectClipPath.reset();
110        mRoundedRectClipPath.addRoundRect(new RectF(0, 0, getMeasuredWidth(), getMeasuredHeight()),
111                radius, radius, Path.Direction.CW);
112
113        // Update the outline
114        Outline o = new Outline();
115        o.setRoundRect(0, 0, getMeasuredWidth(), getMeasuredHeight() -
116                config.taskViewShadowOutlineBottomInsetPx, radius);
117        setOutline(o);
118    }
119
120    @Override
121    public boolean onInterceptTouchEvent(MotionEvent ev) {
122        switch (ev.getAction()) {
123            case MotionEvent.ACTION_DOWN:
124            case MotionEvent.ACTION_MOVE:
125                mLastTouchDown.set((int) ev.getX(), (int) ev.getY());
126                break;
127        }
128        return super.onInterceptTouchEvent(ev);
129    }
130
131    /** Set callback */
132    void setCallbacks(TaskViewCallbacks cb) {
133        mCb = cb;
134    }
135
136    /** Gets the task */
137    Task getTask() {
138        return mTask;
139    }
140
141    /** Synchronizes this view's properties with the task's transform */
142    void updateViewPropertiesToTaskTransform(TaskViewTransform animateFromTransform,
143                                             TaskViewTransform toTransform, int duration) {
144        RecentsConfiguration config = RecentsConfiguration.getInstance();
145        int minZ = config.taskViewTranslationZMinPx;
146        int incZ = config.taskViewTranslationZIncrementPx;
147
148        // Update the bar view
149        mBarView.updateViewPropertiesToTaskTransform(animateFromTransform, toTransform, duration);
150
151        // Update this task view
152        if (duration > 0) {
153            if (animateFromTransform != null) {
154                setTranslationY(animateFromTransform.translationY);
155                if (Constants.DebugFlags.App.EnableShadows) {
156                    setTranslationZ(Math.max(minZ, minZ + (animateFromTransform.t * incZ)));
157                }
158                setScaleX(animateFromTransform.scale);
159                setScaleY(animateFromTransform.scale);
160                setAlpha(animateFromTransform.alpha);
161            }
162            if (Constants.DebugFlags.App.EnableShadows) {
163                animate().translationZ(Math.max(minZ, minZ + (toTransform.t * incZ)));
164            }
165            animate().translationY(toTransform.translationY)
166                    .scaleX(toTransform.scale)
167                    .scaleY(toTransform.scale)
168                    .alpha(toTransform.alpha)
169                    .setDuration(duration)
170                    .setInterpolator(config.fastOutSlowInInterpolator)
171                    .withLayer()
172                    .setUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
173                        @Override
174                        public void onAnimationUpdate(ValueAnimator animation) {
175                            updateDimOverlayFromScale();
176                        }
177                    })
178                    .start();
179        } else {
180            setTranslationY(toTransform.translationY);
181            if (Constants.DebugFlags.App.EnableShadows) {
182                setTranslationZ(Math.max(minZ, minZ + (toTransform.t * incZ)));
183            }
184            setScaleX(toTransform.scale);
185            setScaleY(toTransform.scale);
186            setAlpha(toTransform.alpha);
187        }
188        updateDimOverlayFromScale();
189        invalidate();
190    }
191
192    /** Resets this view's properties */
193    void resetViewProperties() {
194        setTranslationX(0f);
195        setTranslationY(0f);
196        if (Constants.DebugFlags.App.EnableShadows) {
197            setTranslationZ(0f);
198        }
199        setScaleX(1f);
200        setScaleY(1f);
201        setAlpha(1f);
202        invalidate();
203    }
204
205    /**
206     * When we are un/filtering, this method will set up the transform that we are animating to,
207     * in order to hide the task.
208     */
209    void prepareTaskTransformForFilterTaskHidden(TaskViewTransform toTransform) {
210        // Fade the view out and slide it away
211        toTransform.alpha = 0f;
212        toTransform.translationY += 200;
213    }
214
215    /**
216     * When we are un/filtering, this method will setup the transform that we are animating from,
217     * in order to show the task.
218     */
219    void prepareTaskTransformForFilterTaskVisible(TaskViewTransform fromTransform) {
220        // Fade the view in
221        fromTransform.alpha = 0f;
222    }
223
224    /** Prepares this task view for the enter-recents animations.  This is called earlier in the
225     * first layout because the actual animation into recents may take a long time. */
226    public void prepareAnimateOnEnterRecents() {
227        mBarView.setVisibility(View.INVISIBLE);
228    }
229
230    /** Animates this task view as it enters recents */
231    public void animateOnEnterRecents() {
232        RecentsConfiguration config = RecentsConfiguration.getInstance();
233        mBarView.setVisibility(View.VISIBLE);
234        mBarView.setTranslationY(-mBarView.getMeasuredHeight());
235        mBarView.animate()
236                .translationY(0)
237                .setStartDelay(config.taskBarEnterAnimDelay)
238                .setInterpolator(config.fastOutSlowInInterpolator)
239                .setDuration(config.taskBarEnterAnimDuration)
240                .withLayer()
241                .start();
242    }
243
244    /** Animates this task view as it exits recents */
245    public void animateOnLeavingRecents(final Runnable r) {
246        RecentsConfiguration config = RecentsConfiguration.getInstance();
247        mBarView.animate()
248            .translationY(-mBarView.getMeasuredHeight())
249            .setStartDelay(0)
250            .setInterpolator(config.fastOutLinearInInterpolator)
251            .setDuration(config.taskBarExitAnimDuration)
252            .withLayer()
253            .withEndAction(new Runnable() {
254                @Override
255                public void run() {
256                    post(r);
257                }
258            })
259            .start();
260    }
261
262    /** Animates the deletion of this task view */
263    public void animateRemoval(final Runnable r) {
264        // Disabling clipping with the stack while the view is animating away
265        setClipViewInStack(false);
266
267        RecentsConfiguration config = RecentsConfiguration.getInstance();
268        animate().translationX(config.taskViewRemoveAnimTranslationXPx)
269            .alpha(0f)
270            .setStartDelay(0)
271            .setInterpolator(config.fastOutSlowInInterpolator)
272            .setDuration(config.taskViewRemoveAnimDuration)
273            .withLayer()
274            .withEndAction(new Runnable() {
275                @Override
276                public void run() {
277                    post(r);
278
279                    // Re-enable clipping with the stack (we will reuse this view)
280                    setClipViewInStack(false);
281                }
282            })
283            .start();
284    }
285
286    /** Returns the rect we want to clip (it may not be the full rect) */
287    Rect getClippingRect(Rect outRect) {
288        getHitRect(outRect);
289        // XXX: We should get the hit rect of the thumbnail view and intersect, but this is faster
290        outRect.right = outRect.left + mThumbnailView.getRight();
291        outRect.bottom = outRect.top + mThumbnailView.getBottom();
292        return outRect;
293    }
294
295    /** Enable the hw layers on this task view */
296    void enableHwLayers() {
297        mThumbnailView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
298    }
299
300    /** Disable the hw layers on this task view */
301    void disableHwLayers() {
302        mThumbnailView.setLayerType(View.LAYER_TYPE_NONE, null);
303    }
304
305    /**
306     * Returns whether this view should be clipped, or any views below should clip against this
307     * view.
308     */
309    boolean shouldClipViewInStack() {
310        return mClipViewInStack;
311    }
312
313    /** Sets whether this view should be clipped, or clipped against. */
314    void setClipViewInStack(boolean clip) {
315        if (clip != mClipViewInStack) {
316            mClipViewInStack = clip;
317            if (getParent() instanceof View) {
318                Rect r = new Rect();
319                getHitRect(r);
320                ((View) getParent()).invalidate(r);
321            }
322        }
323    }
324
325    /** Update the dim as a function of the scale of this view. */
326    void updateDimOverlayFromScale() {
327        float minScale = Constants.Values.TaskStackView.StackPeekMinScale;
328        float scaleRange = 1f - minScale;
329        float dim = (1f - getScaleX()) / scaleRange;
330        dim = mDimInterpolator.getInterpolation(Math.min(dim, 1f));
331        mDim = Math.max(0, Math.min(mMaxDim, (int) (dim * 255)));
332    }
333
334    @Override
335    public void draw(Canvas canvas) {
336        // Apply the rounded rect clip path on the whole view
337        canvas.clipPath(mRoundedRectClipPath);
338
339        super.draw(canvas);
340
341        // Apply the dim if necessary
342        if (mDim > 0) {
343            canvas.drawColor(mDim << 24);
344        }
345    }
346
347    /**
348     * Sets the focused task explicitly. We need a separate flag because requestFocus() won't happen
349     * if the view is not currently visible, or we are in touch state (where we still want to keep
350     * track of focus).
351     */
352    public void setFocusedTask() {
353        mIsFocused = true;
354        requestFocus();
355        invalidate();
356        mCb.onTaskFocused(this);
357    }
358
359    /**
360     * Updates the explicitly focused state when the view focus changes.
361     */
362    @Override
363    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
364        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
365        if (!gainFocus) {
366            mIsFocused = false;
367            invalidate();
368        }
369    }
370
371    /**
372     * Returns whether we have explicitly been focused.
373     */
374    public boolean isFocusedTask() {
375        return mIsFocused || isFocused();
376    }
377
378    /**** TaskCallbacks Implementation ****/
379
380    /** Binds this task view to the task */
381    public void onTaskBound(Task t) {
382        mTask = t;
383        mTask.setCallbacks(this);
384    }
385
386    @Override
387    public void onTaskDataLoaded(boolean reloadingTaskData) {
388        if (mThumbnailView != null && mBarView != null) {
389            // Bind each of the views to the new task data
390            mThumbnailView.rebindToTask(mTask, reloadingTaskData);
391            mBarView.rebindToTask(mTask, reloadingTaskData);
392            // Rebind any listeners
393            mBarView.mApplicationIcon.setOnClickListener(this);
394            mBarView.mDismissButton.setOnClickListener(this);
395            if (Constants.DebugFlags.App.EnableDevAppInfoOnLongPress) {
396                RecentsConfiguration config = RecentsConfiguration.getInstance();
397                if (config.developerOptionsEnabled) {
398                    mBarView.mApplicationIcon.setOnLongClickListener(this);
399                }
400            }
401        }
402        mTaskDataLoaded = true;
403    }
404
405    @Override
406    public void onTaskDataUnloaded() {
407        if (mThumbnailView != null && mBarView != null) {
408            // Unbind each of the views from the task data and remove the task callback
409            mTask.setCallbacks(null);
410            mThumbnailView.unbindFromTask();
411            mBarView.unbindFromTask();
412            // Unbind any listeners
413            mBarView.mApplicationIcon.setOnClickListener(null);
414            mBarView.mDismissButton.setOnClickListener(null);
415            if (Constants.DebugFlags.App.EnableDevAppInfoOnLongPress) {
416                mBarView.mApplicationIcon.setOnLongClickListener(null);
417            }
418        }
419        mTaskDataLoaded = false;
420    }
421
422    @Override
423    public void onClick(View v) {
424        if (v == mBarView.mApplicationIcon) {
425            mCb.onTaskIconClicked(this);
426        } else if (v == mBarView.mDismissButton) {
427            // Animate out the view and call the callback
428            final TaskView tv = this;
429            animateRemoval(new Runnable() {
430                @Override
431                public void run() {
432                    mCb.onTaskDismissed(tv);
433                }
434            });
435        }
436    }
437
438    @Override
439    public boolean onLongClick(View v) {
440        if (v == mBarView.mApplicationIcon) {
441            mCb.onTaskAppInfoClicked(this);
442            return true;
443        }
444        return false;
445    }
446}
447