TaskView.java revision 47a3e65acc35cd3061bf3867e8b20753870fd892 
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.Paint;
25import android.graphics.Path;
26import android.graphics.Point;
27import android.graphics.Rect;
28import android.graphics.RectF;
29import android.util.AttributeSet;
30import android.view.MotionEvent;
31import android.view.View;
32import android.view.animation.AccelerateInterpolator;
33import android.widget.FrameLayout;
34import com.android.systemui.R;
35import com.android.systemui.recents.Constants;
36import com.android.systemui.recents.RecentsConfiguration;
37import com.android.systemui.recents.model.Task;
38
39
40/* A task view */
41public class TaskView extends FrameLayout implements Task.TaskCallbacks, View.OnClickListener,
42        View.OnLongClickListener {
43    /** The TaskView callbacks */
44    interface TaskViewCallbacks {
45        public void onTaskIconClicked(TaskView tv);
46        public void onTaskAppInfoClicked(TaskView tv);
47        public void onTaskFocused(TaskView tv);
48        public void onTaskDismissed(TaskView tv);
49
50        // public void onTaskViewReboundToTask(TaskView tv, Task t);
51    }
52
53    int mDim;
54    int mMaxDim;
55    TimeInterpolator mDimInterpolator = new AccelerateInterpolator();
56
57    Task mTask;
58    boolean mTaskDataLoaded;
59    boolean mIsFocused;
60    boolean mClipViewInStack;
61    Point mLastTouchDown = new Point();
62    Path mRoundedRectClipPath = new Path();
63
64    TaskThumbnailView mThumbnailView;
65    TaskBarView mBarView;
66    TaskViewCallbacks mCb;
67
68
69    public TaskView(Context context) {
70        this(context, null);
71    }
72
73    public TaskView(Context context, AttributeSet attrs) {
74        this(context, attrs, 0);
75    }
76
77    public TaskView(Context context, AttributeSet attrs, int defStyleAttr) {
78        this(context, attrs, defStyleAttr, 0);
79    }
80
81    public TaskView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
82        super(context, attrs, defStyleAttr, defStyleRes);
83        setWillNotDraw(false);
84    }
85
86    @Override
87    protected void onFinishInflate() {
88        RecentsConfiguration config = RecentsConfiguration.getInstance();
89        mMaxDim = config.taskStackMaxDim;
90
91        // By default, all views are clipped to other views in their stack
92        mClipViewInStack = true;
93
94        // Bind the views
95        mThumbnailView = (TaskThumbnailView) findViewById(R.id.task_view_thumbnail);
96        mBarView = (TaskBarView) findViewById(R.id.task_view_bar);
97
98        if (mTaskDataLoaded) {
99            onTaskDataLoaded(false);
100        }
101    }
102
103    @Override
104    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
105        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
106
107        // Update the rounded rect clip path
108        RecentsConfiguration config = RecentsConfiguration.getInstance();
109        float radius = config.taskViewRoundedCornerRadiusPx;
110        mRoundedRectClipPath.reset();
111        mRoundedRectClipPath.addRoundRect(new RectF(0, 0, getMeasuredWidth(), getMeasuredHeight()),
112                radius, radius, Path.Direction.CW);
113
114        // Update the outline
115        Outline o = new Outline();
116        o.setRoundRect(0, 0, getMeasuredWidth(), getMeasuredHeight(), 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.defaultBezierInterpolator)
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    /** Animates this task view as it enters recents */
225    public void animateOnEnterRecents() {
226        RecentsConfiguration config = RecentsConfiguration.getInstance();
227        mBarView.setAlpha(0f);
228        mBarView.animate()
229                .alpha(1f)
230                .setStartDelay(300)
231                .setInterpolator(config.defaultBezierInterpolator)
232                .setDuration(config.taskBarEnterAnimDuration)
233                .withLayer()
234                .start();
235    }
236
237    /** Animates this task view as it exits recents */
238    public void animateOnLeavingRecents(final Runnable r) {
239        RecentsConfiguration config = RecentsConfiguration.getInstance();
240        mBarView.animate()
241            .alpha(0f)
242            .setStartDelay(0)
243            .setInterpolator(config.defaultBezierInterpolator)
244            .setDuration(config.taskBarExitAnimDuration)
245            .withLayer()
246            .withEndAction(new Runnable() {
247                @Override
248                public void run() {
249                    post(r);
250                }
251            })
252            .start();
253    }
254
255    /** Animates the deletion of this task view */
256    public void animateRemoval(final Runnable r) {
257        // Disabling clipping with the stack while the view is animating away
258        setClipViewInStack(false);
259
260        RecentsConfiguration config = RecentsConfiguration.getInstance();
261        animate().translationX(config.taskViewRemoveAnimTranslationXPx)
262            .alpha(0f)
263            .setStartDelay(0)
264            .setInterpolator(config.defaultBezierInterpolator)
265            .setDuration(config.taskViewRemoveAnimDuration)
266            .withLayer()
267            .withEndAction(new Runnable() {
268                @Override
269                public void run() {
270                    post(r);
271
272                    // Re-enable clipping with the stack (we will reuse this view)
273                    setClipViewInStack(false);
274                }
275            })
276            .start();
277    }
278
279    /** Returns the rect we want to clip (it may not be the full rect) */
280    Rect getClippingRect(Rect outRect) {
281        getHitRect(outRect);
282        // XXX: We should get the hit rect of the thumbnail view and intersect, but this is faster
283        outRect.right = outRect.left + mThumbnailView.getRight();
284        outRect.bottom = outRect.top + mThumbnailView.getBottom();
285        return outRect;
286    }
287
288    /** Enable the hw layers on this task view */
289    void enableHwLayers() {
290        mThumbnailView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
291    }
292
293    /** Disable the hw layers on this task view */
294    void disableHwLayers() {
295        mThumbnailView.setLayerType(View.LAYER_TYPE_NONE, null);
296    }
297
298    /**
299     * Returns whether this view should be clipped, or any views below should clip against this
300     * view.
301     */
302    boolean shouldClipViewInStack() {
303        return mClipViewInStack;
304    }
305
306    /** Sets whether this view should be clipped, or clipped against. */
307    void setClipViewInStack(boolean clip) {
308        if (clip != mClipViewInStack) {
309            mClipViewInStack = clip;
310            if (getParent() instanceof View) {
311                Rect r = new Rect();
312                getHitRect(r);
313                ((View) getParent()).invalidate(r);
314            }
315        }
316    }
317
318    /** Update the dim as a function of the scale of this view. */
319    void updateDimOverlayFromScale() {
320        float minScale = Constants.Values.TaskStackView.StackPeekMinScale;
321        float scaleRange = 1f - minScale;
322        float dim = (1f - getScaleX()) / scaleRange;
323        dim = mDimInterpolator.getInterpolation(Math.min(dim, 1f));
324        mDim = Math.max(0, Math.min(mMaxDim, (int) (dim * 255)));
325    }
326
327    @Override
328    public void draw(Canvas canvas) {
329        // Apply the rounded rect clip path on the whole view
330        canvas.clipPath(mRoundedRectClipPath);
331
332        super.draw(canvas);
333
334        // Apply the dim if necessary
335        if (mDim > 0) {
336            canvas.drawColor(mDim << 24);
337        }
338    }
339
340    /**
341     * Sets the focused task explicitly. We need a separate flag because requestFocus() won't happen
342     * if the view is not currently visible, or we are in touch state (where we still want to keep
343     * track of focus).
344     */
345    public void setFocusedTask() {
346        mIsFocused = true;
347        requestFocus();
348        invalidate();
349        mCb.onTaskFocused(this);
350    }
351
352    /**
353     * Updates the explicitly focused state when the view focus changes.
354     */
355    @Override
356    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
357        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
358        if (!gainFocus) {
359            mIsFocused = false;
360            invalidate();
361        }
362    }
363
364    /**
365     * Returns whether we have explicitly been focused.
366     */
367    public boolean isFocusedTask() {
368        return mIsFocused || isFocused();
369    }
370
371    /**** TaskCallbacks Implementation ****/
372
373    /** Binds this task view to the task */
374    public void onTaskBound(Task t) {
375        mTask = t;
376        mTask.setCallbacks(this);
377    }
378
379    @Override
380    public void onTaskDataLoaded(boolean reloadingTaskData) {
381        if (mThumbnailView != null && mBarView != null) {
382            // Bind each of the views to the new task data
383            mThumbnailView.rebindToTask(mTask, reloadingTaskData);
384            mBarView.rebindToTask(mTask, reloadingTaskData);
385            // Rebind any listeners
386            mBarView.mApplicationIcon.setOnClickListener(this);
387            mBarView.mDismissButton.setOnClickListener(this);
388            if (Constants.DebugFlags.App.EnableDevAppInfoOnLongPress) {
389                RecentsConfiguration config = RecentsConfiguration.getInstance();
390                if (config.developerOptionsEnabled) {
391                    mBarView.mApplicationIcon.setOnLongClickListener(this);
392                }
393            }
394        }
395        mTaskDataLoaded = true;
396    }
397
398    @Override
399    public void onTaskDataUnloaded() {
400        if (mThumbnailView != null && mBarView != null) {
401            // Unbind each of the views from the task data and remove the task callback
402            mTask.setCallbacks(null);
403            mThumbnailView.unbindFromTask();
404            mBarView.unbindFromTask();
405            // Unbind any listeners
406            mBarView.mApplicationIcon.setOnClickListener(null);
407            mBarView.mDismissButton.setOnClickListener(null);
408            if (Constants.DebugFlags.App.EnableDevAppInfoOnLongPress) {
409                mBarView.mApplicationIcon.setOnLongClickListener(null);
410            }
411        }
412        mTaskDataLoaded = false;
413    }
414
415    @Override
416    public void onClick(View v) {
417        if (v == mBarView.mApplicationIcon) {
418            mCb.onTaskIconClicked(this);
419        } else if (v == mBarView.mDismissButton) {
420            // Animate out the view and call the callback
421            final TaskView tv = this;
422            animateRemoval(new Runnable() {
423                @Override
424                public void run() {
425                    mCb.onTaskDismissed(tv);
426                }
427            });
428        }
429    }
430
431    @Override
432    public boolean onLongClick(View v) {
433        if (v == mBarView.mApplicationIcon) {
434            mCb.onTaskAppInfoClicked(this);
435            return true;
436        }
437        return false;
438    }
439}
440