ScrimController.java revision 190d026167401ed593924dd12ab6e134e2d08e94 
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.statusbar.phone;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.ValueAnimator;
22import android.content.Context;
23import android.graphics.Color;
24import android.graphics.drawable.ColorDrawable;
25import android.util.Log;
26import android.view.View;
27import android.view.ViewTreeObserver;
28import android.view.animation.AnimationUtils;
29import android.view.animation.DecelerateInterpolator;
30import android.view.animation.Interpolator;
31
32import com.android.systemui.R;
33
34/**
35 * Controls both the scrim behind the notifications and in front of the notifications (when a
36 * security method gets shown).
37 */
38public class ScrimController implements ViewTreeObserver.OnPreDrawListener {
39    private static final String TAG = "ScrimController";
40    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
41
42    public static final long ANIMATION_DURATION = 220;
43
44    private static final float SCRIM_BEHIND_ALPHA = 0.62f;
45    private static final float SCRIM_BEHIND_ALPHA_KEYGUARD = 0.55f;
46    private static final float SCRIM_BEHIND_ALPHA_UNLOCKING = 0.2f;
47    private static final float SCRIM_IN_FRONT_ALPHA = 0.75f;
48    private static final int TAG_KEY_ANIM = R.id.scrim;
49
50    private final View mScrimBehind;
51    private final View mScrimInFront;
52    private final UnlockMethodCache mUnlockMethodCache;
53    private final DozeParameters mDozeParameters;
54
55    private boolean mKeyguardShowing;
56    private float mFraction;
57
58    private boolean mDarkenWhileDragging;
59    private boolean mBouncerShowing;
60    private boolean mAnimateChange;
61    private boolean mUpdatePending;
62    private boolean mExpanding;
63    private boolean mAnimateKeyguardFadingOut;
64    private long mDurationOverride = -1;
65    private long mAnimationDelay;
66    private Runnable mOnAnimationFinished;
67    private boolean mAnimationStarted;
68    private boolean mDozing;
69    private long mPulseEndTime;
70    private final Interpolator mInterpolator = new DecelerateInterpolator();
71    private final Interpolator mLinearOutSlowInInterpolator;
72
73    public ScrimController(View scrimBehind, View scrimInFront) {
74        mScrimBehind = scrimBehind;
75        mScrimInFront = scrimInFront;
76        final Context context = scrimBehind.getContext();
77        mUnlockMethodCache = UnlockMethodCache.getInstance(context);
78        mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(context,
79                android.R.interpolator.linear_out_slow_in);
80        mDozeParameters = new DozeParameters(context);
81    }
82
83    public void setKeyguardShowing(boolean showing) {
84        mKeyguardShowing = showing;
85        scheduleUpdate();
86    }
87
88    public void onTrackingStarted() {
89        mExpanding = true;
90        mDarkenWhileDragging = !mUnlockMethodCache.isMethodInsecure();
91    }
92
93    public void onExpandingFinished() {
94        mExpanding = false;
95    }
96
97    public void setPanelExpansion(float fraction) {
98        if (mFraction != fraction) {
99            mFraction = fraction;
100            scheduleUpdate();
101        }
102    }
103
104    public void setBouncerShowing(boolean showing) {
105        mBouncerShowing = showing;
106        mAnimateChange = !mExpanding;
107        scheduleUpdate();
108    }
109
110    public void animateKeyguardFadingOut(long delay, long duration, Runnable onAnimationFinished) {
111        mAnimateKeyguardFadingOut = true;
112        mDurationOverride = duration;
113        mAnimationDelay = delay;
114        mAnimateChange = true;
115        mOnAnimationFinished = onAnimationFinished;
116        scheduleUpdate();
117    }
118
119    public void animateGoingToFullShade(long delay, long duration) {
120        mDurationOverride = duration;
121        mAnimationDelay = delay;
122        mAnimateChange = true;
123        scheduleUpdate();
124    }
125
126    public void setDozing(boolean dozing) {
127        if (mDozing == dozing) return;
128        mDozing = dozing;
129        if (!mDozing) {
130            cancelPulsing();
131            mAnimateChange = true;
132        } else {
133            mAnimateChange = false;
134        }
135        scheduleUpdate();
136    }
137
138    /** When dozing, fade screen contents in and out using the front scrim. */
139    public long pulse() {
140        if (!mDozing) return 0;
141        final long now = System.currentTimeMillis();
142        if (DEBUG) Log.d(TAG, "pulse mPulseEndTime=" + mPulseEndTime + " now=" + now);
143        if (mPulseEndTime != 0 && mPulseEndTime > now) return mPulseEndTime - now;
144        mScrimInFront.post(mPulseIn);
145        mPulseEndTime = now + mDozeParameters.getPulseDuration();
146        return mPulseEndTime - now;
147    }
148
149    public boolean isPulsing() {
150        return mDozing && mPulseEndTime != 0;
151    }
152
153    private void cancelPulsing() {
154        if (DEBUG) Log.d(TAG, "Cancel pulsing");
155        mScrimInFront.removeCallbacks(mPulseIn);
156        mScrimInFront.removeCallbacks(mPulseOut);
157        mPulseEndTime = 0;
158    }
159
160    private void scheduleUpdate() {
161        if (mUpdatePending) return;
162
163        // Make sure that a frame gets scheduled.
164        mScrimBehind.invalidate();
165        mScrimBehind.getViewTreeObserver().addOnPreDrawListener(this);
166        mUpdatePending = true;
167    }
168
169    private void updateScrims() {
170        if (mAnimateKeyguardFadingOut) {
171            setScrimInFrontColor(0f);
172            setScrimBehindColor(0f);
173        } else if (!mKeyguardShowing && !mBouncerShowing) {
174            updateScrimNormal();
175            setScrimInFrontColor(0);
176        } else {
177            updateScrimKeyguard();
178        }
179        mAnimateChange = false;
180    }
181
182    private void updateScrimKeyguard() {
183        if (mExpanding && mDarkenWhileDragging) {
184            float behindFraction = Math.max(0, Math.min(mFraction, 1));
185            float fraction = 1 - behindFraction;
186            fraction = (float) Math.pow(fraction, 0.8f);
187            behindFraction = (float) Math.pow(behindFraction, 0.8f);
188            setScrimInFrontColor(fraction * SCRIM_IN_FRONT_ALPHA);
189            setScrimBehindColor(behindFraction * SCRIM_BEHIND_ALPHA_KEYGUARD);
190        } else if (mBouncerShowing) {
191            setScrimInFrontColor(SCRIM_IN_FRONT_ALPHA);
192            setScrimBehindColor(0f);
193        } else if (mDozing) {
194            setScrimInFrontColor(1);
195        } else {
196            float fraction = Math.max(0, Math.min(mFraction, 1));
197            setScrimInFrontColor(0f);
198            setScrimBehindColor(fraction
199                    * (SCRIM_BEHIND_ALPHA_KEYGUARD - SCRIM_BEHIND_ALPHA_UNLOCKING)
200                    + SCRIM_BEHIND_ALPHA_UNLOCKING);
201        }
202    }
203
204    private void updateScrimNormal() {
205        float frac = mFraction;
206        // let's start this 20% of the way down the screen
207        frac = frac * 1.2f - 0.2f;
208        if (frac <= 0) {
209            setScrimBehindColor(0);
210        } else {
211            // woo, special effects
212            final float k = (float)(1f-0.5f*(1f-Math.cos(3.14159f * Math.pow(1f-frac, 2f))));
213            setScrimBehindColor(k * SCRIM_BEHIND_ALPHA);
214        }
215    }
216
217    private void setScrimBehindColor(float alpha) {
218        setScrimColor(mScrimBehind, alpha);
219    }
220
221    private void setScrimInFrontColor(float alpha) {
222        setScrimColor(mScrimInFront, alpha);
223        if (alpha == 0f) {
224            mScrimInFront.setClickable(false);
225        } else {
226
227            // Eat touch events (unless dozing).
228            mScrimInFront.setClickable(!mDozing);
229        }
230    }
231
232    private void setScrimColor(View scrim, float alpha) {
233        int color = Color.argb((int) (alpha * 255), 0, 0, 0);
234        if (mAnimateChange) {
235            startScrimAnimation(scrim, color);
236        } else {
237            scrim.setBackgroundColor(color);
238        }
239    }
240
241    private void startScrimAnimation(final View scrim, int targetColor) {
242        int current = getBackgroundAlpha(scrim);
243        int target = Color.alpha(targetColor);
244        if (current == targetColor) {
245            return;
246        }
247        Object runningAnim = scrim.getTag(TAG_KEY_ANIM);
248        if (runningAnim instanceof ValueAnimator) {
249            ((ValueAnimator) runningAnim).cancel();
250        }
251        ValueAnimator anim = ValueAnimator.ofInt(current, target);
252        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
253            @Override
254            public void onAnimationUpdate(ValueAnimator animation) {
255                int value = (int) animation.getAnimatedValue();
256                scrim.setBackgroundColor(Color.argb(value, 0, 0, 0));
257            }
258        });
259        anim.setInterpolator(mAnimateKeyguardFadingOut
260                ? mLinearOutSlowInInterpolator
261                : mInterpolator);
262        anim.setStartDelay(mAnimationDelay);
263        anim.setDuration(mDurationOverride != -1 ? mDurationOverride : ANIMATION_DURATION);
264        anim.addListener(new AnimatorListenerAdapter() {
265
266            @Override
267            public void onAnimationEnd(Animator animation) {
268                if (mOnAnimationFinished != null) {
269                    mOnAnimationFinished.run();
270                    mOnAnimationFinished = null;
271                }
272                scrim.setTag(TAG_KEY_ANIM, null);
273            }
274        });
275        anim.start();
276        scrim.setTag(TAG_KEY_ANIM, anim);
277        mAnimationStarted = true;
278    }
279
280    private int getBackgroundAlpha(View scrim) {
281        if (scrim.getBackground() instanceof ColorDrawable) {
282            ColorDrawable drawable = (ColorDrawable) scrim.getBackground();
283            return Color.alpha(drawable.getColor());
284        } else {
285            return 0;
286        }
287    }
288
289    @Override
290    public boolean onPreDraw() {
291        mScrimBehind.getViewTreeObserver().removeOnPreDrawListener(this);
292        mUpdatePending = false;
293        updateScrims();
294        mAnimateKeyguardFadingOut = false;
295        mDurationOverride = -1;
296        mAnimationDelay = 0;
297
298        // Make sure that we always call the listener even if we didn't start an animation.
299        if (!mAnimationStarted && mOnAnimationFinished != null) {
300            mOnAnimationFinished.run();
301            mOnAnimationFinished = null;
302        }
303        mAnimationStarted = false;
304        return true;
305    }
306
307    private final Runnable mPulseIn = new Runnable() {
308        @Override
309        public void run() {
310            if (DEBUG) Log.d(TAG, "Pulse in, mDozing=" + mDozing);
311            if (!mDozing) return;
312            mDurationOverride = mDozeParameters.getPulseInDuration();
313            mAnimationDelay = 0;
314            mAnimateChange = true;
315            mOnAnimationFinished = mPulseInFinished;
316            setScrimColor(mScrimInFront, 0);
317        }
318    };
319
320    private final Runnable mPulseInFinished = new Runnable() {
321        @Override
322        public void run() {
323            if (DEBUG) Log.d(TAG, "Pulse in finished, mDozing=" + mDozing);
324            if (!mDozing) return;
325            mScrimInFront.postDelayed(mPulseOut, mDozeParameters.getPulseVisibleDuration());
326        }
327    };
328
329    private final Runnable mPulseOut = new Runnable() {
330        @Override
331        public void run() {
332            if (DEBUG) Log.d(TAG, "Pulse out, mDozing=" + mDozing);
333            if (!mDozing) return;
334            mDurationOverride = mDozeParameters.getPulseOutDuration();
335            mAnimationDelay = 0;
336            mAnimateChange = true;
337            mOnAnimationFinished = mPulseOutFinished;
338            setScrimColor(mScrimInFront, 1);
339        }
340    };
341
342    private final Runnable mPulseOutFinished = new Runnable() {
343        @Override
344        public void run() {
345            if (DEBUG) Log.d(TAG, "Pulse out finished");
346            mPulseEndTime = 0;
347        }
348    };
349}
350