DozeScrimController.java revision 048af1f727dc81a6450e004391d072599ac449ee 
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.annotation.NonNull;
23import android.content.Context;
24import android.graphics.Color;
25import android.os.Handler;
26import android.util.Log;
27import android.view.animation.Animation;
28import android.view.animation.AnimationUtils;
29import android.view.animation.Interpolator;
30
31import com.android.systemui.doze.DozeHost;
32import com.android.systemui.doze.DozeLog;
33
34/**
35 * Controller which handles all the doze animations of the scrims.
36 */
37public class DozeScrimController {
38    private static final String TAG = "DozeScrimController";
39    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
40
41    private final DozeParameters mDozeParameters;
42    private final Interpolator mPulseInInterpolator = PhoneStatusBar.ALPHA_OUT;
43    private final Interpolator mPulseOutInterpolator = PhoneStatusBar.ALPHA_IN;
44    private final Interpolator mDozeAnimationInterpolator;
45    private final Handler mHandler = new Handler();
46    private final ScrimController mScrimController;
47
48    private boolean mDozing;
49    private DozeHost.PulseCallback mPulseCallback;
50    private Animator mInFrontAnimator;
51    private Animator mBehindAnimator;
52    private float mInFrontTarget;
53    private float mBehindTarget;
54
55    public DozeScrimController(ScrimController scrimController, Context context) {
56        mScrimController = scrimController;
57        mDozeParameters = new DozeParameters(context);
58        mDozeAnimationInterpolator = AnimationUtils.loadInterpolator(context,
59                android.R.interpolator.linear_out_slow_in);
60    }
61
62    public void setDozing(boolean dozing, boolean animate) {
63        if (mDozing == dozing) return;
64        mDozing = dozing;
65        if (mDozing) {
66            abortAnimations();
67            mScrimController.setDozeBehindAlpha(1f);
68            mScrimController.setDozeInFrontAlpha(1f);
69        } else {
70            cancelPulsing();
71            if (animate) {
72                startScrimAnimation(false /* inFront */, 0f /* target */,
73                        NotificationPanelView.DOZE_ANIMATION_DURATION, mDozeAnimationInterpolator);
74                startScrimAnimation(true /* inFront */, 0f /* target */,
75                        NotificationPanelView.DOZE_ANIMATION_DURATION, mDozeAnimationInterpolator);
76            } else {
77                abortAnimations();
78                mScrimController.setDozeBehindAlpha(0f);
79                mScrimController.setDozeInFrontAlpha(0f);
80            }
81        }
82    }
83
84    /** When dozing, fade screen contents in and out using the front scrim. */
85    public void pulse(@NonNull DozeHost.PulseCallback callback) {
86        if (callback == null) {
87            throw new IllegalArgumentException("callback must not be null");
88        }
89
90        if (!mDozing || mPulseCallback != null) {
91            // Pulse suppressed.
92            callback.onPulseFinished();
93            return;
94        }
95
96        // Begin pulse.  Note that it's very important that the pulse finished callback
97        // be invoked when we're done so that the caller can drop the pulse wakelock.
98        mPulseCallback = callback;
99        mHandler.post(mPulseIn);
100    }
101
102    public boolean isPulsing() {
103        return mPulseCallback != null;
104    }
105
106    private void cancelPulsing() {
107        if (DEBUG) Log.d(TAG, "Cancel pulsing");
108
109        if (mPulseCallback != null) {
110            mHandler.removeCallbacks(mPulseIn);
111            mHandler.removeCallbacks(mPulseOut);
112            pulseFinished();
113        }
114    }
115
116    private void pulseStarted() {
117        if (mPulseCallback != null) {
118            mPulseCallback.onPulseStarted();
119        }
120    }
121
122    private void pulseFinished() {
123        if (mPulseCallback != null) {
124            mPulseCallback.onPulseFinished();
125            mPulseCallback = null;
126        }
127    }
128
129    private void abortAnimations() {
130        if (mInFrontAnimator != null) {
131            mInFrontAnimator.cancel();
132        }
133        if (mBehindAnimator != null) {
134            mBehindAnimator.cancel();
135        }
136    }
137
138    private void startScrimAnimation(final boolean inFront, float target, long duration,
139            Interpolator interpolator) {
140        startScrimAnimation(inFront, target, duration, interpolator, 0 /* delay */,
141                null /* endRunnable */);
142    }
143
144    private void startScrimAnimation(final boolean inFront, float target, long duration,
145            Interpolator interpolator, long delay, final Runnable endRunnable) {
146        Animator current = getCurrentAnimator(inFront);
147        if (current != null) {
148            float currentTarget = getCurrentTarget(inFront);
149            if (currentTarget == target) {
150                return;
151            }
152            current.cancel();
153        }
154        ValueAnimator anim = ValueAnimator.ofFloat(getDozeAlpha(inFront), target);
155        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
156            @Override
157            public void onAnimationUpdate(ValueAnimator animation) {
158                float value = (float) animation.getAnimatedValue();
159                setDozeAlpha(inFront, value);
160            }
161        });
162        anim.setInterpolator(interpolator);
163        anim.setDuration(duration);
164        anim.setStartDelay(delay);
165        anim.addListener(new AnimatorListenerAdapter() {
166            @Override
167            public void onAnimationEnd(Animator animation) {
168                setCurrentAnimator(inFront, null);
169                if (endRunnable != null) {
170                    endRunnable.run();
171                }
172            }
173        });
174        anim.start();
175        setCurrentAnimator(inFront, anim);
176        setCurrentTarget(inFront, target);
177    }
178
179    private float getCurrentTarget(boolean inFront) {
180        return inFront ? mInFrontTarget : mBehindTarget;
181    }
182
183    private void setCurrentTarget(boolean inFront, float target) {
184        if (inFront) {
185            mInFrontTarget = target;
186        } else {
187            mBehindTarget = target;
188        }
189    }
190
191    private Animator getCurrentAnimator(boolean inFront) {
192        return inFront ? mInFrontAnimator : mBehindAnimator;
193    }
194
195    private void setCurrentAnimator(boolean inFront, Animator animator) {
196        if (inFront) {
197            mInFrontAnimator = animator;
198        } else {
199            mBehindAnimator = animator;
200        }
201    }
202
203    private void setDozeAlpha(boolean inFront, float alpha) {
204        if (inFront) {
205            mScrimController.setDozeInFrontAlpha(alpha);
206        } else {
207            mScrimController.setDozeBehindAlpha(alpha);
208        }
209    }
210
211    private float getDozeAlpha(boolean inFront) {
212        return inFront
213                ? mScrimController.getDozeInFrontAlpha()
214                : mScrimController.getDozeBehindAlpha();
215    }
216
217    private final Runnable mPulseIn = new Runnable() {
218        @Override
219        public void run() {
220            if (DEBUG) Log.d(TAG, "Pulse in, mDozing=" + mDozing);
221            if (!mDozing) return;
222            DozeLog.tracePulseStart();
223            startScrimAnimation(true /* inFront */, 0f, mDozeParameters.getPulseInDuration(),
224                    mPulseInInterpolator, mDozeParameters.getPulseInDelay(), mPulseInFinished);
225
226            // Signal that the pulse is ready to turn the screen on and draw.
227            pulseStarted();
228        }
229    };
230
231    private final Runnable mPulseInFinished = new Runnable() {
232        @Override
233        public void run() {
234            if (DEBUG) Log.d(TAG, "Pulse in finished, mDozing=" + mDozing);
235            if (!mDozing) return;
236            mHandler.postDelayed(mPulseOut, mDozeParameters.getPulseVisibleDuration());
237        }
238    };
239
240    private final Runnable mPulseOut = new Runnable() {
241        @Override
242        public void run() {
243            if (DEBUG) Log.d(TAG, "Pulse out, mDozing=" + mDozing);
244            if (!mDozing) return;
245            startScrimAnimation(true /* inFront */, 1f, mDozeParameters.getPulseOutDuration(),
246                    mPulseOutInterpolator, 0 /* delay */, mPulseOutFinished);
247        }
248    };
249
250    private final Runnable mPulseOutFinished = new Runnable() {
251        @Override
252        public void run() {
253            if (DEBUG) Log.d(TAG, "Pulse out finished");
254            DozeLog.tracePulseFinish();
255
256            // Signal that the pulse is all finished so we can turn the screen off now.
257            pulseFinished();
258        }
259    };
260}
261