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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.systemui.statusbar.phone;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.util.Log;
import android.view.View;
import android.view.ViewTreeObserver;
import android.view.animation.AnimationUtils;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import com.android.systemui.R;
/**
* Controls both the scrim behind the notifications and in front of the notifications (when a
* security method gets shown).
*/
public class ScrimController implements ViewTreeObserver.OnPreDrawListener {
private static final String TAG = "ScrimController";
private static final boolean DEBUG = false;
public static final long ANIMATION_DURATION = 220;
private static final float SCRIM_BEHIND_ALPHA = 0.62f;
private static final float SCRIM_BEHIND_ALPHA_KEYGUARD = 0.55f;
private static final float SCRIM_BEHIND_ALPHA_UNLOCKING = 0.2f;
private static final float SCRIM_IN_FRONT_ALPHA = 0.75f;
private static final int TAG_KEY_ANIM = R.id.scrim;
private static final long PULSE_IN_ANIMATION_DURATION = 1000;
private static final long PULSE_VISIBLE_DURATION = 3000;
private static final long PULSE_OUT_ANIMATION_DURATION = 1000;
private static final long PULSE_INVISIBLE_DURATION = 1000;
private static final long PULSE_DURATION = PULSE_IN_ANIMATION_DURATION
+ PULSE_VISIBLE_DURATION + PULSE_OUT_ANIMATION_DURATION + PULSE_INVISIBLE_DURATION;
private static final long PRE_PULSE_DELAY = 1000;
private final View mScrimBehind;
private final View mScrimInFront;
private final UnlockMethodCache mUnlockMethodCache;
private boolean mKeyguardShowing;
private float mFraction;
private boolean mDarkenWhileDragging;
private boolean mBouncerShowing;
private boolean mAnimateChange;
private boolean mUpdatePending;
private boolean mExpanding;
private boolean mAnimateKeyguardFadingOut;
private long mDurationOverride = -1;
private long mAnimationDelay;
private Runnable mOnAnimationFinished;
private boolean mAnimationStarted;
private boolean mDozing;
private int mPulsesRemaining;
private final Interpolator mInterpolator = new DecelerateInterpolator();
private final Interpolator mLinearOutSlowInInterpolator;
public ScrimController(View scrimBehind, View scrimInFront) {
mScrimBehind = scrimBehind;
mScrimInFront = scrimInFront;
mUnlockMethodCache = UnlockMethodCache.getInstance(scrimBehind.getContext());
mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(scrimBehind.getContext(),
android.R.interpolator.linear_out_slow_in);
}
public void setKeyguardShowing(boolean showing) {
mKeyguardShowing = showing;
scheduleUpdate();
}
public void onTrackingStarted() {
mExpanding = true;
mDarkenWhileDragging = !mUnlockMethodCache.isMethodInsecure();
}
public void onExpandingFinished() {
mExpanding = false;
}
public void setPanelExpansion(float fraction) {
if (mFraction != fraction) {
mFraction = fraction;
scheduleUpdate();
}
}
public void setBouncerShowing(boolean showing) {
mBouncerShowing = showing;
mAnimateChange = !mExpanding;
scheduleUpdate();
}
public void animateKeyguardFadingOut(long delay, long duration, Runnable onAnimationFinished) {
mAnimateKeyguardFadingOut = true;
mDurationOverride = duration;
mAnimationDelay = delay;
mAnimateChange = true;
mOnAnimationFinished = onAnimationFinished;
scheduleUpdate();
}
public void animateGoingToFullShade(long delay, long duration) {
mDurationOverride = duration;
mAnimationDelay = delay;
mAnimateChange = true;
scheduleUpdate();
}
public void setDozing(boolean dozing) {
if (mDozing == dozing) return;
mDozing = dozing;
if (!mDozing) {
cancelPulsing();
mAnimateChange = true;
}
scheduleUpdate();
}
/** When dozing, fade screen contents in and out a few times using the front scrim. */
public long pulse(int pulses, boolean delayed) {
if (!mDozing) return 0;
mPulsesRemaining = Math.max(pulses, mPulsesRemaining);
final long delay = delayed ? PRE_PULSE_DELAY : 0;
mScrimInFront.postDelayed(mPulseIn, delay);
return delay + mPulsesRemaining * PULSE_DURATION;
}
private void cancelPulsing() {
mPulsesRemaining = 0;
mScrimInFront.removeCallbacks(mPulseIn);
mScrimInFront.removeCallbacks(mPulseOut);
}
private void scheduleUpdate() {
if (mUpdatePending) return;
// Make sure that a frame gets scheduled.
mScrimBehind.invalidate();
mScrimBehind.getViewTreeObserver().addOnPreDrawListener(this);
mUpdatePending = true;
}
private void updateScrims() {
if (mAnimateKeyguardFadingOut) {
setScrimInFrontColor(0f);
setScrimBehindColor(0f);
} else if (!mKeyguardShowing && !mBouncerShowing) {
updateScrimNormal();
setScrimInFrontColor(0);
} else {
updateScrimKeyguard();
}
mAnimateChange = false;
}
private void updateScrimKeyguard() {
if (mExpanding && mDarkenWhileDragging) {
float behindFraction = Math.max(0, Math.min(mFraction, 1));
float fraction = 1 - behindFraction;
fraction = (float) Math.pow(fraction, 0.8f);
behindFraction = (float) Math.pow(behindFraction, 0.8f);
setScrimInFrontColor(fraction * SCRIM_IN_FRONT_ALPHA);
setScrimBehindColor(behindFraction * SCRIM_BEHIND_ALPHA_KEYGUARD);
} else if (mBouncerShowing) {
setScrimInFrontColor(SCRIM_IN_FRONT_ALPHA);
setScrimBehindColor(0f);
} else if (mDozing) {
setScrimInFrontColor(1);
} else {
float fraction = Math.max(0, Math.min(mFraction, 1));
setScrimInFrontColor(0f);
setScrimBehindColor(fraction
* (SCRIM_BEHIND_ALPHA_KEYGUARD - SCRIM_BEHIND_ALPHA_UNLOCKING)
+ SCRIM_BEHIND_ALPHA_UNLOCKING);
}
}
private void updateScrimNormal() {
float frac = mFraction;
// let's start this 20% of the way down the screen
frac = frac * 1.2f - 0.2f;
if (frac <= 0) {
setScrimBehindColor(0);
} else {
// woo, special effects
final float k = (float)(1f-0.5f*(1f-Math.cos(3.14159f * Math.pow(1f-frac, 2f))));
setScrimBehindColor(k * SCRIM_BEHIND_ALPHA);
}
}
private void setScrimBehindColor(float alpha) {
setScrimColor(mScrimBehind, alpha);
}
private void setScrimInFrontColor(float alpha) {
setScrimColor(mScrimInFront, alpha);
if (alpha == 0f) {
mScrimInFront.setClickable(false);
} else {
// Eat touch events (unless dozing).
mScrimInFront.setClickable(!mDozing);
}
}
private void setScrimColor(View scrim, float alpha) {
int color = Color.argb((int) (alpha * 255), 0, 0, 0);
if (mAnimateChange) {
startScrimAnimation(scrim, color);
} else {
scrim.setBackgroundColor(color);
}
}
private void startScrimAnimation(final View scrim, int targetColor) {
int current = getBackgroundAlpha(scrim);
int target = Color.alpha(targetColor);
if (current == targetColor) {
return;
}
Object runningAnim = scrim.getTag(TAG_KEY_ANIM);
if (runningAnim instanceof ValueAnimator) {
((ValueAnimator) runningAnim).cancel();
}
ValueAnimator anim = ValueAnimator.ofInt(current, target);
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
int value = (int) animation.getAnimatedValue();
scrim.setBackgroundColor(Color.argb(value, 0, 0, 0));
}
});
anim.setInterpolator(mAnimateKeyguardFadingOut
? mLinearOutSlowInInterpolator
: mInterpolator);
anim.setStartDelay(mAnimationDelay);
anim.setDuration(mDurationOverride != -1 ? mDurationOverride : ANIMATION_DURATION);
anim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
if (mOnAnimationFinished != null) {
mOnAnimationFinished.run();
mOnAnimationFinished = null;
}
scrim.setTag(TAG_KEY_ANIM, null);
}
});
anim.start();
scrim.setTag(TAG_KEY_ANIM, anim);
mAnimationStarted = true;
}
private int getBackgroundAlpha(View scrim) {
if (scrim.getBackground() instanceof ColorDrawable) {
ColorDrawable drawable = (ColorDrawable) scrim.getBackground();
return Color.alpha(drawable.getColor());
} else {
return 0;
}
}
@Override
public boolean onPreDraw() {
mScrimBehind.getViewTreeObserver().removeOnPreDrawListener(this);
mUpdatePending = false;
updateScrims();
mAnimateKeyguardFadingOut = false;
mDurationOverride = -1;
mAnimationDelay = 0;
// Make sure that we always call the listener even if we didn't start an animation.
if (!mAnimationStarted && mOnAnimationFinished != null) {
mOnAnimationFinished.run();
mOnAnimationFinished = null;
}
mAnimationStarted = false;
return true;
}
private final Runnable mPulseIn = new Runnable() {
@Override
public void run() {
if (DEBUG) Log.d(TAG, "Pulse in, mDozing=" + mDozing
+ " mPulsesRemaining=" + mPulsesRemaining);
if (!mDozing || mPulsesRemaining == 0) return;
mPulsesRemaining--;
mDurationOverride = PULSE_IN_ANIMATION_DURATION;
mAnimationDelay = 0;
mAnimateChange = true;
mOnAnimationFinished = mPulseInFinished;
setScrimColor(mScrimInFront, 0);
}
};
private final Runnable mPulseInFinished = new Runnable() {
@Override
public void run() {
if (DEBUG) Log.d(TAG, "Pulse in finished, mDozing=" + mDozing);
if (!mDozing) return;
mScrimInFront.postDelayed(mPulseOut, PULSE_VISIBLE_DURATION);
}
};
private final Runnable mPulseOut = new Runnable() {
@Override
public void run() {
if (DEBUG) Log.d(TAG, "Pulse out, mDozing=" + mDozing);
if (!mDozing) return;
mDurationOverride = PULSE_OUT_ANIMATION_DURATION;
mAnimationDelay = 0;
mAnimateChange = true;
mOnAnimationFinished = mPulseOutFinished;
setScrimColor(mScrimInFront, 1);
}
};
private final Runnable mPulseOutFinished = new Runnable() {
@Override
public void run() {
if (DEBUG) Log.d(TAG, "Pulse out finished, mPulsesRemaining=" + mPulsesRemaining);
if (mPulsesRemaining > 0) {
mScrimInFront.postDelayed(mPulseIn, PULSE_INVISIBLE_DURATION);
}
}
};
}