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author | Daniel Sandler <dsandler@android.com> | 2013-06-05 22:57:57 -0400 |
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committer | Daniel Sandler <dsandler@android.com> | 2013-06-05 23:30:20 -0400 |
commit | 325dc23624160689e59fbac708cf6f222b20d025 (patch) | |
tree | 3c6a13a52a6e5688c7e4404890e5e8f88d544856 /src/com/android/launcher3/FirstFrameAnimatorHelper.java | |
parent | b582cd201fccece65d36b8915cf84fef3546cffa (diff) | |
download | android_packages_apps_Trebuchet-325dc23624160689e59fbac708cf6f222b20d025.tar.gz android_packages_apps_Trebuchet-325dc23624160689e59fbac708cf6f222b20d025.tar.bz2 android_packages_apps_Trebuchet-325dc23624160689e59fbac708cf6f222b20d025.zip |
Launcher2 is now Launcher3.
Changes include
- moving from com.android.launcher{,2} to
com.android.launcher3
- removing wallpapers
- new temporary icon
Change-Id: I1eabd06059e94a8f3bdf6b620777bd1d2b7c212b
Diffstat (limited to 'src/com/android/launcher3/FirstFrameAnimatorHelper.java')
-rw-r--r-- | src/com/android/launcher3/FirstFrameAnimatorHelper.java | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/com/android/launcher3/FirstFrameAnimatorHelper.java b/src/com/android/launcher3/FirstFrameAnimatorHelper.java new file mode 100644 index 000000000..78fdadd4f --- /dev/null +++ b/src/com/android/launcher3/FirstFrameAnimatorHelper.java @@ -0,0 +1,141 @@ +/* + * Copyright (C) 2013 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.launcher3; + +import android.animation.Animator; +import android.animation.AnimatorListenerAdapter; +import android.animation.ValueAnimator; +import android.util.Log; +import android.view.View; +import android.view.ViewPropertyAnimator; +import android.view.ViewTreeObserver; + +/* + * This is a helper class that listens to updates from the corresponding animation. + * For the first two frames, it adjusts the current play time of the animation to + * prevent jank at the beginning of the animation + */ +public class FirstFrameAnimatorHelper extends AnimatorListenerAdapter + implements ValueAnimator.AnimatorUpdateListener { + private static final boolean DEBUG = false; + private static final int MAX_DELAY = 1000; + private static final int IDEAL_FRAME_DURATION = 16; + private View mTarget; + private long mStartFrame; + private long mStartTime = -1; + private boolean mHandlingOnAnimationUpdate; + private boolean mAdjustedSecondFrameTime; + + private static ViewTreeObserver.OnDrawListener sGlobalDrawListener; + private static long sGlobalFrameCounter; + private static boolean sVisible; + + public FirstFrameAnimatorHelper(ValueAnimator animator, View target) { + mTarget = target; + animator.addUpdateListener(this); + } + + public FirstFrameAnimatorHelper(ViewPropertyAnimator vpa, View target) { + mTarget = target; + vpa.setListener(this); + } + + // only used for ViewPropertyAnimators + public void onAnimationStart(Animator animation) { + final ValueAnimator va = (ValueAnimator) animation; + va.addUpdateListener(FirstFrameAnimatorHelper.this); + onAnimationUpdate(va); + } + + public static void setIsVisible(boolean visible) { + sVisible = visible; + } + + public static void initializeDrawListener(View view) { + if (sGlobalDrawListener != null) { + view.getViewTreeObserver().removeOnDrawListener(sGlobalDrawListener); + } + sGlobalDrawListener = new ViewTreeObserver.OnDrawListener() { + private long mTime = System.currentTimeMillis(); + public void onDraw() { + sGlobalFrameCounter++; + if (DEBUG) { + long newTime = System.currentTimeMillis(); + Log.d("FirstFrameAnimatorHelper", "TICK " + (newTime - mTime)); + mTime = newTime; + } + } + }; + view.getViewTreeObserver().addOnDrawListener(sGlobalDrawListener); + sVisible = true; + } + + public void onAnimationUpdate(final ValueAnimator animation) { + final long currentTime = System.currentTimeMillis(); + if (mStartTime == -1) { + mStartFrame = sGlobalFrameCounter; + mStartTime = currentTime; + } + + if (!mHandlingOnAnimationUpdate && + sVisible && + // If the current play time exceeds the duration, the animation + // will get finished, even if we call setCurrentPlayTime -- therefore + // don't adjust the animation in that case + animation.getCurrentPlayTime() < animation.getDuration()) { + mHandlingOnAnimationUpdate = true; + long frameNum = sGlobalFrameCounter - mStartFrame; + // If we haven't drawn our first frame, reset the time to t = 0 + // (give up after MAX_DELAY ms of waiting though - might happen, for example, if we + // are no longer in the foreground and no frames are being rendered ever) + if (frameNum == 0 && currentTime < mStartTime + MAX_DELAY) { + // The first frame on animations doesn't always trigger an invalidate... + // force an invalidate here to make sure the animation continues to advance + mTarget.getRootView().invalidate(); + animation.setCurrentPlayTime(0); + + // For the second frame, if the first frame took more than 16ms, + // adjust the start time and pretend it took only 16ms anyway. This + // prevents a large jump in the animation due to an expensive first frame + } else if (frameNum == 1 && currentTime < mStartTime + MAX_DELAY && + !mAdjustedSecondFrameTime && + currentTime > mStartTime + IDEAL_FRAME_DURATION) { + animation.setCurrentPlayTime(IDEAL_FRAME_DURATION); + mAdjustedSecondFrameTime = true; + } else { + if (frameNum > 1) { + mTarget.post(new Runnable() { + public void run() { + animation.removeUpdateListener(FirstFrameAnimatorHelper.this); + } + }); + } + if (DEBUG) print(animation); + } + mHandlingOnAnimationUpdate = false; + } else { + if (DEBUG) print(animation); + } + } + + public void print(ValueAnimator animation) { + float flatFraction = animation.getCurrentPlayTime() / (float) animation.getDuration(); + Log.d("FirstFrameAnimatorHelper", sGlobalFrameCounter + + "(" + (sGlobalFrameCounter - mStartFrame) + ") " + mTarget + " dirty? " + + mTarget.isDirty() + " " + flatFraction + " " + this + " " + animation); + } +} |