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/*
* Copyright (C) 2012 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.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.ValueAnimator;
import android.view.View;
import android.view.ViewTreeObserver;
import java.util.HashSet;
import java.util.WeakHashMap;
public class LauncherAnimUtils {
static WeakHashMap<Animator, Object> sAnimators = new WeakHashMap<Animator, Object>();
static Animator.AnimatorListener sEndAnimListener = new Animator.AnimatorListener() {
public void onAnimationStart(Animator animation) {
sAnimators.put(animation, null);
}
public void onAnimationRepeat(Animator animation) {
}
public void onAnimationEnd(Animator animation) {
sAnimators.remove(animation);
}
public void onAnimationCancel(Animator animation) {
sAnimators.remove(animation);
}
};
public static void cancelOnDestroyActivity(Animator a) {
a.addListener(sEndAnimListener);
}
// Helper method. Assumes a draw is pending, and that if the animation's duration is 0
// it should be cancelled
public static void startAnimationAfterNextDraw(final Animator animator, final View view) {
view.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
private boolean mStarted = false;
public void onDraw() {
if (mStarted) return;
mStarted = true;
// Use this as a signal that the animation was cancelled
if (animator.getDuration() == 0) {
return;
}
animator.start();
final ViewTreeObserver.OnDrawListener listener = this;
view.post(new Runnable() {
public void run() {
view.getViewTreeObserver().removeOnDrawListener(listener);
}
});
}
});
}
public static void onDestroyActivity() {
HashSet<Animator> animators = new HashSet<Animator>(sAnimators.keySet());
for (Animator a : animators) {
if (a.isRunning()) {
a.cancel();
}
sAnimators.remove(a);
}
}
public static AnimatorSet createAnimatorSet() {
AnimatorSet anim = new AnimatorSet();
cancelOnDestroyActivity(anim);
return anim;
}
public static ValueAnimator ofFloat(View target, float... values) {
ValueAnimator anim = new ValueAnimator();
anim.setFloatValues(values);
cancelOnDestroyActivity(anim);
return anim;
}
public static ObjectAnimator ofFloat(View target, String propertyName, float... values) {
ObjectAnimator anim = new ObjectAnimator();
anim.setTarget(target);
anim.setPropertyName(propertyName);
anim.setFloatValues(values);
cancelOnDestroyActivity(anim);
// If the animation scale is less than 1f the FirstFrameAnimatorHelper sometimes causes
// the animation to not finish (e.g. opening a Folder will result in the Folder View's
// alpha being stuck somewhere between 0-1f.
if (Launcher.isAnimatorScaleSafe()) {
new FirstFrameAnimatorHelper(anim, target);
}
return anim;
}
public static ObjectAnimator ofPropertyValuesHolder(View target,
PropertyValuesHolder... values) {
ObjectAnimator anim = new ObjectAnimator();
anim.setTarget(target);
anim.setValues(values);
cancelOnDestroyActivity(anim);
// If the animation scale is less than 1f the FirstFrameAnimatorHelper sometimes causes
// the animation to not finish (e.g. opening a Folder will result in the Folder View's
// alpha being stuck somewhere between 0-1f.
if (Launcher.isAnimatorScaleSafe()) {
new FirstFrameAnimatorHelper(anim, target);
}
return anim;
}
public static ObjectAnimator ofPropertyValuesHolder(Object target,
View view, PropertyValuesHolder... values) {
ObjectAnimator anim = new ObjectAnimator();
anim.setTarget(target);
anim.setValues(values);
cancelOnDestroyActivity(anim);
// If the animation scale is less than 1f the FirstFrameAnimatorHelper sometimes causes
// the animation to not finish (e.g. opening a Folder will result in the Folder View's
// alpha being stuck somewhere between 0-1f.
if (Launcher.isAnimatorScaleSafe()) {
new FirstFrameAnimatorHelper(anim, view);
}
return anim;
}
}
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