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/*
* Copyright (C) 2017 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.folder;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.FloatArrayEvaluator;
import android.animation.ObjectAnimator;
import android.util.Property;
import java.util.Arrays;
/**
* Animates a Folder preview item.
*/
class FolderPreviewItemAnim {
private static final Property<FolderPreviewItemAnim, float[]> PARAMS =
new Property<FolderPreviewItemAnim, float[]>(float[].class, "params") {
@Override
public float[] get(FolderPreviewItemAnim anim) {
sTempParamsArray[0] = anim.mParams.scale;
sTempParamsArray[1] = anim.mParams.transX;
sTempParamsArray[2] = anim.mParams.transY;
return sTempParamsArray;
}
@Override
public void set(FolderPreviewItemAnim anim, float[] value) {
anim.setParams(value);
}
};
private static PreviewItemDrawingParams sTmpParams = new PreviewItemDrawingParams(0, 0, 0, 0);
private static final float[] sTempParamsArray = new float[3];
private final ObjectAnimator mAnimator;
private final PreviewItemManager mItemManager;
private final PreviewItemDrawingParams mParams;
public final float[] finalState;
/**
* @param params layout params to animate
* @param index0 original index of the item to be animated
* @param items0 original number of items in the preview
* @param index1 new index of the item to be animated
* @param items1 new number of items in the preview
* @param duration duration in ms of the animation
* @param onCompleteRunnable runnable to execute upon animation completion
*/
FolderPreviewItemAnim(PreviewItemManager itemManager,
PreviewItemDrawingParams params, int index0, int items0, int index1, int items1,
int duration, final Runnable onCompleteRunnable) {
mItemManager = itemManager;
mParams = params;
mItemManager.computePreviewItemDrawingParams(index1, items1, sTmpParams);
finalState = new float[] {sTmpParams.scale, sTmpParams.transX, sTmpParams.transY};
mItemManager.computePreviewItemDrawingParams(index0, items0, sTmpParams);
float[] startState = new float[] {sTmpParams.scale, sTmpParams.transX, sTmpParams.transY};
mAnimator = ObjectAnimator.ofObject(this, PARAMS, new FloatArrayEvaluator(),
startState, finalState);
mAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
if (onCompleteRunnable != null) {
onCompleteRunnable.run();
}
params.anim = null;
}
});
mAnimator.setDuration(duration);
}
private void setParams(float[] values) {
mParams.scale = values[0];
mParams.transX = values[1];
mParams.transY = values[2];
mItemManager.onParamsChanged();
}
public void start() {
mAnimator.start();
}
public void cancel() {
mAnimator.cancel();
}
public boolean hasEqualFinalState(FolderPreviewItemAnim anim) {
return Arrays.equals(finalState, anim.finalState);
}
}
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