/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.folder;
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import android.animation.Animator;
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import android.animation.AnimatorListenerAdapter;
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import android.animation.FloatArrayEvaluator;
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import android.animation.ObjectAnimator;
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import android.util.Property;
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import java.util.Arrays;
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/**
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* Animates a Folder preview item.
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*/
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class FolderPreviewItemAnim {
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private static final Property<FolderPreviewItemAnim, float[]> PARAMS =
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new Property<FolderPreviewItemAnim, float[]>(float[].class, "params") {
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@Override
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public float[] get(FolderPreviewItemAnim anim) {
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sTempParamsArray[0] = anim.mParams.scale;
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sTempParamsArray[1] = anim.mParams.transX;
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sTempParamsArray[2] = anim.mParams.transY;
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return sTempParamsArray;
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}
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@Override
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public void set(FolderPreviewItemAnim anim, float[] value) {
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anim.setParams(value);
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}
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};
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private static PreviewItemDrawingParams sTmpParams = new PreviewItemDrawingParams(0, 0, 0, 0);
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private static final float[] sTempParamsArray = new float[3];
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private final ObjectAnimator mAnimator;
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private final PreviewItemManager mItemManager;
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private final PreviewItemDrawingParams mParams;
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public final float[] finalState;
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/**
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* @param params layout params to animate
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* @param index0 original index of the item to be animated
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* @param items0 original number of items in the preview
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* @param index1 new index of the item to be animated
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* @param items1 new number of items in the preview
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* @param duration duration in ms of the animation
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* @param onCompleteRunnable runnable to execute upon animation completion
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*/
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FolderPreviewItemAnim(PreviewItemManager itemManager,
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PreviewItemDrawingParams params, int index0, int items0, int index1, int items1,
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int duration, final Runnable onCompleteRunnable) {
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mItemManager = itemManager;
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mParams = params;
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mItemManager.computePreviewItemDrawingParams(index1, items1, sTmpParams);
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finalState = new float[] {sTmpParams.scale, sTmpParams.transX, sTmpParams.transY};
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mItemManager.computePreviewItemDrawingParams(index0, items0, sTmpParams);
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float[] startState = new float[] {sTmpParams.scale, sTmpParams.transX, sTmpParams.transY};
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mAnimator = ObjectAnimator.ofObject(this, PARAMS, new FloatArrayEvaluator(),
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startState, finalState);
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mAnimator.addListener(new AnimatorListenerAdapter() {
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@Override
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public void onAnimationEnd(Animator animation) {
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if (onCompleteRunnable != null) {
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onCompleteRunnable.run();
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}
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params.anim = null;
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}
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});
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mAnimator.setDuration(duration);
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}
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private void setParams(float[] values) {
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mParams.scale = values[0];
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mParams.transX = values[1];
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mParams.transY = values[2];
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mItemManager.onParamsChanged();
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}
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public void start() {
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mAnimator.start();
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}
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public void cancel() {
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mAnimator.cancel();
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}
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public boolean hasEqualFinalState(FolderPreviewItemAnim anim) {
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return Arrays.equals(finalState, anim.finalState);
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}
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}
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