| /* |
| * 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); |
| |
| } |
| } |