| /* |
| * 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.newbubble; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.animation.ValueAnimator; |
| import android.graphics.Outline; |
| import android.graphics.Rect; |
| import android.view.View; |
| import android.view.ViewOutlineProvider; |
| |
| /** |
| * A {@link ViewOutlineProvider} that provides an outline that interpolates between two radii and |
| * two {@link Rect}s. |
| * |
| * <p>An example usage of this provider is an outline that starts out as a circle and ends as a |
| * rounded rectangle. |
| */ |
| public class RoundedRectRevealOutlineProvider extends ViewOutlineProvider { |
| private final float mStartRadius; |
| private final float mEndRadius; |
| |
| private final Rect mStartRect; |
| private final Rect mEndRect; |
| |
| private final Rect mOutline; |
| private float mOutlineRadius; |
| |
| public RoundedRectRevealOutlineProvider( |
| float startRadius, float endRadius, Rect startRect, Rect endRect) { |
| mStartRadius = startRadius; |
| mEndRadius = endRadius; |
| mStartRect = startRect; |
| mEndRect = endRect; |
| |
| mOutline = new Rect(); |
| } |
| |
| @Override |
| public void getOutline(View v, Outline outline) { |
| outline.setRoundRect(mOutline, mOutlineRadius); |
| } |
| |
| /** Sets the progress, from 0 to 1, of the reveal animation. */ |
| public void setProgress(float progress) { |
| mOutlineRadius = (1 - progress) * mStartRadius + progress * mEndRadius; |
| |
| mOutline.left = (int) ((1 - progress) * mStartRect.left + progress * mEndRect.left); |
| mOutline.top = (int) ((1 - progress) * mStartRect.top + progress * mEndRect.top); |
| mOutline.right = (int) ((1 - progress) * mStartRect.right + progress * mEndRect.right); |
| mOutline.bottom = (int) ((1 - progress) * mStartRect.bottom + progress * mEndRect.bottom); |
| } |
| |
| ValueAnimator createRevealAnimator(final View revealView, boolean isReversed) { |
| ValueAnimator valueAnimator = |
| isReversed ? ValueAnimator.ofFloat(1f, 0f) : ValueAnimator.ofFloat(0f, 1f); |
| |
| valueAnimator.addListener( |
| new AnimatorListenerAdapter() { |
| private boolean mWasCanceled = false; |
| |
| @Override |
| public void onAnimationStart(Animator animation) { |
| revealView.setOutlineProvider(RoundedRectRevealOutlineProvider.this); |
| revealView.setClipToOutline(true); |
| } |
| |
| @Override |
| public void onAnimationCancel(Animator animation) { |
| mWasCanceled = true; |
| } |
| |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| if (!mWasCanceled) { |
| revealView.setOutlineProvider(ViewOutlineProvider.BACKGROUND); |
| revealView.setClipToOutline(false); |
| } |
| } |
| }); |
| |
| valueAnimator.addUpdateListener( |
| (currentValueAnimator) -> { |
| float progress = (Float) currentValueAnimator.getAnimatedValue(); |
| setProgress(progress); |
| revealView.invalidateOutline(); |
| }); |
| return valueAnimator; |
| } |
| } |