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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.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 startRadius;
private final float endRadius;
private final Rect startRect;
private final Rect endRect;
private final Rect outline;
private float outlineRadius;
public RoundedRectRevealOutlineProvider(
float startRadius, float endRadius, Rect startRect, Rect endRect) {
this.startRadius = startRadius;
this.endRadius = endRadius;
this.startRect = startRect;
this.endRect = endRect;
outline = new Rect();
}
@Override
public void getOutline(View v, Outline outline) {
outline.setRoundRect(this.outline, outlineRadius);
}
/** Sets the progress, from 0 to 1, of the reveal animation. */
public void setProgress(float progress) {
outlineRadius = (1 - progress) * startRadius + progress * endRadius;
outline.left = (int) ((1 - progress) * startRect.left + progress * endRect.left);
outline.top = (int) ((1 - progress) * startRect.top + progress * endRect.top);
outline.right = (int) ((1 - progress) * startRect.right + progress * endRect.right);
outline.bottom = (int) ((1 - progress) * startRect.bottom + progress * endRect.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 wasCanceled = false;
@Override
public void onAnimationStart(Animator animation) {
revealView.setOutlineProvider(RoundedRectRevealOutlineProvider.this);
revealView.setClipToOutline(true);
}
@Override
public void onAnimationCancel(Animator animation) {
wasCanceled = true;
}
@Override
public void onAnimationEnd(Animator animation) {
if (!wasCanceled) {
revealView.setOutlineProvider(ViewOutlineProvider.BACKGROUND);
revealView.setClipToOutline(false);
}
}
});
valueAnimator.addUpdateListener(
(currentValueAnimator) -> {
float progress = (Float) currentValueAnimator.getAnimatedValue();
setProgress(progress);
revealView.invalidateOutline();
});
return valueAnimator;
}
}
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