diff options
Diffstat (limited to 'java/com/android/newbubble/RoundedRectRevealOutlineProvider.java')
-rw-r--r-- | java/com/android/newbubble/RoundedRectRevealOutlineProvider.java | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/java/com/android/newbubble/RoundedRectRevealOutlineProvider.java b/java/com/android/newbubble/RoundedRectRevealOutlineProvider.java new file mode 100644 index 000000000..d204e0f1c --- /dev/null +++ b/java/com/android/newbubble/RoundedRectRevealOutlineProvider.java @@ -0,0 +1,105 @@ +/* + * 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; + } +} |