1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.launcher3.anim;
18 
19 import android.graphics.Rect;
20 
21 /**
22  * A {@link RevealOutlineAnimation} that provides an outline that interpolates between two radii
23  * and two {@link Rect}s.
24  *
25  * An example usage of this provider is an outline that starts out as a circle and ends
26  * as a rounded rectangle.
27  */
28 public class RoundedRectRevealOutlineProvider extends RevealOutlineAnimation {
29     private final float mStartRadius;
30     private final float mEndRadius;
31 
32     private final Rect mStartRect;
33     private final Rect mEndRect;
34 
RoundedRectRevealOutlineProvider(float startRadius, float endRadius, Rect startRect, Rect endRect)35     public RoundedRectRevealOutlineProvider(float startRadius, float endRadius, Rect startRect,
36             Rect endRect) {
37         mStartRadius = startRadius;
38         mEndRadius = endRadius;
39         mStartRect = startRect;
40         mEndRect = endRect;
41     }
42 
43     @Override
shouldRemoveElevationDuringAnimation()44     public boolean shouldRemoveElevationDuringAnimation() {
45         return false;
46     }
47 
48     @Override
setProgress(float progress)49     public void setProgress(float progress) {
50         mOutlineRadius = (1 - progress) * mStartRadius + progress * mEndRadius;
51 
52         mOutline.left = (int) ((1 - progress) * mStartRect.left + progress * mEndRect.left);
53         mOutline.top = (int) ((1 - progress) * mStartRect.top + progress * mEndRect.top);
54         mOutline.right = (int) ((1 - progress) * mStartRect.right + progress * mEndRect.right);
55         mOutline.bottom = (int) ((1 - progress) * mStartRect.bottom + progress * mEndRect.bottom);
56     }
57 }
58