1package com.android.launcher3.util;
2
3import android.animation.Animator;
4import android.animation.AnimatorListenerAdapter;
5import android.animation.ValueAnimator;
6import android.animation.ValueAnimator.AnimatorUpdateListener;
7import android.annotation.TargetApi;
8import android.os.Build;
9import android.view.View;
10import android.view.ViewOutlineProvider;
11
12import com.android.launcher3.Utilities;
13
14@TargetApi(Build.VERSION_CODES.LOLLIPOP)
15public class UiThreadCircularReveal {
16
17    public static ValueAnimator createCircularReveal(View v, int x, int y, float r0, float r1) {
18        return createCircularReveal(v, x, y, r0, r1, ViewOutlineProvider.BACKGROUND);
19    }
20
21    public static ValueAnimator createCircularReveal(View v, int x, int y, float r0, float r1,
22            final ViewOutlineProvider originalProvider) {
23        ValueAnimator va = ValueAnimator.ofFloat(0f, 1f);
24
25        final View revealView = v;
26        final RevealOutlineProvider outlineProvider = new RevealOutlineProvider(x, y, r0, r1);
27        final float elevation = v.getElevation();
28
29        va.addListener(new AnimatorListenerAdapter() {
30            public void onAnimationStart(Animator animation) {
31                revealView.setOutlineProvider(outlineProvider);
32                revealView.setClipToOutline(true);
33                revealView.setTranslationZ(-elevation);
34            }
35
36            public void onAnimationEnd(Animator animation) {
37                revealView.setOutlineProvider(originalProvider);
38                revealView.setClipToOutline(false);
39                revealView.setTranslationZ(0);
40            }
41
42        });
43
44        va.addUpdateListener(new AnimatorUpdateListener() {
45            @Override
46            public void onAnimationUpdate(ValueAnimator arg0) {
47                float progress = arg0.getAnimatedFraction();
48                outlineProvider.setProgress(progress);
49                revealView.invalidateOutline();
50                if (!Utilities.isLmpMR1OrAbove()) {
51                    revealView.invalidate();
52                }
53            }
54        });
55        return va;
56    }
57}
58