CurvedTranslateAnimation.java revision 787e9dd6c81a2db27cd002ca6672be4279cabe88 
1/*
2 * Copyright (C) 2016 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
17package com.android.server.wm.animation;
18
19import android.animation.KeyframeSet;
20import android.animation.PathKeyframes;
21import android.graphics.Path;
22import android.graphics.PointF;
23import android.view.animation.Animation;
24import android.view.animation.Transformation;
25
26/**
27 * Translate animation which follows a curved path.
28 */
29public class CurvedTranslateAnimation extends Animation {
30
31    private final PathKeyframes mKeyframes;
32
33    public CurvedTranslateAnimation(Path path) {
34        mKeyframes = KeyframeSet.ofPath(path);
35    }
36
37    @Override
38    protected void applyTransformation(float interpolatedTime, Transformation t) {
39        PointF location = (PointF) mKeyframes.getValue(interpolatedTime);
40        t.getMatrix().setTranslate(location.x, location.y);
41    }
42}
43