1 /*
2  * Copyright (C) 2015 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 package com.android.messaging.ui.animation;
17 
18 import android.animation.RectEvaluator;
19 import android.animation.TypeEvaluator;
20 import android.graphics.Rect;
21 
22 import com.android.messaging.util.OsUtil;
23 
24 /**
25  * This evaluator can be used to perform type interpolation between <code>Rect</code> values.
26  * It's backward compatible to Api Level 11.
27  */
28 public class RectEvaluatorCompat implements TypeEvaluator<Rect> {
create()29     public static TypeEvaluator<Rect> create() {
30         if (OsUtil.isAtLeastJB_MR2()) {
31             return new RectEvaluator();
32         } else {
33             return new RectEvaluatorCompat();
34         }
35     }
36 
37     @Override
evaluate(float fraction, Rect startValue, Rect endValue)38     public Rect evaluate(float fraction, Rect startValue, Rect endValue) {
39         int left = startValue.left + (int) ((endValue.left - startValue.left) * fraction);
40         int top = startValue.top + (int) ((endValue.top - startValue.top) * fraction);
41         int right = startValue.right + (int) ((endValue.right - startValue.right) * fraction);
42         int bottom = startValue.bottom + (int) ((endValue.bottom - startValue.bottom) * fraction);
43         return new Rect(left, top, right, bottom);
44     }
45 }
46