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 */
16package com.android.messaging.ui.animation;
17
18import android.animation.RectEvaluator;
19import android.animation.TypeEvaluator;
20import android.graphics.Rect;
21
22import 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 */
28public class RectEvaluatorCompat implements TypeEvaluator<Rect> {
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
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