CustomInterpolatorTransformation.java revision 5be6f33996ed50f382f46a392a5a5f74d4c020eb 
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
17package com.android.systemui.statusbar.notification;
18
19import android.view.View;
20import android.view.animation.Interpolator;
21
22import com.android.systemui.Interpolators;
23import com.android.systemui.statusbar.CrossFadeHelper;
24import com.android.systemui.statusbar.TransformableView;
25import com.android.systemui.statusbar.ViewTransformationHelper;
26
27import static com.android.systemui.statusbar.TransformableView.TRANSFORMING_VIEW_TITLE;
28import static com.android.systemui.statusbar.notification.TransformState.TRANSFORM_Y;
29
30/**
31 * A custom transformation that modifies the interpolator
32 */
33public abstract class CustomInterpolatorTransformation
34        extends ViewTransformationHelper.CustomTransformation {
35
36    private final int mViewType;
37
38    public CustomInterpolatorTransformation(int viewType) {
39        mViewType = viewType;
40    }
41
42    @Override
43    public boolean transformTo(TransformState ownState, TransformableView notification,
44            float transformationAmount) {
45        if (!hasCustomTransformation()) {
46            return false;
47        }
48        TransformState otherState = notification.getCurrentState(mViewType);
49        if (otherState == null) {
50            return false;
51        }
52        View view = ownState.getTransformedView();
53        CrossFadeHelper.fadeOut(view, transformationAmount);
54        ownState.transformViewFullyTo(otherState, this, transformationAmount);
55        otherState.recycle();
56        return true;
57    }
58
59    protected boolean hasCustomTransformation() {
60        return true;
61    }
62
63    @Override
64    public boolean transformFrom(TransformState ownState,
65            TransformableView notification, float transformationAmount) {
66        if (!hasCustomTransformation()) {
67            return false;
68        }
69        TransformState otherState = notification.getCurrentState(mViewType);
70        if (otherState == null) {
71            return false;
72        }
73        View view = ownState.getTransformedView();
74        CrossFadeHelper.fadeIn(view, transformationAmount);
75        ownState.transformViewFullyFrom(otherState, this, transformationAmount);
76        otherState.recycle();
77        return true;
78    }
79}
80