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 
17 package com.android.deskclock.widget.toast;
18 
19 import android.content.Context;
20 import androidx.annotation.Keep;
21 import androidx.coordinatorlayout.widget.CoordinatorLayout;
22 import com.google.android.material.snackbar.Snackbar;
23 import android.util.AttributeSet;
24 import android.view.View;
25 
26 /**
27  * Custom {@link CoordinatorLayout.Behavior} that slides with the {@link Snackbar}.
28  */
29 @Keep
30 public final class SnackbarSlidingBehavior extends CoordinatorLayout.Behavior<View> {
31 
SnackbarSlidingBehavior(Context context, AttributeSet attrs)32     public SnackbarSlidingBehavior(Context context, AttributeSet attrs) {
33     }
34 
35     @Override
layoutDependsOn(CoordinatorLayout parent, View child, View dependency)36     public boolean layoutDependsOn(CoordinatorLayout parent, View child, View dependency) {
37         return dependency instanceof Snackbar.SnackbarLayout;
38     }
39 
40     @Override
onDependentViewChanged(CoordinatorLayout parent, View child, View dependency)41     public boolean onDependentViewChanged(CoordinatorLayout parent, View child, View dependency) {
42         updateTranslationY(parent, child);
43         return false;
44     }
45 
46     @Override
onDependentViewRemoved(CoordinatorLayout parent, View child, View dependency)47     public void onDependentViewRemoved(CoordinatorLayout parent, View child, View dependency) {
48         updateTranslationY(parent, child);
49     }
50 
51     @Override
onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection)52     public boolean onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection) {
53         updateTranslationY(parent, child);
54         return false;
55     }
56 
updateTranslationY(CoordinatorLayout parent, View child)57     private void updateTranslationY(CoordinatorLayout parent, View child) {
58         float translationY = 0f;
59         for (View dependency : parent.getDependencies(child)) {
60             translationY = Math.min(translationY, dependency.getY() - child.getBottom());
61         }
62         child.setTranslationY(translationY);
63     }
64 }
65