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.launcher3.keyboard;
18 
19 import android.graphics.Canvas;
20 import android.view.View;
21 import android.view.View.OnFocusChangeListener;
22 
23 import androidx.recyclerview.widget.RecyclerView;
24 import androidx.recyclerview.widget.RecyclerView.ItemDecoration;
25 import androidx.recyclerview.widget.RecyclerView.State;
26 
27 import com.android.launcher3.keyboard.FocusIndicatorHelper.SimpleFocusIndicatorHelper;
28 
29 /**
30  * {@link ItemDecoration} for drawing and animating focused view background.
31  */
32 public class FocusedItemDecorator extends ItemDecoration {
33 
34     private FocusIndicatorHelper mHelper;
35 
FocusedItemDecorator(View container)36     public FocusedItemDecorator(View container) {
37         mHelper = new SimpleFocusIndicatorHelper(container);
38     }
39 
FocusedItemDecorator(FocusIndicatorHelper focusIndicatorHelper)40     public FocusedItemDecorator(FocusIndicatorHelper focusIndicatorHelper) {
41         mHelper = focusIndicatorHelper;
42     }
43 
getFocusListener()44     public OnFocusChangeListener getFocusListener() {
45         return mHelper;
46     }
47 
48     @Override
onDrawOver(Canvas c, RecyclerView parent, State state)49     public void onDrawOver(Canvas c, RecyclerView parent, State state) {
50         // Use onDrawOver so focus outline is always visible
51         mHelper.draw(c);
52     }
53 }
54