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.Rect;
20 import android.view.View;
21 import android.view.View.OnFocusChangeListener;
22 
23 import com.android.launcher3.R;
24 
25 /**
26  * A helper class to draw background of a focused view.
27  */
28 public abstract class FocusIndicatorHelper extends ItemFocusIndicatorHelper<View>
29         implements OnFocusChangeListener {
30 
FocusIndicatorHelper(View container)31     public FocusIndicatorHelper(View container) {
32         super(container, container.getResources().getColor(R.color.focused_background));
33     }
34 
35     @Override
onFocusChange(View v, boolean hasFocus)36     public void onFocusChange(View v, boolean hasFocus) {
37         changeFocus(v, hasFocus);
38     }
39 
40     @Override
shouldDraw(View item)41     protected boolean shouldDraw(View item) {
42         return item.isAttachedToWindow();
43     }
44 
45     /**
46      * Simple subclass which assumes that the target view is a child of the container.
47      */
48     public static class SimpleFocusIndicatorHelper extends FocusIndicatorHelper {
49 
SimpleFocusIndicatorHelper(View container)50         public SimpleFocusIndicatorHelper(View container) {
51             super(container);
52         }
53 
54         @Override
viewToRect(View v, Rect outRect)55         public void viewToRect(View v, Rect outRect) {
56             outRect.set(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
57         }
58     }
59 }
60