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.documentsui.sidebar;
18 
19 import android.content.Context;
20 import android.util.AttributeSet;
21 import android.widget.LinearLayout;
22 
23 import com.android.documentsui.R;
24 
25 public final class RootItemView extends LinearLayout {
26     private static final int[] STATE_HIGHLIGHTED = {R.attr.state_highlighted};
27 
28     private boolean mHighlighted = false;
29 
RootItemView(Context context, AttributeSet attrs)30     public RootItemView(Context context, AttributeSet attrs) {
31         super(context, attrs);
32     }
33 
34     @Override
onCreateDrawableState(int extraSpace)35     public int[] onCreateDrawableState(int extraSpace) {
36         final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
37 
38         if (mHighlighted) {
39             mergeDrawableStates(drawableState, STATE_HIGHLIGHTED);
40         }
41 
42         return drawableState;
43     }
44 
setHighlight(boolean highlight)45     public void setHighlight(boolean highlight) {
46         mHighlighted = highlight;
47         refreshDrawableState();
48     }
49 
50     /**
51      * Synthesizes pressed state to trick RippleDrawable starting a ripple effect.
52      */
drawRipple()53     public void drawRipple() {
54         setPressed(true);
55         setPressed(false);
56     }
57 }
58