1 /*
2  * Copyright 2021 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 package com.android.car.ui.uxr;
17 
18 import android.content.Context;
19 import android.util.AttributeSet;
20 
21 import androidx.annotation.Nullable;
22 import androidx.constraintlayout.widget.ConstraintLayout;
23 
24 /**
25  * A {@link ConstraintLayout} that implements {@link DrawableStateView}, for allowing additional
26  * states such as ux restriction.
27  */
28 public class DrawableStateConstraintLayout extends ConstraintLayout implements DrawableStateView {
29     private DrawableStateUtil mUtil;
30 
DrawableStateConstraintLayout(Context context)31     public DrawableStateConstraintLayout(Context context) {
32         super(context);
33     }
34 
DrawableStateConstraintLayout(Context context, @Nullable AttributeSet attrs)35     public DrawableStateConstraintLayout(Context context, @Nullable AttributeSet attrs) {
36         super(context, attrs);
37     }
38 
DrawableStateConstraintLayout(Context context, @Nullable AttributeSet attrs, int defStyleAttr)39     public DrawableStateConstraintLayout(Context context,
40             @Nullable AttributeSet attrs, int defStyleAttr) {
41         super(context, attrs, defStyleAttr);
42     }
43 
44     @Override
setExtraDrawableState(@ullable int[] stateToAdd, @Nullable int[] stateToRemove)45     public void setExtraDrawableState(@Nullable int[] stateToAdd, @Nullable int[] stateToRemove) {
46         if (mUtil == null) {
47             mUtil = new DrawableStateUtil(this);
48         }
49         mUtil.setExtraDrawableState(stateToAdd, stateToRemove);
50     }
51 
52     @Override
onCreateDrawableState(int extraSpace)53     public int[] onCreateDrawableState(int extraSpace) {
54         if (mUtil == null) {
55             mUtil = new DrawableStateUtil(this);
56         }
57         return mUtil.onCreateDrawableState(extraSpace, space -> super.onCreateDrawableState(space));
58     }
59 }
60