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      1 /*
      2  * Copyright (C) 2013 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;
     18 
     19 import android.content.Context;
     20 import android.util.AttributeSet;
     21 import android.widget.Checkable;
     22 import android.widget.FrameLayout;
     23 
     24 public class CheckableFrameLayout extends FrameLayout implements Checkable {
     25     private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked };
     26     boolean mChecked;
     27 
     28     public CheckableFrameLayout(Context context) {
     29         super(context);
     30     }
     31 
     32     public CheckableFrameLayout(Context context, AttributeSet attrs) {
     33         super(context, attrs);
     34     }
     35 
     36     public CheckableFrameLayout(Context context, AttributeSet attrs, int defStyle) {
     37         super(context, attrs, defStyle);
     38     }
     39 
     40     public boolean isChecked() {
     41         return mChecked;
     42     }
     43 
     44     public void setChecked(boolean checked) {
     45         if (checked != mChecked) {
     46             mChecked = checked;
     47             refreshDrawableState();
     48         }
     49     }
     50 
     51     public void toggle() {
     52         setChecked(!mChecked);
     53     }
     54 
     55     @Override
     56     protected int[] onCreateDrawableState(int extraSpace) {
     57         final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
     58         if (isChecked()) {
     59             mergeDrawableStates(drawableState, CHECKED_STATE_SET);
     60         }
     61         return drawableState;
     62     }
     63 }
     64