1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package android.support.v17.leanback.widget;
15
16import android.content.Context;
17import android.util.AttributeSet;
18import android.widget.Checkable;
19import android.widget.ImageView;
20
21/**
22 * ImageView that supports Checkable states.
23 */
24class CheckableImageView extends ImageView implements Checkable {
25
26    private boolean mChecked;
27
28    private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked };
29
30    public CheckableImageView(Context context) {
31        this(context, null);
32    }
33
34    public CheckableImageView(Context context, AttributeSet attrs) {
35        this(context, attrs, 0);
36    }
37
38    public CheckableImageView(Context context, AttributeSet attrs, int defStyleAttr) {
39        super(context, attrs, defStyleAttr);
40    }
41
42    @Override
43    public int[] onCreateDrawableState(final int extraSpace) {
44        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
45        if (isChecked()) {
46            mergeDrawableStates(drawableState, CHECKED_STATE_SET);
47        }
48        return drawableState;
49    }
50
51    @Override
52    public void toggle() {
53        setChecked(!mChecked);
54    }
55
56    @Override
57    public boolean isChecked() {
58        return mChecked;
59    }
60
61    @Override
62    public void setChecked(final boolean checked) {
63        if (mChecked != checked) {
64            mChecked = checked;
65            refreshDrawableState();
66        }
67    }
68
69}
70