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
17package com.android.internal.widget;
18
19import android.annotation.Nullable;
20import android.content.Context;
21import android.graphics.Rect;
22import android.util.AttributeSet;
23import android.view.View;
24import android.view.accessibility.AccessibilityNodeInfo;
25import android.widget.Button;
26import android.widget.ImageView;
27import android.widget.RemoteViews;
28
29/**
30 * An expand button in a notification
31 */
32@RemoteViews.RemoteView
33public class NotificationExpandButton extends ImageView {
34    private View mLabeledBy;
35
36    public NotificationExpandButton(Context context) {
37        super(context);
38    }
39
40    public NotificationExpandButton(Context context, @Nullable AttributeSet attrs) {
41        super(context, attrs);
42    }
43
44    public NotificationExpandButton(Context context, @Nullable AttributeSet attrs,
45            int defStyleAttr) {
46        super(context, attrs, defStyleAttr);
47    }
48
49    public NotificationExpandButton(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
50            int defStyleRes) {
51        super(context, attrs, defStyleAttr, defStyleRes);
52    }
53
54    @Override
55    public void getBoundsOnScreen(Rect outRect, boolean clipToParent) {
56        super.getBoundsOnScreen(outRect, clipToParent);
57        extendRectToMinTouchSize(outRect);
58    }
59
60    private void extendRectToMinTouchSize(Rect rect) {
61        int touchTargetSize = (int) (getResources().getDisplayMetrics().density * 48);
62        rect.left = rect.centerX() - touchTargetSize / 2;
63        rect.right = rect.left + touchTargetSize;
64        rect.top = rect.centerY() - touchTargetSize / 2;
65        rect.bottom = rect.top + touchTargetSize;
66    }
67
68    @Override
69    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
70        super.onInitializeAccessibilityNodeInfo(info);
71        info.setClassName(Button.class.getName());
72        if (mLabeledBy != null) {
73            info.setLabeledBy(mLabeledBy);
74        }
75    }
76
77    public void setLabeledBy(View labeledBy) {
78        mLabeledBy = labeledBy;
79    }
80}
81