1/*
2 * Copyright (C) 2015 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.contacts.editor;
18
19import android.view.View;
20import android.view.View.AccessibilityDelegate;
21import android.view.ViewGroup;
22import android.view.accessibility.AccessibilityEvent;
23
24/**
25 * This is an AccessibilityDelegate that filters out the TYPE_VIEW_SELECTED event.
26 */
27public class ViewSelectedFilter extends AccessibilityDelegate {
28    private View mView; //the view we don't want TYPE_VIEW_SELECTED event to fire.
29
30    private ViewSelectedFilter(View view) {
31        super();
32        mView = view;
33    }
34
35    /**
36     * AccessibilityEvent can only be suppressed at a view's parent, so this function adds the
37     * delegate to the view's parent.
38     * @param view the view whose TYPE_VIEW_SELECTED event should be suppressed.
39     */
40    public static void suppressViewSelectedEvent(View view) {
41        final View parent = (View) view.getParent();
42        parent.setAccessibilityDelegate(new ViewSelectedFilter(view));
43    }
44
45    @Override
46    public boolean onRequestSendAccessibilityEvent(
47            ViewGroup host, View child,AccessibilityEvent event) {
48        if (child == mView && event.getEventType() == AccessibilityEvent.TYPE_VIEW_SELECTED) {
49            return false;
50        }
51        return super.onRequestSendAccessibilityEvent(host, child, event);
52    }
53}
54