1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5 * except 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
10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11 * KIND, either express or implied. See the License for the specific language governing
12 * permissions and limitations under the License.
13 */
14
15package com.android.systemui.qs;
16
17import android.content.Context;
18import android.util.AttributeSet;
19import android.view.MotionEvent;
20import android.widget.ScrollView;
21
22/**
23 * ScrollView that disallows intercepting for touches that can cause scrolling.
24 */
25public class NonInterceptingScrollView extends ScrollView {
26
27    public NonInterceptingScrollView(Context context, AttributeSet attrs) {
28        super(context, attrs);
29    }
30
31    @Override
32    public boolean onTouchEvent(MotionEvent ev) {
33        int action = ev.getActionMasked();
34        switch (action) {
35            case MotionEvent.ACTION_DOWN:
36                if (canScrollVertically(1)) {
37                    requestDisallowInterceptTouchEvent(true);
38                }
39                break;
40        }
41        return super.onTouchEvent(ev);
42    }
43}
44