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 
15 package com.android.systemui.qs;
16 
17 import android.content.Context;
18 import android.util.AttributeSet;
19 import android.view.MotionEvent;
20 import android.widget.ScrollView;
21 
22 /**
23  * ScrollView that disallows intercepting for touches that can cause scrolling.
24  */
25 public class NonInterceptingScrollView extends ScrollView {
26 
NonInterceptingScrollView(Context context, AttributeSet attrs)27     public NonInterceptingScrollView(Context context, AttributeSet attrs) {
28         super(context, attrs);
29     }
30 
31     @Override
onTouchEvent(MotionEvent ev)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