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