1 /*
2  * Copyright (C) 2014 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 
17 package com.android.systemui.statusbar.policy;
18 
19 import android.view.View;
20 
21 /**
22  * A scroll adapter which can be queried for meta information about the scroll state
23  */
24 public interface ScrollAdapter {
25 
26     /**
27      * @return Whether the view returned by {@link #getHostView()} is scrolled to the top
28      */
isScrolledToTop()29     public boolean isScrolledToTop();
30 
31     /**
32      * @return Whether the view returned by {@link #getHostView()} is scrolled to the bottom
33      */
isScrolledToBottom()34     public boolean isScrolledToBottom();
35 
36     /**
37      * @return The view in which the scrolling is performed
38      */
getHostView()39     public View getHostView();
40 }
41