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