1 /* 2 * Copyright (C) 2016 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.deskclock.uidata; 18 19 import com.android.deskclock.uidata.UiDataModel.Tab; 20 21 /** 22 * The interface through which interested parties are notified of changes to the vertical scroll 23 * position of the selected tab. Callbacks to listener occur when any of these events occur: 24 * 25 * <ul> 26 * <li>the vertical scroll position of the selected tab is now scrolled to the top</li> 27 * <li>the vertical scroll position of the selected tab is no longer scrolled to the top</li> 28 * <li>the selected tab changed and the new tab scroll state does not match the prior tab</li> 29 * </ul> 30 */ 31 public interface TabScrollListener { 32 33 /** 34 * @param selectedTab an enumerated value indicating the current selected tab 35 * @param scrolledToTop indicates whether the current selected tab is scrolled to its top 36 */ selectedTabScrollToTopChanged(Tab selectedTab, boolean scrolledToTop)37 void selectedTabScrollToTopChanged(Tab selectedTab, boolean scrolledToTop); 38 }