1/*
2 * Copyright (C) 2010 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
17package android.widget;
18
19/**
20 * This interface can be implemented by any collection-type view which has a notion of
21 * progressing through its set of children. The interface exists to give AppWidgetHosts a way of
22 * taking responsibility for automatically advancing such collections.
23 *
24 */
25public interface Advanceable {
26
27    /**
28     * Advances this collection, eg. shows the next view.
29     */
30    public void advance();
31
32    /**
33     * Called by the AppWidgetHost once before it begins to call advance(), allowing the
34     * collection to do any required setup.
35     */
36    public void fyiWillBeAdvancedByHostKThx();
37}
38