1/*
2 * Copyright (C) 2008 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 com.android.launcher3;
18
19/**
20 * Handles scrolling while dragging
21 *
22 */
23public interface DragScroller {
24    void scrollLeft();
25    void scrollRight();
26
27    /**
28     * The touch point has entered the scroll area; a scroll is imminent.
29     * This event will only occur while a drag is active.
30     *
31     * @param direction The scroll direction
32     */
33    boolean onEnterScrollArea(int x, int y, int direction);
34
35    /**
36     * The touch point has left the scroll area.
37     * NOTE: This may not be called, if a drop occurs inside the scroll area.
38     */
39    boolean onExitScrollArea();
40}
41