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
19import android.view.View;
20
21import com.android.launcher3.DropTarget.DragObject;
22
23/**
24 * Interface defining an object that can originate a drag.
25 */
26public interface DragSource {
27
28    /**
29     * @return whether items dragged from this source supports
30     */
31    boolean supportsFlingToDelete();
32
33    /**
34     * @return whether items dragged from this source supports 'App Info'
35     */
36    boolean supportsAppInfoDropTarget();
37
38    /**
39     * @return whether items dragged from this source supports 'Delete' drop target (e.g. to remove
40     * a shortcut.
41     */
42    boolean supportsDeleteDropTarget();
43
44    /*
45     * @return the scale of the icons over the workspace icon size
46     */
47    float getIntrinsicIconScaleFactor();
48
49    /**
50     * A callback specifically made back to the source after an item from this source has been flung
51     * to be deleted on a DropTarget.  In such a situation, this method will be called after
52     * onDropCompleted, and more importantly, after the fling animation has completed.
53     */
54    void onFlingToDeleteCompleted();
55
56    /**
57     * A callback made back to the source after an item from this source has been dropped on a
58     * DropTarget.
59     */
60    void onDropCompleted(View target, DragObject d, boolean isFlingToDelete, boolean success);
61}
62