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 
17 package com.android.launcher3;
18 
19 import android.view.View;
20 
21 import com.android.launcher3.DropTarget.DragObject;
22 import com.android.launcher3.logging.UserEventDispatcher.LogContainerProvider;
23 
24 /**
25  * Interface defining an object that can originate a drag.
26  */
27 public interface DragSource extends LogContainerProvider {
28 
29     /**
30      * @return whether items dragged from this source supports 'App Info'
31      */
supportsAppInfoDropTarget()32     boolean supportsAppInfoDropTarget();
33 
34     /**
35      * @return whether items dragged from this source supports 'Delete' drop target (e.g. to remove
36      * a shortcut.) If this returns false, the drop target will say "Cancel" instead of "Remove."
37      */
supportsDeleteDropTarget()38     boolean supportsDeleteDropTarget();
39 
40     /*
41      * @return the scale of the icons over the workspace icon size
42      */
getIntrinsicIconScaleFactor()43     float getIntrinsicIconScaleFactor();
44 
45     /**
46      * A callback made back to the source after an item from this source has been dropped on a
47      * DropTarget.
48      */
onDropCompleted(View target, DragObject d, boolean isFlingToDelete, boolean success)49     void onDropCompleted(View target, DragObject d, boolean isFlingToDelete, boolean success);
50 }
51