2 * Copyright (C) 2008 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package com.android.launcher3;
19 import android.view.View;
21 import com.android.launcher3.DropTarget.DragObject;
24 * Interface defining an object that can originate a drag.
26 public interface DragSource {
29 * @return whether items dragged from this source supports
31 boolean supportsFlingToDelete();
34 * @return whether items dragged from this source supports 'App Info'
36 boolean supportsAppInfoDropTarget();
39 * @return whether items dragged from this source supports 'Delete' drop target (e.g. to remove
42 boolean supportsDeleteDropTarget();
45 * @return the scale of the icons over the workspace icon size
47 float getIntrinsicIconScaleFactor();
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.
54 void onFlingToDeleteCompleted();
57 * A callback made back to the source after an item from this source has been dropped on a
60 void onDropCompleted(View target, DragObject d, boolean isFlingToDelete, boolean success);