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 23 /** 24 * Interface defining an object that can originate a drag. 25 * 26 */ 27 public interface DragSource { 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
