1 /* 2 * Copyright (C) 2024 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.wm.shell.draganddrop 18 19 import android.graphics.Insets 20 import android.window.WindowContainerToken 21 import com.android.internal.logging.InstanceId 22 23 /** 24 * Interface to be implemented by classes which want to provide drop targets 25 * for DragAndDrop in Shell 26 */ 27 interface DropTarget { 28 // TODO(b/349828130) Delete after flexible split launches 29 /** 30 * Called at the start of a Drag, before input events are processed. 31 */ startnull32 fun start(dragSession: DragSession, logSessionId: InstanceId) 33 /** 34 * @return [SplitDragPolicy.Target] corresponding to the given coords in display bounds. 35 */ 36 fun getTargetAtLocation(x: Int, y: Int) : SplitDragPolicy.Target 37 /** 38 * @return total number of drop targets for the current drag session. 39 */ 40 fun getNumTargets() : Int 41 // TODO(b/349828130) 42 43 /** 44 * @return [List<SplitDragPolicy.Target>] to show for the current drag session. 45 */ 46 fun getTargets(insets: Insets) : List<SplitDragPolicy.Target> 47 /** 48 * Called when user is hovering Drag object over the given Target 49 */ 50 fun onHoveringOver(target: SplitDragPolicy.Target?) {} 51 /** 52 * Called when the user has dropped the provided target (need not be the same target as 53 * [onHoveringOver]) 54 */ onDroppednull55 fun onDropped(target: SplitDragPolicy.Target, hideTaskToken: WindowContainerToken) 56 }