1 /* 2 * Copyright (C) 2011 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.content.Context; 20 import android.text.TextUtils; 21 import android.util.AttributeSet; 22 import android.view.View; 23 24 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate; 25 import com.android.launcher3.dragndrop.DragOptions; 26 import com.android.launcher3.folder.Folder; 27 import com.android.launcher3.logging.LoggerUtils; 28 import com.android.launcher3.userevent.nano.LauncherLogProto.ControlType; 29 import com.android.launcher3.userevent.nano.LauncherLogProto.Target; 30 31 public class DeleteDropTarget extends ButtonDropTarget { 32 33 private int mControlType = ControlType.DEFAULT_CONTROLTYPE; 34 DeleteDropTarget(Context context, AttributeSet attrs)35 public DeleteDropTarget(Context context, AttributeSet attrs) { 36 this(context, attrs, 0); 37 } 38 DeleteDropTarget(Context context, AttributeSet attrs, int defStyle)39 public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) { 40 super(context, attrs, defStyle); 41 } 42 43 @Override onFinishInflate()44 protected void onFinishInflate() { 45 super.onFinishInflate(); 46 // Get the hover color 47 mHoverColor = getResources().getColor(R.color.delete_target_hover_tint); 48 49 setDrawable(R.drawable.ic_remove_shadow); 50 } 51 52 @Override onDragStart(DropTarget.DragObject dragObject, DragOptions options)53 public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) { 54 super.onDragStart(dragObject, options); 55 setTextBasedOnDragSource(dragObject.dragInfo); 56 setControlTypeBasedOnDragSource(dragObject.dragInfo); 57 } 58 59 /** 60 * @return true for items that should have a "Remove" action in accessibility. 61 */ 62 @Override supportsAccessibilityDrop(ItemInfo info, View view)63 public boolean supportsAccessibilityDrop(ItemInfo info, View view) { 64 return (info instanceof ShortcutInfo) 65 || (info instanceof LauncherAppWidgetInfo) 66 || (info instanceof FolderInfo); 67 } 68 69 @Override getAccessibilityAction()70 public int getAccessibilityAction() { 71 return LauncherAccessibilityDelegate.REMOVE; 72 } 73 74 @Override supportsDrop(ItemInfo info)75 protected boolean supportsDrop(ItemInfo info) { 76 return true; 77 } 78 79 /** 80 * Set the drop target's text to either "Remove" or "Cancel" depending on the drag item. 81 */ setTextBasedOnDragSource(ItemInfo item)82 private void setTextBasedOnDragSource(ItemInfo item) { 83 if (!TextUtils.isEmpty(mText)) { 84 mText = getResources().getString(item.id != ItemInfo.NO_ID 85 ? R.string.remove_drop_target_label 86 : android.R.string.cancel); 87 requestLayout(); 88 } 89 } 90 91 /** 92 * Set mControlType depending on the drag item. 93 */ setControlTypeBasedOnDragSource(ItemInfo item)94 private void setControlTypeBasedOnDragSource(ItemInfo item) { 95 mControlType = item.id != ItemInfo.NO_ID ? ControlType.REMOVE_TARGET 96 : ControlType.CANCEL_TARGET; 97 } 98 99 @Override completeDrop(DragObject d)100 public void completeDrop(DragObject d) { 101 ItemInfo item = d.dragInfo; 102 if ((d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder)) { 103 onAccessibilityDrop(null, item); 104 } 105 } 106 107 /** 108 * Removes the item from the workspace. If the view is not null, it also removes the view. 109 */ 110 @Override onAccessibilityDrop(View view, ItemInfo item)111 public void onAccessibilityDrop(View view, ItemInfo item) { 112 // Remove the item from launcher and the db, we can ignore the containerInfo in this call 113 // because we already remove the drag view from the folder (if the drag originated from 114 // a folder) in Folder.beginDrag() 115 mLauncher.removeItem(view, item, true /* deleteFromDb */); 116 mLauncher.getWorkspace().stripEmptyScreens(); 117 mLauncher.getDragLayer() 118 .announceForAccessibility(getContext().getString(R.string.item_removed)); 119 } 120 121 @Override getDropTargetForLogging()122 public Target getDropTargetForLogging() { 123 Target t = LoggerUtils.newTarget(Target.Type.CONTROL); 124 t.controlType = mControlType; 125 return t; 126 } 127 } 128