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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3;
import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import com.android.launcher3.dragndrop.DragOptions;
import com.android.launcher3.folder.Folder;
public class DeleteDropTarget extends ButtonDropTarget {
public DeleteDropTarget(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
// Get the hover color
mHoverColor = getResources().getColor(R.color.delete_target_hover_tint);
setDrawable(R.drawable.ic_remove_shadow);
}
@Override
public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
super.onDragStart(dragObject, options);
setTextBasedOnDragSource(dragObject.dragSource);
}
/** @return true for items that should have a "Remove" action in accessibility. */
public static boolean supportsAccessibleDrop(ItemInfo info) {
return (info instanceof ShortcutInfo)
|| (info instanceof LauncherAppWidgetInfo)
|| (info instanceof FolderInfo);
}
@Override
protected boolean supportsDrop(DragSource source, ItemInfo info) {
return true;
}
/**
* Set the drop target's text to either "Remove" or "Cancel" depending on the drag source.
*/
public void setTextBasedOnDragSource(DragSource dragSource) {
if (!TextUtils.isEmpty(getText())) {
setText(dragSource.supportsDeleteDropTarget() ? R.string.remove_drop_target_label
: android.R.string.cancel);
}
}
@Override
public void completeDrop(DragObject d) {
ItemInfo item = d.dragInfo;
if ((d.dragSource instanceof Workspace) || (d.dragSource instanceof Folder)) {
removeWorkspaceOrFolderItem(mLauncher, item, null);
}
}
/**
* Removes the item from the workspace. If the view is not null, it also removes the view.
*/
public static void removeWorkspaceOrFolderItem(Launcher launcher, ItemInfo item, View view) {
// Remove the item from launcher and the db, we can ignore the containerInfo in this call
// because we already remove the drag view from the folder (if the drag originated from
// a folder) in Folder.beginDrag()
launcher.removeItem(view, item, true /* deleteFromDb */);
launcher.getWorkspace().stripEmptyScreens();
launcher.getDragLayer().announceForAccessibility(launcher.getString(R.string.item_removed));
}
}
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