public function doDragDrop(event:DragEvent): void
{
event.preventDefault();
var myTileList:TileList = TileList(event.target);
myTileList.hideDropFeedback(event);if (event.dragSource.hasFormat(”treeItems”))
{
if (!myTileList.dataProvider)
// Create an empty collection to drop items into.
myTileList.dataProvider = [];

var items:Array = event.dragSource.dataForFormat(”treeItems”) as Array;
for (var i:int = items.length - 1; i >= 0; i–)
{
myTileList.dataProvider.addItemAt(String(items[i].@label), TileList(event.target).calculateDropIndex(event));
}
}
}

public function doDragComplete(event:DragEvent): void
{
event.preventDefault();
if (event.action == DragManager.MOVE && Tree(event.target).dragMoveEnabled)
{
var target:Tree = Tree(event.target)
if (event.relatedObject != this)
{
//if we dropped on another component
//then we need to remove from ourself first
var items:Array = event.dragSource.dataForFormat(”treeItems”) as Array;
var parent:*;
var index:int;

//do the remove
for (var i:int=0; i{
parent = target.getParentItem(items[i]);
index = getChildIndexInParent(parent, items[i], target);
target.mx_internal::removeChildItem(parent, items[i], index);
}
}
}
}

private function getChildIndexInParent(parent:Object, child:Object, target:Tree):int
{
var index:int = 0;
if (!parent)
{
var cursor:IViewCursor = ICollectionView(target.dataProvider).createCursor();
while (!cursor.afterLast)
{
if (child === cursor.current)
break;
index++;
cursor.moveNext();
}
}
else
{
if (parent != null && target.dataDescriptor.isBranch(parent) &&
target.dataDescriptor.hasChildren(parent))
{
var children:ICollectionView = target.dataDescriptor.getChildren(parent);
if (children.contains(child))
{
for (; index < children.length; index++)
{
if (child === children[index])
break;
}
}
}
}
return index;
}