i would like to only enable drag/drop effects outside of the TreeView. That means, when i drag the TreeViewItem inside TreeView, the DragDropEffects should be None, when the mouse is out of the TreeView, drop effects will be allowed.
1). I have tried the RadTreeView_ItemPrepared and set the PreparedItem.AllowDrop = false. But i can also drag a TreeViewItem and drop it after last TreeViewItem.
2). I tried to set DropPosition property of TreeViewDragDropOptions. But it could only be set to Inside :(
Any idea? Thanks.