public override DragAndDropVisualMode DoDrag(TreeViewItem parentItem, TreeViewItem targetItem, bool perform, TreeViewDragging.DropPosition dropPosition) { DragAndDropVisualMode result; if (this.m_Owner.m_OverriddenMethods.hasHandleDragAndDrop) { TreeView.DragAndDropArgs args = new TreeView.DragAndDropArgs { insertAtIndex = -1, parentItem = parentItem, performDrop = perform }; if (parentItem != null && targetItem != null) { args.insertAtIndex = TreeViewDragging.GetInsertionIndex(parentItem, targetItem, dropPosition); } result = this.m_Owner.HandleDragAndDrop(args); } else { result = DragAndDropVisualMode.None; } return(result); }
protected virtual DragAndDropVisualMode HandleDragAndDrop(TreeView.DragAndDropArgs args) { return(DragAndDropVisualMode.None); }