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);
}