protected override void OnDragDrop(Forms.DragEventArgs drgevent)
{
if (selectedDropNode != null && nodeToBeDropped != null)
{
TreeNodeExParent oldParent, newParent;
if (nodeToBeDropped.Parent != null)
{
oldParent = new TreeNodeExParent(nodeToBeDropped.Parent);
nodeToBeDropped.Parent.Nodes.Remove(nodeToBeDropped);
}
else
{
oldParent = new TreeNodeExParent(nodeToBeDropped.TreeView);
nodeToBeDropped.TreeView.Nodes.Remove(nodeToBeDropped);
}
if (dragMoveDirection == DragMoveDirection.On)
{
selectedDropNode.Nodes.Add(nodeToBeDropped);
newParent = new TreeNodeExParent(selectedDropNode);
}
else
{
int pos = (dragMoveDirection == DragMoveDirection.Above) ? selectedDropNode.Index : selectedDropNode.Index + 1;
if (selectedDropNode.Parent == null)
{
Nodes.Insert(pos, nodeToBeDropped);
newParent = new TreeNodeExParent(this);
}
else
{
selectedDropNode.Parent.Nodes.Insert(pos, nodeToBeDropped);
newParent = new TreeNodeExParent(selectedDropNode.Parent);
}
}
selectedDropNode.Invalidate();
nodeToBeDropped.Invalidate();
// tell the dropped node
nodeToBeDropped.OnNodeMoved(new TreeNodeExMovedEventArgs(selectedDropNode, oldParent, newParent));
// tell the receiver
selectedDropNode.OnNodeDropped(new TreeNodeExMovedEventArgs(selectedDropNode, oldParent, newParent));
selectedDropNode = nodeToBeDropped = null;
}
if (mouseExpandTimer != null)
{
mouseExpandTimer.Dispose();
mouseExpandTimer = null;
}
Invalidate();
base.OnDragDrop(drgevent);
}
public TreeNodeExMovedEventArgs(TreeNodeEx node, TreeNodeExParent oldParent, TreeNodeExParent newParent)
{
Node = node;
OldParent = oldParent;
NewParent = newParent;
}