public void MoveFromNode(DesignerNode source, DropLinePosition position)
{
switch (position)
{
case DropLinePosition.OnNode:
int newIndex = Node.Children.Count;
if (Node.Children.Contains(source.Node))
{
newIndex--;
}
InternalMoveNode(source.Node, Node, newIndex);
// Remove and recreate the designer node -- the tree draws the lines improperly if we just move the node, and ASource.Reposition raises a null reference exception
source.Remove();
DesignerNode newNode = source.Copy();
AddBaseNode(newNode);
TreeView.SelectedNode = newNode;
if (Parent != null)
{
Parent.ExpandAll();
}
break;
case DropLinePosition.AboveNode:
MoveIntoSibling(source, Node.Parent.Children.IndexOf(Node));
break;
case DropLinePosition.BelowNode:
MoveIntoSibling(source, Node.Parent.Children.IndexOf(Node) + 1);
break;
}
DesignerTree.Modified();
}
private void MoveIntoSibling(DesignerNode source, int index)
{
int siblingIndex = Parent.Nodes.IndexOf(source);
if ((siblingIndex >= 0) && (siblingIndex < index))
{
index--;
}
InternalMoveNode(source.Node, Node.Parent, index);
// Remove and recreate the node -- the tree draws the lines improperly if we just move the node, and ASource.Reposition raises a null reference exception
source.Remove();
DesignerNode newNode = source.Copy();
Parent.InsertBaseNode(index, newNode);
TreeView.SelectedNode = newNode;
Parent.ExpandAll();
}