public void MoveNode(MidgetTreeNode node, MidgetTreeNode newParentNode)
{
// retrieve old parent
MidgetTreeNode oldParentNode = (MidgetTreeNode)node.Parent;
// make sure not just copying to the parent or reorganizing within the parent
if (!newParentNode.Equals(node) && !newParentNode.Equals(node.Parent) && oldParentNode != null)
{
// if child is becoming the parent of it's parent
foreach (TreeNode childNode in node.Nodes)
{
if (childNode.Equals(newParentNode))
{
// clone old child and adjust it's parent
newParentNode = (MidgetTreeNode)childNode.Clone();
oldParentNode.Nodes.Add(newParentNode);
oldParentNode.ExpandAll();
// removce old child
childNode.Remove();
break;
}
}
// remove node from it's old location
oldParentNode.Nodes.Remove(node);
// add the node to it's new parent
newParentNode.Nodes.Add(node);
newParentNode.ExpandAll();
}
}
public void MoveNode(MidgetTreeNode node, MidgetTreeNode newParentNode)
{
// retrieve old parent
MidgetTreeNode oldParentNode = (MidgetTreeNode)node.Parent;
// make sure not just copying to the parent or reorganizing within the parent
if(!newParentNode.Equals(node) && !newParentNode.Equals(node.Parent) && oldParentNode != null)
{
// if child is becoming the parent of it's parent
foreach (TreeNode childNode in node.Nodes)
{
if(childNode.Equals(newParentNode))
{
// clone old child and adjust it's parent
newParentNode = (MidgetTreeNode)childNode.Clone();
oldParentNode.Nodes.Add(newParentNode);
oldParentNode.ExpandAll();
// removce old child
childNode.Remove();
break;
}
}
// remove node from it's old location
oldParentNode.Nodes.Remove(node);
// add the node to it's new parent
newParentNode.Nodes.Add(node);
newParentNode.ExpandAll();
}
}
protected override void OnDragDrop(DragEventArgs drgevent)
{
string [] text = drgevent.Data.GetFormats();
// if the object being dragged can become a treenode
if (drgevent.Data.GetDataPresent("MidgetUI.MidgetTreeNode", false))
{
Point pt = PointToClient(new Point(drgevent.X, drgevent.Y));
// retrieve the new parent node
MidgetTreeNode newParentNode = (MidgetTreeNode)GetNodeAt(pt);
// if you have missed the list drop it under the root node
if (newParentNode == null)
{
newParentNode = ((MidgetTreeNode)this.Nodes[0]);
}
// get newNode location
MidgetTreeNode node = (MidgetUI.MidgetTreeNode)drgevent.Data.GetData("MidgetUI.MidgetTreeNode");
// retrieve old parent
MidgetTreeNode oldParentNode = (MidgetTreeNode)node.Parent;
// make sure not just copying to the parent or reorganizing within the parent
if (!newParentNode.Equals(node) && !newParentNode.Equals(node.Parent) && oldParentNode != null)
{
// Issue update request
if (NodeMoveRequest != null)
{
NodeMoveRequest(this, new NodeMoveRequestEventArgs(node, newParentNode));
}
// no one is listening just do it
else
{
MoveNode(node, newParentNode);
}
}
}
}