Handle NodeModified. Check if e.Node.MasterGroup.MainNode.Bounds.Contains(e.Node.Bounds). If it doesn't, call e.Node.Detach. Call GetNodesAt(e.MousePosition), look for a group node in the returned list, and attach e.Node to it if one is found.

I hope that helps,
Stoyan

Hi Stoyan,

I also want to know about this.Let me clear first,what is the scenerio.

I have created a group of Nodes which is also a ShapeNode type Node and it has some childNode(ShapeNode) attached.
I have 2 groupNode of this kind.
Now I want to drag a child node from group1 and drop it into group2.

In NodeModified,I have not found e.Node.MasterGroup.MainNode.Bounds.Contains.

Any pointer in this regard?

Thanks,
Bala

Can you please send a code example so that I can correct my mistake.

Hi,

In my sample project I have

1. Some shape Nodes
2. Some Groups of ShapeNodes (This group node is also a ShapeNode that has some child shape node attached with it).
3. Have more than 3 groups of this kind.

Requirement:-

1. Want to detach a node from one group and drop that into another group.
2. If a node is not belongs to any group then also I want the same drag and drop functionality.

Problem:-

1. "e.Node.MasterGroup.MainItem.Bounds" main item doesn’t have Bounds property.
2. How can I identify the destination of the node, whether it is that group node or not.
3. I want to drop a node into a group only. If a user tries to drop node in diagram or any place other then group it should roll back.

Thanks in advance,
Bala

Thanks stoyan,it is helpful.

Now I am able to Drag and Drop Node from one group to another.
I have applied some conditions in DragDrop operation.If these conditions gets true than only node should drop into another group, else node should return back to its previous position.

Now I want know,How Node can move to its previous position if the condition gets false?

Thanks,
Bala

First of all, Thanks for the reply its working

Now I facing a different issue.Scenerio is like this.

I am selecting multiple nodes from one group and drop them into another group but in this operation I am getting 0 node count in that drop mouse position.Code is working fine for 1 node but I am unable to get mousePosition when select multiple nodes.

The code is like this.

if (sourceNode.MasterGroup.MainItem != null)
				{
				    DiagramNode sourceMasterNode = sourceNode.MasterGroup.MainItem as DiagramNode;
				    if (sourceMasterNode != null && !sourceMasterNode.Bounds.Contains(sourceNode.Bounds))
				    {
					  DiagramNodeCollection nodes = diagram.GetNodesAt(e.MousePosition);

					  if (nodes.Count == 1)
						sourceNode.Detach();
					  else
					  {......................}
					  }
					  } 

please suggest something.

Thanks,
Bala

No,I have done this in NodeModified event.