Hello,

I am attempting to provide functionality to users of my application to drag a node out of my diagram view and drop it onto an Infragistics Ultragrid, so it can trigger an event that will open up another form using the node's tagged data object, and the ultragrid row's data object. The actual drag/drop functionality won't be a problem, as that has already been solved in these forums previously:

http://mindfusion.eu/Forum/YaBB.pl?num=1360593365/0#2

However, my issue is that I cannot drag a node outside of the diagram view. It just scrolls around the diagram.

I want that to still be the case, because it is important to be able to drag and drop nodes around that diagram. Whenever I hit a certain part of the diagram (beyond which, I know there is nothing else to the diagram), I want to turn off the scrolling, and be able to carry the node outside of the diagramview. Getting the bounds that I want to use to shut off the scrolling should be relatively simple. The only thing I need to know is how to turn off the scrolling when I hit those bounds.

Any thoughts on how to solve this?

Thank you!
-Seth

Excellent!  Thank you!

-Seth

You can cancel the OLE drag operation via the QueryContinueDrag event. Then the DoDragDrop method returns and the internal drag operation will continue as usual:

bool cancelInternalDrag;

private void diagram_NodeModifying(object sender, NodeValidationEventArgs e)
{
	var testRect = contentRect;
	testRect.Inflate(50, 50); // add buffer area when nodes can still be dragged internally
	if (!testRect.Contains(e.Node.Bounds))
	{
		cancelInternalDrag = true;
		DoDragDrop("test", DragDropEffects.Copy);

		if (cancelInternalDrag)
			e.CancelDrag(); // stop internal drag operation
	}
}

private void Form1_QueryContinueDrag(object sender, QueryContinueDragEventArgs e)
{
	var diagramPoint = diagramView.ClientToDoc(
		diagramView.PointToClient(MousePosition));
	var testRect = contentRect;
	testRect.Inflate(50, 50); // add buffer area when nodes can still be dragged internally
	if (testRect.Contains(diagramPoint))
	{
		e.Action = DragAction.Cancel;
		cancelInternalDrag = false;
	}
} 

I hope that helps,
Stoyan