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PracS
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While dragging a node how can i check if that node is hiting any other node in the diagram
May 8th, 2012 at 2:36pm
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I have following requirement that i wish to implement with Flowchart.net component.
1) Main diagram is displayed on canvas and any of the node is copied and pasted on the canvas.
2) The newly pasted node is not connected in the diagram.
3) Now user is dragging the newly pasted node and dropping it till any node in the diagram.
4) At this point the newly pasted node and the node in the diagram should get linked.
I am wondering how will I get to know which is the node in the diagram up to which the newly pasted node is dragged.
Is there any event in which I will get some information on nodes hit, nodes that coincide..
I appreciate any help on this.
Thanks.
  
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Stoyo
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Re: While dragging a node how can i check if that node is hiting any other node in the diagram
Reply #1 - May 8th, 2012 at 2:53pm
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You could check what nodes are there behind the moved one from the NodeModified handler:

Code
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private void diagram_NodeModified(object sender, NodeEventArgs e)
{
	DiagramNodeCollection nodesHere = diagram.GetNodesAt(e.MousePosition);
	if (e.AdjustmentHandle == AdjustmentHandles.Move && nodesHere.Count > 1)
	{
		DiagramNode topmost = nodesHere[0];
		if (topmost == e.Node)
			topmost = nodesHere[1];
		e.Node.Move(topmost.Bounds.Left, topmost.Bounds.Bottom + 5);
		diagram.Factory.CreateDiagramLink(topmost, e.Node);
	}
}


If you need to create both the node and the link from DragDrop event handlers, see the TreeLayout sample project.

I hope that helps,
Stoyan
  
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