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Normal Topic Diagram Link Lengths (Read 2654 times)
BidMaestro
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Diagram Link Lengths
May 9th, 2009 at 10:20am
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Is it possible to lengthen diagram links after a Layout Arrange has been performed? I noticed the link length field is readonly and cannot be altered.
The purpose of this request is to push apart or contract the nodes in the diagram area without changing nodedistance values and performing another arrange. This is a situation where a user manual re-arranges nodes and wishes to automatically expand the distance bewteen the nodes

regards
Doug
  
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Stoyo
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Re: Diagram Link Lengths
Reply #1 - May 9th, 2009 at 11:54am
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Multiplying the node positions by the same factor should move them apart uniformly, and the result should be that the links are lengthened by the same factor.

Code
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float factor = 1.5f;
foreach (DiagramNode node in diagram.Nodes)
{
	 RectangleF r = node.Bounds;
	 PointF p = new PointF(r.X, r.Y);
	 p.X *= factor;
	 p.Y *= factor;
	 node.Move(p.X, p.Y);
}


If using links with more than one segments, you could multiply their intermediate control points by the same factor, or enable the RetainForm property, so that they also preserve their shape.

I hope that helps,
Stoyan
  
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BidMaestro
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Re: Diagram Link Lengths
Reply #2 - May 9th, 2009 at 12:01pm
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Stoyo

You guys continually amaze me on how how quick you respond..... and with great resolutions...I will try this one shortly.

Doug
  
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BidMaestro
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Re: Diagram Link Lengths
Reply #3 - May 9th, 2009 at 1:10pm
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Stoyo

Your code after I converted it to VB.Net worked a treat...except where I have an attachednode containing text which is moved further away from its attached base node.

I wrote two pieces of code the first with an expansion factor of 1.1 to expand the diagram by 10% and the second with a contraction factor of 0.9 to contract the diagram by 10%

Doug
  
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BidMaestro
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Re: Diagram Link Lengths
Reply #4 - May 9th, 2009 at 1:52pm
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Stoyo

I was able to address the problem of the attachednodes being moved by excluding them as I looped through the nodes and only applying the expansion or contraction factor to nodes that were not attached...fortunately I had the means in place to readily identify the attachednodes.

Doug
  
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Stoyo
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Re: Diagram Link Lengths
Reply #5 - May 10th, 2009 at 8:41am
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Hi Doug,

You can always find out if a node is attached by checking its MasterGroup property.

I hope that helps,
Stoyan
  
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