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Benoit Caron
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Diagram.AllowLinksRepeat
Apr 8th, 2009 at 8:52pm
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Hello everyone,

I have set the Diagram.AllowLinksRepeat property to "false" to prevent... links repetition!

I seems to only prevent repetition for a link in the same direction.

Looking at the online documentation, the general description is:

"Gets or sets a value indicating whether more than one link can connect the same origin and destination diagram nodes."

but the remarks is:

"Specifies whether more than one link can connect the same origin and destination diagram nodes. If set to false, two diagram nodes can be connected with at most one link in a single direction."

So I guess I have my answer...

Can someone confirm that the property only prevent links in the same direction as the existing one?

Is there any other property I can use to prevent link repetition regardless of the existing link direction?

thanks,
Benoît Caron
  
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Stoyo
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Re: Diagram.AllowLinksRepeat
Reply #1 - Apr 9th, 2009 at 7:58am
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Hi,

There isn't such property. You can still do this with some event handling. E.g. handle LinkCreating or LinkModifying, call PathFinder.FindPath(destination, origin), and set e.Cancel = true if the path found contains one link. You might skip the check for how many links are there in the path if you want to prevent cycles of arbitrary length in the graph.

I hope that helps,
Stoyan
  
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Benoit Caron
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Re: Diagram.AllowLinksRepeat
Reply #2 - Apr 9th, 2009 at 1:53pm
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Hello,

I ended up using LinkCreated and did my own check (but I needed to delete the created link).  Your way sounds better Smiley

Thansk again for all the informations.

Benoît
  
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