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How to route Connections around nodes instead of across (GEF5) [message #1770362]

Thu, 10 August 2017 12:04

Thomas Oberle

Messages: 11
Registered: April 2017

Junior Member

Hello,

the standard OrthogonalRouter of GEF5 is routing across the Nodes in my GEF Project. (See attached picture)

So I want to implement my own IConnectionRouter to route around the Nodes.
Is there some kind of built-in function to route around nodes or to get me the position of all nodes to route around? Or do I have to gather the positions and dimensions of all nodes by myself?

Or is there any other way to solve my problem which I don´t see?

Thanks,
Thomas

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Re: How to route Connections around nodes instead of across (GEF5) [message #1770384 is a reply to message #1770362]

Thu, 10 August 2017 15:42

Matthias Wienand

Messages: 230
Registered: March 2015

Senior Member

Hi Thomas,

as you already know, the OrthogonalRouter does not avoid obstacles. It does only insert way points so that all segments between way points are either horizontal or vertical.

GEF 5.0.0 does not provide such functionality out-of-the-box, however, GEF Legacy Draw2D provides ShortestPathRouter, which does exactly that: http://help.eclipse.org/kepler/index.jsp?topic=%2Forg.eclipse.draw2d.doc.isv%2Freference%2Fapi%2Forg%2Feclipse%2Fdraw2d%2Fgraph%2FShortestPathRouter.html

As an alternative, you could let a layout algorithm compute the way points so that obstacles are avoided, e.g. using Graphviz or ELK (Eclipse Layout Kernel), which might be a good idea, anyway.

Best regards,
Matthias

[Updated on: Fri, 11 August 2017 14:11]

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