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How to avoid overlap of ports with org.eclipse.elk.layered algorithm? [message #1803958]

Thu, 14 March 2019 09:47

Laurent Redor

Messages: 300
Registered: July 2009

Senior Member

Hi,

I have several ports on a node and I want that they are distributed on all borders and not only on one side. I don't find the right configuration. Can you help me?
I use the last version of ELK (master branch).

Steps to reproduce:
* The original graph is like in "Initial graph.png"
* Open "PortsSample.elkg" in the "Layout Graph" view
* The result of the layout is like in "Graph after layout.png": all the ports have WEST as fixed side and are distributed on this side, with overlap. Even if there is org.eclipse.elk.spacing.portPort set to 20.

The problem is the same if there are edges (for example with "Diagram with ports and edges.elkg").

I tried several configuration but without success.

Regards,

Laurent

Attachment: Initial graph.png
(Size: 4.87KB, Downloaded 199 times)
Attachment: Graph after layout.png
(Size: 4.40KB, Downloaded 171 times)
Attachment: PortsSample.elkg
(Size: 1.74KB, Downloaded 206 times)
Attachment: Diagram with ports and edges.elkg
(Size: 8.99KB, Downloaded 194 times)

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Re: How to avoid overlap of ports with org.eclipse.elk.layered algorithm? [message #1804477 is a reply to message #1803958]

Tue, 26 March 2019 14:56

Miro Spönemann

Messages: 78
Registered: March 2015
Location: Kiel, Germany

Member

The ports are distributed depending on the connected edges. If there are no connected edges, they all get on the west side. In the example with edges, all edges except one go from node A to node B. If you would like the feedback edge (B to A) to be routed differently, try setting the option org.eclipse.elk.layered.feedbackEdges to true. This would also change the side of the respective ports.

The only alternative to this automatic distribution is to force each port onto a specific side. You can do that by setting org.eclipse.elk.core.options.PortConstraints to FIXED_SIDE and then assigning org.eclipse.elk.port.side to each port.

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Re: How to avoid overlap of ports with org.eclipse.elk.layered algorithm? [message #1804542 is a reply to message #1804477]

Thu, 28 March 2019 14:12

Laurent Redor

Messages: 300
Registered: July 2009

Senior Member

OK I understand. Thank for you response.
I think that it will be a great improvement to use other sides if there is not enough space on west side (and by the way considering the property org.eclipse.elk.spacing.portPort). The main goal would be to avoid overlap.

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Re: How to avoid overlap of ports with org.eclipse.elk.layered algorithm? [message #1804543 is a reply to message #1804542]

Thu, 28 March 2019 14:34

Miro Spönemann

Messages: 78
Registered: March 2015
Location: Kiel, Germany

Member

Please create an issue for that: https://github.com/eclipse/elk/issues

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Re: How to avoid overlap of ports with org.eclipse.elk.layered algorithm? [message #1804776 is a reply to message #1804543]

Mon, 01 April 2019 06:14

Laurent Redor

Messages: 300
Registered: July 2009

Senior Member

Hello,

I have created a bugzilla for this problem https://bugs.eclipse.org/bugs/show_bug.cgi?id=545990
Do I have to create a cloned issue on GitHub?

Regards,

Laurent

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