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Layout Part of Diagram (NO_LAYOUT) [message #1850455]

Thu, 03 March 2022 14:48

Jonathan Li

Messages: 10
Registered: November 2021

Junior Member

I'm using a slightly modified version of ELK Layered. I'd like to keep certain nodes from being used in the layout processes or if possible send them to a separate layout algorithm. Right now I'm attempting to use the layout option NO_LAYOUT by node.setProperty(LayeredOptions.NO_LAYOUT, true). However, the algorithm doesn't respect it and adds them to the layout processes.

In the o.design file, I've tried adding the No Layout option. Selecting true leads to all nodes being excluded from layout while unchecking it seems to do nothing.

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Re: Layout Part of Diagram (NO_LAYOUT) [message #1850456 is a reply to message #1850455]

Thu, 03 March 2022 14:57

Sören Domrös

Messages: 14
Registered: June 2021

Junior Member

I am not sure what the problem might be. I think the NO_LAYOUT option works as intended, as seen here.
Do you maybe set this option on a node that is connected to other nodes.
This should result in an UnsupportedConfigurationExceptionsince it would leave an unconnected edge.
Can you share your model from here?

What o.desgin file?

Maybe this is just enabled or disabled top-level. So either all nodes are included or all excluded.

[Updated on: Thu, 03 March 2022 15:03]

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Re: Layout Part of Diagram (NO_LAYOUT) [message #1850458 is a reply to message #1850455]

Thu, 03 March 2022 15:04

Jonathan Li

Messages: 10
Registered: November 2021

Junior Member

Never mind, I got the NO_LAYOUT option to work. However, since the node is connected to the rest of the diagram the algorithm errors as it doesn't have access to that node. Is NO_LAYOUT the right way to go about doing partial layouts? I'd like to use a very simple custom layout algorithm for the part of the diagram I excluded.

I got org.eclipse.elk.core.UnsupportedGraphException: The source or the target of edge ElkEdge "O 1..1 " ElkNode "<<Process>>
Atomic_Process2" (20.0,201.0 | 170.0,62.0) -> ElkNode "Element2" (384.0,336.0 | 170.0,50.0) could not be found. This usually happens when an edge connects a node laid out by ELK Layered to a node in another level of hierarchy laid out by either another instance of ELK Layered or another layout algorithm alltogether. The former can be solved by setting the hierarchyHandling option to INCLUDE_CHILDREN.

[Updated on: Thu, 03 March 2022 15:08]

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Re: Layout Part of Diagram (NO_LAYOUT) [message #1850509 is a reply to message #1850458]

Mon, 07 March 2022 08:14

Sören Domrös

Messages: 14
Registered: June 2021

Junior Member

That depends on what you want to do with the graph. You could of course just create two different graphs that you layout separately. Or you could do an initial layout, for example a force layout, and then programmatically set the NO_LAYOUT option to layout the other part with the layered algorithm.
Quote:

I got org.eclipse.elk.core.UnsupportedGraphException: The source or the target of edge ElkEdge "O 1..1 " ElkNode "<<Process>>
Atomic_Process2" (20.0,201.0 | 170.0,62.0) -> ElkNode "Element2" (384.0,336.0 | 170.0,50.0) could not be found. This usually happens when an edge connects a node laid out by ELK Layered to a node in another level of hierarchy laid out by either another instance of ELK Layered or another layout algorithm altogether. The former can be solved by setting the hierarchyHandling option to INCLUDE_CHILDREN.

The UnsupportedGraphException is usually thrown if the configuration is indeed not supported. If you provide an example I can have a look at it.

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