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Deactivate ELK [message #1790896]

Tue, 19 June 2018 20:30

Amine Kechaou

Messages: 32
Registered: April 2016
Location: Karlsruhe, Germany

Member

Hi,

is there any way to deactivate ELK without having to uninstall it?

Best regards,
Amine

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Re: Deactivate ELK [message #1790902 is a reply to message #1790896]

Tue, 19 June 2018 23:17

Christoph Daniel Schulze

Messages: 98
Registered: September 2015

Member

Amine,

what do you mean by "deactivate", exactly?

Cheers,
Chris

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Re: Deactivate ELK [message #1790909 is a reply to message #1790902]

Wed, 20 June 2018 06:28

Amine Kechaou

Messages: 32
Registered: April 2016
Location: Karlsruhe, Germany

Member

Hi Christoph,

When creating a new diagram, ELK will do automatic layouting on my diagram. Sometimes I don't want this to happen, and want to disable ELK. Is there any way?

Best regards,
Amine

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Re: Deactivate ELK [message #1790920 is a reply to message #1790909]

Wed, 20 June 2018 09:06

Christoph Daniel Schulze

Messages: 98
Registered: September 2015

Member

Amine,

that basically depends on the way the developer of the editor you're using has integrated ELK into their editor. ELK itself won't do anything unless triggered explicitly by the user or by the editor. Which editor is it you're using?

Cheers,
Chris

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Re: Deactivate ELK [message #1790954 is a reply to message #1790920]

Wed, 20 June 2018 14:26

Amine Kechaou

Messages: 32
Registered: April 2016
Location: Karlsruhe, Germany

Member

Hi,

I'm trying to use it on my own Sirius editors. (https://github.com/kit-sdq/Modular-Reference-Structure-Editor)

I just had to install it and it automatically applies layouting to my diagrams. To prevent that I had to uninstall it, but that wouldn't be the best solution...

Best,
Amine

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Re: Deactivate ELK [message #1792792 is a reply to message #1790896]

Tue, 24 July 2018 07:41

Rakesh Nidavani

Messages: 25
Registered: March 2018

Junior Member

We are facing a similar situation. A proposed solution has also been added.

When using Sirius with our custom layouts, we encountered an issue due to the presence of ELK plugins.

ELK Defines a generic laout provider which is contributed using the extension : org.eclipse.gmf.runtime.diagram.ui.layoutProviders
Plugin : org.eclipse.elk.conn.gmf

Problem 1 : The ELK Layout provider has a very general "provides" method :
/**
* {@inheritDoc}
*/
public boolean provides(final IOperation operation) {
return operation instanceof ILayoutNodeOperation;
}

Due to this, the layout provider is applicable for almost all use cases.
This is not an issue on its own, since a generic layout provider is expected to work this way.

However,

Problem 2 : The ELK Layout Provider is also contributed with the highest possible priority.
In the extension specification, the provider is assigned with the priority "Highest".

Due to the above two points, it is impossible to have a custom layout contributed when ELK Layout is included in the list of plugins.

Proposal :
Change the priority of the ELK Layout contribution to a lower value.
This will ensure that other custom layouts can be integrated along with ELK Layouts.

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Re: Deactivate ELK [message #1792829 is a reply to message #1792792]

Tue, 24 July 2018 14:10

Christoph Daniel Schulze

Messages: 98
Registered: September 2015

Member

Ah, I understand. Rakesh has opened a GitHub issue for that and a pull request is just short of being merged.

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