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DDiagramElement of a programatically created model object [message #1806777]

Wed, 15 May 2019 02:49

Eclipse User

I am creating objects of my model classes in a java service. And I have graphical representations set for them in the visual specification project. I'm able to see the diagram representation of the newly created objects. I wish to set the position and size of these newly created object in my java service and by referring to [1] I understand that I need to have the DDiagramElement referring to this object so that I can set the LayoutData. How can I retrieve the DDiagramElement for a model object that is created in the java service.

For example:
In the case of Family model, if I create a Man object and named it "Alex" in a java service, how can I get the DDiagramElement referring to this? Or is there another way doing what I am trying to do?

I will greatly appreciate your thoughts in this direction.

Thanks in Advance
Jai

[1] https://wiki.eclipse.org/Sirius/Cookbook#Set_Coordinates

Re: DDiagramElement of a programatically created model object [message #1806792 is a reply to message #1806777]

Wed, 15 May 2019 04:36

Eclipse User

Hello,

When a service creates semantic elements a command is executed. This will trigger a synchronization on the diagram that will create the required DDiagramElements concerning the change introduced by the command. Therefore, in your service you only need to refresh the representation for the the new DDiagramElements to be created: DialectManager.INSTANCE.refresh(diagram, new NullProgressMonitor());
The DDiagramElement is now created but there is no reference of a semantic element to DDiagramElements representing it, it's DDiagramElements that references their semantic element. You will need to use the API new EObjectQuery(semanticElement).getInverseReferences(ViewpointPackage.Literals.DSEMANTIC_DECORATOR__TARGET);

Regards,
Steve

Re: DDiagramElement of a programatically created model object [message #1806816 is a reply to message #1806792]

Wed, 15 May 2019 11:15

Eclipse User

Hello Steve,

Thank you for quick reply :)

I managed to something like this (Not complete and elegant yet. But it confirms things work)

	Session createdSession = SessionManager.INSTANCE.getSession(ab);
	Collection<EObject> objects;
	Collection<DRepresentation> allRepresentations = DialectManager.INSTANCE.getAllRepresentations(createdSession);
	for(DRepresentation representation: allRepresentations) {
		DialectManager.INSTANCE.refresh(representation, new NullProgressMonitor());
	}
	objects = new EObjectQuery(ab).getInverseReferences(ViewpointPackage.Literals.DSEMANTIC_DECORATOR__TARGET);

	for(EObject eo: objects){
		DDiagramElement de = (DDiagramElement) eo;
		String n = de.getName();
		LayoutData layoutData = SiriusLayoutDataManager.INSTANCE.getData((AbstractDNode)de, true);
		layoutData.getLocation().setLocation(0, 0);
	}

I can see that the new element is getting positioned at x=0 and y=0. But immediately it moves to somewhere else on the screen. Not sure if i'm doing something wrong here. Again, I would greatly appreciate your inputs. Thank you in advance :)

Jai

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