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What happens after DiagramDialectUIServices.openEditor? [message #1834440]

Tue, 10 November 2020 12:18

Yufei Zhou

Messages: 44
Registered: March 2020

Member

Hi,

I am trying to create a element's representation programmatically by using the api org.eclipse.sirius.business.api.dialect.DialectManager.createRepresentation and DiagramDialectUIServices.openEditor. The api works fine and it indeed creates a diagram representation and opens it, but there's one thing strange. After I executed these methods and calls a session.save to save the current session, the opened diagram was momently saved, but after half or one second the diagram editor becomes dirty again, and a star sign(which indicates the diagram is not properly saved) appears on the editor page label.

I really wonder what happed after I called DiagramDialectUIServices.openEditor, why the editor was saved but turn dirty again? Who modified the diagram? Is there any way to make the diagram representation properly saved just after it was created and opened? It's kind of important to my application. Any hint or advice will helps.

Thanks for your help very much.
Yufei Zhou

[Updated on: Tue, 10 November 2020 12:31]

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Re: What happens after DiagramDialectUIServices.openEditor? [message #1834485 is a reply to message #1834440]

Wed, 11 November 2020 09:58

Yufei Zhou

Messages: 44
Registered: March 2020

Member

I found the method that sirius would trigger after editor open: its org.eclipse.sirius.diagram.ui.internal.refresh.layout.SiriusCanonicalLayoutCommand.executeLayoutDueToExternalChanges.

Now the problem is how to sync the model before this method triggers and save the external changes manually. I believe that just as the method's name indicating, if there is no external changes detected, then the method will not be executed. I guess there will be an api for saving the external changes after a new diagram representation is newly-created. Could someone give me a hint?

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Re: What happens after DiagramDialectUIServices.openEditor? [message #1834549 is a reply to message #1834485]

Thu, 12 November 2020 09:34

Florian Barbin

Messages: 262
Registered: August 2010

Senior Member

Hi,

Indeed, the first time a diagram is opened, an arrange all is automatically launched. To detect the first opening, an adapter is added (NotYetOpenedDiagramAdapter) by calling org.eclipse.sirius.diagram.business.internal.dialect.NotYetOpenedDiagramAdapter.markAsToArrange(DDiagram).
Before calling your opening action, you can remove this adapter:
if (targetDiagram.eAdapters().contains(NotYetOpenedDiagramAdapter.INSTANCE)) {
targetDiagram.eAdapters().remove(NotYetOpenedDiagramAdapter.INSTANCE);
}

Regards,

Florian

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