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Generate diagram instance from ecore-instance [message #642947]

Fri, 03 December 2010 13:28

Kai Maschke

Messages: 16
Registered: October 2010

Junior Member

Hi,

how can I generate a diagram instance from an existing core-instance programatically ?
For example, I habe an instance called "test.model" and i want to generate programatically the "test.model_diagram" file.

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Re: Generate diagram instance from ecore-instance [message #642954 is a reply to message #642947]

Fri, 03 December 2010 13:56

Michael Golubev

Messages: 383
Registered: July 2009

Senior Member

Hello,

You would have to reimplement a lot of the logic which is spread over the diagram code in both generated plugin and runtime plugins.

However, I don't really understand why do you need the component like that. If you just setup the Diagram instance (linking it to the correct semantic element), then the very first opening of the diagram by the user will create all inner structure automatically. You can test it by removing all but the diagram element from existing *.model_diagram file and reopening the editor.

If that does not help and if you are brave enough, you may try to write code around:

- manually creating the Diagram instance by calling the XXXDiagramEditorUtil#createDiagram()
- iteratively calling the XXXDiagramUpdater#getSemanticChildren(View) to create the nodes structure first,
- calling the ViewService for each XXXNodeDescriptor collected from diagram updater to invoke creation of the compartments, labels and other staff implicitly added in the XXXViewProvider
- finally calling the code similar to <Diagram>CanonicalEditPolicy#collectAllLinks(..), and again, wrapping the XXXLinkDescriptors into Edge's by calling the ViewService.

But I would not try to do that myself without a really good reason.

Regards,
Michael

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Re: Generate diagram instance from ecore-instance [message #642980 is a reply to message #642954]

Fri, 03 December 2010 15:11

Kai Maschke

Messages: 16
Registered: October 2010

Junior Member

I didn't know that the diagram is initiated by itself. So, if I understood you correct, I just have to create an XML-file with the "..._diagram"-extension with content like this, right?

<?xml version="1.0" encoding="UTF-8"?>
<notation:Diagram xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:notation="http://www.eclipse.org/gmf/runtime/1.0.2/notation" xmlns:model="http://model/1.0" xmi:id="_lRUcsdbzEd-qeowyZ4pk7Q" type="Model" name="default.model_diagram" measurementUnit="Pixel">
<element xmi:type="model:Model" href="test.model#/"/>
</notation:Diagram>

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Re: Generate diagram instance from ecore-instance [message #642988 is a reply to message #642980]

Fri, 03 December 2010 15:19

Michael Golubev

Messages: 383
Registered: July 2009

Senior Member

Hello,

Yes, indeed, at least if your diagram us synchronized.

And the best way to create that initial contents is to call XXXDiagramEditorUtil#createDiagram and related methods called from the generated XXXCreationWizard#performFinish().

Regards,
Michael

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