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EMFForms: selecting different viewmodels programatically [message #1816115]

Mon, 21 October 2019 13:09

Tamas Miklossy

Messages: 142
Registered: February 2016

Senior Member

Currently I use the method ECPSWTViewRenderer.INSTANCE.render(parent, eObject) to embed the EMFForm - based GUI into the application. This method invokation works well if there is only one viewmodel registered for a certain EObject.

Now I have several viewmodels registered to the same EObject to be able to render the GUI differently.

I saw that there are several overloaded versions of the ECPSWTViewRenderer.INSTANCE.render method, but I do not know how to parameterize that one correctly with the right viewmodel.

Thank you for your help in advance!
Tamás

[Updated on: Mon, 21 October 2019 13:11]

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Re: EMFForms: selecting different viewmodels programatically [message #1816204 is a reply to message #1816115]

Wed, 23 October 2019 15:07

Eugen Neufeld

Messages: 169
Registered: May 2015

Senior Member

HI Tamas,

in order to provide the view model using the ECPSWTViewRenderer.INSTANCE.render method you need this call:

final VView view = ViewProviderHelper.getView(domainObject, null);
			final ViewModelContext viewModelContext = ViewModelContextFactory.INSTANCE.createViewModelContext(view, domainObject);
			ECPSWTViewRenderer.INSTANCE.render(content, viewModelContext);

You can use this only if you have the rendering step under control.

If you want to select the view model dynamically, you can provide a custom View Provider as an OSGi Service:
just extend

org.eclipse.emf.ecp.view.spi.provider.IViewProvider

org.eclipse.emf.ecp.view.spi.provider.IFilteredViewProvider

Best,
Eugen

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Eugen Neufeld

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