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[EMF Forms] Instance model changes in e4 [message #1753313]

Fri, 03 February 2017 17:42

Thorsten Arendt

Messages: 18
Registered: June 2013

Junior Member

Hi.
After having integrated an EMF Forms view in my e4 RCP application, I wonder how to set this part as DIRTY when editing and how to PROPAGATE the CHANGES made in the view/editor. Can anybody help? Code snippets or examples would be great.
Thanks, Thorsten

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Re: [EMF Forms] Instance model changes in e4 [message #1753419 is a reply to message #1753313]

Mon, 06 February 2017 09:13

Jonas Helming

Messages: 111
Registered: September 2016

Senior Member

Hi,

a simple way of controlling the dirty state would be to enable the dirty state tracking on the resource, which is opened in your editor. Ressource.setModificationTracking(true);
You can then attach an EDapater to the resource to be notified about a call to isModified.
If you already have another EContentAdapter attached to your model, I would rather integrate the dirty tracking there to avoid multiple adapters.

Best regards
Jonas

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Re: [EMF Forms] Instance model changes in e4 [message #1753440 is a reply to message #1753419]

Mon, 06 February 2017 13:52

Thorsten Arendt

Messages: 18
Registered: June 2013

Junior Member

Hi Jonas.

Thank you for your post. I added the following code to set the dirty flag:

resource.setTrackingModification(true);
EContentAdapter adapter = new EContentAdapter() {
	public void notifyChanged(Notification notification) {
                super.notifyChanged(notification);
                 System.out.println("The object has changed!");
                 dirty.setDirty(true);
        }
};
myEObj.eAdapters().add(adapter);
ECPSWTViewRenderer.INSTANCE.render(content, myEObj);
content.layout();

However, changes in the EMF Forms view/editor to myEObj are not notified! Did I miss something?

Regards, Thorsten

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Re: [EMF Forms] Instance model changes in e4 [message #1753509 is a reply to message #1753440]

Tue, 07 February 2017 10:55

Jonas Helming

Messages: 111
Registered: September 2016

Senior Member

Can you set a break point in the Setter in the model of the attribute that you wish to change? Could it be that databinding is set to "on focus out" and that you do not focus out?
About your code: you should use either the resource tracking OR a custom content Adapter. I assume you just added both for testing?

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Re: [EMF Forms] Instance model changes in e4 [message #1753522 is a reply to message #1753509]

Tue, 07 February 2017 12:41

Thorsten Arendt

Messages: 18
Registered: June 2013

Junior Member

Hi Jonas.

1. Setting the breakpoint verified that the getter is not called when editing the attribute (it is called only during loading the instance).
2. I do not exactly understand what you mean by the databinding advice. As far as I know provides EMF Forms the data binding implicitly when using 'ECPSWTViewRenderer.INSTANCE.render(content, myEObj)', so I did not implement a data binding explicitly.
3. Yes, adding both variants was for testing purposes.
4. The console says the following; maybe it's important:

!ENTRY org.eclipse.equinox.ds 1 0 2017-02-07 13:29:59.501
!MESSAGE Could not bind a reference of component org.eclipse.emfforms.swt.core.rendererfactory. The reference is: Reference[name = EMFFormsAdditionalRendererService, interface = org.eclipse.emfforms.spi.swt.core.EMFFormsAdditionalRendererService, policy = dynamic, cardinality = 0..n, target = null, bind = addEMFFormsAdditionalRendererService, unbind = removeEMFFormsAdditionalRendererService]

!ENTRY org.eclipse.equinox.ds 1 0 2017-02-07 13:29:59.524
!MESSAGE Could not bind a reference of component EMFFormsViewService. The reference is: Reference[name = Provider, interface = org.eclipse.emf.ecp.view.spi.provider.IViewProvider, policy = dynamic, cardinality = 0..n, target = null, bind = addProvider, unbind = removeProvider]

Thorsten

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Re: [EMF Forms] Instance model changes in e4 [message #1753626 is a reply to message #1753522]

Wed, 08 February 2017 09:39

Jonas Helming

Messages: 111
Registered: September 2016

Senior Member

Yes, EMF Forms will do the databinding for you. The default trigger is focus out. So in case of a text field, you need to focus out to trigger the change. Have you done that?
Besides that, could you provide a minimal example reproducing this? Data binding is a core feature and usually works out of the box.

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Jonas Helming
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Re: [EMF Forms] Instance model changes in e4 [message #1753666 is a reply to message #1753626]

Wed, 08 February 2017 16:19

Thorsten Arendt

Messages: 18
Registered: June 2013

Junior Member

Hi Jonas.

I finally solved the problem. There were some missing dependencies/plugins (...emfforms.core.services.databinding...).

Thank you for wasting your time!
Thorsten

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