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set decorators without validation [message #987195]

Sat, 24 November 2012 06:27

Rami D.
Messages: 14
Registered: August 2012

Junior Member

Hi,

I wonder if it is possible to place a validation decorator onto a node without validating the diagram. A transformation is performed when saving and in case an exception is raised, i want to attach decorators (and probably markers for the problems view) to one or more specific elements on the canvas. How can this be realized, if at all?

Regards,
Rami

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Re: set decorators without validation [message #987205 is a reply to message #987195]

Sat, 24 November 2012 08:02

Andreas Muelder
Messages: 105
Registered: July 2011

Senior Member

Hello Rami,

you can create IMarkers for exceptions in your transformation and add them to the underlying IResource. GMFs validation decoration provider will display them if they are of type org.eclipse.gmf.runtime.common.ui.services.marker.

To map the marker to a graphical element, you should set the custom marker attribute
org.eclipse.gmf.runtime.common.ui.resources.IMarker.ELEMENT_ID to the URI fragment
of the notation model element to display.

Regards,

Andreas

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Re: set decorators without validation [message #987223 is a reply to message #987205]

Sat, 24 November 2012 12:36

Rami D.
Messages: 14
Registered: August 2012

Junior Member

Hi Andreas,

wow, this sounds really straightforward. Smile

I'll try this out.
Many thanks for your help.

Regards,
Rami

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Re: set decorators without validation [message #987238 is a reply to message #987223]

Sat, 24 November 2012 17:07

Rami D.
Messages: 14
Registered: August 2012

Junior Member

Hi Andreas,

i've followed your approach and it works great. Thanks again!

For those who are interested, here is the code:

IEditorPart editor = ... ;
Diagram diagram = editor.getDiagram();
Resource diagramResource = diagram.eResource();
URI uri = diagramResource.getURI();

if(uri.isPlatformResource())
{
 String platformURI = uri.toPlatformString(true);
 IResource res = ResourcesPlugin.getWorkspace().getRoot().findMember(platformURI);

 String uriFragment = ViewUtil.getIdStr((View) editpart.getModel());

 IMarker m = res.createMarker(XXXDiagramEditorPlugin.ID + ".diagnostic");
 m.setAttribute(IMarker.MESSAGE, "transformation error occurred: " +  
   eobj.getClass().getSimpleName() + " could not be transformed.");
 m.setAttribute(IMarker.PRIORITY, IMarker.PRIORITY_HIGH);
 m.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 m.setAttribute(org.eclipse.gmf.runtime.common.ui.resources.IMarker.ELEMENT_ID,
   uriFragment);
}

note: the created marker must be of type XXXDiagramEditorPlugin.ID + ".diagnostic" to be handled by the validation decorator provider.

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Re: set decorators without validation [message #987361 is a reply to message #987238]

Mon, 26 November 2012 04:56

Ralph Gerbig
Messages: 550
Registered: November 2009

Senior Member

Hi,

maybe you could add it to the wiki:
http://wiki.eclipse.org/Graphical_Modeling_Framework/Tips

Ralph

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