[news.eclipse.modeling.gmf] Re: 'Selecting' nodes through IAction

[Cayla Sha <cayla_sha@xxxxxxx>]

Hello Gaff,

ok, if I understand you right, you have set up everything, and your only 
problem is to iterate over all nodes to find the nodes with the right 
property-values.

I still don`t understand why you want to select the nodes. But no matter 
what you want to do with a certain amount of nodes (selecting them, 
changing their color, changing their properties...), you first have to 
iterate over all nodes and find the ones you want to work with.

Why don`t you take my suggested method:
DiagramGraphicalViewer dgv = 
(DiagramGraphicalViewer)XXXDiagramEditor.getInstance().getDiagramGraphicalViewer();
Map editPartRegistry = dgv.getEditPartRegistry();
(you can do this also from within you IAction)

In this Map are all EditParts of the Surface, inclusive the 
DiagramSurface itself.(debug it to see whats inside) When you iterate 
over all EditParts you can ask if the elements are an instance of the 
Nodes you`re searching for.
Then you get the sematic Element and ask, if it has the property-value 
what you`re searching for. And if yes, you can do whatever you want with 
the node :)

I do something simliar in my code. Here IÂm searching for Locations:

DiagramGraphicalViewer dgv = 
(DiagramGraphicalViewer)CmseditorDiagramEditor.getInstance().getDiagramGraphicalViewer();
Map<?, ?> editPartRegistry = dgv.getEditPartRegistry();
if(!editPartRegistry.isEmpty())
{
	Iterator<?> registryValues = editPartRegistry.values().iterator();
	while(registryValues.hasNext())
	{
		Object o = registryValues.next();
		
		if(o instanceof LocationEditPart)
		{
			LocationEditPart locationEditPart = (LocationEditPart) o;
			Location location = (Location) locationEditPart.resolveSemanticElement();
		}
	}
}

Like I told you before, you need to add 
....diagram.part.XXXDiagramEditor.getInstance() manually. 
XXXDiagramEditor is innately a Singelton, you just need to add the 
method, so that you can grab its instance.

Best wishes
Julia