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Graphical Modeling Framework/Tips

I find those tips useful:

Creating New Elements And Corresponding Views

DeviceEditPart selectedElement = ...;

String compartemntsSemanticHint = NetworkVisualIDRegistry.getType(tests.mindmap.network.diagram.edit.parts.Device_ModulesCompartmentEditPart.VISUAL_ID);
Device_ModulesCompartmentEditPart modulesCompartment = (Device_ModulesCompartmentEditPart)selectedElement.getChildBySemanticHint(compartemntsSemanticHint);

IElementType type = NetworkElementTypes.Module_3001;

ViewAndElementDescriptor viewDescriptor = new ViewAndElementDescriptor(
		new CreateElementRequestAdapter(new CreateElementRequest(type)),
		Node.class,
		((IHintedType) type).getSemanticHint(), 
		selectedElement.getDiagramPreferencesHint());

CreateViewAndElementRequest req = new CreateViewAndElementRequest(viewDescriptor);
CompoundCommand cmd = new CompoundCommand("Create 10 modules");
for (int i=0; i<10; i++) {
	cmd.add(modulesCompartment.getCommand(req));
}
selectedElement.getDiagramEditDomain().getDiagramCommandStack().execute(cmd);

Change Names Of Newly Created Elements

Collection results = DiagramCommandStack.getReturnValues(cmd);
for (Object res: results) {
	if (res instanceof IAdaptable) {
		IAdaptable adapter = (IAdaptable) res;
		View view = (View) adapter.getAdapter(View.class);
		if (view != null) {
			Module newMod = (Module)view.getElement();
			SetRequest reqSet = new SetRequest(selectedElement.getEditingDomain(),
					newMod, NetworkPackage.eINSTANCE.getNamedElement_Name(),
					"ModX");
			SetValueCommand operation = new SetValueCommand(reqSet);
			selectedElement.getDiagramEditDomain().getDiagramCommandStack().execute(new 
					ICommandProxy(operation));
		}
	}
}

Create New Elements Using RecordingCommand and CanonicalEditPolicies


final Device dev = (Device)((View)selectedElement.getModel()).getElement();
TransactionalEditingDomain editingDomain = selectedElement.getEditingDomain();
editingDomain.getCommandStack().execute(new RecordingCommand(editingDomain) {
	@SuppressWarnings("unchecked")
	protected void doExecute() {
		dev.setName("Morda13");
		for (int i = 0; i < 5; i++) {
			Module newMod = NetworkFactory.eINSTANCE.createModule();
			newMod.setName("X26 - " + i);
			dev.getModules().add(newMod);
		}
	}
});

New-small.gif Remove Property Sheet altogether

Add next method to the generated diagram editor class (usually <ModelName>DiagramEditor)

	public Object getAdapter(Class type) {
		if (type == IPropertySheetPage.class) {
			return null;
		}
		return super.getAdapter(type);
	}

New-small.gif Sharing single EditingDomain instance across several diagrams

Generated code always creates new (own) instance of EditingDomain for each opened diagram editor. Since EditingDomain owns ResourceSet, different instances of domain model elements will be loaded for each opened diagram editor. Sometimes it is important to share the same domain model instances across several diagram editors (for example to get rid of synchronization problems). This leads us to the question of sharing same instance of EditingDomain across several generated diagram editors. Below you can find step by step description of necessary modifications you have to apply to the generated code.