Graphical Modeling Framework Runtime - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 478

}
return element;

}

private Object unwrapEditPart(EditPart p) {
if (p.getModel() instanceof View) {
return unwrapView((View) p.getModel());

}
return p.getModel();

}

private Object unwrapView(View view) {
return view.getElement() == null ? view : view.getElement();

}

}

As you can see, we need to add an AdapterFactory for our plug-in, which
can be configured in our MindmapDiagramEditorPlugin class, as shown here:

private ComposedAdapterFactory adapterFactory;
@Override
public void start(BundleContext context) throws Exception {
super .start(context);
instance = this ;
adapterFactory = createAdapterFactory();

}

protected ComposedAdapterFactory createAdapterFactory() {
final List<AdapterFactoryImpl> factories = new
ArrayList<AdapterFactoryImpl>();
factories.add( new MindmapItemProviderAdapterFactory());
factories.add( new ResourceItemProviderAdapterFactory());
factories.add( new ReflectiveItemProviderAdapterFactory());
return new ComposedAdapterFactory(factories);

}

public AdapterFactory getItemProvidersAdapterFactory() {
return adapterFactory;

}

The propertySections contribution appears here, along with the imple-
mentation of our MindmapPropertySection class. Input types are declared to
be GEF EditPart types because they will be selected on our diagram. The
implementation of MindmapPropertySection is standard for most diagrams
and can be seen in generated code for the mindmap diagram.