[news.eclipse.modeling.gmf] Re: What is the right way to change the XXXD

["Theo" <NOSAPM@xxxxxxx>]

Thanks Vlad. The flow control snippet is pretty neat


"Vlad Ciubotariu" <vcciubot@xxxxxxxxxxxx> wrote in message 
news:pan.2007.01.16.16.23.22.57774@xxxxxxxxxxxxxxx
> On Tue, 16 Jan 2007 10:12:26 -0500, Theo wrote:
>
>> A straightforward brute force approach is to override its 
>> createFigure(...),
>> and that the way I would do it in GEF, but maybe GMF offers a more
>> elegant workaround.
>
> For ShapeNodeEditParts you should override createNodeFigure(). For
> AbstractBorderedShapeEditParts the method is createMainFigure().
>
>
>> And does changing the IFigure necessarily require changing the View
>> model element as well?
>
> The model-view-controller paradigm ensures the view is independent of the
> figure you use. However, if you have a compartment view it will probably
> be more useful to have a compartment editpart and so on a compartment
> figure.
>
> The information flow is as follows:
>
> (1) SemanticHint (viewID or ElementType) -> ViewProvider -> ViewFactory
> -> View
>
> (2) View -> EditPartFactory to return an EditPart
>
> Your viewProvider has to deal with two types of hints:
> (a) ElementTypes - this is the case when you use a tool or when a view is
> created by a canonical policy
>
> (b) view types, which are strings, when you create views from a view
> factory
>
> ElementTypes have semantic hint in plugin.xml (a string). So you can map
> from an ElementType to a string hint.
>
> I've found it's easier to have the following structure for the code:
> ViewProvider:
>
> protected Class getViewClass(IAdaptable semanticAdapter, String 
> semanticHint) {
> Class clazz = null;
> Map viewMap = Bluenose2GMFMapping.getViewMap();
>
> String viewType = semanticHint;
>
> if (viewType != null && viewType.equals("") == false) {
> clazz = (Class) viewMap.get(viewType);
> }
> // this case is possible when created by a canonical policy
> if (clazz == null) {
> viewType = Bluenose2VisualIDHelper.getSemanticHint(semanticAdapter);
> clazz = (Class) viewMap.get(viewType);
> }
>
> VisualIDHelper:
>
> public static String getSemanticHint(IAdaptable semanticAdapter) {
> EClass semanticType = getSemanticEClass(semanticAdapter);
> EObject semanticElement = getSemanticElement(semanticAdapter);
> if (semanticElement == null)
> return Bluenose2VisualIDs.UNKNOWN_VISUAL_ID;
>
> IHintedType elementType = (IHintedType) ElementTypeRegistry.getInstance()
> .getElementType(
> semanticType,
> ClientContextManager.getInstance().getClientContextFor(
> semanticElement));
>
> return elementType.getSemanticHint();
> }
>
> Mapping:
> static {
>
> Object[][] _map = {
> /* diagram */
> { DIAGRAM_VISUAL_ID, Bluenose2DiagramViewFactory.class,
> Bluenose2DiagramEditPart.class },
>
> /* blocks */
> { ARBITER_VISUAL_ID, BlockViewFactory.class,
> BlockEditPart.class },
>
> { MK_RA_VISUAL_ID, BlockViewFactory.class, BlockEditPart.class },
>
> { DATAPATH_VISUAL_ID, BlockViewFactory.class,
> BlockEditPart.class },
>
> { INTERFACE_NEXT_VISUAL_ID, BlockViewFactory.class,
> BlockEditPart.class },
>
> { INTERFACE_NEXT_REQ_ACC_VISUAL_ID, BlockViewFactory.class,
> BlockEditPart.class },
>
>
>
>