[news.eclipse.tools.emf] Re: label providers

[Ed Merks <merks@xxxxxxxxxx>]

Anders,

The JFace viewers rely on objects in the tree being unique.  I.e., the 
object should appear at most once in the tree.  So EMF uses wrappers 
when dealing with things like non-containment references that are likely 
to violate these assumptions.  Such wrappers will know the parent to 
implement getParent correctly.  So in ItemProviderAdapter there are 
methods like isWrappingNeeded and createWrapper for creating them as 
needed.  It sounds like you could hook into this to create a wrapper 
that decorates the result in some specialized way depending on the parent...


Anders H wrote:
> Hi,
>
> I've got the following structure in my view:
>
> Component
>  - Service1
>     - Attribute1
>     - Service2
>  - Service2
>  - Entity1
>  - Entity2
>
> As you can see, the object Service1 appears in different places in the tree. 
>   
I only see it once.  I guess you mean Service2.  :-P
> How do I customize the label provider to take this into account. 
> Specifically, I want the label to state "implements Service2" when Service2 
> appears as a child of Service1.
>
> - Anders
>
>
>