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

[Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>]

One more not TreeViewer supports having the same instance in a Tree 
under the different paths. A Tree like this completely correct in terms 
of TreeViewer because the paths to the element is different.

---------8<---------
- Soccer
  - Tom Schindl
  - Ed Merks
- Rugby
  - Ed Merks
- Tennis
  - Tom Schindl
---------8<---------

Tom

Tom Schindl schrieb:
> Well I'd use a ITreePathLabelProvider (or TreeColumnViewerLabelProvider 
> if you are on 3.3) instead of giving you the element it will give you 
> the TreePath :-)
>
> Tom
>
> Ed Merks schrieb:
> > 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
> > >
> > >
> > >   


--
B e s t S o l u t i o n . at
--------------------------------------------------------------------
Tom Schindl                                          JFace-Committer
--------------------------------------------------------------------