[news.eclipse.tools.gef] Re: [Zest] Follow-Up Question on Domain Objects

[Philip Mayer <eclipsetalk@xxxxxxxxxx>]

Dear all,

Wrote my own algorithm now.

Another question: Is there a "legal" way for finding out the underlying 
domain object of a LayoutRelationship from the layouting classes (or at 
all from outside the graph classes)?

Thanks,

Philip


Philip Mayer wrote:
> Hi,
>
> I am trying to use the ZEST DirectedGraphLayoutAlgorithm for a typical 
> Labelled Transition System with a few loops. I have a couple of nodes 
> and connections in-between, which are provided by an 
> IGraphContentProvider; labels are provided by a LabelProvider.
>
> The problem is that the nodes do not show up at all; all I see are 
> connections. Is the algorithm complete? (There are a lot of TODOs in the 
> code).
>
>  viewer= new GraphViewer(parent, SWT.NONE);
>  viewer.setContentProvider(new MyContentProvider());
>  viewer.setLabelProvider(new MyLabelProvider());
>  viewer.setLayoutAlgorithm(new DirectedGraphLayoutAlgorithm(SWT.VERTICAL));
>  viewer.setConnectionStyle(ZestStyles.CONNECTIONS_DIRECTED);
>
> On a related note, can I use the SpringLayout for such a layout, too? It 
> seems to randomly distribute the nodes; I'd like to have it loosely from 
> top to bottom. Can this be done?
>
> Thanks.
>
> Philip