[news.eclipse.modeling.gmf] A visual hierarchal layout for nodes

[Ben Amor <mbenamor@xxxxxxxxxxxxxxxxxxx>]

Hi,

I am new to Eclipse GMF and started using to it to develop a graphical 
editor for a hierarchal model we developed.

We succeeded in generating the nodes along with the basic links but we 
are stuck at the layout definition. Before proceeding to radical 
solutions I wanted to make sure if there is a simple way to integrate a 
hierarchal layout for our nodes. To make things clearer, we want the 
end-user to manipulate a graphical tree of nodes:

                                   A
                -------------------^-------------------------------
                |                                                 | 

                |                                                 | 

                E                                                 B 

         -------^--------
         |              |
         |              |
         C              D

In our current implementation users can place nodes wherever they want 
(of course using the absolute XY layout) but we want to show clearly the 
hierarchal structure of the model. For instance if users will add a 
child node to C, it should be placed under C. Is there a way to impose 
such layout on nodes in order to preserve the hierarchal visual view or 
should we develop our own layout? One final question, how to force two 
rectilinear links to meet at the same end-point; for example the link 
from D to E and C to E must meet at the same point in E.

I appreciate your help and advices in advance.
--
Ben Amor