[Moose-dev] How tu visualize a graph using Roassal?

Hi everyone, I'm working on a project in order to analyze automatically project source code. The project consists in analyzing automatically Smalltalk project source code and in visualizing all the dependencies among the packages. Currently i have only a UI (using Spec Framework) to visualize the results in a TreeModel. I would like to have a visualization, like the screenshot attached (done with Graphviz), using Roassal. As you can see, we have the packages (the nodes) and the edges are linking the packages when they have dependencies among them. I would like to have a graph-visualization in order to detect potential cyclic dependencies. How can i do that with Roassal? Thanks for your help. Baptiste