[Jung-support] [Open Discussion] fitting vertext shape to label

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The following forum message was posted by tkanstren at http://sourceforge.net/projects/jung/forums/forum/252062/topic/4629999:

Hello all,

 I am trying to use JUNG to create an FSM representation. I am going with the
examples, javadocs and the tutorial, and tried to search this forum. I managed
to turn the vertex into an ellipse by doing something like this

    BasicVisualizationServer<State, String> vv = new BasicVisualizationServer<State,
String>(layout);
    vv.getRenderContext().setVertexShapeTransformer(new
EllipseVertexTransformer());

where EllipseVertexTransformer extends AbstractVertexShapeTransformer and does

  public Shape transform(State state) {
    return factory.getEllipse(state);
  }

to create the ellipse

then I use setAspectRatioTransformer to set aspect ratio to 0.5 and
setSizeTransformer  to set size to 100. I also use

    vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller());
    vv.getRenderContext().setEdgeLabelTransformer(new ToStringLabeller());
    vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);

to show the label on the vertex, centered. This gives me some default size but
does not take into account the size/width/number of lines in the label. I would
prefer something like "gimme and FSM with these states and transitions" but
if not then something like "gimme a vertex shaped like an ellipse with the label
inside it, automatic sizing plz". Is any of this possible?

Or perhaps some general hints of reference to an example on building a nice
and shiny FSM using JUNG?

 something like this: http://www.graphviz.org/content/fsm

 Seems like a basic question but could not find the answer. 

cheers & thanks,
Teemu