Question about graphstream

[Belly Bell <bellybell20001 AT gmail.com>]

Hi. I am computer science  student ingenieer, and i work now on my projet to get the ingenieera, ana i al using graphstream library. My question is:

 When i try to zoom the graph, using view.getCamera().setPercent(), some nodes will be hidden, and the problem is when tow nodes connected by an edge are hidden after zooming the graph, its edge will be also hidden. I want to keep this edge as appeared even if its extremities are hidden. any help please. 

Thanks for advance.