Mouse events in graphstream

[Stephen Ficklin <spficklin AT gmail.com>]

Hello,

I'm trying to use graphstream to visualize a large network.  I can 
successfully read in the network, display it and zoom in and out using 
the wheel on my mouse.  To zoom I use the 
java.awt.event.MouseWheelListener class.  I'd like to allow panning side 
to side or up and down by clicking and holding the mouse button and 
dragging, but I can't seem to make this work.  Is there a way in 
graphstream to capture mouse events in the view?  I see that I can do 
this using the ViewerListener, but the buttonPushed or buttonReleased 
only works when  I click a node in the graph.  I'd like panning to work 
regardless of where the user clicks in the view.

Thanks,
Stephen