Jscrollbar graph repainting

[Sebastian Bock <sebastian.bock AT bluewin.ch>]

Hi there,

I recently noticed another strange behavior of my graph in a Jscrollpane. If I scroll up and down in the scrollpane the graph doesn't "repaint" correctly. After a mouse click into the swing window the graph is repainted.

Is this a graphstream problem or am I doing something wrong with swing? 

Example code: http://pastebin.com/wQFCPfJc

Thanks in advance

Sebastian