Learning prefuse, a hard start, but progress made

As many commented, it is a hard start to learn prefuse toolkit. But once dig into the source codes and demos, a good progress has been made.

Have to say Jeff is definitely a genius. Just learn the codes may cause me one year or more, but he finish writing such codes as his master thesis work.

After trial-and-fail for three weeks, now the structure is clear. Will keep posting to help others.