I am preparing to give a talk on pthread programming at the next BLU meeting. I have a log of good code examples and Dave Butenhof's book, Programming with POSIX Threads is an excellent resource. What I am looking for is a relatively simple demo program that uses graphics.
I'm using some demos to show queing, deadlock, mutexes, attribues, Dining Philosophers, and a few other things, but it would be nice to have a simple graphic display using GTK or QT. I'd prefer C or C++ because Java has a different model.