Bil Kleb wrote:

> I'd like to create a simple GUI ap that contains some dynamic sketches
> consisting of things like triangles, circles, and rectangles.
> 
> What's my best route?
> 
> (GNU/Linux platform)

I haven't used the library myself yet, but you should be able to do this 
very well with the Ruby/Qt libraries.  It will use Qt to make your 
windows under Gnome/KDE (anything X11 I believe) and gives you a canvas 
to draw on.  Check this out:

         http://www.ruby-lang.org/en/raa-list.rhtml?name=Ruby%2FQt

	Sean