I don't have any experience (yet) with using Tk specifically on the LCD3
cape, but it is something I'm going to experiment with.
Is Tk an option for you?
http://www.tkdocs.com/
It's usable from scripting languages such as Tcl, Python, Perl, and Ruby.
You can also use it with straight C via the
Not exactly a GUI, but if it doesn't have to be super pretty and
fancy.. you can always make it a web page...fire up a browser when the gui
boots up and redirect it to local webhost.
just remember you will have to remap left/right buttons to tab in the lcd
overlay to make it useful.
On
