Yes, that's my own custom UI framework. Most of the platform dependent stuff is implemented in the smooth library. In hindsight, it would have been easier to j

Yes, that's my own custom UI framework. Most of the platform dependent stuff is implemented in the smooth library. In hindsight, it would have been easier to just use Qt, GTK or wxWidgets. But I learned a lot by doing this myself and wouldn't want to miss that experience.