I wouldn't call the GUI library "nicely modularized" at all. :) I regret rolling my own; the best choice when I started probably would have been https://github.

I wouldn't call the GUI library "nicely modularized" at all. :) I regret rolling my own; the best choice when I started probably would have been https://github.com/Gekkio/imgui-rs https://github.com/Gekkio/imgui-rs. Recently iced has appeared and looks like the most promising.