Writing from scratch a new sdl widget would take a lot of time so I've looked for existing projects.
There are many sdl widget but most of them are in c++:
* [http://picogui.org/ picogui] in c++ * [http://www.newimage.com/~rhk/SDL_gui/ SDL_gui] in c++ && unmantained! :| * [http://libuta.sourceforge.net/ libuta] in c++ * [http://libksd.sourceforge.net/ libksd] it's a full featured cross platform game framework but it's in c++ * [http://www.paragui.org/ paragui] it's in c++