SDL2 version of the example (or even better, backend-independent)

Nobody has claimed this yet.

The best screenshots at the Readme come from the demo in the "example" folder. However, that demo is not just a "demo", because it includes a complete GLFW backend, thus making that example GLFW-dependent and GLEW-dependent, which is unfortunate. I believe that example could be rewritten in a backend-independent way, just like the small demos in the source tree.

The unfortunate thing is not only making it dependent on a specific backend, but, by implementing the backend together with the example, the code is unnecessarily complex. The small demos separate the backend and the demo code, making it very easy to understand (and not because they are smaller, but because you don't mix what belongs to the backend, and what belongs to the demo).

I prefer Nuklear over ImGui because I use C, but in ImGui you can see the complete demo in all backends. In Nuklear it should be possible too. Those of us who don't use GLFW, miss the fun of the best example...

Start by reviewing the demo in the example folder and comparing it with the small demos in the source tree, especially how backend code is separated from demo code. Determine the scope of an SDL2 or backend-independent example and consider how the README screenshots would use it; done means the example no longer depends on GLFW or GLEW and remains understandable across backends.

Written by the indexing model from the issue text.