hide-cursor.c

#include <SDL.h>

int PollEvents()
{
  SDL_Event event;
  while (SDL_PollEvent(&event))
  {
    switch (event.type)
    {
      case SDL_QUIT:
        return 1;

      case SDL_WINDOWEVENT:
        if (event.window.event == SDL_WINDOWEVENT_ENTER)
          printf("Mouse focus gained\n");
        else if (event.window.event == SDL_WINDOWEVENT_LEAVE)
          printf("Mouse focus lost\n");
        break;
      case SDL_MOUSEMOTION:
        printf("relative mm: %d, %d\n", event.motion.xrel, event.motion.yrel);
        break;
      default:
        break;
    }
  }

  return 0;
}

int main(int argc, char *argv[])
{
  SDL_Init(SDL_INIT_VIDEO);

  SDL_Window *win = SDL_CreateWindow("Test",
    SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
    800, 600, 0
  );

  SDL_ShowCursor(SDL_FALSE);

  while (1)
  {
    if (PollEvents())
      break;
  }

  SDL_DestroyWindow(win);

  SDL_Quit();

  return 0;
}