[SDL] Cursor disappears when moved

[Ilya Olevsky]

> Is there any trick I can use to programmatically hide the mouse cursor other
> than using SDL_ShowCursor(SDL_DISABLE)?

Try this: when you get the SDL_ACTIVEEVENT event, check if you're in 
fullscreen mode and gained focus, and if so call SDL_ShowCursor
(SDL_DISABLE). One way to check if the app gained focus is this:

if(SDL_GetAppState() & SDL_APPINPUTFOCUS)
...