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RedHat 9 (Linux i386) - man page for sdl_seteventfilter (redhat section 3)

SDL_SetEventFilter(3)			SDL API Reference		    SDL_SetEventFilter(3)

       SDL_SetEventFilter-  Sets  up a filter to process all events before they are posted to the
       event queue.

       #include "SDL.h"

       void SDL_SetEventFilter(SDL_EventFilter filter);

       This function sets up a filter to process all events before they are posted to  the  event
       queue. This is a very powerful and flexible feature. The filter is prototyped as:

       typedef int (*SDL_EventFilter)(const SDL_Event *event);

	If  the  filter  returns  1,  then  the  event will be added to the internal queue. If it
       returns 0, then the event will be dropped from the queue. This allows selective	filtering
       of dynamically.

       There  is  one  caveat when dealing with the SDL_QUITEVENT event type. The event filter is
       only called when the window manager desires to close the application window. If the  event
       filter returns 1, then the window will be closed, otherwise the window will remain open if
       possible. If the quit event is generated by an interrupt signal, it will bypass the inter-
       nal queue and be delivered to the application at the next event poll.


	      Events pushed onto the queue with SDL_PushEvent or SDL_PeepEvents do not get passed
	      through the event filter.


	      Be Careful! The event filter function may run in a different thread so  be  careful
	      what you do within it.

       SDL_Event, SDL_GetEventFilter, SDL_PushEvent

SDL				      Tue 11 Sep 2001, 22:59		    SDL_SetEventFilter(3)

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