CentOS 7.0 - man page for sdl_seteventfilter (centos section 3)
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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
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
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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