ALLEGRO_EVENT_SOURCE
typedef struct ALLEGRO_EVENT_SOURCE ALLEGRO_EVENT_SOURCE;
An event source is any object which can generate events. For example, an ALLEGRO_DISPLAY can generate events, and you can get the ALLEGRO_EVENT_SOURCE pointer from an ALLEGRO_DISPLAY with al_get_display_event_source.
You may create your own "user" event sources that emit custom events.
See also: ALLEGRO_EVENT, al_init_user_event_source, al_emit_user_event
Examples: ex_native_filechooser, ex_user_events
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