bool event(GdkEvent event);

Rarely-used function. This function is used to emit the event signals on a widget (those signals should never be emitted without using this function to do so). If you want to synthesize an event though, don't use this function; instead, use main_do_event() so the event will behave as if it were in the event queue. Don't synthesize expose events; instead, use invalidate_rect() to invalidate a region of the window.