Object has lost a reference and only one is left. It has just one owner now. Triggered whenever the refcount goes from two to one.
Since 1.22
ownership,unique @hot;
EFL_EVENT_OWNERSHIP_UNIQUE(void, @hot)
static void on_efl_event_ownership_unique(void *data, const Efl_Event *event) { void info = event->info; Eo *obj = event->object; Data *d = data; /* event hander code */ } static void setup_event_handler(Eo *obj, Data *d) { efl_event_callback_add(obj, EFL_EVENT_OWNERSHIP_UNIQUE, on_efl_event_ownership_unique, d); }