A transition animation has started.

transition,start: Efl.Ui.Spotlight.Transition_Event;

EFL_UI_SPOTLIGHT_EVENT_TRANSITION_START(Efl_Ui_Spotlight_Transition_Event)

static void
on_efl_ui_spotlight_event_transition_start(void *data, const Efl_Event *event)
{
    Efl_Ui_Spotlight_Transition_Event 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_UI_SPOTLIGHT_EVENT_TRANSITION_START, on_efl_ui_spotlight_event_transition_start, d);
}