called when the drag object enters this object

drag,enter;

EFL_UI_DND_EVENT_DRAG_ENTER(void)

static void
on_efl_ui_dnd_event_drag_enter(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_UI_DND_EVENT_DRAG_ENTER, on_efl_ui_dnd_event_drag_enter, d);
}