Evas_Object *btn = elm_button_add(navi_ex);
item = elm_navigationbar_ex_item_push(navi_ex, btn, "topbar_1fn");
elm_navigationbar_ex_item_title_button_set(item, "button", NULL, ELM_NAVIGATIONBAR_EX_FUNCTION_BUTTON1, NULL, NULL);
Evas_Object *btn = elm_button_add(navi_ex);
item = elm_navigationbar_ex_item_push(navi_ex, btn, "topbar_1fn");
elm_navigationbar_ex_item_title_button_set(item, "button", NULL, ELM_NAVIGATIONBAR_EX_FUNCTION_BUTTON1, NULL, NULL);