message box for little vGL

static void messagebox_event_handler(lv_obj_t* obj, lv_event_t event)
{
    if (event == LV_EVENT_VALUE_CHANGED)
    {
        printf("Button:%s\n",lv_mbox_get_active_btn_text(obj));
    }
}

void messageBox_demo(void)
{
    static const char* btns[] = { "Apply","Close","" };
    lv_obj_t* mbox1 = lv_mbox_create(lv_scr_act(), NULL);
    lv_mbox_set_text(mbox1, "A message box with tow buttons");
    lv_mbox_add_btns(mbox1, btns);
    lv_obj_set_width(mbox1, 200);
    lv_obj_set_event_cb(mbox1, messagebox_event_handler);
    lv_obj_align(mbox1, NULL, LV_ALIGN_CENTER, 0, 0);

}