public void Awake()
        {
            BtDef activeBt = null;

            if (m_btDef.FirstOrDefault((_p) => _p.isFocused) == null)
            {
                if (m_btDef.Count > 0)
                {
                    activeBt = m_btDef[0];
                }
            }
            if (activeBt != null)
            {
                activeBt.isFocused         = true;
                m_focusTf.anchoredPosition = activeBt.focusPos;
            }
        }
        public void OnClickHandler(int idx)
        {
            if ((idx < 0) || (idx >= m_btDef.Count))
            {
                return;
            }

            BtDef activeBt = m_btDef[idx];

            if (activeBt.isFocused)
            {
                return;
            }
            var prevFocued = m_btDef.FirstOrDefault((_p) => _p.isFocused);

            if (prevFocued != null)
            {
                prevFocued.isFocused = false;
            }

            activeBt.isFocused         = true;
            m_focusTf.anchoredPosition = activeBt.focusPos;
        }