public bool SetReach(bool isReach)
{
if (_allHais.Count <= 0)
{
return(false);
}
// set last hai reach.
MahjongPai lastHai = _allHais[_allHais.Count - 1];
lastHai.SetReach(isReach);
_curLineRightAligPosX += (MahjongPai.Height - MahjongPai.Width);
return(true);
}