/// <summary>
/// 要素の削除
/// </summary>
/// <param name="item"></param>
public void RemoveItem(IRatioItem item)
{
this.items.Remove(item);
CalcRatio();
}
/// <summary>
/// 要素の追加
/// </summary>
/// <param name="item"></param>
public void AddItem(IRatioItem item)
{
this.items.Add(item);
CalcRatio();
}
