/// <summary>
/// 根据笔画类型构造。
/// </summary>
/// <param name="t"></param>
public Stroke(strokeType t)
{
type = t;
//name = Enum.GetName(typeof(strokeType), type);
points = new List <PointF>();
selectedPointIndex = 0;
}
/// <summary>
/// 复制构造函数，执行浅复制。
/// <para>如需深复制请使用Clone()函数。</para>
/// </summary>
/// <param name="s"></param>
public Stroke(Stroke s)
{
type = s.type;
//name = Enum.GetName(typeof(strokeType), type);
points = s.Points;
selectedPointIndex = s.selectedPointIndex;
}