/// <summary>
/// 画线
/// </summary>
/// <param name="canvas"></param>
/// <param name="pen"></param>
/// <param name="p1"></param>
/// <param name="p2"></param>
public void DrawLine(ICanvas canvas, Pen pen, UnitPoint p1, UnitPoint p2)
{
m_canvas.DrawLine(canvas, pen, p1, p2);
}
