SvgPathSegClosePath.cs :  » GUI » SharpVectorGraphics » SharpVectors » Dom » Svg » C# / CSharp Open Source

using System;
using System.Drawing;
using System.Drawing.Drawing2D;


namespace SharpVectors.Dom.Svg{
  /// <summary>
  /// Summary description for SvgPathSegClosePath.
  /// </summary>
  public class SvgPathSegClosePath : SvgPathSeg, ISvgPathSegClosePath
  {
    internal SvgPathSegClosePath() : base(SvgPathSegType.ClosePath)
    {
    }

    public override PointF AbsXY
    {
      get
      {
        SvgPathSeg item = this;
      
        while(item != null && !(item is SvgPathSegMoveto))
        {
          item = item.PreviousSeg;
        }

        if(item == null)
        {
          return new PointF(0,0);
        }
        else
        {
          return item.AbsXY;
        }
      }
    }

    public override float StartAngle
    {
      get
      {
        SvgPathSeg prevSeg = PreviousSeg;
        PointF prevPoint;
        if(prevSeg == null)
        {
          prevPoint = new PointF(0,0);
        }
        else
        {
          prevPoint = prevSeg.AbsXY;
        }
        PointF curPoint = AbsXY;

        float dx = curPoint.X - prevPoint.X;
        float dy = curPoint.Y - prevPoint.Y;

        float a = (float)(Math.Atan2(dy, dx) * 180 / Math.PI);
        a += 270;
        a %= 360;
        return a;
      }
    }

    public override float EndAngle
    {
      get
      {
        float a = StartAngle;
        a += 180;
        a %= 360;
        return a;
      }
    }

    public override string PathText
    {
      get
      {
        return "z";
      }
    }
  }
}