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

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

#if TEST
using NUnit.Framework;
#endif

namespace SharpVectors.Dom.Svg{
  /// <summary>
  /// Summary description for SvgPathSegCurvetoCubicSmoothAbs.
  /// </summary>
  public class SvgPathSegCurvetoCubicSmoothRel : SvgPathSegCurvetoCubic, ISvgPathSegCurvetoCubicSmoothRel
  {
        #region constructors
    internal SvgPathSegCurvetoCubicSmoothRel(float x, float y, float x2, float y2) : base(SvgPathSegType.CurveToCubicSmoothRel)
    {
      this.x = x;
      this.y = y;
      this.x2 = x2;
      this.y2 = y2;
    }
        #endregion

        #region implementation of ISvgPathSegCurvetoCubicSmoothRel
    private float x;
    public float X
    {
      get{return x;}
      set{x = value;}
    }      

    private float y;    
    public float Y
    {
      get{return y;}
      set{y = value;}
    }      

    private float x2;
    public float X2    
    {
      get{return x2;}
      set{x2 = value;}
    }      

    private float y2;    
        public float Y2
        {
            get{return y2;}
          set{y2 = value;}
        }
        #endregion

        #region public methods
    public override PointF AbsXY
    {
      get
      {
        SvgPathSeg prevSeg = PreviousSeg;
        PointF prevPoint;
        if(prevSeg == null) prevPoint = new PointF(0,0);
        else prevPoint = prevSeg.AbsXY;
        return new PointF(prevPoint.X + X, prevPoint.Y + Y);
      }
    }

    public override PointF CubicX1Y1
    {
      get
      {
        SvgPathSeg prevSeg = PreviousSeg;
        if(prevSeg == null || !(prevSeg is SvgPathSegCurvetoCubic))
        {
          return prevSeg.AbsXY;
        }
        else
        {
          PointF prevXY = prevSeg.AbsXY;
          PointF prevX2Y2 = ((SvgPathSegCurvetoCubic)prevSeg).CubicX2Y2;

          return new PointF(2 * prevXY.X - prevX2Y2.X, 2 * prevXY.Y - prevX2Y2.Y);
        }
      }
    }

    public override PointF CubicX2Y2
    {
      get
      {
        SvgPathSeg prevSeg = PreviousSeg;
        PointF prevPoint;
        if(prevSeg == null) prevPoint = new PointF(0,0);
        else prevPoint = prevSeg.AbsXY;
        return new PointF(prevPoint.X + X2, prevPoint.Y + Y2);
      }
    }

    public override string PathText
    {
      get
      {
        StringBuilder sb = new StringBuilder();
        sb.Append(PathSegTypeAsLetter);
        sb.Append(X2);
        sb.Append(",");
        sb.Append(Y2);
        sb.Append(",");
        sb.Append(X);
        sb.Append(",");
        sb.Append(Y);

        return sb.ToString();
      }
    }
        #endregion

        #region unit tests
        #if TEST
        [TestFixture]
        public class CubicSmoothRelTests : CubicTests
        {
            public override SvgPathSegList makeSegments()
            {
                return new SvgPathSegList("M-280,10 C-180,-80 -80,-80 10,10 s190,90 290,0", false);
            }

            public override SvgPathSegCurvetoCubic getTestSegment()
            {
                return (SvgPathSegCurvetoCubic) segments[2];
            }
        }
        #endif
        #endregion
  }
}