C# Drawing.XBrush類代碼示例

 public BarCodeRenderInfo(XGraphics gfx, XBrush brush, XFont font, XPoint position)
 {
   Gfx = gfx;
   Brush = brush;
   Font = font;
   Position = position;
 }

		///<summary>The pdfSharp version of drawstring.  g is used for measurement.  scaleToPix scales xObjects to pixels.</summary>
		public static void DrawStringX(XGraphics xg,Graphics g,double scaleToPix,string str,XFont xfont,XBrush xbrush,XRect xbounds, XStringAlignment sa) {
			//There are two coordinate systems here: pixels (used by us) and points (used by PdfSharp).
			//MeasureString and ALL related measurement functions must use pixels.
			//DrawString is the ONLY function that uses points.
			//pixels:
			Rectangle bounds=new Rectangle((int)(scaleToPix*xbounds.Left),
				(int)(scaleToPix*xbounds.Top),
				(int)(scaleToPix*xbounds.Width),
				(int)(scaleToPix*xbounds.Height));
			FontStyle fontstyle=FontStyle.Regular;
			if(xfont.Style==XFontStyle.Bold) {
				fontstyle=FontStyle.Bold;
			}
			//pixels: (except Size is em-size)
			Font font=new Font(xfont.Name,(float)xfont.Size,fontstyle);
			//pixels:
			SizeF fit=new SizeF((float)(bounds.Width-rightPad),(float)(font.Height));
			StringFormat format=StringFormat.GenericTypographic;
			//pixels:
			float pixelsPerLine=LineSpacingForFont(font.Name) * (float)font.Height;
			float lineIdx=0;
			int chars;
			int lines;
			//points:
			RectangleF layoutRectangle;
			for(int ix=0;ix<str.Length;ix+=chars) {
				if(bounds.Y+topPad+pixelsPerLine*lineIdx>bounds.Bottom) {
					break;
				}
				//pixels:
				g.MeasureString(str.Substring(ix),font,fit,format,out chars,out lines);
				//PdfSharp isn't smart enough to cut off the lower half of a line.
				//if(bounds.Y+topPad+pixelsPerLine*lineIdx+font.Height > bounds.Bottom) {
				//	layoutH=bounds.Bottom-(bounds.Y+topPad+pixelsPerLine*lineIdx);
				//}
				//else {
				//	layoutH=font.Height+2;
				//}
				//use points here:
				float adjustTextDown=10f;//this value was arrived at by trial and error.
				layoutRectangle=new RectangleF(
					(float)xbounds.X,
					//(float)(xbounds.Y+(float)topPad/scaleToPix+(pixelsPerLine/scaleToPix)*lineIdx),
					(float)(xbounds.Y+adjustTextDown+(pixelsPerLine/scaleToPix)*lineIdx),
					(float)xbounds.Width+50,//any amount of extra padding here will not cause malfunction
					0);//layoutH);
				XStringFormat sf=XStringFormats.Default;
				sf.Alignment=sa;
				//sf.LineAlignment= XLineAlignment.Near;
				//xg.DrawString(str.Substring(ix,chars),xfont,xbrush,layoutRectangle,sf);
				xg.DrawString(str.Substring(ix,chars),xfont,xbrush,(double)layoutRectangle.Left,(double)layoutRectangle.Top,sf);
				lineIdx+=1;
			}
		}

    /// <summary>
    /// Renders the OMR code.
    /// </summary>
    protected internal override void Render(XGraphics gfx, XBrush brush, XFont font, XPoint position)
    {
      XGraphicsState state = gfx.Save();

      switch (this.direction)
      {
        case CodeDirection.RightToLeft:
          gfx.RotateAtTransform(180, position);
          break;

        case CodeDirection.TopToBottom:
          gfx.RotateAtTransform(90, position);
          break;

        case CodeDirection.BottomToTop:
          gfx.RotateAtTransform(-90, position);
          break;
      }

      //XPoint pt = center - this.size / 2;
      XPoint pt = position - CodeBase.CalcDistance(AnchorType.TopLeft, this.anchor, this.size);
      uint value;
      uint.TryParse(this.text, out value);
#if true
      // HACK: Project Wallenwein: set LK
      value |= 1;
      this.synchronizeCode = true;
#endif
      if (this.synchronizeCode)
      {
        XRect rect = new XRect(pt.x, pt.y, this.makerThickness, this.size.height);
        gfx.DrawRectangle(brush, rect);
        pt.x += 2 * this.makerDistance;
      }
      for (int idx = 0; idx < 32; idx++)
      {
        if ((value & 1) == 1)
        {
          XRect rect = new XRect(pt.x + idx * this.makerDistance, pt.y, this.makerThickness, this.size.height);
          gfx.DrawRectangle(brush, rect);
        }
        value = value >> 1;
      }
      gfx.Restore(state);
    }

 void ElliottsDiagramCalculation()
 {
     //Decide Zone for both figures from this calculation
     zone = "Non-Explosive Zone";
     brush = XBrushes.Green;
 }

 /// <summary>
 /// Draws the specified bar code.
 /// </summary>
 public void DrawBarCode(BarCodes.BarCode barcode, XBrush brush, XFont font, XPoint position)
 {
   barcode.Render(this, brush, font, position);
 }

 /// <summary>
 /// Draws the specified text string.
 /// </summary>
 public void DrawString(string s, XFont font, XBrush brush, RectangleF layoutRectangle, XStringFormat format)
 {
   DrawString(s, font, brush, new XRect(layoutRectangle), format);
 }

    // ----- fill -----

    /// <summary>
    /// Draws a graphical path.
    /// </summary>
    public void DrawPath(XBrush brush, XGraphicsPath path)
    {
      if (brush == null)
        throw new ArgumentNullException("brush");
      if (path == null)
        throw new ArgumentNullException("path");

      if (this.drawGraphics)
      {
#if GDI
        if (this.targetContext == XGraphicTargetContext.GDI)
          this.gfx.FillPath(brush.RealizeGdiBrush(), path.gdipPath);
#endif
#if WPF
        if (this.targetContext == XGraphicTargetContext.WPF)
          this.dc.DrawGeometry(brush.RealizeWpfBrush(), null, path.pathGeometry);
#endif
      }

      if (this.renderer != null)
        this.renderer.DrawPath(null, brush, path);
    }

 /// <summary>
 /// Draws a closed cardinal spline defined by an array of points.
 /// </summary>
 public void DrawClosedCurve(XBrush brush, System.Windows.Point[] points)
 {
   DrawClosedCurve(null, brush, MakeXPointArray(points), XFillMode.Alternate, 0.5);
 }

    /// <summary>
    /// Draws a pie defined by an ellipse.
    /// </summary>
    public void DrawPie(XPen pen, XBrush brush, double x, double y, double width, double height, double startAngle, double sweepAngle)
    {
      if (pen == null && brush == null)
        throw new ArgumentNullException("pen", PSSR.NeedPenOrBrush);

      if (this.drawGraphics)
      {
#if GDI
        if (this.targetContext == XGraphicTargetContext.GDI)
        {
          this.gfx.FillPie(brush.RealizeGdiBrush(), (float)x, (float)y, (float)width, (float)height, (float)startAngle, (float)sweepAngle);
          this.gfx.DrawPie(pen.RealizeGdiPen(), (float)x, (float)y, (float)width, (float)height, (float)startAngle, (float)sweepAngle);
        }
#endif
#if WPF
        if (this.targetContext == XGraphicTargetContext.WPF)
        {
#if !SILVERLIGHT
          System.Windows.Media.Brush wpfBrush = brush != null ? brush.RealizeWpfBrush() : null;
          System.Windows.Media.Pen wpfPen = pen != null ? pen.RealizeWpfPen() : null;
          System.Windows.Point center = new System.Windows.Point(x + width / 2, y + height / 2);
          System.Windows.Point startArc;
          ArcSegment arc = GeometryHelper.CreateArcSegment(x, y, width, height, startAngle, sweepAngle, out startArc);
          PathFigure figure = new PathFigure();
          figure.StartPoint = center;
          figure.Segments.Add(new LineSegment(startArc, true));
          figure.Segments.Add(arc);
          figure.IsClosed = true;
          PathGeometry geo = new PathGeometry();
          geo.Figures.Add(figure);
          this.dc.DrawGeometry(wpfBrush, wpfPen, geo);
#else
          // AGHACK
#endif
        }
#endif
      }

      if (this.renderer != null)
        this.renderer.DrawPie(pen, brush, x, y, width, height, startAngle, sweepAngle);
    }

 /// <summary>
 /// Draws the specified data matrix code.
 /// </summary>
 public void DrawMatrixCode(BarCodes.MatrixCode matrixcode, XBrush brush, XPoint position)
 {
   matrixcode.Render(this, brush, position);
 }

 /// <summary>
 /// When defined in a derived class renders the code.
 /// </summary>
 protected internal abstract void Render(XGraphics gfx, XBrush brush, XFont font, XPoint position);