SvgSortElementsCallback Delegate

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.Forms.DocumentWriters; 
using Leadtools.Svg; 
 
using Leadtools.Document.Writer; 
 
public void SortElementsExample() 
{ 
   // The source PDF file 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Leadtools.pdf"); 
   string dstFileName = Path.Combine(LEAD_VARS.ImagesDir, "Example.txt"); 
 
   // SVG sort callback handler 
   SvgSortElementsCallback sortCallback = (callabackDocument, info, userData) => 
   { 
      StreamWriter writer = userData as StreamWriter; 
      // Is it text? 
      SvgTextData textData = info.TextData; 
      if (textData != null) 
      { 
         // Yes, print it to the console 
         writer.Write(textData.Text + " "); 
 
         // See if its end of line 
         var len = textData.Text.Length; 
         if ((textData.CharacterFlags[len - 1] & SvgTextCharacterFlags.EndOfLine) == SvgTextCharacterFlags.EndOfLine) 
            writer.WriteLine(); 
      } 
 
      return true; 
   }; 
 
   using (var codecs = new RasterCodecs()) 
   { 
      // Set 300 as the default value for loading document files 
      codecs.Options.RasterizeDocument.Load.Resolution = 300; 
 
      // get the number of pages 
      int pageCount = codecs.GetTotalPages(srcFileName); 
 
      // Create a writer for the output text file 
      using (StreamWriter writer = File.CreateText(dstFileName)) 
      { 
         for (int pageNumber = 1; pageNumber <= pageCount; pageNumber++) 
         { 
            // Load this page as SVG, we are interested in the text only so 
            // we will ask LEADTOOLS to skip other elements 
            CodecsLoadSvgOptions loadSvgOptions = new CodecsLoadSvgOptions(); 
            loadSvgOptions.DropShapes = false; 
            loadSvgOptions.DropImages = true; 
            loadSvgOptions.DropShapes = true; 
            using (SvgDocument svgDocument = codecs.LoadSvg(srcFileName, pageNumber, loadSvgOptions) as SvgDocument) 
            { 
               // Sort requires a flat document, so check for that 
               if (!svgDocument.IsFlat) 
                  svgDocument.Flat(null); 
 
               if (!svgDocument.Bounds.IsValid) 
                  svgDocument.CalculateBounds(false); 
 
               SvgSortOptions sortOptions = new SvgSortOptions(); 
               sortOptions.ExtractText = SvgExtractText.Word; 
               sortOptions.SortFlags = SvgSortFlags.Default; 
               Console.WriteLine("Text for page {0}", pageNumber); 
               svgDocument.SortElements(sortOptions, sortCallback, writer); 
            } 
         } 
 
         // Show the text file 
         System.Diagnostics.Process.Start(dstFileName); 
      } 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}