title: wpf inherited DocumentViewer and Frame Navigation
body: <p>I wrote a class that inherits from DocumentViewer</p>
  
  <pre><code>public class MyDocumentViewer : DocumentViewer
  {
      public bool Landscape{ get; set; }
  
      protected override void OnPrintCommand()
      {
          // get a print dialog, defaulted to default printer and default printer's preferences.
          PrintDialog printDialog = new PrintDialog();
          printDialog.PrintQueue = System.Printing.LocalPrintServer.GetDefaultPrintQueue();
          printDialog.PrintTicket = printDialog.PrintQueue.DefaultPrintTicket;
  
          // get a reference to the FixedDocumentSequence for the viewer.
          FixedDocumentSequence docSeq = this.Document as FixedDocumentSequence;
  
          // set the default page orientation based on the desired output.
          if(!Landscape)
              printDialog.PrintTicket.PageOrientation = System.Printing.PageOrientation.Portrait;
          else
              printDialog.PrintTicket.PageOrientation = System.Printing.PageOrientation.Landscape;
  
          if (printDialog.ShowDialog() == true)
          {
              // set the print ticket for the document sequence and write it to the printer.
              docSeq.PrintTicket = printDialog.PrintTicket;
  
              XpsDocumentWriter writer = System.Printing.PrintQueue.CreateXpsDocumentWriter(printDialog.PrintQueue);
              writer.WriteAsync(docSeq, printDialog.PrintTicket);
          }
      }
  
      protected override void OnManipulationBoundaryFeedback(System.Windows.Input.ManipulationBoundaryFeedbackEventArgs e)
      {
          base.OnManipulationBoundaryFeedback(e);
          e.Handled = true;
      }
  }
  </code></pre>
  
  <p>I use this viewer inter alia to show XPS file with bookmarks, and after navigating to a bookmark, the document will be reloaded in the standard DocumentViewer.
  I know how to change the style after reloading but I cannot find how to resolve this problem.</p>
  
  <p>Is it possible to change default viewer for FixedDocument ?</p>
  
  <p>If not, maybe somebody knows another way to resolve it. </p>