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using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Packaging;
using System.Printing;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Documents.Serialization;
using System.Windows.Media;
using System.Windows.Xps;
using System.Windows.Xps.Packaging;
using System.Windows.Xps.Serialization;
namespace gsview
{
public enum PrintStatus_t
{
PRINT_READY,
PRINT_BUSY,
PRINT_ERROR,
PRINT_CANCELLED
};
/* Class for handling async print progress callback */
public class gsPrintEventArgs : EventArgs
{
private PrintStatus_t m_status;
private bool m_completed;
private int m_page;
public PrintStatus_t Status
{
get { return m_status; }
}
public bool Completed
{
get { return m_completed; }
}
public int Page
{
get { return m_page; }
}
public gsPrintEventArgs(PrintStatus_t status, bool completed, int page)
{
m_completed = completed;
m_status = status;
m_page = page;
}
}
public class gsprint
{
private XpsDocumentWriter m_docWriter = null;
internal delegate void AsyncPrintCallBack(object printObject, gsPrintEventArgs info);
internal event AsyncPrintCallBack PrintUpdate;
private bool m_busy;
public bool IsBusy()
{
return m_busy;
}
public gsprint()
{
m_busy = false;
}
/* Show std. print dialog */
public PrintDialog GetPrintDialog()
{
PrintDialog dlg = new PrintDialog();
/* Current page and page ranges is going to require a little work */
dlg.PageRangeSelection = PageRangeSelection.AllPages;
//dlg.UserPageRangeEnabled = true;
//dlg.CurrentPageEnabled = true;
dlg.SelectedPagesEnabled = false;
m_busy = false;
if (dlg.ShowDialog() == true)
return dlg;
return null;
}
/* Main print entry point */
public void Print(PrintQueue queu, FixedDocumentSequence fixdoc)
{
XpsDocumentWriter docwrite = GetDocWriter(queu);
m_busy = true;
docwrite.WritingPrintTicketRequired +=
new WritingPrintTicketRequiredEventHandler(PrintTicket);
PrintPages(docwrite, fixdoc);
}
/* Send it */
private void PrintPages(XpsDocumentWriter xpsdw, FixedDocumentSequence fixdoc)
{
m_docWriter = xpsdw;
xpsdw.WritingCompleted +=
new WritingCompletedEventHandler(AsyncCompleted);
xpsdw.WritingProgressChanged +=
new WritingProgressChangedEventHandler(AsyncProgress);
xpsdw.WriteAsync(fixdoc);
}
public void CancelAsync()
{
/* ick. This does not work in windows 8. causes crash */
/* https://connect.microsoft.com/VisualStudio/feedback/details/778145/xpsdocumentwriter-cancelasync-cause-crash-in-win8 */
m_docWriter.CancelAsync();
}
/* Done */
private void AsyncCompleted(object sender, WritingCompletedEventArgs e)
{
PrintStatus_t status;
if (e.Cancelled)
status = PrintStatus_t.PRINT_CANCELLED;
else if (e.Error != null)
status = PrintStatus_t.PRINT_ERROR;
else
status = PrintStatus_t.PRINT_READY;
if (PrintUpdate != null)
{
gsPrintEventArgs info = new gsPrintEventArgs(status, true, 0);
PrintUpdate(this, info);
}
m_busy = false;
}
/* Do this update with each fixed document (page) that is handled */
private void AsyncProgress(object sender, WritingProgressChangedEventArgs e)
{
if (PrintUpdate != null)
{
gsPrintEventArgs info = new gsPrintEventArgs(PrintStatus_t.PRINT_BUSY,
false, e.Number);
PrintUpdate(this, info);
}
}
/* Print ticket handling. You can customize for PrintTicketLevel at
FixedDocumentSequencePrintTicket, FixedDocumentPrintTicket,
or FixedPagePrintTicket. We may want to play around with this some */
private void PrintTicket(Object sender, WritingPrintTicketRequiredEventArgs e)
{
if (e.CurrentPrintTicketLevel ==
PrintTicketLevel.FixedDocumentSequencePrintTicket)
{
PrintTicket pts = new PrintTicket();
pts.PageOrientation = PageOrientation.Portrait;
e.CurrentPrintTicket = pts;
}
}
/* Create the document write */
private XpsDocumentWriter GetDocWriter(PrintQueue pq)
{
XpsDocumentWriter xpsdw = PrintQueue.CreateXpsDocumentWriter(pq);
return xpsdw;
}
}
}
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