/// <summary>
/// Handler for the Print command.
/// </summary>
protected override void OnPrintCommand()
{
#if !DONOTREFPRINTINGASMMETA
System.Windows.Xps.XpsDocumentWriter docWriter;
System.Printing.PrintDocumentImageableArea ia = null;
FlowDocumentPaginator paginator;
FlowDocument document = Document as FlowDocument;
Thickness pagePadding;
// Only one printing job is allowed.
if (_printingState != null)
{
return;
}
// If the document is FlowDocument, do custom printing. Otherwise go through default path.
if (document != null)
{
// Show print dialog.
docWriter = System.Printing.PrintQueue.CreateXpsDocumentWriter(ref ia);
if (docWriter != null && ia != null)
{
// Store the current state of the document in the PrintingState
paginator = ((IDocumentPaginatorSource)document).DocumentPaginator as FlowDocumentPaginator;
_printingState = new FlowDocumentPrintingState();
_printingState.XpsDocumentWriter = docWriter;
_printingState.PageSize = paginator.PageSize;
_printingState.PagePadding = document.PagePadding;
_printingState.IsSelectionEnabled = IsSelectionEnabled;
// Since _printingState value is used to determine CanExecute state, we must invalidate that state.
CommandManager.InvalidateRequerySuggested();
// Register for XpsDocumentWriter events.
docWriter.WritingCompleted += new WritingCompletedEventHandler(HandlePrintCompleted);
docWriter.WritingCancelled += new WritingCancelledEventHandler(HandlePrintCancelled);
// Add PreviewCanExecute handler to have a chance to disable UI Commands during printing.
CommandManager.AddPreviewCanExecuteHandler(this, new CanExecuteRoutedEventHandler(PreviewCanExecuteRoutedEventHandler));
// Suspend layout on DocumentPageViews.
ReadOnlyCollection<DocumentPageView> pageViews = PageViews;
for (int index = 0; index < pageViews.Count; index++)
{
pageViews[index].SuspendLayout();
}
// Disable TextSelection, if currently enabled.
if (IsSelectionEnabled)
{
IsSelectionEnabled = false;
}
// Change the PageSize and PagePadding for the document to match the CanvasSize for the printer device.
paginator.PageSize = new Size(ia.MediaSizeWidth, ia.MediaSizeHeight);
pagePadding = document.ComputePageMargin();
document.PagePadding = new Thickness(
Math.Max(ia.OriginWidth, pagePadding.Left),
Math.Max(ia.OriginHeight, pagePadding.Top),
Math.Max(ia.MediaSizeWidth - (ia.OriginWidth + ia.ExtentWidth), pagePadding.Right),
Math.Max(ia.MediaSizeHeight - (ia.OriginHeight + ia.ExtentHeight), pagePadding.Bottom));
// Send DocumentPaginator to the printer.
docWriter.WriteAsync(paginator);
}
}
else
{
base.OnPrintCommand();
}
#endif // DONOTREFPRINTINGASMMETA
}
/// <summary>
/// Handler for the Print command.
/// </summary>
protected virtual void OnPrintCommand()
{
#if !DONOTREFPRINTINGASMMETA
System.Windows.Xps.XpsDocumentWriter docWriter;
System.Printing.PrintDocumentImageableArea ia = null;
FlowDocumentPaginator paginator;
Thickness pagePadding;
// Only one printing job is allowed.
if (_printingState != null)
{
return;
}
// If the document is FlowDocument, do custom printing. Otherwise go through default path.
if (Document != null)
{
// Show print dialog.
docWriter = System.Printing.PrintQueue.CreateXpsDocumentWriter(ref ia);
if (docWriter != null && ia != null)
{
// Suspend layout on FlowDocumentView.
if (RenderScope != null)
{
RenderScope.SuspendLayout();
}
// Store the current state of the document in the PrintingState
paginator = ((IDocumentPaginatorSource)Document).DocumentPaginator as FlowDocumentPaginator;
_printingState = new FlowDocumentPrintingState();
_printingState.XpsDocumentWriter = docWriter;
_printingState.PageSize = paginator.PageSize;
_printingState.PagePadding = Document.PagePadding;
_printingState.IsSelectionEnabled = IsSelectionEnabled;
_printingState.ColumnWidth = Document.ColumnWidth;
// Since _printingState value is used to determine CanExecute state, we must invalidate that state.
CommandManager.InvalidateRequerySuggested();
// Register for XpsDocumentWriter events.
docWriter.WritingCompleted += new WritingCompletedEventHandler(HandlePrintCompleted);
docWriter.WritingCancelled += new WritingCancelledEventHandler(HandlePrintCancelled);
// Add PreviewCanExecute handler to have a chance to disable UI Commands during printing.
if (_contentHost != null)
{
CommandManager.AddPreviewCanExecuteHandler(_contentHost, new CanExecuteRoutedEventHandler(PreviewCanExecuteRoutedEventHandler));
}
// Disable TextSelection, if currently enabled.
if (IsSelectionEnabled)
{
SetCurrentValueInternal(IsSelectionEnabledProperty, BooleanBoxes.FalseBox);
}
// Change the PageSize and PagePadding for the document to match the CanvasSize for the printer device.
paginator.PageSize = new Size(ia.MediaSizeWidth, ia.MediaSizeHeight);
pagePadding = Document.ComputePageMargin();
Document.PagePadding = new Thickness(
Math.Max(ia.OriginWidth, pagePadding.Left),
Math.Max(ia.OriginHeight, pagePadding.Top),
Math.Max(ia.MediaSizeWidth - (ia.OriginWidth + ia.ExtentWidth), pagePadding.Right),
Math.Max(ia.MediaSizeHeight - (ia.OriginHeight + ia.ExtentHeight), pagePadding.Bottom));
Document.ColumnWidth = double.PositiveInfinity;
// Send DocumentPaginator to the printer.
docWriter.WriteAsync(paginator);
}
else
{
OnPrintCompleted();
}
}
else
{
OnPrintCompleted();
}
#endif // DONOTREFPRINTINGASMMETA
}