private void GeneratePreview(FrameworkElement printElement, PrinterOrientation orientation)
{
if (printDoc != null)
{
printDoc.Close();
}
printDoc = VisualToXpsDocument(printElement, orientation);
docViewer.Document = printDoc.GetFixedDocumentSequence();
}
public PrintPreviewWindow(Image image = null, PrinterOrientation orientation = PrinterOrientation.Portrait)
{
InitializeComponent();
printElement = image;
printerOrientation = orientation;
targetPrinterOrientation = orientation;
if (image == null)
{
int width = (int)Math.Max(printDialog.PrintableAreaHeight, printDialog.PrintableAreaWidth);
int height = (int)Math.Min(printDialog.PrintableAreaHeight, printDialog.PrintableAreaWidth);
image = GisEditor.ActiveMap.GetPrintingImage(width, height);
}
GeneratePreview(image, orientation);
docViewer.FitToMaxPagesAcross();
}
private XpsDocument VisualToXpsDocument(FrameworkElement printContent, PrinterOrientation orientation)
{
if (File.Exists(printPreviewTempPathFileName))
{
File.Delete(printPreviewTempPathFileName);
}
XpsDocument xpsDocument = new XpsDocument(printPreviewTempPathFileName, FileAccess.ReadWrite);
FixedPage page = new FixedPage();
if (printContent.Parent != null && printContent.Parent is FixedPage)
{
((FixedPage)printContent.Parent).Children.Remove(printContent);
}
page.Children.Add(printContent);
if (this.printerOrientation == orientation)
{
page.Width = printContent.Width;
page.Height = printContent.Height;
}
else
{
page.Width = printContent.Height;
page.Height = printContent.Width;
}
PageContent pageContent = new PageContent();
((IAddChild)pageContent).AddChild(page);
FixedDocument doc = new FixedDocument();
doc.Pages.Add(pageContent);
XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
writer.Write(doc);
return(xpsDocument);
}
private void Portrait_Click(object sender, RoutedEventArgs e)
{
targetPrinterOrientation = PrinterOrientation.Portrait;
GeneratePreview(printElement, PrinterOrientation.Portrait);
}
private void Landscape_Click(object sender, RoutedEventArgs e)
{
targetPrinterOrientation = PrinterOrientation.Landscape;
GeneratePreview(printElement, PrinterOrientation.Landscape);
}
