Пример #1
0
        /// <summary>
        /// Initializes a new instance of the <see cref="DocumentPaginatorEx" /> class.
        /// </summary>
        /// <param name="document">The document.</param>
        /// <param name="printableArea">The printable area size.</param>
        /// <param name="range">The print page range.</param>
        public DocumentPaginatorEx(FlowDocument document, Size printableArea, PageRange range)
        {
            // Clone the source document's content into a new FlowDocument.
            // This is because the pagination for the printer needs to be
            // done differently than the pagination for the displayed page.
            // We print the copy, rather that the original FlowDocument.
            var stream = new MemoryStream();
            var source = new TextRange(document.ContentStart, document.ContentEnd);

            source.Save(stream, DataFormats.Xaml);
            var documentCopy = new FlowDocument();
            var dest         = new TextRange(documentCopy.ContentStart, documentCopy.ContentEnd);

            dest.Load(stream, DataFormats.Xaml);

            // Ready to go on the copy of the document
            var paginatorSource = documentCopy as IDocumentPaginatorSource;

            _flowDocumentPaginator = paginatorSource.DocumentPaginator;
            CurrentPage            = 0;

            TotalPrintableArea = printableArea;
            var height = printableArea.Height;
            var width  = printableArea.Width;

            var docEx = document as FlowDocumentEx;

            if (docEx != null)
            {
                width  -= (docEx.PrintMargin.Left + docEx.PrintMargin.Right);
                height -= (docEx.PrintMargin.Top + docEx.PrintMargin.Bottom);
                DocumentPrintMargin = docEx.PrintMargin;
                OriginalPrintMargin = docEx.PrintMargin;

                Watermark = docEx.PrintWatermark;
                if (Watermark != null)
                {
                    Watermark.Resources   = document.Resources;
                    Watermark.DataContext = document.DataContext;
                    Watermark.Measure(printableArea);
                    Watermark.Arrange(new Rect(0, 0, Watermark.DesiredSize.Width, Watermark.DesiredSize.Height));
                }

                Header = docEx.PageHeader;
                if (Header != null)
                {
                    Header.Resources   = document.Resources;
                    Header.DataContext = document.DataContext;
                    Header.Width       = width;
                    Header.Measure(new Size(width, double.PositiveInfinity));
                    Header.Height = Header.DesiredSize.Height; // These two lines attempt to fix the size as desired and make sure it is properly measured at that
                    Header.Measure(new Size(width, Header.DesiredSize.Height));
                    Header.Arrange(new Rect(0, 0, Header.DesiredSize.Width, Header.DesiredSize.Height));
                    height -= Header.DesiredSize.Height;
                    DocumentPrintMargin = new Thickness(DocumentPrintMargin.Left, DocumentPrintMargin.Top + Header.DesiredSize.Height, DocumentPrintMargin.Right, DocumentPrintMargin.Bottom);
                }

                Footer = docEx.PageFooter;
                if (Footer != null)
                {
                    Footer.Resources   = document.Resources;
                    Footer.DataContext = document.DataContext;
                    Footer.Width       = width;
                    Footer.Measure(new Size(width, double.PositiveInfinity));
                    Footer.Height = Footer.DesiredSize.Height; // These two lines attempt to fix the size as desired and make sure it is properly measured at that
                    Footer.Measure(new Size(width, Footer.DesiredSize.Height));
                    Footer.Arrange(new Rect(0, 0, Footer.DesiredSize.Width, Footer.DesiredSize.Height));
                    height -= Footer.DesiredSize.Height;
                    DocumentPrintMargin = new Thickness(DocumentPrintMargin.Left, DocumentPrintMargin.Top, DocumentPrintMargin.Right, DocumentPrintMargin.Bottom + Footer.DesiredSize.Height);
                }
            }
            else
            {
                DocumentPrintMargin = new Thickness();
            }

            _flowDocumentPaginator.PageSize = new Size(width, height);
            _flowDocumentPaginator.ComputePageCount();
            TotalPages = _flowDocumentPaginator.PageCount;

            Range = range;
        }