// --------------------- AdjustFlowDocumentToPage ---------------------
/// <summary>
/// Fits a given flow document to a specified media size.</summary>
/// <param name="ipd">
/// The document paginator containing the flow document.</param>
/// <param name="pq">
/// The print queue the document will be output to.
public Visual AdjustFlowDocumentToPage(
DocumentPaginator idp, PrintQueue pq)
{
const double inch = 96;
PrintTicket pt = pq.UserPrintTicket;
// Get the media size.
double width = pt.PageMediaSize.Width.Value;
double height = pt.PageMediaSize.Height.Value;
// Set the margins.
double leftmargin = 1.25 * inch;
double rightmargin = 1.25 * inch;
double topmargin = 1 * inch;
double bottommargin = 1 * inch;
// Calculate the content size.
double contentwidth = width - leftmargin - rightmargin;
double contentheight = height - topmargin - bottommargin;
idp.PageSize = new Size(contentwidth, contentheight);
DocumentPage p = idp.GetPage(0);
// Create a wrapper visual for transformation and add extras.
ContainerVisual page = new ContainerVisual();
page.Children.Add(p.Visual);
DrawingVisual title = new DrawingVisual();
using (DrawingContext ctx = title.RenderOpen())
{
Typeface typeface = new Typeface("Times New Roman");
Brush pen = Brushes.Black;
FormattedText text =
new FormattedText("Page 0",
System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight, typeface, 14, pen);
ctx.DrawText(text, new Point(inch / 4, -inch / 2));
}
page.Children.Add(title);
page.Transform = new TranslateTransform(leftmargin, topmargin);
return page;
}
private Border GetPageUiElement(int i, DocumentPaginator paginator, double scale)
{
var source = paginator.GetPage(i);
var border = new Border() { Background = Brushes.White };
border.Margin = new Thickness(10 * scale);
border.BorderBrush = Brushes.DarkGray;
border.BorderThickness = new Thickness(1);
//var margin = PrintUtility.GetPageMargin(CurrentPrinterName);
var margin = new Thickness();
var rectangle = new Rectangle();
rectangle.Width = ((source.Size.Width * 0.96 - (margin.Left + margin.Right)) * scale);
rectangle.Height = ((source.Size.Height * 0.96 - (margin.Top + margin.Bottom)) * scale);
rectangle.Margin = new Thickness(margin.Left * scale, margin.Top * scale, margin.Right * scale, margin.Bottom * scale);
rectangle.Fill = Brushes.White;
var vb = new VisualBrush(source.Visual);
vb.Opacity = 1;
vb.Stretch = Stretch.Uniform;
rectangle.Fill = vb;
border.Child = rectangle;
return border;
}
private RenderTargetBitmap GetPageBitmap(DocumentPaginator documentPaginator, int pageNumber, Parameters parameters)
{
const double dpiConst = 96.0;
double dpi = parameters.Dpi;
var size = parameters.RequiredSize ?? new Size();
Func<int, bool> isSizeDefined = requiredSize => requiredSize > 0;
Action<int, double> calcDpi = (requiredSize, pageSize) =>
{
if (isSizeDefined(requiredSize))
{
dpi = (requiredSize / pageSize) * dpiConst;
}
};
try
{
using (var page = documentPaginator.GetPage(pageNumber))
{
if (!size.IsEmpty)
{
var portrait = page.Size.Height >= page.Size.Width;
if (portrait || !isSizeDefined(size.Width))
{
calcDpi(size.Height, page.Size.Height);
}
if (!portrait || !isSizeDefined(size.Height))
{
calcDpi(size.Width, page.Size.Width);
}
}
var ratio = dpi / dpiConst;
var bitmap = new RenderTargetBitmap((int)Math.Round(page.Size.Width * ratio),
(int)Math.Round(page.Size.Height * ratio), dpi, dpi, PixelFormats.Pbgra32);
bitmap.Render(page.Visual);
// Memory leak fix.
// http://social.msdn.microsoft.com/Forums/en/wpf/thread/c6511918-17f6-42be-ac4c-459eeac676fd
((FixedPage)page.Visual).UpdateLayout();
return bitmap;
}
}
catch (XamlParseException ex)
{
throw new ConversionException(ex.Message, pageNumber + 1, ex);
}
}
