Barcodes on metafile not readable
==================================
It is well known that there are differences in scaling when rendering directly to a printer,
and rendering to a metafile for a preview. It seems that nothing can be done about this.
It is unlucky that this is enough to stop the barcodes from being recognised.
A workaround might be to force a Quickrep.Print when the user selects the print
from the preview.
This can be done by amending the code on the button of the form in QRPrev.pas.
Instead of
procedure TQRStandardPreview.PrintClick(Sender: TObject);
begin
      QRPrinter.Print;
end;
try
procedure TQRStandardPreview.PrintClick(Sender: TObject);
begin
      TCustomquickrep(qrprinter.ParentReport).Print;
end;