[Qt-interest] QPrinter bug?

[Brad Pepers]

I'm using Qt 4.5.0 on a Mac and finding an oddity in printing.  If I  
set the paper size ahead of time, my printing is messed up.  Here is  
the example code:

     QPrinter printer(QPrinter::HighResolution);
     printer.setFullPage(true);
     printer.setMinMax(1, 1);

     // ** this line causes the problems **
     printer.setPaperSize(QSizeF(8.5, 11), QPrinter::Inch);

     if (!printer.setup(NULL)) return;

     QPainter p;
     p.begin(&printer);

     p.setWindow(0, 0, 5100, 6600);

     QColor color("black");
     p.fillRect(600, 600, 600, 600, color);
     p.fillRect(3900, 600, 600, 600, color);
     p.fillRect(600, 5400, 600, 600, color);
     p.fillRect(3900, 5400, 600, 600, color);

     p.end();
     return;

I would think that by setting the window of the painter to 5100x6600 I  
should always get 4 boxes in the corners of the printout back 1 inch  
that are 1x1 inches.  If I don't call the setPaperSize, then it  
works.  With the call to setPaperSize, I get a couple tiny little  
boxes in the bottom left corner of the page.

One thing I've noticed in testing is that if I don't set the paper  
size, the window and viewport default to 5100x6600 so that is likely  
why they work.  With the setPaperSize call, the window and viewport  
default to 589x769 but then I set the window to 5100x6600 so it should  
still work right?

While I'm at it, why the 589x769?  That seems to be the size in points  
(72 dpi) with some margins but I called the setFullPage(true) so why  
the margins?  I would perhaps understand it being 612x792 but not  
these values.  Perhaps there is some fixed order the methods need to  
be called in like using setPageSize after setFullPage?

--
Brad