QPrinter does not match documentation

[hugh_lou]

10 "pixels" at 300, 600, or 1200 dots per inch (i.e. typical printer resolution) is less than a millimetre from the page edges: your pageRect() and paperRect() are very similar. That position is probably comparable to the tolerance of paper positioning in the printer, and less than the typical non-printable margin on a printer.

You are right. I just misunderstood the conception "page margin".
The QPrinter::setPageMargin function gave me a illusion that the entire paper is drawable.

Thanks for your reply.

[ChrisW67]

All printing occurs inside the page rect, which is offset from the paper edges by the margins you set. The entire paper area is addressable if you set pageRect == paperRect by setting the margins to zero or setFullPage(true). Your margins, while not zero, were so small that the page rect would barely be visibly different from the paper rect.

What is actually printed is constrained by the printer's non-printable areas, typically a couple of millimetres all around but variable by printer: this is not considered by Qt at all.

There's also a bug regarding setFullPage() on Windows: QTBUG-5363