Hi Thomas, Thanks for taking a look.
I have submitted a change request, which is currently at +1 status (thanks
Edward Wellborn) https://codereview.qt-project.org/#/c/158402/, and after a
few rounds we have this text:
The units are determined by the underlying paint device. The size is
measured in logical pixels when painting to the screen, and in points
(1/72 inch) when painting to a printer.
I tried to add you as a reviewer, but didn’t find you in the system. Feel
free to add yourself as a reviewer, or comment there.
I
Steve Schilz
PASCO scientific - think science
On 6/7/16, 7:04 AM, "Development on behalf of
[email protected]"
<[email protected] on behalf of
[email protected]> wrote:
>Message: 4
>Date: Tue, 7 Jun 2016 10:26:27 +0200
>From: Thomas Krenn <[email protected]>
>To: [email protected]
>Subject: [Development] Documentation for
> QPagedPrintDevice::setPageSize should specify a unit
>Message-ID: <[email protected]>
>Content-Type: text/plain; charset="utf-8"; Format="flowed"
>
>Hello,
>Steve Schilz requested on Wed, 4 May 2016:
>
>QPagedPrintDevice::setPageSize should specify a unit
>QTextDocument::setPageSize
>(http://doc.qt.io/qt-5/qtextdocument.html#pageSize-prop)
>
>---
>
>Looking at the source code and the generated PDF's my conclusion is
>is that the numbers of the property pageSize dependent on the platform
>because all internal calculations of QTextDocument are done with:
>'qt_defaultDpi'
>
>Notably on Windows (qt_defaultDpi = 96 dpi) the produced PDF is to small
>with a pageSize e.g.:
>
>fullRectPoints 595 / 842 (595,44) / (841,62) (72 dpi / A4)
>and a PDF printer with:
>
> QString pdfName("hello.pdf")
> QPrinter printer(QPrinter::HighResolution);
> printer.setOutputFormat(QPrinter::PdfFormat);
> printer.setOutputFileName(pdfName);
>
> printer.setResolution(1200);
> QPageSize pageSizeA(QPageSize::A4);
> printer.setPageSize(pageSizeA);
>
>// setting the printer margin to 0 (or full page mode) is important to avoid
>PDF page scaling.
> QMarginsF margins(0, 0, 0, 0);
> printer.setPageMargins(margins);
>
>
>Best regards
>Thomas Krenn
>
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