I’m absolutely sure that Qt determines DPI wrong. I’ve received from Qt that my screen has 72 DpiY, where actually it has 130.
So my question is what can I use else then QDesktopIWidget::physicalDpiY()? I need cross-platform solution of finding average finger size (it’s somewhere 10 mm)... From: Andre Somers Sent: Sunday, February 23, 2014 1:30 PM To: interest@qt-project.org Subject: Re: [Interest] DPI igor.mironc...@gmail.com schreef op 23-2-2014 13:24: Hi. I want to determine how much pixels in 10 mm. I use the next calculations: static const qreal fingerSize = 0.0393700787 * 10; static const qreal h = (qreal) QApplication::desktop()->physicalDpiY() * fingerSize; And this calculations return to me 28 that on my desktop is 5 mm only. 0.0393700787 is how much inches in millimeter... What am I doing wrong? Are you sure that the right physicalDpi is returned? That is not a value you can absolutely rely on. André -------------------------------------------------------------------------------- _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
_______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
