Get screen diagonal size in Qt

Question

Is there any way to get size of diagonal of the screen (in inches) in Qt? I need it to calculate how big is my pixel. Or maybe I can get pixel size directly?

Answer 1

In order to get screen size, you can use QScreen::physicalSize.

Also, you can get the number of pixels per inch, by using QScreen::physicalDotsPerInch

QScreen *screen = qApp->screens().at(0);
qDebug() << screen->geometry() << screen->physicalSize() << screen->physicalDotsPerInch();