[Interest] How to detect a HiDPI display with Qt?

Vadim Peretokin vperetokin at gmail.com
Mon Mar 18 17:59:36 CET 2019

I'm not clear on how to detect if a display is HiDPI with Qt. I've tried
QApplication.desktop()->screen()->devicePixelRatio() but even that returns
1 for a display that is 3840x2160.

Has anyone got hints on how to do this successfully?
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