Start QT5 application in high DPI mode in GnomeShell

if hash gsettings 2>/dev/null; then
        scalingFactor="$(gsettings get org.gnome.settings-daemon.plugins.xsettings overrides)"
        if $(echo "${scalingFactor}" | grep -q "{'Gdk/WindowScalingFactor': <2>}"); then
                export QT_DEVICE_PIXEL_RATIO=2
        fi
fi