[Qt6.7.0] Force light mode has incorrect rendering when system is dark mode

[Peiqi.Liu]

I update Qt from 6.6.1 to 6.7.0 via vcpkg, I sadly found that my program was automatically switched to dark mode, but I'm not ready to do this. So I forced Qt to switch to bright color mode:

qputenv("QT_QPA_PLATFORM", "windows:darkmode=0");

So, the interface has become like this:

The dropdown menu of QComboBox is very strange

Perhaps there are more rendering issues. Did I forget to set any options or miss something?

[Christian Ehrlicher]

You should try with windowsvista style instead the new windows11 style to see if it makes a difference.

[Peiqi.Liu]

@Christian-Ehrlicher Thank you. Done.

    qApp->setStyle("windowsvista");

Finally, Qt has added the Win11 style! However, it seems there are still some minor issues. It's really exciting to expect QWidget to have a more modern interface.

[Jero Bado]

I have the same issue and this code solved it!