QFileDialog on 4K screen

qtnebula

Hi,

The issue that I have is that on 4K screen native QFileDialog dialog looks tiny (despite 200% OS user scale setting)

Is it possible to make it aware of desktop 200% user scale setting ?

Alternatively, is it possible to apply stylesheet (to compensate the resolution) to QFileDialog instance but still keep it native ?

In my application I use the QT recommended approach:

Always use the qreal versions of the QPainter drawing API.
Size windows and dialogs in relation to the screen size.
Replace hard-coded sizes in layouts and drawing code by values calculated from font metrics or screen size.

I don't know what to do with QFileDialog though...

Thanks a lot!

mrjj

Hi
Did you try anything from ?
http://doc.qt.io/qt-5/highdpi.html

Also when you say native QFileDialog , do you mean
native to Qt. ( its version ) or native to the OS via the
Qt::DontUseNativeDialog flag ?

qtnebula

By native I mean OS file dialog (with all bells and whistles)

I have the following lines in my code:

setAttribute(Qt::AA_EnableHighDpiScaling);
setDesktopSettingsAware(true);

I tried other true/false combinations but without spotting any difference.
Also tried to open dialog passing null parent

mrjj

@qtnebula
So if you use another app, and open the FileDialog from that app
its also ultra small ?

qtnebula

Apparently I had to do sign out and sign in to apply windows user scale correctly to all applications.
After doing this everything look fine.