UI element spacing on Fedora xfce

[Glimmer868]

The UI buttons on Fedora look too big and spaced out in xfce -

But look fine on Debian -

Doesn't seem to be a version issue as 2.7.9 AppImage also behaves itself in Debian.

DPI scaling doesn't really seem to help because although the size of the application does shrink, the proportions of those buttons at the top stay the same and it is those buttons (as well as all other UI elements) which is wrong.

Just wondering if anyone has any ideas. Thanks.

[droidmonkey]

You might have some Qt environment variables setup in the XFCE environment. If not, maybe anything Deepin installed? That has been known to screw things up. Otherwise it may be Qt5CT, but unlikely since you are not using classic theme.

This kind of looks like QT_SCALE_FACTOR env var, but the menu height is really odd

[Glimmer868]

Putting it back to classic theme (platform native) seems to "fix" the problem in that the menus all look much better with normal spacing. Not sure if that helps point towards the problem with the non-classic UI?

[Glimmer868]

Also in case it is helpful (sorry I am learning as I go here) qt5ct doesn't actually seem to be installed on the "working" Debian OS even though QT_QPA_PLATFORMTHEME is still set to qt5ct. qt5ct is installed and usable on the "broken" Fedora OS.

[Glimmer868]

Final update. Sorry for the spam.

Working OS - $QT_QPA_PLATFORMTHEME set to qt5ct but qt5ct directory missing from ~/.config. qt5ct package not installed.

"Not working" OS - $QT_QPA_PLATFORMTHEME set to qt5ct and qt5ct package installed. qt5ct directory present in ~/.config.

Running "QT_QPA_PLATFORMTHEME= keepassxc" on not working OS results in a much better looking GUI within Keepassxc. So I guess this seems to be caused by the themes set by qt5ct and by disabling them the issue somewhat goes away.

[droidmonkey]

You can just leave the platform theme env var blank, there is no such theme as keepassxc. But as I thought this was qt5ct

[Glimmer868]

Appreciate the support @droidmonkey and for pointing me in the right direction.

[Glimmer868]

Keepassxc GUI looks strange on Qubes fedora-40-xfce template but looks fine on debian-12-xfce template. Buttons and some other GUI elements are too big. May or may not only be an issue with 4k monitors.

Turns out this is caused by qt5ct themes on fedora. Debian template has far fewer qt packages installed.

Solution -

Either remove qt5ct package from fedora template or set "QT_QPA_PLATFORMTHEME=" (blank) prior to running keepassxc.

Note that this results in some warnings being generated to the console afterwards such as -

(keepassxc:1214): Gtk-WARNING **: 14:24:06.944: Theme parsing error: :1:0: Expected a valid selector

So open to suggestions for a better solution.

[droidmonkey]

try setting the platformtheme to xcb to resolve the warning

[Glimmer868]

Thanks, but no effect.