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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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QT Theme management in Sway (mander.xyz)

submitted 4 months ago by jaagruk@mander.xyz to c/linux@lemmy.ml

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I use VLC,Keepass,Kdenlive and few other QT Apps on my sway setup. So, wanted to configure their themes from Sway. I installed qt5ct and qt6ct and did export QT_QPA_PLATFORMTHEME=qt5ct in bashrc and .profile. While runnin echo $QT_QPA_PLATFORMTHEME it is showing qt5ct but it is not working showing that error message that QT_QPA_PLATFORMTHEME need to be set as qt5ct or qt6ct when launching from .desktop But when launching from terminal they start and function properly but do not change any theming.

qt5ct-error

from-terminal error

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[–] yardy_sardley@lemmy.ca 8 points 4 months ago

A really common issue with sway is that it doesn't run as a login shell, so none of your .profile or other environment settings get sourced when you login. I think that might be the problem here.

Try closing your sway session, then login to a tty and run sway. If the qt themes work properly then it's definitely an environment issue.

[–] exu@feditown.com 2 points 4 months ago

In my experience setting environment variables is pretty inconsistent. The easiest way would be using /etc/environment. This sets stuff globally for all users and definitely works.

PAM also used to support a per-user environment file, but that's deprecated or removed even. The best you can do for per-user config is setting variables both in your login shell and the systemd user environments file.

[–] Communist@lemmy.ml 2 points 4 months ago

Test setting it in /etc/environment

[–] Static_Rocket@lemmy.world 1 points 4 months ago* (last edited 4 months ago)

Depending on the launcher and launch method you may need to set systemd variables. Look at the way 50-systemd-user.conf works https://wiki.archlinux.org/title/Sway#Configuration

I use the following fragment to make sure the cursor theme propagates to applications launched with wofi: https://github.com/StaticRocket/dotfiles/blob/main/dot_config/sway/systemd-user.conf