this post was submitted on 04 Sep 2023
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Flatpak GTK apps not follwing the chosen GTK theme. (lemm.ee)
submitted 1 year ago by josephsh5@lemm.ee to c/linux@lemmy.ml
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Hello. I'm using Debian testing with KDE Plasma 5.27. I'm experiencing a problem where GTK Flatpaks are not following the chosen GTK theme despite giving them permissions to access .themes and .icons folders found in the home directory. I tried the running the following commands in the terminal:

flatpak override --filesystem=xdg-config/gtk-4.0:ro flatpak override --filesystem=xdg-config/gtk-3.0:ro

I even tried to specify a certain GTK theme to be chosen, that resulted in the flatpak changing to an ugly white-adwaita theme. I should note that this is happening exclusively with GTK Flatpaks, QT Flatpaks and GTK deb packages don't seem to have this problem. What am I missing here? Any help would be appreciated.

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[–] pH3ra@lemmy.ml 12 points 1 year ago (1 children)

In this video explains everything you should know about flatpak theming.
As others said, you probably haven't installed the chosen theme yet.

[–] PipedLinkBot@feddit.rocks 10 points 1 year ago

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[–] mitram2@lemm.ee 9 points 1 year ago (1 children)

Have you installed xdg-desktop-portal-gtk?

[–] josephsh5@lemm.ee 1 points 1 year ago

xdg-desktop-portal-gtk?

Yes, it's already installed.

[–] med@sh.itjust.works 1 points 1 year ago (1 children)

Is it being forced to look for a theme installed via flatpak maybe?

[–] josephsh5@lemm.ee 2 points 1 year ago (1 children)

How do I know that exactly?

[–] med@sh.itjust.works 2 points 1 year ago

Apparently there has been a problem with gtk4 apps and theming in flatpak, only supporting adwaita light and dark - only found vague reference to it though, nothing concrete.

Try

flatpak-metadata sockets

To see if you can find the GTK_THEME environment variable.

You’ve given it permission to access the themes folder, now you need go point it at the themes

sudo flatpak override --env=GTK_THEME=my-theme 
sudo flatpak override --env=ICON_THEME=my-icon-theme

Where my-theme is the theme name, e.g. Adwaita-dark

Apparently the flatseal gui has some functionality to set the theme too! Will check it out tomorrow to see what’s up.

[–] furzegulo@lemmy.dbzer0.com 0 points 1 year ago (1 children)

try this https://bugsfiles.kde.org/attachment.cgi?id=135846

[–] furzegulo@lemmy.dbzer0.com 5 points 1 year ago* (last edited 1 year ago) (1 children)

here's the same as text

sudo apt install xdg-desktop-portal-gtk

systemctl --user edit xdg-desktop-portal.service

  1. paste these two lines
[Service]

Environment="XDG_CURRENT_DESKTOP=sway"

systemctl --user restart xdg-desktop-portal.service

[–] josephsh5@lemm.ee 2 points 1 year ago

This also refused to work unfortunately.