[trixie] Qt configuration harmony

Head_on_a_Stick · 2025-04-20 16:07:13

Under Debian bookworm maintaining theme harmony for both Qt and GTK applications is done by installing the qt5-gtk2-platformtheme package and exporting QT_QPA_PLATFORMTHEME=gtk2, which causes Qt to use the configured GTK2 theme for the window components.

For the upcoming trixie release the qt5-gtk2-platformtheme package has been removed so that method can't be used going forward.

Debian provides the qt5-gtk-platformtheme & qt6-gtk-platformtheme packages to cover this gap, with the relevant variable now being QT_QPA_PLATFORMTHEME=gtk3. This seems to work, at least as far as font configuration is concerned, but the theme range appears limited to the default Adwaita-style setting, which is unfortunate.

Anyway, I thought it best to start a new thread here rather than continue to hijack https://forums.bunsenlabs.org/viewtopic.php?id=9322 :-)

johnraff · 2025-04-21 05:54:31

Sounds like a good idea.

BTW do you know if qt6gtk2 is still worth thinking about?

Head_on_a_Stick · 2025-04-21 09:49:27

The qt6gtk2 package has been rendered obsolete by qt6-gtk-platformtheme and the move to GTK3, I think.

Stuff seems to work just fine with the qt{5,6}-gtk-platformtheme packages as long as the correct environmental variable is applied. It's a bit strange though because the package description for qt5-gtk2-platformtheme mentions QT_QPA_PLATFORMTHEME but the qt{5,6}-gtk-platformtheme descriptions do not

johnraff · 2025-04-22 01:06:02

Thanks. That simplifies our options a bit.

It's a pity theme syncing will be restricted to fonts, but OTOH I guess there won't be all that many QT apps in default BL.

#1 2025-04-20 16:07:13

[trixie] Qt configuration harmony

#2 2025-04-21 05:54:31

Re: [trixie] Qt configuration harmony

#3 2025-04-21 09:49:27

Re: [trixie] Qt configuration harmony

#4 2025-04-22 01:06:02

Re: [trixie] Qt configuration harmony

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