[Development] Qt, COSMIC and Server Side Decorations

[Igor Khanin]

Thanks David!

On 04/10/2025 19:16, David Edmundson wrote:
>> And quite poorly at that - both the bradient and Adwaita decorations suffer from dialog clipping.
>>
>> Please file a bug as that presumably needs fixing for Gnome regardless.

I filed https://bugreports.qt.io/browse/QTBUG-140847. It behaves 
differently than as described in the similar existing ticket about 
GNOME; so may or may not be the same issue. Or may not even be a Qt 
issue (though less likely based on rudimentary initial investigation).

>> Basically what I am asking is if anyone is aware of any downside to
>> changing the xdg-shell plugin to stating in the negotiation that it
>> prefers server side decorations (for non-frameless top-level windows of
>> course) by invoking zxdg_toplevel_decoration_v1::set_mode instead of
>> unset_mode.
> I don't think there would be a practical downside, things would only
> change on Cosmic.
> It would have to be Qt 6.11 material.

Do you think that adding some control of the platform theme (via a new 
theme hint perhaps) over this makes sense, or would it be an overkill?

> David

Best,
Igor