Kwin Maintainers Approval for Rounding Bottom Corners

[Niccolò Venerandi of KDE]

The main issue I see with that approach (this is my opinion personally) is
that it risks to bring some of the issues with CSD: most KDE applications
would probably implement it, most third party apps (Firefox, Inkscape,
Libreoffice) wouldn't (thus creating an inconsistency with our
applications), some third party applications close to KDE would maybe go
for it but maybe they want more rounding than 3px (creating even more
inconsistency). At the end, there would be various windows with all
different corner radius and we would not be able to guarantee a consistent
window shape.
By implementing this in kwin, we make sure that all windows the user will
interact with will have rounded corners for a consistent look. We also
potentially allow in the future to consistently change the corner radius or
let the user choose it - if each application draws its own transparent
corners, that's going to be hard to achieve (considering third parties).

Il giorno sab 26 giu 2021 alle ore 00:25 Aleix Pol <aleixpol at kde.org> ha
scritto:

> Are you sure this is something that needs tackling at KWin level? if KWin
> cuts down there's the possibility that an app might get cut off. An
> application (e
> g. at kirigami level) could decide though to have round corners by
> offering a transparent mask. Would that be more in line with what you are
> after?
>
> El dv., 25 de juny 2021, 23:17, Niccolò Venerandi of KDE <
> niccolo.venerandi at kde.org> va escriure:
>
>> Hi,
>> I'd like to ask approval for a patch rounding the bottom corner of the
>> windows by a fixed size of 3 pixels. I'm not the one working out the
>> technical details, but one possibility is to create a kwin effect to do
>> that, that the user would be able to disable.
>> I understand that there's skepticism regarding this proposal in kwin, but
>> this is something that's very important for the VDG. I've done a quick
>> informal poll and there's a wide consensus that this is the right path
>> forward (something like 20 people for it and 4 people against); and the
>> most proficient VDG members and designers are strongly for it (I'm thinking
>> Nate, Manuel, Pontaoski, ...), with pretty much all of our design style
>> mockups featuring them.
>> In the Breeze Redesign phabricator task we also had some first
>> contributors tune in and give their positive feedback about it (I'm
>> thinking abstractdevelop, michaldybczak, ...). There are also many feature
>> requests for this in the forums I moderate, like r/kde (1
>> <https://www.reddit.com/r/kde/comments/jairyp/suggestion_window_corner_radius_consistency/>
>> 2
>> <https://www.reddit.com/r/kde/comments/g1mlig/a_bunch_of_suggestions_and_feedback_part_2/>
>> 3
>> <https://www.reddit.com/r/kde/comments/fdad38/best_method_for_rounded_corners/>
>> 4
>> <https://www.reddit.com/r/unixporn/comments/7ycmrj/kde_rounded_corners/>)
>> and others (1
>> <https://askubuntu.com/questions/1228507/is-it-possible-to-have-rounded-window-corners-in-kubuntu-18-04>
>> 2
>> <https://www.kubuntuforums.net/showthread.php/71905-Crop-bottom-corners-of-the-window-to-make-rounded-rectangle>
>> and I could go on).
>> I'll add that I understand the principle argument against this of window
>> manager not having rights to interfere with windows; but as many have
>> pointed out in the VDG chat, it's extremely unlikely that removing 5/6
>> pixels in the corner will impact the user experience of any application, as
>> it's too little space to put controls in there and it's barely noticeable
>> when consuming content. The issue is thus purely theoretical, but in
>> practise it rarely (or never) arises.
>> Given the above, I'd please ask you to consider this VDG request and
>> allow us to add such effect by default, but with the option of being turned
>> off by the user.
>> Niccolò
>>
>
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