[Breeze] [Bug 416003] Scrollbar width in Breeze theme

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=416003

--- Comment #15 from Nate Graham <nate at kde.org> ---
I think the people here talking about a overly thin scrollbars in their *web
browser*--particularly if that web browser is Firefox--may be suffering from a
misconception. We are able to style Firefox's scrollbar via our Breeze-GTK
theme, but we are unable to make it any wider. So the best we can do is to make
the overly-thin 10px wide scrollbar in Firefox be a Breeze-styled overly thin
10px wide scrollbar. The scrollbar being ridiculously thin is a Firefox issue
and unfortunately we can't correct it in our styling.

In Qt apps, we don't have this problem because we have full control over the
scrollbar's visuals and sizing. So allow me to point out that the scrollbars in
Breeze-styled Qt apps are not actually narrow at all; the clickable area itself
is 44 pixels wide--over 4 times the thickness of Firefox's somewhat absurd
scrollbar--even if the bar itself is *visually* somewhat narrow. This
interactive click area is very generous--by design--and much more so than the
scrollbars you get in GTK apps or even on macOS these days.

And let me also repeat that if you are using a high-DPI screen and find the
Breeze scrollbars in Qt apps too small, this is because you haven't set the
display scaling properly and so everything else will be too small as well; once
you set the scale properly everything--including scrollbars--will appear at the
correct intended size. The use case of wanting only scrollbars to be huge but
nothing else isn't something we plan to support, as it breaks the intended size
relationships between objects.

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