From: martin rudalics <rudalics@gmx.at>
To: Stephen Berman <stephen.berman@gmx.net>
Cc: 18990@debbugs.gnu.org
Subject: bug#18990: 25.0.50; Scroll bar display problems
Date: Sat, 08 Nov 2014 18:00:43 +0100 [thread overview]
Message-ID: <545E4C3B.7010605@gmx.at> (raw)
In-Reply-To: <87d28xznjs.fsf@rosalinde.fritz.box>
> That possibility didn't occur to me. Is there some command I can call,
> or some other way to convince myself that this is what is happening (not
> that I don't believe you, I'd just like to understand it).
I suppose the window manager simply crops everything that doesn't fit
within its external borders. You should be able to convince yourself
for a single window frame by removing modeline and echo area and
decreasing the height of the horizontal scroll bar.
> And why does
> it happen on the right but not on the left (nor on the right side of a
> non-right window)?
It doesn't happen on the left or for non-right windows because in this
case the (default sized) scroll bar gets drawn into Emacs' client area
and the window manager assumes that Emacs knows how to deal with it.
> I meant Emacs can make it thinner, since it didn't occur to me that the
> appearance of the right scroll bar could be due to the WM.
We must discriminate: Emacs reserves the area as you specify it. Gtk
draws its slider into that area alas with a width determined by the
theme or a resource file.
> Indeed: with (modify-all-frames-parameters '((scroll-bar-width . 32)))
> the scroll bar
... more precisely, the slider ...
> still has the default width but there are nearly equally
> wide spaces on both sides of it (between the scroll and the fringe to
> the left and between the scroll bar and the frame border to the right).
> Ok, this convinces me that Emacs is not modifying the width.
... the width of the slider.
> As I mentioned, I can't simply build both the Lucid and the Gtk builds
> on my system, apparently due to incompatible libpng requirements.
Maybe Jan has an idea.
> Anyway, it seems that the appropriate fix for this bug it to make
> modifying the scroll-bar-width and scroll-bar-height frame parameters
> noops in Gtk builds.
Another problem is that currently we prescribe a minimum width for
scroll bars which has parts of the scroll bar background change
appearance when the Gtk slider is narrower.
martin
next prev parent reply other threads:[~2014-11-08 17:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-07 23:00 bug#18990: 25.0.50; Scroll bar display problems Stephen Berman
2014-11-08 7:54 ` Eli Zaretskii
2014-11-08 8:57 ` Jan D.
2014-11-08 14:26 ` Stephen Berman
2014-11-08 15:14 ` martin rudalics
2014-11-08 16:04 ` Stephen Berman
2014-11-08 17:00 ` martin rudalics [this message]
2014-11-08 17:21 ` Jan D.
2014-11-08 21:12 ` Stephen Berman
2014-11-08 21:12 ` Stephen Berman
2014-11-09 11:56 ` martin rudalics
2014-11-09 12:07 ` Jan D.
2014-11-08 8:54 ` martin rudalics
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