[okular] [Bug 421822] 'Scroll Page Up'/'Scroll Page Down' actions do not scroll by pages

[Éric Brunet]

https://bugs.kde.org/show_bug.cgi?id=421822

Éric Brunet <eric.brunet at lps.ens.fr> changed:

           What    |Removed                     |Added
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                 CC|                            |eric.brunet at lps.ens.fr

--- Comment #24 from Éric Brunet <eric.brunet at lps.ens.fr> ---
I think there's been a mix up between two different issues

a) the fact that Scroll Up/Scroll Down or Space moved the document by about one
line of text instead of nearly the full displayed height

b) the issues about smooth scrolling

The original description of the bug was about problem a), but in the comments
it drifted to problem b), and eventually the bug was marked as resolved and
duplicate of bug 422050. But this is for problem b)! 

Problem a) is not fixed, and I am reopening this bug.

My okular was working correctly in Fedora 32 (Version 19.something of okular, I
didn't make note of exact version). I upgraded to Fedora 33 (Version 20.08) and
ran into the problem described here. I then upgraded the okular package from
fedora rawhide (or 34) in the hope the problem was already fixed:

okular-20.12.2-2.fc34.x86_64

But it is not.

The bug seem related to scrollbars. I have set up okular so that scrollbars are
not set. Then:
1) I run okular on some pdf file. No scrollbar, of course, and the bug is
present: pressing the space key moves me down by about one line of text.
2) I go into the settings and I ask for the scrollbars to be displayed
3) The bug no longer shows! Pressing Space scrolls me down by nearly one height
of the displayed text.
4) I go back into the settings

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