[Okular-devel] [Bug 205496] New: Okular's "Advance to the next page" jumps to middle of next page

[Nicolas Bigaouette]

https://bugs.kde.org/show_bug.cgi?id=205496

           Summary: Okular's "Advance to the next page" jumps to middle of
                    next page
           Product: okular
           Version: 0.9
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: okular-devel at kde.org
        ReportedBy: nbigaouette at gmail.com


Version:           0.9 (using KDE 4.3.0)
Compiler:          gcc version 4.4.1 (GCC) ./configure --prefix=/usr
--enable-shared --enable-languages=c,c++,fortran,objc,obj-c++
--enable-threads=posix --mandir=/usr/share/man --infodir=/usr/share/info
--enable-__cxa_atexit --disable-multilib --libdir=/usr/lib
--libexecdir=/usr/lib --enable-clocale=gnu --disable-libstdcxx-pch
--with-tune=generic
OS:                Linux
Installed from:    Unspecified Linux

When clicking on "Advance to the next page" button on the toolbar or pressing
the keyboard shortcut to go to the next page, okular does not jump to the top
of the next page. It rather shows the half-bottom of a page and the half-top of
the next one. I think the "half-bottom page" is the page showing when the
action was taken. An example is attached[1].

This happens ~1/8 tries when in "Single Page" mode and ~1/12 in "Facing Pages"
mode.

Once it happens, going to next page will _always_ do show the same effect of
half-bottom previous page + half-top of next one. To correct this, I need to go
to the previous page which then shows the top of the previous page. I can then
go to next page which will show the top of the next page.

In Facing Pages mode, when the bad behavious happen, going to next page will
correctly go to the top of the next page. But going to the next page will show
again the bad behaviour. The bad and good behaviours alternate until I go back
to the previous page, "reseting" the bad behaviour.

Going to the previous page _never_ gives a bad behaviour.

[1] http://nbigaouette.inrs-emt.homelinux.net/linux/kde/okular.png

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