Bug#940815: zathura: Mouse wheel zoom inconsistent with girara >= 0.3.3

[Sebastian Ramacher]

Control: forwarded -1 https://git.pwmt.org/pwmt/zathura/issues/114
Control: tags -1 + upstream fixed-upstream

On 2019-09-20 09:43:57, Jakob Haufe wrote:
> Package: zathura
> Version: 0.4.4-1
> Severity: normal
> 
> With girara 0.3.3 enabling smooth-scroll reporting by default, mouse wheel
> zooming in zathura became inconsistent for me (in comparison to
> keyboard zooming).
> 
> The first issue is the zooming direction being inverted, the other is
> the zoom level jumping to minimum when going below 1.0.

This issue was fixed upstream.

Cheers

> 
> On my system, event.y is either -1 or +1.
> 
> Please see the following table for resulting zoom values (calculated
> manually given zoom-step==10).
> 
> old_zoom  ZOOM_IN  ZOOM_OUT  SMOOTH -1  SMOOTH +1
> 0,1       0,11     0,09      -1         1,2
> 0,2       0,22     0,18      -0,9       1,3
> 0,3       0,33     0,27      -0,8       1,4
> 0,4       0,44     0,36      -0,7       1,5
> 0,5       0,55     0,45      -0,6       1,6
> 0,6       0,66     0,55      -0,5       1,7
> 0,7       0,77     0,64      -0,4       1,8
> 0,8       0,88     0,73      -0,3       1,9
> 0,9       0,99     0,82      -0,2       2
> 1         1,1      0,91      -0,1       2,1
> 1,1       1,21     1         0          2,2
> 1,2       1,32     1,09      0,1        2,3
> 1,3       1,43     1,18      0,2        2,4
> 1,4       1,54     1,27      0,3        2,5
> 1,5       1,65     1,36      0,4        2,6
> 1,6       1,76     1,45      0,5        2,7
> 1,7       1,87     1,55      0,6        2,8
> 1,8       1,98     1,64      0,7        2,9
> 1,9       2,09     1,73      0,8        3
> 2         2,2      1,82      0,9        3,1
> 2,1       2,31     1,91      1          3,2
> 2,2       2,42     2         1,1        3,3
> 2,3       2,53     2,09      1,2        3,4
> 2,4       2,64     2,18      1,3        3,5
> 2,5       2,75     2,27      1,4        3,6
> 2,6       2,86     2,36      1,5        3,7
> 2,7       2,97     2,45      1,6        3,8
> 2,8       3,08     2,55      1,7        3,9
> 2,9       3,19     2,64      1,8        4
> 3         3,3      2,73      1,9        4,1
> 
> Downgrading to libgirara-gtk3-3=0.3.3-1 and zathura=0.4.3-1 (from
> buster) hides the problem, but even those versions can show it when
> setting smooth-scroll to true in zathurarc.
> 
> -- System Information:
> Debian Release: bullseye/sid
>   APT prefers testing
>   APT policy: (990, 'testing'), (500, 'testing-debug'), (500, 
> 'stable-debug'), (500, 'unstable'), (500, 'stable'), (1, 
> 'experimental-debug'), (1, 'experimental')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 5.2.0-2-amd64 (SMP w/2 CPU cores)
> Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, 
> TAINT_UNSIGNED_MODULE
> Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), 
> LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
> 
> Versions of packages zathura depends on:
> ii  libc6                2.29-1
> ii  libcairo2            1.16.0-4
> ii  libgirara-gtk3-3     0.3.3-1
> ii  libglib2.0-0         2.60.6-2
> ii  libgtk-3-0           3.24.11-1
> ii  libmagic1            1:5.37-5
> ii  libpango-1.0-0       1.42.4-7
> ii  libseccomp2          2.4.1-2
> ii  libsqlite3-0         3.29.0-2
> ii  libsynctex2          2019.20190605.51237-2
> ii  zathura-pdf-poppler  0.2.9-1
> 
> zathura recommends no packages.
> 
> Versions of packages zathura suggests:
> ii  dillo [www-browser]    3.0.5-5+b1
> ii  firefox [www-browser]  69.0-1
> ii  links [www-browser]    2.20.1-1
> ii  lynx [www-browser]     2.9.0dev.4-1
> ii  w3m [www-browser]      0.5.3-37+b1
> ii  zathura-cb             0.1.8-2
> ii  zathura-djvu           0.2.8-1
> ii  zathura-ps             0.2.6-1
> 
> -- no debconf information



-- 
Sebastian Ramacher

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