[okular] [Bug 375220] New: mouse wheel scrolling broken after update to 16.12

[Jiri Slaby]

https://bugs.kde.org/show_bug.cgi?id=375220

            Bug ID: 375220
           Summary: mouse wheel scrolling broken after update to 16.12
           Product: okular
           Version: unspecified
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: jirislaby at gmail.com
  Target Milestone: ---

After recent update, perhaps to okular 16.12 (it may be 16.04 or 16.08, only I
haven't noticed yet), scrolling by mouse wheel is broken. I very suspect this
to be a genuine Qt5 bug.

What I do:
* click somewhere in the PDF document
* scroll down by wheel
* click somewhere in the PDF document again
* scroll down by wheel again

What happens is that the second scroll starts exactly where the first started.
So it actually jumps to the position as if the first scroll never happened and
starts scrolling from there on.

I actually need not to click anywhere in the document. It is enough to switch
to another window and continue scrolling in the PDF document -- it always jumps
back.

okular update activity: 
2015-10-19
08:56:31|install|okular|15.08.1-1.1|x86_64||repo-oss|dfb3cd4078a7ee603649922dd7e1227ddb01eacd|
2015-10-28
09:38:56|install|okular|15.08.2-1.1|x86_64||repo-oss|677b4ae12073bcb1f148ff088fb3abb927f59950|
2015-11-22
17:44:31|install|okular|15.08.3-1.1|x86_64||repo-oss|841eea27c9382abdc43659103694e0d9ba325c94|
2016-01-27
10:44:25|install|okular|15.12.0-1.2|x86_64||repo-oss|2e13d9db644338fe2ad135506ae8d4b04599d927|
2016-02-11
08:57:06|install|okular|15.12.1-1.1|x86_64||repo-oss|3b3969fc66e4d06539a63991a0ba54676af57947|
2016-03-14
15:02:26|install|okular|15.12.2-1.1|x86_64||repo-oss|3ff3ef063d6f55088a99cff21f0cefb50dad71a0|
2016-04-09
16:41:59|install|okular|15.12.3-1.1|x86_64||repo-oss|1e335bb1ec55cb8c53629898ded236c27eac3663|
2016-05-11
17:49:56|install|okular|15.12.3-1.2|x86_64||repo-oss|d0d2dc86a294337b47794b7d0f71b4602e5bc8d0|
2016-06-08
07:30:59|install|okular|16.04.1-1.1|x86_64||repo-oss|d07dbfe284c2954c17902400cb278d0229fd77f0|
2016-06-27
11:35:19|install|okular|16.04.2-1.2|x86_64||repo-oss|aa7679343a8c0494adbeae8d4aadb060390a6588|
2016-07-25
15:21:05|install|okular|16.04.2-2.1|x86_64||repo-oss|954abaa8ebbf3b7f2d897511cb5e0ab0cb2f7488|
2016-07-29
10:58:37|install|okular|16.04.3-1.1|x86_64||repo-oss|ac9ab429ef5acebc044fdd97dfd2011561d5b25e|
2016-09-07
19:29:29|install|okular|16.08.0-1.2|x86_64||repo-oss|373d93459f554c170b3f8805f1764a6d92132995|
2016-10-05
14:17:36|install|okular|16.08.1-1.1|x86_64||repo-oss|df595a3fd03a27dfaaa4110b1a38f3dabd5b9e76|
2016-11-07
12:20:45|install|okular|16.08.2-1.1|x86_64||repo-oss|1e767632c1d5007ab1d1f3cb5a53818f41d45528|
2016-12-01
21:26:46|install|okular|16.08.3-1.1|x86_64||repo-oss|a5b02bbe269fc86c2c90f816ce44e7f26cdbf982|
2017-01-05
08:28:09|install|okular|16.12.0-1.1|x86_64||repo-oss|7c8083cceb312244c96320ce1f7373da698db0dd|

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