[Okular-devel] [okular] [Bug 341583] New: Scrolling by middle-clicking does not trigger a proper redraw

[Ralf Jung]

https://bugs.kde.org/show_bug.cgi?id=341583

            Bug ID: 341583
           Summary: Scrolling by middle-clicking does not trigger a proper
                    redraw
           Product: okular
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: post at ralfj.de

When I scroll in Okular by middle-cllicking the scroll bar, the document is not
drawn properly.

Reproducible: Always

Steps to Reproduce:
1. Open a long (>40 pages) document
2. Click the scroll-bar with the middle mouse button to scroll to some part of
the document that has not been shown since the document has been opened

Actual Results:  
The page renders blank or with a very low-resolution, large-pixel "preview" of
the actual content.

Expected Results:  
The page should look as it does when scrolling to this place by, for example,
using the scroll wheel or the arrow keys.

I set "memory usage" to "aggressive". But the issue also happens with "normal".

This is a regression, things used to work fine until some weeks ago. That could
correlate with the update from 4.14.1-1 to 4.14.2-2 in early November (these
are Debian package version numbers).

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