[okular] [Bug 436742] New: Involuntary scrolling when annotations encounter edge of page

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https://bugs.kde.org/show_bug.cgi?id=436742

            Bug ID: 436742
           Summary: Involuntary scrolling when annotations encounter edge
                    of page
           Product: okular
           Version: 20.12.3
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: pbs3141 at googlemail.com
  Target Milestone: ---

SUMMARY

When the user hits the edge of the page while drawing an annotation, or
attempts to drag an annotation off the edge of the page, the page scrolls up or
down.

STEPS TO REPRODUCE

Open a pdf document with many pages, and scroll to a page somewhere about the
middle. Then either

1. Draw an annotation so that part of it would go off the edge of the page.
2. Attempt to drag an existing annotation off the page.

OBSERVED RESULT

Depending on the type of annotation, which edge was hit, and sometimes even
which edge was hit first, the following can happen:

1. After drawing the annotation, the page scrolls upwards or downwards a small
amount.
2. While dragging the annotation, the page continuously scrolls up or down.

EXPECTED RESULT

Scrolling should only occur if the edge of the viewport are hit, and be limited
to the current page.

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