https://bugs.kde.org/show_bug.cgi?id=430795

            Bug ID: 430795
           Summary: Scrolling diagonally down+left is impossible.
           Product: kate
           Version: 19.12.3
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: application
          Assignee: kwrite-bugs-n...@kde.org
          Reporter: cleit...@sfu.ca
  Target Milestone: ---

SUMMARY
When using trackpad, scrolling down and horizontally left (but no other
direction) at the same time (diagonally), the horizontal direction is reversed,
making it impossible to pan view down+left diagonally.

STEPS TO REPRODUCE
1. Open a text file with many lines to scroll across, and long lines that go
off side of window.
2. Ensure line wrapping is off.
3. Move 2 fingers on trackpad diagonally up and to right.

OBSERVED RESULT
Kate's view of the document moves down+right. Horizontal direction is reversed.
Actually scrolling down+right works as expected.

EXPECTED RESULT
Kate's view of the document should scroll down to left, with the text on the
screen moving the same direction as fingers on trackpad.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8

ADDITIONAL INFORMATION
The current workaround is to scroll only orthogonal directions in sequence,
this is not affected. Only diagonal scrolling down+left doesn't work.

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