https://bugs.documentfoundation.org/show_bug.cgi?id=171181

            Bug ID: 171181
           Summary: Shift + Scroll Wheel (Horizontal Scroll) moves
                    inconsistently
           Product: LibreOffice
           Version: 24.2.7.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: [email protected]
          Reporter: [email protected]

Description:
When scrolling horizontally using Shift + Scrollwheel, the window does not
scroll consistently. For example, scrolling right one notch at a time, I
observe the horizontal scroll bar jumping right, then left, then right, then
left, meanwhile sometimes columns don't move.

Vertical scrolling appears to work consistently.

If I scroll horizontally, and then scroll one notch vertically, the horizontal
scroll bar jumps horizontally at the same time. (is it wound-up?).

Steps to Reproduce:
1. Open blank Calc worksheet
2. Press and hold shift key (left or right shift)
3. Scroll mousewheel down (to scroll right) in slow increments/notches

Actual Results:
The view of the worksheet scrolls right about every 1-2 notches of the scroll
wheel. Not consistently two notches, sometimes one. Moving from A column takes
three notches sometimes?
Scrollbar jumps right, and then left when the scrolling actually occurs (to the
point where it would have scrolled if the columns had scrolled as expected?). 

Expected Results:
For each scroll notch, the view of the worksheet to scroll right by one column,
and for the the horizontal scrollbar to move consistently in the direction
scrolled.


Reproducible: Always


User Profile Reset: Yes

Additional Info:
Version: 24.2.7.2 (X86_64) / LibreOffice Community
Build ID: 420(Build:2)
CPU threads: 4; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: en-CA (en_CA.UTF-8); UI: en-US
Ubuntu package version: 4:24.2.7-0ubuntu0.24.04.4
Calc: threaded

Attachments show scrolling in each direction four steps. Watch the scroll bars!
Comparison is to a browser-based spreadsheet.

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