[dolphin] [Bug 486666] New: Incorrect zooming when pressing CTRL+MOUSE_WHEEL_DOWN for the first time after start

[Roman Golubev]

https://bugs.kde.org/show_bug.cgi?id=486666

            Bug ID: 486666
           Summary: Incorrect zooming when pressing CTRL+MOUSE_WHEEL_DOWN
                    for the first time after start
    Classification: Applications
           Product: dolphin
           Version: 23.08.5
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: dr64.00 at mail.ru
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
When you start Dolphin and press CTRL+MOUSE_WHEEL_DOWN for the first time, the
zoom increases, not decreases. While continuing to hold CTRL, the same thing
happens when you try to scroll the wheel up (zoom in). But if you release CTRL
and try again, then everything works as it should.

The bug repeats every time Dolphin is launched and the first time
CTRL+MOUSE_WHEEL is used, it does not matter where to start, from scrolling up
or down.

STEPS TO REPRODUCE
1. Start Dolphin.
2. Press CTRL.
3. Try to scroll the mouse wheel up or down.

OBSERVED RESULT
There is only a zoom in, instead of a zoom out. (on the first attempt)

EXPECTED RESULT
Zoom in when scrolling the mouse wheel up and zoom out when scrolling the mouse
wheel down.

SOFTWARE/OS VERSIONS
Operating System: Void 
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.11

ADDITIONAL INFORMATION
The keyboard shortcuts CTRL+PLUS_KEY and CTRL+MINUS_KEY work as expected.

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