[dolphin] [Bug 432671] New: Zooming does not work with high resolution scrolling (touchpads)

[Bernhard]

https://bugs.kde.org/show_bug.cgi?id=432671

            Bug ID: 432671
           Summary: Zooming does not work with high resolution scrolling
                    (touchpads)
           Product: dolphin
           Version: 20.12.2
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: micraft.b at gmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY
Zooming by CTRL+scrolling on a touchpad with granular scrolling only works if
you do it so fast you have almost no control over the outcome.

STEPS TO REPRODUCE
1. Have a touchpad with high resolution scrolling support (scroll delta < 120)
2. hold control key and scroll in any directory in dolphin
3. it does not respond at all when scrolling slowly, no matter how far you try
to go.

OBSERVED RESULT
When scrolling slowly it completely ignores that, no matter how far you
'scroll'. It only responds if you go so fast you're not able to stop at the
zoom level you want. 

EXPECTED RESULT
Zooming should work like everywhere else, eg firefox.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.14-arch1-1
OS Type: 64-bit
Processors: 8 × AMD Ryzen 7 4700U with Radeon Graphics
Memory: 15.1 GiB of RAM
Graphics Processor: AMD RENOIR

ADDITIONAL INFORMATION
Scrolling normally works find and is high res.

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