[QGIS-Developer] PR Review Request for Layout Scalebar Data Overrides

[Ethan Snyder]

Hello Devs:

        I worked on adding data defined overrides to the layout scalebar item, and has passed all the checks and is now waiting review.

        This feature is something that I'm missing when I make map books (which I do a lot) when the atlas layer is not a regular grid (which is more often than not), and I need the scalebar fixed segment size to be very particular based off the map scale. When implementing this, I decided to add overrides for not just the single field that I needed, but the other probably common items including the number of segments to the left and right, the fixed width of a single segment (which is what I needed), and the min/max segment size settings.

        https://github.com/qgis/QGIS/pull/48314

        I look forward to working more with the QGIS code base and adding more features.
        This is only the beginning.

Thank you for your time,

Ethan Snyder
GIS/GPS Technician
Remington & Vernick Engineers, Inc.
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