Support flexible x-axis for bars in BarChart

[Xiao-Chenguang]

Related

• Part of Enhance Support for Custom Axes and 2D Plotting #7346
• Part of Introducing ScalarChart in place of BarChart? #5622
• Part of view_coordinates for 2D views #1387

What

Support customise x-axis (index) for BarChart

This draft PR include changes that enable index customization of BarChart.
The index of BarChart has to be 0-indexed continus intagers originally, while a lot of use case require a customized index as in related issues.

This PR include changes to both the BarChart data type as view system. As rerun use BarChart from egui_plot where index is supported, an extra field indexes is add to rerun.BarChart.

[github-actions]

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[grtlr]

Thank you for your contribution! What's the status of your work, do you plan on finishing this up or is it ready for review yet?

[Xiao-Chenguang]

Thank you for your contribution! What's the status of your work, do you plan on finishing this up or is it ready for review yet?

Hi grtlr, It's my first PR to rerun. So I make it a draft PR as requested. It's ready for review now except the failed RP label check.

[grtlr]

Thank you for the clarification! We'll put it onto our review queue!

[Wumpf]

thanks for your contribution! I think with some iteration on naming and documentation we can take this as-is :)

Please add an additional snippet, similar to docs/snippets/all/archetypes/tensor_simple.py/cpp/rs demonstrating the new feature. Thank you!

[Wumpf]

looks all good now, thanks again!

I've updated screenshot, updated version comparision rrd and fixed up the C++ snippet. Good to merge on green ci

[Wumpf]

interesting, the image comparision test found that this actually breaks layout a bit

before:

after:

[Wumpf]

@Xiao-Chenguang maybe you want to have a last look before merging given that I messed with it so much now :)

[Xiao-Chenguang]

@Xiao-Chenguang maybe you want to have a last look before merging given that I messed with it so much now :)

it looks good now. let's go ahead