feat(Line) Allow pointLabel AccessorFunc to return the full point info

[Binb1]

General request

Hi,

I noticed that the label property of the @bar chart allowed to get the full point info (id, value, ...).
It seems that the AccessorFunc of the @line chart only pass down the data.

I think that enhancing this function to support the full Point type would allow a better customisation at the data point level.

My proposition is to add the point: Point directly to the function in order to avoid any breaking changes, but if you think that updating the datum: Point['data'] to datum: Point is more suitable, I can update my PR to match this quickly.

Case details

I'm requesting this change because in my case I need to format the value at a data point level.
Technically, every data point could have a different formatting in my charts, and without getting the id behind the value (contained in the Point but not the Point['data']), I have no way to know which value is linked to which formatting if I have more than 1 time the same value.

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[dubzzz]

Any chance to have this change merged in one of the future releases?

[dubzzz]

@plouc Any blocker for this one? It would help me to have it merged or work on helping merging it one day.

[plouc]

@dubzzz, I didn't review the PR yet, but there are some conflicts.

[dubzzz]

If you are ok with the change in 17c99d7, I can give it a try and re-open a new PR doing it. Thanks for the quick reply

[plouc]

@dubzzz, sure, I think this could be useful to some users, it would be a breaking change, but maybe it would be best to directly pass the point rather than adding a second argument, as data is part of it anyway. It would also be interesting to add tests for this.

[akassaei]

Hello @plouc ,
After synching with @dubzzz on the matter, we decided to create a separate PR for this
You can find it here : #2541
If you have some time it would be nice to have a review, thanks a lot for all the work you put on this 🙏

[dubzzz]

Thanks a lot for the new version of the PR @akassaei, looking forward to play with it ❤️

[plouc]

Superseded by #2541.