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[9.1] [Lens] Fix palette switching on Partition charts (#228051)#228242

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kibanamachine merged 1 commit intoelastic:9.1from
kibanamachine:backport/9.1/pr-228051
Jul 16, 2025
Merged

[9.1] [Lens] Fix palette switching on Partition charts (#228051)#228242
kibanamachine merged 1 commit intoelastic:9.1from
kibanamachine:backport/9.1/pr-228051

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Backport

This will backport the following commits from main to 9.1:

Questions ?

Please refer to the Backport tool documentation

## Summary

Fixes issue in Lens Partition chart which prevented the user from
switching legacy palettes.

https://github.com/user-attachments/assets/1cc3d222-f823-4135-9fde-257b75ebfbe0

Fixes elastic#227922

## Details

The issue here was that we are using `useDebouncedValue` which sets the
value async. When the user selects a legacy palette we call
`setLocalState` to set the palette then immediately call
`setColorMapping` which was overriding the palette changes.

Really we just need to clear the `colorMapping` when a `palette` is set.
Instead of doing this every time the palette is set, I added the
`onModeChange` callback to clear the `colorMapping` once when the mode
is set to legacy.

## Checklist

- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] Review the [backport
guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing)
and apply applicable `backport:*` labels.

## Release Notes

Fixes an issue where a Lens Partition chart (i.e. `Pie`) prevented the
user from selecting a legacy palette.

(cherry picked from commit 3cd7dec)
@kibanamachine kibanamachine added the backport This PR is a backport of another PR label Jul 16, 2025
@kibanamachine kibanamachine enabled auto-merge (squash) July 16, 2025 14:55
@kibanamachine kibanamachine merged commit 5e37b49 into elastic:9.1 Jul 16, 2025
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💚 Build Succeeded

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id before after diff
lens 1.5MB 1.5MB +32.0B

cc @nickofthyme

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backport This PR is a backport of another PR

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