Dynamically changing tooltipBgColor

[davide-capozzi]

Don't make a duplicate issue.
I didn't find anything like this, sorry if i missed something

Is your feature request relasted to a problem? Please describe.
I would like to be able to dynamically change the tooltipBgColor, in the same way getTooltipItems allows to change the text of a tooltip

Describe the solution you'd like
Ideally this change would be included in the tooltipItem so that also the popup can be configured in the same place, the expected behaviour at the end is the ability to show tooltips of different colors based on the y value of the line, (i.e: i would like to have tooltips for points below 0 to have a black background and tooltips above 0 to have a white background)

Describe alternatives you've considered
i have considered just changing the color of the text, but changing the color of the background is really what i would like to achieve

Additional context
This is the tooltip i'm talking about, i hope it's clear enought even if i don't provide example with both colors

If there is already a way to do this could you show me an example?

[imaNNeo]

So we need to implement a callback to receive a color based on the provided data to paint the background.
We should do this for all of line, bar and scatter charts to keep the consistency.

[david-legend]

I am currently in such a dilemma. For every tooltip provided for a barChart rod, I want each rod to be able to have a different tooltip background color.
Thanks a lot for the amazing work!!

[apekshamehta]

Hi, I have been working as an iOS application developer for about 4.5 years, and I am currently learning Flutter. I would like to contribute to your open-source project, starting with the change mentioned above. I am in the process of setting up the code base.

[imaNNeo]

@apekshamehta Correct choice :))
I was an Android developer for about 7 years, now I completely switched to Flutter and to be honest, it's beautiful.
btw, welcome to the Flutter world

You can start working on this issue, read the code, you can find some samples that we have a callback to get the color from the user.

Don't forget to read the contributing guideline

[apekshamehta]

@imaNNeo
Thank you for your response, and I apologize for the delayed reply. I was on vacation.

I wanted to provide an update regarding the changes I made. The implementation can be reviewed in my branch named "feature/dynamic-tooltip-bgcolor." Additionally, I have provided comprehensive details regarding the changes in my pull request. I kindly request your valuable feedback on the modifications I have made.

[imaNNeo]

t. I kindly request your valuable feedback on the modifications I have made.

Good to have your PR ready, I've written some comments. check them out

[sivaperumal202009]

This feature looks good. @imaNNeo can we expect this anytime soon?

[iamiota]

There are 2 lines with different colors on a chart, and they have tooltips with their respective tooltipBgColor.
This makes sense.

[imaNNeo]

Added getTooltipColor getter in 0.67.0
Don't forget to read the migration guide carefully