Popup Additional Information Feature

[yashwanthgajji]

This PR adds an additional function to add label to the popup properties content.

This fixes #64

Please let me know if this fix is okay for this issue.

[ehsannarmani]

Hi @yashwanthgajji , thank you so much for your interest and work on this project and issue.

But the exact issue and feature request was not which you implemented.

We already had access to label of line and show it in popup, because you can implement contentBuilder for each popup in line data class too, so you have access to line label in there, no needed to have line label in content builder lambda parameters.

For example:

data.map{
    Line(label = it.label, popupProperties = PopupProperties(contentBuilder = { value-> "${it.label}: $value"}))
}

But about the main goal and feature of this issue:
imagine you have this values as data: 20,15,10,17,18
and you have this values as labels for line values: 13 Dec, 14 Dec, 15 Dec, 16 Dec, 17 Dec
in the popupBuilder lambda, we should have access to current label of value
for example if you are dragging on line chart which is on 13 Dec range, we should have this in popupBuilder lambda

I hope I was able to convey the goal of issue, if you have any questions, ask.

[yashwanthgajji]

Oh okay. Got your point. Will try that way

[jamu1989]

I need the data index in the builder where the value comes from. With that functionality I can build a relation between data source and presented value.

Example: