[Time series echart] Need a threshold to show value labels.

[kamalkeshavani-aiinside]

Is your feature request related to a problem? Please describe.
A new feature is available in master, where user can select to show only total or all values for a stacked series. When showing all values, we see that the values are very cluttered when many series have close/similar values.

Sample:

Describe the solution you'd like
A good solution for this is in Pie chart, where the user can input the minimum threshold in percentage to decide which labels should be seen in chart.

I guess that if such threshold value is added by user in Time-series chart, then need to calculate % value of each series at each point on x-axis to decide which labels to show on every point of x-axis.

Describe alternatives you've considered
Another solution would be to set a fixed threshold from code, but I guess giving the option to user would be a better idea.

Additional context
Add any other context or screenshots about the feature request here.

[villebro]

This is an excellent suggestion! @junlincc @stephenLYZ let's consider how this could best be implemented.

[stephenLYZ]

Thanks for the suggestion! And the idea that calculating % value of each series are also very valuable.

[junlincc]

Absolutely agree! thanks for suggesting! @kamalkeshavani-aiinside.

The change seems to be a good first issue. I'm okay with simply adding a text input field.

[corbinrobb]

Do you mind if I give this a try? @junlincc

[eschutho]

yes, go for it @corbinrobb! Thank you!

[corbinrobb]

No problem! @eschutho I will have a PR up shortly