Line Series Trackball Tooltip Format Series Name

[walsha2]

Description:

In the following example for a line series chart (where x-axis is DateTimeAxis and y-axis is NumericAxis) the following does not work as expected:

tooltipSettings: InteractiveTooltip(
	textStyle: ChartTextStyle(color: Colors.black, fontSize: 11),
	format: 'series.name: point.y',
	borderWidth: 1,
	borderColor: Colors.black,
	color: Color.fromRGBO(255, 255, 255, 0.75),
)

The tooltip label correctly parses and replaces point.y but does not do the same for series.name it just keeps it as the string: 'series.name' in the tool tip and does not update.

Issue Resolution:

Digging through the code, the following seems to be the culprit - series.name is completely missing:

lib/src/chart/user_interaction/trackball_painter.dart

labelValue = chart
  .trackballBehavior.tooltipSettings.format
  .replaceAll('point.x', (x ?? xValue).toString())
  .replaceAll('point.y',
      _getLabelValue(yValue, cartesianSeries._yAxis))
  .replaceAll('{', '')
  .replaceAll('}', '');

Changing to this to the following (adding series.name replacement), solved the issue:

labelValue = chart
  .trackballBehavior.tooltipSettings.format
  .replaceAll('point.x', (x ?? xValue).toString())
  .replaceAll('point.y',
      _getLabelValue(yValue, cartesianSeries._yAxis))
  .replaceAll('{', '')
  .replaceAll('}', '')
  .replaceAll('series.name', cartesianSeries.name);

[JayavigneshwaranG]

Hi @walsha2 ,

Sorry for the inconvenience.
We are able to reproduce the reported issue at our end and we have fixed this now. Published the fix to pub. So please use the latest version packages(1.0.0-beta.5).
Now series.name will be replaced with the appropriate value in the tooltip.

We are closing this issue. But you can reopen this if you face any concerns.

Thanks,
Jayavigneshwaran

[walsha2]

@JayavigneshwaranG confirmed - this is now fixed with the latest release. Thanks!