getTooltips method
Called when the databroker returns a successful result
ChartModel overrides WidgetModel's onDataSourceSuccess to populate the series data from the datasource and to populate the label data from the datasource data.
Implementation
@override
List<Widget> getTooltips(List<IExtendedSeriesInterface> spots) {
List<Widget> views = [];
for (var spot in spots) {
var series =
this.series.firstWhereOrNull((element) => element == spot.series);
views.addAll(buildTooltip(series, spot));
}
return views;
}