tooltipInfo method

TooltipInfo? tooltipInfo({ Offset? position, int? pointIndex, })

Implementation

TooltipInfo? tooltipInfo({Offset? position, int? pointIndex}) {
  for (final int segmentIndex in trendSegmentIndexes) {
    pointIndex ??= segmentIndex;
    final CartesianChartPoint<dynamic> chartPoint = _chartPoint(pointIndex);
    final ChartMarker marker =
        _markers.isNotEmpty ? _markers[pointIndex] : ChartMarker();
    final double markerHeight =
        markerSettings.isVisible ? marker.height / 2 : 0;
    final Offset preferredPos = _points[pointIndex];
    return TrendlineTooltipInfo(
      primaryPosition:
          localToGlobal(preferredPos.translate(0, -markerHeight)),
      secondaryPosition:
          localToGlobal(preferredPos.translate(0, markerHeight)),
      text: series!.tooltipText(chartPoint),
      header: series!.parent!.tooltipBehavior!.shared
          ? series!.tooltipHeaderText(chartPoint)
          : series!.name,
      data: series!.dataSource![pointIndex],
      point: chartPoint,
      series: series!.widget,
      renderer: series!,
      seriesIndex: series!.index,
      segmentIndex: segmentIndex,
      pointIndex: pointIndex,
      markerColors: <Color?>[color],
      markerType: marker.type,
    );
  }
  return null;
}