getDetailsForSeriesDatum method

@override DatumDetails<D> getDetailsForSeriesDatum(SeriesDatum<D> seriesDatum)

Get an expanded set of processed DatumDetails for a given SeriesDatum.

This is typically called by chart behaviors that need to get full details on selected data.

Implementation

@override
DatumDetails<D> getDetailsForSeriesDatum(SeriesDatum<D> seriesDatum) {
  // Generate details relevant to every type of series renderer. Position
  // details are left as an exercise for every renderer that extends this
  // class.
  final series = seriesDatum.series;
  final index = seriesDatum.index;
  final domainFn = series.domainFn;
  final domainLowerBoundFn = series.domainLowerBoundFn;
  final domainUpperBoundFn = series.domainUpperBoundFn;
  final measureFn = series.measureFn;
  final measureLowerBoundFn = series.measureLowerBoundFn;
  final measureUpperBoundFn = series.measureUpperBoundFn;
  final measureOffsetFn = series.measureOffsetFn;
  final rawMeasureFn = series.rawMeasureFn;
  final rawMeasureLowerBoundFn = series.rawMeasureLowerBoundFn;
  final rawMeasureUpperBoundFn = series.rawMeasureUpperBoundFn;
  final colorFn = series.colorFn;
  final areaColorFn = series.areaColorFn ?? colorFn;
  final fillColorFn = series.fillColorFn ?? colorFn;
  final radiusPxFn = series.radiusPxFn;
  final strokeWidthPxFn = series.strokeWidthPxFn;

  final domainValue = domainFn(index);
  final domainLowerBoundValue = domainLowerBoundFn?.call(index);
  final domainUpperBoundValue = domainUpperBoundFn?.call(index);

  final measureValue = measureFn(index);
  final measureLowerBoundValue = measureLowerBoundFn?.call(index);
  final measureUpperBoundValue = measureUpperBoundFn?.call(index);
  final measureOffsetValue = measureOffsetFn?.call(index);

  final rawMeasureValue = rawMeasureFn(index);
  final rawMeasureLowerBoundValue = rawMeasureLowerBoundFn?.call(index);
  final rawMeasureUpperBoundValue = rawMeasureUpperBoundFn?.call(index);

  final color = colorFn!(index);

  // Fill color is an optional override for color. Make sure we get a value if
  // the series doesn't define anything specific.
  var fillColor = fillColorFn!(index);
  fillColor ??= color;

  // Area color is entirely optional.
  final areaColor = areaColorFn!(index);

  var radiusPx = radiusPxFn?.call(index)?.toDouble();
  radiusPx = radiusPx?.toDouble();

  var strokeWidthPx = strokeWidthPxFn?.call(index)?.toDouble();
  strokeWidthPx = strokeWidthPx?.toDouble();

  final details = DatumDetails<D>(
      datum: seriesDatum.datum,
      index: seriesDatum.index,
      domain: domainValue,
      domainLowerBound: domainLowerBoundValue,
      domainUpperBound: domainUpperBoundValue,
      measure: measureValue,
      measureLowerBound: measureLowerBoundValue,
      measureUpperBound: measureUpperBoundValue,
      measureOffset: measureOffsetValue,
      rawMeasure: rawMeasureValue,
      rawMeasureLowerBound: rawMeasureLowerBoundValue,
      rawMeasureUpperBound: rawMeasureUpperBoundValue,
      series: series,
      color: color,
      fillColor: fillColor,
      areaColor: areaColor,
      radiusPx: radiusPx,
      strokeWidthPx: strokeWidthPx);

  // chartPosition depends on the shape of the rendered elements, and must be
  // added by concrete [SeriesRenderer] classes.
  return addPositionToDetailsForSeriesDatum(details, seriesDatum);
}