setData method

@override void setData(int index, ChartSegment segment)

Implementation

@override
void setData(int index, ChartSegment segment) {
  super.setData(index, segment);

  _startControlX1Values.clear();
  _startControlY1Values.clear();
  _endControlX1Values.clear();
  _endControlY1Values.clear();
  _startControlX2Values.clear();
  _startControlY2Values.clear();
  _endControlX2Values.clear();
  _endControlY2Values.clear();

  final List<num?> highCoefficients = List<num?>.filled(dataCount, 0);
  final List<num?> lowCoefficients = List<num?>.filled(dataCount, 0);
  _yMax = double.negativeInfinity;

  _isHigh = true;
  for (int i = 0; i < 2; i++) {
    final num x1 = xValues[index];
    final num y1 =
        _isHigh ? nonEmptyHighValues[index] : nonEmptyLowValues[index];
    num x2 = double.nan;
    num y2 = double.nan;

    final int nextIndex = index + 1;
    if (nextIndex < dataCount) {
      x2 = xValues[nextIndex];
      y2 = _isHigh
          ? nonEmptyHighValues[nextIndex]
          : nonEmptyLowValues[nextIndex];
    }

    _buildSplineAreaSegment(
      _isHigh ? highCoefficients : lowCoefficients,
      x1,
      y1,
      nextIndex,
      x2,
      y2,
      _isHigh ? nonEmptyHighValues : nonEmptyLowValues,
      _isHigh ? _startControlX1Values : _startControlX2Values,
      _isHigh ? _startControlY1Values : _startControlY2Values,
      _isHigh ? _endControlX1Values : _endControlX2Values,
      _isHigh ? _endControlY1Values : _endControlY2Values,
    );

    _isHigh = false;
  }

  segment as SplineRangeAreaSegment<T, D>
    ..series = this
    ..currentSegmentIndex = 0
    .._xValues = xValues
    .._highValues = highValues
    .._lowValues = lowValues
    .._startControlHighXValues = _startControlX1Values
    .._startControlHighYValues = _startControlY1Values
    .._endControlHighXValues = _endControlX1Values
    .._endControlHighYValues = _endControlY1Values
    .._startControlLowXValues = _startControlX2Values
    .._startControlLowYValues = _startControlY2Values
    .._endControlLowXValues = _endControlX2Values
    .._endControlLowYValues = _endControlY2Values;
}