segmentPointIndex method
Implementation
@override
int segmentPointIndex(Offset position, ChartSegment segment) {
final RangeAreaSegment rangeAreaSegment = segment as RangeAreaSegment;
final int index = _computePointIndex(rangeAreaSegment._lowPoints, position);
if (index != -1) {
return index;
}
return _computePointIndex(rangeAreaSegment._highPoints, position);
}