getHighlight method

@override Highlight? getHighlight(double x, double y)

Implementation

@override
Highlight? getHighlight(double x, double y) {
  double touchDistanceToCenter = _painter!.distanceToCenter(x, y);

  // check if a slice was touched
  if (touchDistanceToCenter > _painter!.getRadius()) {
    // if no slice was touched, highlight nothing
    return null;
  } else {
    double angle = _painter!.getAngleForPoint(x, y);

    if (_painter is PieChartPainter) {
      angle /= _painter!.animator!.getPhaseY();
    }

    int index = _painter!.getIndexForAngle(angle);

    // check if the index could be found
    if (index < 0 ||
        index >=
            _painter!.getData()!.getMaxEntryCountSet()!.getEntryCount()) {
      return null;
    } else {
      return getClosestHighlight(index, x, y);
    }
  }
}