getIndexForAngle method
Returns the xIndex for the given angle around the center of the chart. Returns -1 if not found / outofbounds.
@param angle @return
Implementation
@override
int getIndexForAngle(double angle) {
// take the current angle of the chart into consideration
double a = Utils.getNormalizedAngle(angle - getRotationAngle());
for (int i = 0; i < _absoluteAngles.length; i++) {
if (_absoluteAngles[i]! > a) return i;
}
return -1; // return -1 if no index found
}