internal int CurveIndexFromCanvasPoint(Point canvasPoint)
{
Point graphPoint = canvasToGraph.Transform(canvasPoint);
double value = curve.SortedValues == SortedValues.X ? graphPoint.X : graphPoint.Y;
int index = Curve.GetInterpolatedIndex(curve.TransformedSorted, value);
if (index == (curve.xTransformed.Length - 1))
{
return(curve.SortedToUnsorted[curve.xTransformed.Length - 1]);
}
// otherwise return nearest:
if ((curve.TransformedSorted[index + 1] - value) < (value - curve.TransformedSorted[index]))
{
return(curve.SortedToUnsorted[index + 1]);
}
else
{
return(curve.SortedToUnsorted[index]);
}
}
