/// <summary>
/// Calculates actual interval
/// </summary>
/// <param name="axis"></param>
/// <param name="range"></param>
/// <param name="availableSize"></param>
/// <param name="interval"></param>
/// <returns></returns>
internal static double CalculateActualInterval(ChartAxis axis, DoubleRange range, Size availableSize, object interval)
{
if (interval == null)
{
return(Math.Max(1d, Math.Floor(range.Delta / axis.GetActualDesiredIntervalsCount(availableSize))));
}
#if NETFX_CORE
return(Convert.ToDouble(interval));
#else
return(((double?)interval).Value);
#endif
}
/// <summary>
/// Calculates nice interval
/// </summary>
/// <param name="axis"></param>
/// <param name="actualRange"></param>
/// <param name="availableSize"></param>
/// <returns></returns>
internal static double CalculateNiceInterval(ChartAxis axis, DoubleRange actualRange, Size availableSize)
{
double delta = actualRange.Delta;
double actualDesiredIntervalsCount = axis.GetActualDesiredIntervalsCount(availableSize);
double niceInterval = delta;
double minInterval = Math.Pow(10, Math.Floor(Math.Log10(niceInterval)));
foreach (int mul in ChartAxis.c_intervalDivs)
{
double currentInterval = minInterval * mul;
if (actualDesiredIntervalsCount < (delta / currentInterval))
{
break;
}
niceInterval = currentInterval;
}
return(niceInterval >= 1 ? niceInterval : 1);
}
