/// <summary>
/// Apply padding based on interval
/// </summary>
/// <param name="axis">The axis.</param>
/// <param name="range">The range.</param>
/// <param name="interval">The interval.</param>
/// <param name="rangePadding">The range padding.</param>
/// <returns></returns>
internal static DoubleRange ApplyRangePadding(ChartAxis axis, DoubleRange range, double interval, NumericalPadding rangePadding)
{
if (rangePadding == NumericalPadding.Normal)
{
double minimum = 0,
remaining,
start = range.Start;
if (range.Start < 0)
{
start = 0;
minimum = range.Start + (range.Start / 20);
remaining = interval + (minimum % interval);
if ((0.365 * interval) >= remaining)
{
minimum -= interval;
}
if (minimum % interval < 0)
{
minimum = (minimum - interval) - (minimum % interval);
}
}
else
{
minimum = range.Start < ((5.0 / 6.0) * range.End)
? 0
: (range.Start - (range.End - range.Start) / 2);
if (minimum % interval > 0)
{
minimum -= (minimum % interval);
}
}
double maximum = (range.End + (range.End - start) / 20);
remaining = interval - (maximum % interval);
if ((0.365 * interval) >= remaining)
{
maximum += interval;
}
if (maximum % interval > 0)
{
maximum = (maximum + interval) - (maximum % interval);
}
range = new DoubleRange(minimum, maximum);
if (minimum == 0d)
{
axis.ActualInterval = axis.CalculateActualInterval(range, axis.AvailableSize);
return(new DoubleRange(0, Math.Ceiling(maximum / axis.ActualInterval) * axis.ActualInterval));
}
}
else if (rangePadding == NumericalPadding.Round ||
rangePadding == NumericalPadding.Additional)
{
double minimum = Math.Floor(range.Start / interval) * interval;
double maximum = Math.Ceiling(range.End / interval) * interval;
if (rangePadding == NumericalPadding.Additional)
{
minimum -= interval;
maximum += interval;
}
return(new DoubleRange(minimum, maximum));
}
return(range);
}
