private static double GetFactor(double value)
{
var factor = 0d;
var valueToSF = SignificantDigits.ToSignificantDigits(value, 6);
while (valueToSF * Math.Pow(10, factor) != (int)(valueToSF * Math.Pow(10, factor)) && factor < 10)
{
factor++;
}
return(Math.Pow(10, factor));
}
private static double Adjust(AdjustType adjustType, double value, int sf)
{
var adjusted = adjustType == AdjustType.Down
? SignificantDigits.ToSignificantDigits(Math.Floor(value), sf)
: SignificantDigits.ToSignificantDigits(Math.Ceiling(value), sf);
var adjust = adjustType == AdjustType.Down
? adjusted > value
: adjusted < value;
while (adjust)
{
if (adjustType == AdjustType.Down)
{
adjusted -= 1;
adjust = adjusted > value;
}
else
{
adjusted += 1;
adjust = adjusted < value;
}
}
return(adjusted);
}
/// <summary>
///
/// </summary>
/// <param name="parCode"></param>
/// <param name="seriesCollection"></param>
public YaxisSettings(string parCode, SeriesCollection seriesCollection)
{
switch (parCode.ToUpper())
{
case "W_PDIR":
Minimum = 0;
Maximum = 360;
Interval = 30;
break;
case "W_SPR":
Minimum = 0;
Maximum = 90;
Interval = 10;
break;
default:
// Get value range for y-Axis
double valuesMin;
double valuesMax;
try
{
valuesMin =
(from series
in seriesCollection
select series.Points.FindMinByValue().YValues[0])
.Min();
valuesMax =
(from series
in seriesCollection
select series.Points.FindMaxByValue().YValues[0])
.Max();
}
catch
{
valuesMin = 0;
valuesMax = 100;
}
// Derive Minimum and Maximum
const double MINMAX_ADJUSTMENT = 0.001;
var minFactor = GetFactor(valuesMin);
var minimum = SignificantDigits.ToSignificantDigits(Math.Floor(valuesMin * minFactor) / minFactor, 3);
while (minimum > valuesMin - valuesMin * MINMAX_ADJUSTMENT)
{
minimum -= minimum * MINMAX_ADJUSTMENT;
}
Minimum = minimum;
var maxFactor = GetFactor(valuesMax);
var maximum = SignificantDigits.ToSignificantDigits(Math.Ceiling(valuesMax * maxFactor) / maxFactor, 3);
while (maximum < valuesMax + valuesMax * MINMAX_ADJUSTMENT)
{
maximum += maximum * MINMAX_ADJUSTMENT;
}
Maximum = maximum;
// Ensure minimum range
const double RANGE_MIN = 0.3;
if (Range < RANGE_MIN)
{
var correction = (RANGE_MIN - Range) / 2;
Minimum -= correction;
Maximum += correction;
}
// 'Normalise' min/max and derive interval
if (Range <= 0.6)
{
Minimum = Math.Floor(Minimum * 20) / 20;
Maximum = Math.Ceiling(Maximum * 20) / 20;
Interval = 0.05;
}
else if (Range <= 2.5)
{
Minimum = Math.Floor(Minimum * 10) / 10;
Maximum = Math.Ceiling(Maximum * 10) / 10;
Interval = 0.25;
}
else if (Range <= 5)
{
Minimum = Math.Floor(Minimum * 5) / 5;
Maximum = Math.Ceiling(Maximum * 5) / 5;
Interval = 0.5;
}
else if (Range <= 10)
{
Minimum = Adjust(AdjustType.Down, Minimum, 2);
Maximum = Adjust(AdjustType.Up, Maximum, 2);
Interval = 1;
}
else
{
Minimum = Adjust(AdjustType.Down, Minimum, 1);
Maximum = Adjust(AdjustType.Up, Maximum, 1);
Interval = SignificantDigits.ToSignificantDigits(Range / 10, 2);
}
// Minor tick interval
MinorTickInterval = Range / Interval < 6
? Interval / 2
: default(double?);
// Derive label format (defaults to "f0"):
for (var format = 0; format < 4; format++)
{
var formatString = $"f{format}";
if (double.Parse(Interval.ToString(formatString)) == Interval)
{
LabelFormat = formatString;
break;
}
}
break;
}
}