Changeset 14152
 Timestamp:
 07/21/16 13:51:27 (8 years ago)
 File:

 1 edited
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trunk/sources/HeuristicLab.Visualization.ChartControlsExtensions/3.3/ChartUtil.cs
r14125 r14152 27 27 public static class ChartUtil { 28 28 public static void CalculateAxisInterval(double min, double max, int ticks, out double axisMin, out double axisMax, out double axisInterval) { 29 var dmin = (max  min).Decimals(); 30 axisMin = min.Floor(dmin); 31 var range = max  axisMin; 32 var slice = range / ticks; 33 var dslice = slice.Decimals(); 34 var floor = slice.Floor(dslice); 35 var ceil = slice.Ceil(dslice); 36 var axisRange = floor * ticks; 37 axisInterval = floor; 38 if (axisRange < max  axisMin) { 39 axisRange = ceil * ticks; 40 axisInterval = ceil; 29 if (double.IsInfinity(min)  double.IsNaN(min)  double.IsInfinity(max)  double.IsNaN(max)  (min >= max)) 30 throw new ArgumentOutOfRangeException("Invalid range provided."); 31 32 var range = max  min; 33 var minLog = Math.Log10(Math.Abs(min)); 34 var maxLog = Math.Log10(Math.Abs(max)); 35 var rangeLog = Math.Log10(range); 36 37 var dMin = (int)Math.Floor(minLog); 38 var dMax = (int)Math.Floor(maxLog); 39 var dRange = (int)Math.Floor(rangeLog); 40 41 int decimalRank; 42 if (dMin == dMax && dMax == dRange) 43 decimalRank = dMin  1; 44 else 45 decimalRank = Math.Min(Math.Min(dMin, dMax), dRange); 46 47 var aMin = min.RoundDown(decimalRank); 48 var aMax = max.RoundUp(decimalRank); 49 50 // if one of the interval ends is a multiple of 5 or 10, change the other interval end to be a multiple as well 51 if (((aMin % 5).IsAlmost(0)  (aMin % 10).IsAlmost(0)) && !((aMax % 5).IsAlmost(0)  (aMax % 10).IsAlmost(0))) { 52 aMax = Math.Min(aMax + 5  aMax % 5, aMax + 10  aMax % 10); 53 } else if (((aMax % 5).IsAlmost(0)  (aMax % 10).IsAlmost(0)) && !((aMin % 5).IsAlmost(0)  (aMin % 10).IsAlmost(0))) { 54 aMin = Math.Max(aMin  aMin % 5, aMin  aMin % 10); 41 55 } 42 axisMax = axisMin + axisRange; 56 57 axisMin = aMin; 58 axisMax = aMax; 59 axisInterval = (aMax  aMin) / ticks; 43 60 } 44 61 … … 66 83 } 67 84 85 // find the number of decimals needed to represent the value 68 86 private static int Decimals(this double x) { 69 87 if (x.IsAlmost(0)  double.IsInfinity(x)  double.IsNaN(x)) … … 79 97 } 80 98 99 private static double RoundDown(this double value, int decimalRank) { 100 if (decimalRank > 0) { 101 var floor = (int)Math.Floor(value); 102 var pow = (int)Math.Pow(10, decimalRank); 103 // round down to nearest multiple of 5 or 10 104 var mod = Math.Min(floor % pow, floor % (pow / 2)); 105 return floor  mod; 106 } 107 return value.Floor(Math.Abs(decimalRank)); 108 } 109 110 private static double RoundUp(this double value, int decimalRank) { 111 if (decimalRank > 0) { 112 var ceil = (int)Math.Ceiling(value); 113 var pow = (int)Math.Pow(10, decimalRank); 114 // round up to nearest multiple of 5 or 10 115 var mod = ceil % (pow / 2) == 0  ceil % pow == 0 ? 0 : Math.Min(pow / 2  ceil % (pow / 2), pow  ceil % pow); 116 return ceil + mod; 117 } 118 return value.Ceil(Math.Abs(decimalRank)); 119 } 120 121 private static double RoundNearest(this double value, int decimalRank) { 122 var nearestDown = value.RoundDown(decimalRank); 123 var nearestUp = value.RoundUp(decimalRank); 124 125 if (nearestUp  value > value  nearestDown) 126 return nearestDown; 127 128 return nearestUp; 129 } 130 81 131 // rounds down to the nearest value according to the given number of decimal precision 82 132 private static double Floor(this double value, int precision) { … … 85 135 } 86 136 137 // rounds up to the nearest value according to the given number of decimal precision 87 138 private static double Ceil(this double value, int precision) { 88 139 var n = Math.Pow(10, precision); 89 140 return Math.Round(Math.Ceiling(value * n) / n, precision); 90 }91 92 private static double Round(this double value, int precision) {93 var n = Math.Pow(10, precision);94 return Math.Round(Math.Round(value * n) / n, precision);95 141 } 96 142
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