public static Dictionary <string, Brush> CreateValueDependentBrushes(this HistoGrapher hg, double minValue, double maxValue, Func <double, Color> colorMapper)
{
Contract.Requires <ArgumentNullException>(hg != null, "hg");
Contract.Requires <ArgumentNullException>(colorMapper != null, "colorMapper");
Contract.Requires <ArgumentException>(minValue < maxValue, "The minimum value should be less than the maximum value.");
Contract.Requires <ArgumentException>(hg.MinValue >= minValue && hg.MaxValue <= maxValue, "HistoGrapher's values should not exceed the explicitly specified bounds of colour.");
return(hg.CreateValueDependentBrushes(minValue, maxValue, (x => new SolidBrush(colorMapper(x)))));
}
public static Dictionary <string, Brush> CreateValueDependentBrushes(this HistoGrapher hg, double minValue, double maxValue, Func <double, Brush> brushMapper)
{
Contract.Requires <ArgumentNullException>(hg != null, "hg");
Contract.Requires <ArgumentNullException>(brushMapper != null, "brushMapper");
Contract.Requires <ArgumentException>(minValue < maxValue, "The minimum value should be less than the maximum value.");
Contract.Requires <ArgumentException>(hg.MinValue >= minValue && hg.MaxValue <= maxValue, "HistoGrapher's values should not exceed the explicitly specified bounds of colour.");
Dictionary <string, Brush> result = new Dictionary <string, Brush>();
double rangeLength = maxValue - minValue;
foreach (KeyValuePair <string, double> kvp in hg.pointValuePairs)
{
double coefficient = (kvp.Value - minValue) / rangeLength;
result.Add(kvp.Key, brushMapper(coefficient));
}
return(result);
}
public static Dictionary <string, Brush> CreateValueDependentBrushes(this HistoGrapher hg, double minValue, double maxValue, Color minColor, Color maxColor)
{
Contract.Requires <ArgumentNullException>(hg != null, "hg");
Contract.Requires <ArgumentException>(minValue < maxValue, "The minimum value should be less than the maximum value.");
Contract.Requires <ArgumentException>(hg.MinValue >= minValue && hg.MaxValue <= maxValue, "HistoGrapher's values should not exceed the explicitly specified bounds of colour.");
double rDiff = maxColor.R - minColor.R;
double gDiff = maxColor.G - minColor.G;
double bDiff = maxColor.B - minColor.B;
double aDiff = maxColor.A - minColor.A;
Func <double, Color> colorMapper = delegate(double k)
{
int rNew = minColor.R + (int)(k * rDiff);
int gNew = minColor.G + (int)(k * gDiff);
int bNew = minColor.B + (int)(k * bDiff);
int aNew = minColor.A + (int)(k * aDiff);
return(Color.FromArgb(aNew, rNew, gNew, bNew));
};
return(hg.CreateValueDependentBrushes(minValue, maxValue, colorMapper));
}
