public static CategorialTheme CreateCategorialTheme(string attribute, VectorStyle defaultStyle, ColorBlend blend,
int numberOfClasses, IList <IComparable> values, List <string> categories, int sizeMin, int sizeMax)
{
if (defaultStyle == null)
{
defaultStyle = new VectorStyle
{
GeometryType = typeof(IPolygon)
};
}
var categorialTheme = new CategorialTheme(attribute, defaultStyle);
for (int i = 0; i < numberOfClasses; i++)
{
string label = (categories != null)
? categories[i]
: values[i].ToString();
Color color = (numberOfClasses > 1)
? blend.GetColor((float)i / (numberOfClasses - 1))
: ((SolidBrush)defaultStyle.Fill).Color;
var vectorStyle = (VectorStyle)defaultStyle.Clone();
var size = sizeMin + (sizeMax - sizeMin) * i / (float)numberOfClasses;
if (defaultStyle.GeometryType == typeof(IPoint))
{
vectorStyle.Fill = new SolidBrush(color);
vectorStyle.Line.Width = 16;
vectorStyle.Shape = defaultStyle.Shape;
}
else if ((defaultStyle.GeometryType == typeof(IPolygon)) || (defaultStyle.GeometryType == typeof(IMultiPolygon)))
{
vectorStyle.Fill = new SolidBrush(color);
}
else if ((defaultStyle.GeometryType == typeof(ILineString)) || (defaultStyle.GeometryType == typeof(IMultiLineString)))
{
vectorStyle.Line = CreatePen(color, size, defaultStyle.Line);
}
else
{
vectorStyle.Fill = new SolidBrush(color);
}
CategorialThemeItem categorialThemeItem = (values[i] != null)
? new CategorialThemeItem(label, vectorStyle, vectorStyle.LegendSymbol, values[i])
: new CategorialThemeItem(label, vectorStyle, vectorStyle.LegendSymbol);
categorialTheme.AddThemeItem(categorialThemeItem);
}
return(categorialTheme);
}
public override object Clone()
{
var categorialTheme = new CategorialTheme(AttributeName, (IStyle)defaultStyle.Clone());
foreach (CategorialThemeItem categorialThemeItem in ThemeItems)
{
categorialTheme.ThemeItems.Add((CategorialThemeItem)categorialThemeItem.Clone());
}
if (NoDataValues != null)
{
categorialTheme.NoDataValues = NoDataValues.Cast <object>().ToArray();
}
return(categorialTheme);
}