/// <summary>
/// Generate label categories for the given set of shapefile categories
/// </summary>
/// <param name="mapWin">The reference to MapWindow</param>
/// <param name="layerHandle">The handle of the layer</param>
internal static void GenerateCategories(LegendControl.Legend legend, int layerHandle)
{
Layer lyr = legend.GetLayer(layerHandle);
Shapefile sf = lyr.GetObject() as MapWinGIS.Shapefile;
Labels lb = sf.Labels;
sf.Labels.ClearCategories();
for (int i = 0; i < sf.Categories.Count; i++)
{
ShapefileCategory cat = sf.Categories.get_Item(i);
LabelCategory labelCat = lb.AddCategory(cat.Name);
labelCat.Expression = cat.Expression;
}
SymbologySettings settings = Globals.get_LayerSettings(layerHandle);
ColorBlend blend = (ColorBlend)settings.LabelsScheme;
if (blend != null)
{
ColorScheme scheme = ColorSchemes.ColorBlend2ColorScheme(blend);
if (settings.LabelsRandomColors)
{
lb.ApplyColorScheme(tkColorSchemeType.ctSchemeRandom, scheme);
}
else
{
lb.ApplyColorScheme(tkColorSchemeType.ctSchemeGraduated, scheme);
}
}
if (settings.LabelsVariableSize)
{
for (int i = 0; i < lb.NumCategories; i++)
{
lb.get_Category(i).FontSize = (int)((double)sf.Labels.FontSize +
(double)settings.LabelsSizeRange / ((double)lb.NumCategories - 1) * (double)i);
}
}
// Expressions aren't supported by labels yet, therefore we need to copy indices from the symbology
for (int i = 0; i < lb.Count; i++)
{
MapWinGIS.Label label = lb.get_Label(i, 0);
label.Category = sf.get_ShapeCategory(i);
}
}
public void ApplyColors(SchemeType coloringType, ColorRamp colors)
{
_labels.ApplyColorScheme((tkColorSchemeType)coloringType, colors.GetInternal());
}