public static CIMStroke CreateSolidStroke(CIMColor color, double width = -1)
{
var solidStroke = new CIMSolidStroke();
solidStroke.Color = color ?? DefaultStrokeColor;
solidStroke.ColorLocked = false;
solidStroke.CapStyle = LineCapStyle.Round;
solidStroke.JoinStyle = LineJoinStyle.Round;
solidStroke.MiterLimit = 10.0;
solidStroke.Width = width >= 0 ? width : DefaultStrokeWidth;
solidStroke.Enable = true;
return(solidStroke);
}
public static CIMLineSymbol CreateLineSymbol(float red, float green, float blue,
double lineWidth)
{
CIMColor color = ColorUtils.CreateRGB(red, green, blue);
var solidStroke = new CIMSolidStroke
{
Color = color,
Width = lineWidth
};
CIMLineSymbol lineSymbol = CreateLineSymbol(solidStroke);
return(lineSymbol);
}
/// <summary>
/// Renders a polygon feature layer with Dot Density symbols to represent quantities.
/// 
/// </summary>
/// <remarks></remarks>
/// <returns></returns>
internal static Task DotDensityRendererAsync()
{
//Check feature layer name
//Code works with the USDemographics feature layer available with the ArcGIS Pro SDK Sample data
var featureLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType <FeatureLayer>().FirstOrDefault(f => f.Name == "USDemographics");
if (featureLayer == null)
{
MessageBox.Show("This renderer works with the USDemographics feature layer available with the ArcGIS Pro SDK Sample data", "Data missing");
return(Task.FromResult(0));
}
return(QueuedTask.Run(() =>
{
//Define size of the dot to use for the renderer
int dotSize = 3;
//Check if the TOTPOP10 field exists
int idxField = -1;
using (var table = featureLayer.GetTable())
{
var def = table.GetDefinition();
idxField = def.FindField("TOTPOP10");
}
// "TOTPOP10" field was not found
if (idxField == -1)
{
return;
}
//array of fields to be represented in the renderer
string[] valueFields = new string[] { "TOTPOP10" };
//Create the DotDensityRendererDefinition object
var dotDensityDef = new DotDensityRendererDefinition(valueFields, SDKHelpers.GetColorRamp(),
dotSize, 30000, "Dot", "people");
//Create the renderer using the DotDensityRendererDefinition
CIMDotDensityRenderer dotDensityRndr = (CIMDotDensityRenderer)featureLayer.CreateRenderer(dotDensityDef);
//if you want to customize the dot symbol for the renderer, create a "DotDensitySymbol" which is an
//Amalgamation of 3 symbol layers: CIMVectorMarker, CIMSolidFill and CIMSolidStroke
//Define CIMVectorMarker layer
var cimMarker = SymbolFactory.Instance.ConstructMarker(ColorFactory.Instance.RedRGB, dotSize);
var dotDensityMarker = cimMarker as CIMVectorMarker;
//Definte the placement
CIMMarkerPlacementInsidePolygon markerPlacement = new CIMMarkerPlacementInsidePolygon {
Randomness = 100, GridType = PlacementGridType.RandomFixedQuantity, Clipping = PlacementClip.RemoveIfCenterOutsideBoundary
};
dotDensityMarker.MarkerPlacement = markerPlacement;
//Define CIMSolidFill layer
CIMSolidFill solidFill = new CIMSolidFill {
Color = new CIMRGBColor {
R = 249, G = 232, B = 189, Alpha = 50
}
};
//Define CIMSolidStroke
CIMSolidStroke solidStroke = new CIMSolidStroke {
Color = ColorFactory.Instance.GreyRGB, Width = .5
};
//Create the amalgamated CIMPolygonSymbol that includes the 3 layers
var dotDensitySymbol = new CIMPolygonSymbol
{
SymbolLayers = new CIMSymbolLayer[] { dotDensityMarker, solidFill, solidStroke }
};
//Apply the dotDensitySymbol to the CIMDotDenstityRenderer's DotDensitySymbol property.
dotDensityRndr.DotDensitySymbol = dotDensitySymbol.MakeSymbolReference();
//Apply the renderer to the polygon Feature Layer.
featureLayer.SetRenderer(dotDensityRndr);
}));
}