protected override Task <bool> OnSketchCompleteAsync(Geometry geometry)
{
if (Module1.Current.SelectedGraphicsLayerTOC == null)
{
MessageBox.Show("Select a graphics layer in the TOC", "No graphics layer selected",
System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Exclamation);
return(Task.FromResult(true));
}
return(QueuedTask.Run(() => {
var lineSketched = geometry as Polyline;
//Create MultipPoints from the sketched line
var multiPoints = MultipointBuilderEx.CreateMultipoint(lineSketched);
//specify a symbol
var point_symbol = SymbolFactory.Instance.ConstructPointSymbol(
ColorFactory.Instance.GreenRGB);
//create a CIMGraphic using the Multi-points
var graphic = new CIMMultipointGraphic
{
Symbol = point_symbol.MakeSymbolReference(),
Multipoint = multiPoints
};
//Add the graphic to the layer
Module1.Current.SelectedGraphicsLayerTOC.AddElement(graphic);
return true;
}));
}
/// <summary>
/// Create a single multi-point feature that is comprised of 20 points.
/// </summary>
/// <param name="multiPointLayer">Multi-point geometry feature layer used to add the multi-point feature.</param>
/// <returns></returns>
private Task ConstructSampleMultiPoints(FeatureLayer multiPointLayer)
{
// create a random number generator
var randomGenerator = new Random();
// the database and geometry interactions are considered fine-grained and need to be executed on
// a separate thread
return(QueuedTask.Run(() =>
{
// get the feature class associated with the layer
var featureClass = multiPointLayer.GetTable() as FeatureClass;
var featureClassDefinition = featureClass.GetDefinition() as FeatureClassDefinition;
// store the spatial reference as its own variable
var spatialReference = featureClassDefinition.GetSpatialReference();
// define an area of interest. Random points are generated in the allowed
// confines of the allow extent range
var areaOfInterest = MapView.Active.Extent;
// start an edit operation to create new (random) multi-point feature
var createOperation = new EditOperation()
{
Name = "Generate multipoints"
};
// retrieve the class definition of the point feature class
var classDefinition = featureClass.GetDefinition() as FeatureClassDefinition;
Multipoint newPoints = null;
// generate either 2D or 3D geometries
if (classDefinition.HasZ())
{
// 3D
// create a list to hold the 20 coordinates of the multi-point feature
IList <Coordinate3D> coordinateList = new List <Coordinate3D>(20);
for (int i = 0; i < 20; i++)
{
coordinateList.Add(randomGenerator.NextCoordinate3D(areaOfInterest));
}
newPoints = MultipointBuilderEx.CreateMultipoint(coordinateList, classDefinition.GetSpatialReference());
}
else
{
// 2D
// create a list to hold the 20 coordinates of the multi-point feature
IList <Coordinate2D> coordinateList = new List <Coordinate2D>(20);
for (int i = 0; i < 20; i++)
{
coordinateList.Add(randomGenerator.NextCoordinate2D(areaOfInterest));
}
newPoints = MultipointBuilderEx.CreateMultipoint(coordinateList, classDefinition.GetSpatialReference());
}
// create and execute the feature creation operation
createOperation.Create(multiPointLayer, newPoints);
return createOperation.ExecuteAsync();
}));
}
