/// <summary>
/// Create a circular polygon around a mappoint for with a radius in pixels.
/// </summary>
/// <param name="mapPoint">Center of the circle as a mappoint.</param>
/// <param name="pixels">Circle radius in screen pixels.</param>
/// <returns>A polygon geometry.</returns>
private Polygon CreateSearchPolygon(MapPoint mapPoint, int pixels)
{
//get search radius
var screenPoint = MapView.Active.MapToScreen(mapPoint);
var radiusScreenPoint = new System.Windows.Point((screenPoint.X + pixels), screenPoint.Y);
var radiusMapPoint = MapView.Active.ScreenToMap(radiusScreenPoint);
var searchRadius = GeometryEngine.Instance.Distance(mapPoint, radiusMapPoint);
//build a search circle geometry
var cent = new Coordinate2D(mapPoint);
var searchGeom = EllipticArcBuilderEx.CreateCircle(cent, searchRadius, ArcOrientation.ArcClockwise, MapView.Active.Map.SpatialReference);
var searchPB = new PolygonBuilderEx(new[] { searchGeom }, AttributeFlags.None);
return(searchPB.ToGeometry());
}
/// <summary>
/// Called when the sketch finishes. This is where we will create the sketch operation and then execute it.
/// </summary>
/// <param name="geometry">The geometry created by the sketch.</param>
/// <returns>A Task returning a Boolean indicating if the sketch complete event was successfully handled.</returns>
protected override Task <bool> OnSketchCompleteAsync(Geometry geometry)
{
if (CurrentTemplate == null || geometry == null)
{
return(Task.FromResult(false));
}
return(QueuedTask.Run(() =>
{
//build a circular arc
var cent = new Coordinate2D(geometry as MapPoint);
var circleEAB = EllipticArcBuilderEx.CreateCircle(cent, Radius, ArcOrientation.ArcClockwise, MapView.Active.Map.SpatialReference);
// find the source layer and determine whether polyline/polygon. Create the appropriate shape
var lyr = CurrentTemplate.Layer as BasicFeatureLayer;
Geometry circleGeom = null;
if (lyr.ShapeType == esriGeometryType.esriGeometryPolygon)
{
circleGeom = PolygonBuilderEx.CreatePolygon(new[] { circleEAB }, AttributeFlags.None);
}
else
{
circleGeom = PolylineBuilderEx.CreatePolyline(circleEAB, AttributeFlags.None);
}
// Create an edit operation
var createOperation = new EditOperation();
createOperation.Name = string.Format("Create circular {0}", CurrentTemplate.Layer.Name);
createOperation.SelectNewFeatures = true;
// Queue feature creation
createOperation.Create(CurrentTemplate, circleGeom);
// Execute the operation
return createOperation.ExecuteAsync();
}));
}
protected override Task <bool> OnSketchCompleteAsync(Geometry geometry)
{
if (ActiveElementContainer == null)
{
Task.FromResult(true);
}
if (Module1.SelectedSymbol == null)
{
return(Task.FromResult(true));
}
return(QueuedTask.Run(() =>
{
var centerPt = ((Polygon)geometry).Extent.CenterCoordinate;
double circleArea = ((Polygon)geometry).Extent.Area;
double radius = Math.Sqrt(circleArea / Math.PI);
var circle = EllipticArcBuilderEx.CreateCircle(centerPt, radius, ArcOrientation.ArcClockwise);
List <Segment> circleSegments = new List <Segment>()
{
circle
};
var circlePolygon = PolygonBuilderEx.CreatePolygon(circleSegments);
var ge = ElementFactory.Instance.CreateTextGraphicElement
(this.ActiveElementContainer, TextType.CircleParagraph,
circlePolygon, Module1.SelectedSymbol as CIMTextSymbol, "Text"
);
//The new text graphic element has been created
//We now switch to Pro's out of box "esri_layouts_inlineEditTool"
//This will allow inline editing of the text
//This tool will work on graphics on both map view and layouts
FrameworkApplication.SetCurrentToolAsync("esri_layouts_inlineEditTool");
return true;
}));
}