ArcGIS Pro二次开发-根据屏幕几个像素创建要素
/// <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 = EllipticArcBuilder.CreateEllipticArcSegment(cent, searchRadius, esriArcOrientation.esriArcClockwise, MapView.Active.Map.SpatialReference); var searchPB = new PolygonBuilder(new[] { searchGeom }); return searchPB.ToGeometry(); }