ArcMapAddinDistanceAndDirection.ViewModels.RangeViewModel.OnNewMapPointEvent C# (CSharp) Метод

        internal override void OnNewMapPointEvent(object obj)
        {
            // only if we are the active tab
            if (!IsActiveTab)
                return;

            var point = obj as IPoint;

            if (point == null)
                return;

            if (!IsInteractive)
            {
                Point1 = point;
                HasPoint1 = true;

                ClearTempGraphics();
                var color = new RgbColorClass() { Green = 255 } as IColor;
                AddGraphicToMap(Point1, color, true);

                // Reset formatted string
                Point1Formatted = string.Empty;
            }
            else
            {
                // we are in interactive mode
                if (!HasPoint1)
                {
                    Point1 = point;
                    HasPoint1 = true;

                    ClearTempGraphics();
                    var color = new RgbColorClass() { Green = 255 } as IColor;
                    AddGraphicToMap(Point1, color, true);

                    // Reset formatted string
                    Point1Formatted = string.Empty;
                }
                else
                {
                    // update Distance
                    var polyline = GetGeoPolylineFromPoints(Point1, point);
                    UpdateDistance(polyline);

                    // draw a geo ring
                    ConstructGeoCircle();
                }
            }
        }