public void OnEvent(object MapEvent)
{
if (_module == null ||
_module.SelectedNetworkFeatureClass == null ||
!(MapEvent is MapEventClick))
{
return;
}
MapEventClick ev = (MapEventClick)MapEvent;
Point p = new Point(ev.x, ev.y);
double tol = 5 * ((IDisplay)ev.Map).mapScale / (96 / 0.0254); // [m]
_module.RemoveNetworkStartGraphicElement((IDisplay)ev.Map);
IGraphEdge graphEdge = _module.SelectedNetworkFeatureClass.GetGraphEdge(p, tol);
if (graphEdge != null)
{
_module.StartEdgeIndex = graphEdge.Eid;
((IDisplay)ev.Map).GraphicsContainer.Elements.Add(new GraphicStartPoint(p));
_module.StartPoint = p;
}
((MapEvent)MapEvent).drawPhase = DrawPhase.Graphics;
((MapEvent)MapEvent).refreshMap = true;
}
async public Task <bool> OnEvent(object MapEvent)
{
if (_module == null ||
_module.SelectedNetworkFeatureClass == null ||
!(MapEvent is MapEventClick))
{
return(false);
}
MapEventClick ev = (MapEventClick)MapEvent;
Point p = new Point(ev.x, ev.y);
double tol = 5 * ((IDisplay)ev.Map).mapScale / (96 / 0.0254); // [m]
Envelope env = new Envelope(ev.x - tol, ev.y - tol, ev.x + tol, ev.y + tol);
SpatialFilter filter = new SpatialFilter();
filter.Geometry = env;
filter.FeatureSpatialReference = ((IDisplay)ev.Map).SpatialReference;
filter.FilterSpatialReference = ((IDisplay)ev.Map).SpatialReference;
filter.AddField("FDB_SHAPE");
filter.AddField("FDB_OID");
double dist = double.MaxValue;
int n1 = -1;
IPoint p1 = null;
IFeatureCursor cursor = await _module.SelectedNetworkFeatureClass.GetNodeFeatures(filter);
IFeature feature;
while ((feature = await cursor.NextFeature()) != null)
{
double d = p.Distance(feature.Shape as IPoint);
if (d < dist)
{
dist = d;
n1 = feature.OID;
p1 = feature.Shape as IPoint;
}
}
_module.RemoveNetworkStartGraphicElement((IDisplay)ev.Map);
if (n1 != -1)
{
_module.StartNodeIndex = n1;
}
if (p1 != null)
{
((IDisplay)ev.Map).GraphicsContainer.Elements.Add(new GraphicStartPoint(p1));
_module.StartPoint = p1;
}
((MapEvent)MapEvent).drawPhase = DrawPhase.Graphics;
((MapEvent)MapEvent).refreshMap = true;
return(true);
}