private Task <Tuple <IDisposable, long> > AddFeatureToOverlay(MapViewMouseEventArgs e)
{
return(QueuedTask.Run(() => {
double llx = e.ClientPoint.X - 3;
double lly = e.ClientPoint.Y - 3;
double urx = e.ClientPoint.X + 3;
double ury = e.ClientPoint.Y + 3;
EnvelopeBuilder envBuilder = new EnvelopeBuilder(ActiveMapView.ClientToMap(new Point(llx, lly)),
ActiveMapView.ClientToMap(new Point(urx, ury)));
MapPoint mp = ActiveMapView.ClientToMap(e.ClientPoint);
var cursor = _trees.Search(new SpatialQueryFilter()
{
FilterGeometry = envBuilder.ToGeometry(), SpatialRelationship = SpatialRelationship.Intersects
});
if (cursor.MoveNext())
{
return new Tuple <IDisposable, long>(
ActiveMapView.AddOverlay(ActiveMapView.ClientToMap(e.ClientPoint),
_overlaySymbol.MakeSymbolReference()),
cursor.Current.GetObjectID());
}
//var select = _trees.Select(new SpatialQueryFilter() {
// FilterGeometry = envBuilder.ToGeometry(),
// SpatialRelationship = SpatialRelationship.Intersects
//});
//if (select.GetCount() > 0) {
// return ActiveMapView.AddOverlay(ActiveMapView.ClientToMap(e.ClientPoint), _overlaySymbol.MakeSymbolReference());
//}
return new Tuple <IDisposable, long>(null, -1);
}));
}