public IGraphEdge GetGraphEdge(IPoint point, double tolerance)
{
if (point == null)
{
return(null);
}
SpatialFilter filter = new SpatialFilter();
filter.Geometry = new Envelope(point.X - tolerance, point.Y - tolerance,
point.X + tolerance, point.Y + tolerance);
filter.AddField("FDB_SHAPE");
filter.AddField("FDB_OID");
using (IFeatureCursor cursor = GetEdgeFeatures(filter))
{
IFeature feature, selected = null;
double selectedDist = double.MaxValue;
int selectedFcId = int.MinValue;
IPoint snappedPoint = null;
while ((feature = cursor.NextFeature) != null)
{
if (!(feature.Shape is IPolyline) ||
feature.FindField("NETWORK#FCID") == null)
{
continue;
}
int fcid = Convert.ToInt32(feature["NETWORK#FCID"]);
double dist, stat;
IPoint spoint = gView.Framework.SpatialAlgorithms.Algorithm.Point2PolylineDistance((IPolyline)feature.Shape, point, out dist, out stat);
if (spoint == null)
{
continue;
}
if (selected == null || dist <= selectedDist)
{
if (fcid != -1)
{
#region Do complex Edge exists
IFeatureClass complexEdgeFc = _edgeFcs[-1];
if (complexEdgeFc != null)
{
QueryFilter complexEdgeFilter = new QueryFilter();
complexEdgeFilter.WhereClause = "FCID=" + fcid + " AND OID=" + feature.OID;
complexEdgeFilter.AddField("FDB_OID");
using (IFeatureCursor complexEdgeCursor = complexEdgeFc.GetFeatures(complexEdgeFilter))
{
if (complexEdgeCursor.NextFeature != null)
{
continue;
}
}
}
#endregion
}
selected = feature;
selectedDist = dist;
selectedFcId = fcid;
snappedPoint = spoint;
}
}
if (selected == null)
{
return(null);
}
int eid = -1;
if (selectedFcId == -1)
{
#region Complex Edge
object eidObj = _fdb._conn.QuerySingleField("SELECT eid FROM " + _fdb.TableName("FC_" + _name + "_ComplexEdges") + " WHERE " + _fdb.DbColName("FDB_OID") + "=" + selected.OID, "eid");
if (eidObj != null)
{
eid = Convert.ToInt32(eidObj);
}
#endregion
}
else
{
object eidObj = _fdb._conn.QuerySingleField("SELECT eid FROM " + _fdb.TableName(_name + "_EdgeIndex") + " WHERE FCID=" + selectedFcId + " AND OID=" + selected.OID, "eid");
if (eidObj != null)
{
eid = Convert.ToInt32(eidObj);
}
}
if (eid != -1)
{
point.X = snappedPoint.X;
point.Y = snappedPoint.Y;
IGraphTableAdapter gt = this.GraphTableAdapter();
return(gt.QueryEdge(eid));
}
return(null);
}
}
public SQLiteFDBNetworkFeatureClass(SQLiteFDB fdb, IDataset dataset, string name, GeometryDef geomDef)
{
_fdb = fdb;
_fcid = _fdb.FeatureClassID(_fdb.DatasetID(dataset.DatasetName), name);
_dataset = dataset;
_geomDef = (geomDef != null) ? geomDef : new GeometryDef();
if (_geomDef != null && _geomDef.SpatialReference == null && dataset is IFeatureDataset)
{
_geomDef.SpatialReference = ((IFeatureDataset)dataset).SpatialReference;
}
_fields = new Fields();
_name = _aliasname = name;
IDatasetElement element = _dataset[_name + "_Nodes"];
if (element != null)
{
_nodeFc = element.Class as IFeatureClass;
}
element = _dataset[_name + "_ComplexEdges"];
if (element != null && element.Class is IFeatureClass)
{
_edgeFcs.Add(-1, (IFeatureClass)element.Class);
}
DataTable tab = _fdb.Select("FCID", "FDB_NetworkClasses", "NetworkId=" + _fcid);
if (tab != null && tab.Rows.Count > 0)
{
StringBuilder where = new StringBuilder();
where.Append("\"GeometryType\"=" + ((int)geometryType.Polyline).ToString() + " AND \"ID\" in(");
for (int i = 0; i < tab.Rows.Count; i++)
{
if (i > 0)
{
where.Append(",");
}
where.Append(tab.Rows[i]["FCID"].ToString());
}
where.Append(")");
tab = _fdb.Select("ID,Name", "FDB_FeatureClasses", where.ToString());
if (tab != null)
{
foreach (DataRow row in tab.Rows)
{
element = _dataset[row["name"].ToString()];
if (element != null && element.Class is IFeatureClass)
{
_edgeFcs.Add(Convert.ToInt32(row["id"]), element.Class as IFeatureClass);
}
}
}
}
_weights = _fdb.GraphWeights(name);
Dictionary <Guid, string> weightTableNames = null;
Dictionary <Guid, GraphWeightDataType> weightDataTypes = null;
if (_weights != null && _weights.Count > 0)
{
weightTableNames = new Dictionary <Guid, string>();
weightDataTypes = new Dictionary <Guid, GraphWeightDataType>();
foreach (IGraphWeight weight in _weights)
{
if (weight == null)
{
continue;
}
weightTableNames.Add(weight.Guid, _fdb.TableName(_name + "_Weights_" + weight.Guid.ToString("N").ToLower()));
weightDataTypes.Add(weight.Guid, weight.DataType);
}
}
_pageManager = new NetworkObjectSerializer.PageManager(
gView.Framework.Db.DataProvider.SQLiteProviderFactory,
_fdb.ConnectionString, _name,
_fdb.TableName("FC_" + _name),
_fdb.TableName(_name + "_Edges"),
_fdb.TableName("FC_" + name + "_Nodes"),
weightTableNames, weightDataTypes, _fdb
);
}
