public IGeometry GetSelectionBuffer()
{
IGeometry selectionBuffer = null;
if (_appState.Action == Action.FindAllWithin && !String.IsNullOrEmpty(_appState.Proximity))
{
Configuration config = AppContext.GetConfiguration();
Configuration.ProximityRow proximity = config.Proximity.FindByProximityID(_appState.Proximity);
if (proximity.Distance > 0)
{
DataTable table = GetFeatures(FeatureType.Selection);
if (table != null && table.Rows.Count > 0)
{
IGeometry selectionShape = MergeShapes(table);
selectionBuffer = selectionShape.Buffer(proximity.Distance);
}
}
}
return(selectionBuffer);
}
public bool SelectTargets()
{
if (String.IsNullOrEmpty(_appState.TargetLayer) || String.IsNullOrEmpty(_appState.SelectionLayer))
{
return(false);
}
_appState.TargetIds.Clear();
if (_appState.SelectionIds.Count == 0)
{
return(false);
}
Configuration config = AppContext.GetConfiguration();
Configuration.LayerRow targetLayerRow = config.Layer.FindByLayerID(_appState.TargetLayer);
CommonDataFrame dataFrame = AppContext.GetDataFrame(_appState.MapTab);
CommonLayer targetLayer = dataFrame.Layers.FirstOrDefault(lyr => String.Compare(lyr.Name, targetLayerRow.LayerName, true) == 0);
CommonField keyField = targetLayer.FindField(targetLayerRow.KeyField);
DataTable targetTable = null;
string filter = "";
string sort = "";
bool truncated = false;
IGeometry selectionShape;
switch (_appState.Action)
{
case Action.FindAllWithin:
Configuration.ProximityRow proximity = config.Proximity.FindByProximityID(_appState.Proximity);
targetTable = GetFeatures(FeatureType.Selection);
if (targetTable.Rows.Count > 0)
{
selectionShape = MergeShapes(targetTable);
if (proximity.Distance > 0)
{
selectionShape = selectionShape.Buffer(proximity.Distance);
}
targetTable = targetLayer.GetFeatureTable(String.Format("{0},{1}", targetLayer.GeometryField.Name, keyField.Name), selectionShape);
}
break;
case Action.FindNearest1:
case Action.FindNearest2:
case Action.FindNearest3:
case Action.FindNearest4:
case Action.FindNearest5:
Envelope extent = config.Application.FindByApplicationID(_appState.Application).GetFullExtentEnvelope();
double minDist = targetLayerRow.IsMinNearestDistanceNull() ? 100 : targetLayerRow.MinNearestDistance;
double maxDist = targetLayerRow.IsMaxNearestDistanceNull() ? Math.Max(extent.Width, extent.Height) : targetLayerRow.MaxNearestDistance;
int count = Convert.ToInt32(Enum.GetName(typeof(Action), _appState.Action).Substring(11));
targetTable = GetFeatures(FeatureType.Selection);
if (targetTable.Rows.Count > 0)
{
selectionShape = MergeShapes(targetTable);
double distance = minDist;
do
{
targetTable = targetLayer.GetFeatureTable(String.Format("{0},{1}", targetLayer.GeometryField.Name, keyField.Name), selectionShape.Buffer(distance));
distance *= 1.414213562;
}while ((targetTable == null || targetTable.Rows.Count < count) && distance < maxDist);
if (targetTable != null)
{
targetTable.Columns.Add("Distance", typeof(double));
targetTable.Columns.Add("Index", typeof(int));
filter = "Index <= " + count.ToString();
sort = "Index";
DataColumn targetShapeColumn = targetTable.Columns.Cast <DataColumn>().First(c => c.DataType.IsSubclassOf(typeof(Geometry)));
int targetDistanceColumn = targetTable.Columns.IndexOf("Distance");
DataTable selectionTable = GetFeatures(FeatureType.Selection);
DataColumn selectionShapeColumn = selectionTable.Columns.Cast <DataColumn>().First(c => c.DataType.IsSubclassOf(typeof(Geometry)));
foreach (DataRow selectionRow in selectionTable.Rows)
{
selectionShape = (Geometry)selectionRow[selectionShapeColumn];
foreach (DataRow targetRow in targetTable.Rows)
{
double d = selectionShape.Distance((Geometry)targetRow[targetShapeColumn]);
if (targetRow.IsNull(targetDistanceColumn))
{
targetRow[targetDistanceColumn] = d;
}
else
{
targetRow[targetDistanceColumn] = Math.Min((double)targetRow[targetDistanceColumn], d);
}
}
}
DataRow[] targetRows = targetTable.Select("", "Distance");
for (int i = 0; i < targetRows.Length; ++i)
{
targetRows[i]["Index"] = i + 1;
}
}
}
break;
}
if (targetTable != null)
{
int maxTargets = targetLayerRow.IsMaxNumberSelectedNull() ? Int32.MaxValue : targetLayerRow.MaxNumberSelected;
int c = targetTable.Columns.IndexOf(keyField.Name);
foreach (DataRow row in targetTable.Select(filter, sort))
{
if (!row.IsNull(c))
{
if (_appState.TargetIds.Count == maxTargets)
{
truncated = true;
break;
}
_appState.TargetIds.Add(row[c].ToString());
}
}
}
return(truncated);
}
