public void Draw(IDisplay disp, IFeature feature)
{
if (feature?.Shape != null)
{
if (_aggregateGeometry == null)
{
_aggregateGeometry = new AggregateGeometry();
}
_aggregateGeometry.AddGeometry(feature.Shape);
}
}
private static void WriteGeometryCollection(IAggregateGeometry aGeometry, BinaryWriter writer, WkbByteOrder byteOrder)
{
WriteUInt32((uint)aGeometry.GeometryCount, writer, byteOrder);
for (int i = 0; i < aGeometry.GeometryCount; i++)
{
IGeometry geometry = aGeometry[i];
if (geometry == null)
{
continue;
}
if (geometry is IPoint)
{
writer.Write((uint)WKBGeometryType.wkbPoint);
WritePoint((IPoint)geometry, writer, byteOrder);
}
else if (geometry is IMultiPoint)
{
writer.Write((uint)WKBGeometryType.wkbMultiPoint);
WriteMultiPoint((IMultiPoint)geometry, writer, byteOrder);
}
else if (geometry is IPolyline)
{
writer.Write((uint)WKBGeometryType.wkbMultiLineString);
WriteMultiLineString((IPolyline)geometry, writer, byteOrder);
}
else if (geometry is IPolygon)
{
writer.Write((uint)WKBGeometryType.wkbMultiPolygon);
WriteMultiPolygon((IPolygon)geometry, writer, byteOrder);
}
else if (geometry is IAggregateGeometry)
{
writer.Write((uint)WKBGeometryType.wkbGeometryCollection);
WriteGeometryCollection((IAggregateGeometry)geometry, writer, byteOrder);
}
else
{
throw new NotSupportedException("Geometry type is not supported");
}
}
}
public PersistableAggregateGeometry(IAggregateGeometry ageometry)
{
_ageometry = ageometry;
}
public void FinishDrawing(IDisplay disp, ICancelTracker cancelTracker)
{
if (cancelTracker == null)
{
cancelTracker = new CancelTracker();
}
try
{
if (cancelTracker.Continue)
{
// also draw empty aggregates (a MUST for PoygonMask!!)
if (_aggregateGeometry == null)
{
_aggregateGeometry = new AggregateGeometry();
}
if (_symbol is ISymbolCollection)
{
ISymbolCollection sColl = (ISymbolCollection)_symbol;
foreach (ISymbolCollectionItem symbolItem in sColl.Symbols)
{
if (symbolItem.Visible == false || symbolItem.Symbol == null)
{
continue;
}
ISymbol symbol = symbolItem.Symbol;
if (symbol.SupportsGeometryType(geometryType.Aggregate))
{
disp.Draw(symbol, _aggregateGeometry);
}
else
{
for (int g = 0; g < _aggregateGeometry.GeometryCount; g++)
{
disp.Draw(symbol, _aggregateGeometry[g]);
}
}
}
}
else
{
if (_symbol.SupportsGeometryType(geometryType.Aggregate))
{
disp.Draw(_symbol, _aggregateGeometry);
}
else
{
for (int g = 0; g < _aggregateGeometry.GeometryCount; g++)
{
disp.Draw(_symbol, _aggregateGeometry[g]);
}
}
}
}
}
finally
{
_aggregateGeometry = null;
}
}
