QgsAbstractGeometry* QgsMultiPolygonV2::boundary() const
{
QgsMultiLineString* multiLine = new QgsMultiLineString();
for ( int i = 0; i < mGeometries.size(); ++i )
{
if ( QgsPolygonV2* polygon = dynamic_cast<QgsPolygonV2*>( mGeometries.at( i ) ) )
{
QgsAbstractGeometry* polygonBoundary = polygon->boundary();
if ( QgsLineString* lineStringBoundary = dynamic_cast< QgsLineString* >( polygonBoundary ) )
{
multiLine->addGeometry( lineStringBoundary );
}
else if ( QgsMultiLineString* multiLineStringBoundary = dynamic_cast< QgsMultiLineString* >( polygonBoundary ) )
{
for ( int j = 0; j < multiLineStringBoundary->numGeometries(); ++j )
{
multiLine->addGeometry( multiLineStringBoundary->geometryN( j )->clone() );
}
delete multiLineStringBoundary;
}
else
{
delete polygonBoundary;
}
}
}
if ( multiLine->numGeometries() == 0 )
{
delete multiLine;
return nullptr;
}
return multiLine;
}
QgsAbstractGeometry *QgsPolygonV2::boundary() const
{
if ( !mExteriorRing )
return nullptr;
if ( mInteriorRings.isEmpty() )
{
return mExteriorRing->clone();
}
else
{
QgsMultiLineString *multiLine = new QgsMultiLineString();
multiLine->addGeometry( mExteriorRing->clone() );
int nInteriorRings = mInteriorRings.size();
for ( int i = 0; i < nInteriorRings; ++i )
{
multiLine->addGeometry( mInteriorRings.at( i )->clone() );
}
return multiLine;
}
}
