QgsGeometry::asCollection works also for single-part geometries

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@10034 c8812cc2-4d05-0410-92ff-de0c093fc19c

python/core/qgsgeometry.sip

@@ -278,7 +278,8 @@ not disjoint with existing polygons of the feature*/
 
     /** return contents of the geometry as a list of geometries
      @note added in version 1.1 */
-    QList<QgsGeometry*> asGeometryCollection();
+    // TODO: destruction of created geometries??
+    QList<QgsGeometry*> asGeometryCollection() /Factory/;
 
 }; // class QgsGeometry
 

src/core/qgsgeometry.cpp

@@ -5457,20 +5457,21 @@ QList<QgsGeometry*> QgsGeometry::asGeometryCollection()
   int type = GEOSGeomTypeId( mGeos );
   QgsDebugMsg("geom type: "+QString::number(type));
 
+  QList<QgsGeometry*> geomCollection;
+
   if ( type != GEOS_MULTIPOINT &&
        type != GEOS_MULTILINESTRING &&
        type != GEOS_MULTIPOLYGON &&
        type != GEOS_GEOMETRYCOLLECTION )
   {
-    // we have a single-part geometry
-    return QList<QgsGeometry*>();
+    // we have a single-part geometry - put there a copy of this one
+    geomCollection.append( new QgsGeometry(*this) );
+    return geomCollection;
   }
 
   int count = GEOSGetNumGeometries( mGeos );
   QgsDebugMsg("geom count: "+QString::number(count));
 
-  QList<QgsGeometry*> geomCollection;
-
   for ( int i = 0; i < count; ++i )
   {
     const GEOSGeometry * geometry = GEOSGetGeometryN( mGeos, i );