bool QgsMemoryProvider::changeAttributeValues( const QgsChangedAttributesMap & attr_map ) { for ( QgsChangedAttributesMap::const_iterator it = attr_map.begin(); it != attr_map.end(); ++it ) { QgsFeatureMap::iterator fit = mFeatures.find( it.key() ); if ( fit == mFeatures.end() ) continue; const QgsAttributeMap& attrs = it.value(); for ( QgsAttributeMap::const_iterator it2 = attrs.begin(); it2 != attrs.end(); ++it2 ) fit->setAttribute( it2.key(), it2.value() ); } return true; }