Index: src/providers/osm/osmprovider.h
===================================================================
--- src/providers/osm/osmprovider.h	(Revision 15229)
+++ src/providers/osm/osmprovider.h	(Arbeitskopie)
@@ -193,13 +193,6 @@
     virtual void rewind();
 
     /**
-     * Changes attribute values of existing features.
-     * @param attr_map a map containing changed attributes
-     * @return true in case of success and false in case of failure
-     */
-    virtual bool changeAttributeValues( const QgsChangedAttributesMap & attr_map );
-
-    /**
      * Returns a bitmask containing the supported capabilities
      * Note, some capabilities may change depending on whether
      * a spatial filter is active on this provider, so it may
@@ -235,6 +228,8 @@
      */
     virtual QgsCoordinateReferenceSystem crs();
 
+  public slots:
+    virtual void setRenderer( QgsVectorLayer *layer );
 
   private:
     /**
Index: src/providers/osm/osmprovider.cpp
===================================================================
--- src/providers/osm/osmprovider.cpp	(Revision 15229)
+++ src/providers/osm/osmprovider.cpp	(Arbeitskopie)
@@ -981,23 +981,6 @@
 }
 
 
-bool QgsOSMDataProvider::changeAttributeValues( const QgsChangedAttributesMap & attr_map )
-{
-  QgsDebugMsg( QString( "In changeAttributeValues(...)." ) );
-
-  // VERY VERY ugly hack to assign custom renderer for OSM layer
-  // but probably there's no simple way how to set our custom renderer from python plugin
-  if ( attr_map.contains( 0x12345678 ) )
-  {
-    const QgsAttributeMap& x = attr_map.value( 0x12345678 );
-    QgsVectorLayer* layer = ( QgsVectorLayer* ) x.value( 0 ).toUInt();
-    QgsDebugMsg( "SETTING CUSTOM RENDERER!" );
-    layer->setRenderer( new OsmRenderer( layer->geometryType(), mStyleFileName ) );
-  }
-  return true;
-}
-
-
 int QgsOSMDataProvider::capabilities() const
 {
   return QgsVectorDataProvider::SelectAtId | QgsVectorDataProvider::SelectGeometryAtId;
@@ -1682,4 +1665,7 @@
   return true;
 };
 
-
+void QgsOSMDataProvider::setRenderer( QgsVectorLayer *layer )
+{
+  layer->setRenderer( new OsmRenderer( layer->geometryType(), mStyleFileName ) );
+}
\ No newline at end of file
Index: python/plugins/osm/OsmLoadDlg.py
===================================================================
--- python/plugins/osm/OsmLoadDlg.py	(Revision 15229)
+++ python/plugins/osm/OsmLoadDlg.py	(Arbeitskopie)
@@ -224,17 +224,15 @@
 
     def setCustomRenderer(self, layer):
         """Function provides a way how to set custom renderer.
-
-        For more check changeAttributeValues() implementation of OSM provider.
-
-        @param layer point to QGIS vector layer
+        @param layer pointer to QGIS vector layer
         """
 
-        import sip
-        layerAddr = sip.unwrapinstance(layer)
-        layer.dataProvider().changeAttributeValues( { 0x12345678 : { 0 : QVariant(layerAddr) } } )
+        if QObject.connect( self, SIGNAL( "setRenderer(QgsVectorLayer *)" ), layer.dataProvider(), SLOT( "setRenderer( QgsVectorLayer * )" ) ):
+          self.emit( SIGNAL( "setRenderer(QgsVectorLayer *)" ), layer )
+          QObject.disconnect( self, SIGNAL( "setRenderer(QgsVectorLayer *)" ), layer.dataProvider(), SLOT( "setRenderer( QgsVectorLayer * )" ) )
+        else:
+          QMessageBox.information(self, "OSM Load", QString("Could not connect to setRenderer signal."))
 
-
     def filesLoaded(self):
         """Function returns list of keys of all currently loaded vector layers.
         Note that names are not absolute and not unique.