+ /// \return selected direction
+ boost::shared_ptr<GeomAPI_Dir> setSketchPlane(const TopoDS_Shape& theShape);
+
+ /// Called on selection changed when the operation is active
+ virtual void selectionChanged(ModuleBase_ISelection* theSelection);
+
+ /// If operation needs to redisplay its result during operation
+ /// then this method has to return True
+ virtual bool hasPreview() const { return false; }