+ /// Called on change of any argument-attribute of this object
+ /// \param theID identifier of changed attribute
+ SKETCHPLUGIN_EXPORT virtual void attributeChanged(const std::string& theID);
+
+ /// Returns the current distance between the feature attributes
+ double calculateCurrentDistance();
+
+ /// Customize presentation of the feature
+ virtual bool customisePresentation(ResultPtr theResult, AISObjectPtr thePrs,
+ std::shared_ptr<GeomAPI_ICustomPrs> theDefaultPrs);
+