#NEWLINE# def _contour_changed( self , old , new ) : #NEWLINE# #INDENT# if ( old is not None ) : #NEWLINE# #INDENT# old . on_trait_change ( old . _filled_contours_changed , 'filled_contours' , remove = True ) #NEWLINE# #UNINDENT# new . on_trait_change ( self . _filled_contours_changed , 'filled_contours' ) #NEWLINE# self . _change_components ( old , new )