#NEWLINE# def initContactAddRemoveButtons( self ) : #NEWLINE# #INDENT# newItem = Button ( '+' ) #NEWLINE# newItem . addCallback ( onNew , ClickEvent , self ) #NEWLINE# self . _bottomLeftCorner . addComponent ( newItem ) #NEWLINE# self . _contactRemovalButton = Button ( '-' ) #NEWLINE# self . _contactRemovalButton . addCallback ( onRemove , ClickEvent , newItem ) #NEWLINE# self . _contactRemovalButton . setVisible ( False ) #NEWLINE# self . _bottomLeftCorner . addComponent ( self . _contactRemovalButton )