| little more sophisticated parent mode 
        
            | Methods |  |  
        | __init__ enter_object
 leave_object
 on_paper_switch
 
 |  
            |  | __init__ |  
        | 
__init__ ( self )
 |  
            |  | enter_object |  
        | 
enter_object (
        self,
        object,
        event,
        )
 |  
            |  | leave_object |  
        | 
leave_object ( self,  event )
 |  
            |  | on_paper_switch |  
        | 
on_paper_switch (
        self,
        old_paper,
        new_paper,
        )
called when paper is switched |  |