(self, *args, **kwargs)
Hook for vertical scrolling for sub-classes to override.
Hook for vertical scrolling for sub-classes to override.
Hook for vertical scrolling for sub - classes to override .
def yscroll_event(self, *args, **kwargs):
        """Hook for vertical scrolling for sub-classes to override."""
        raise NotImplementedError
def yscroll_event ( self , * args , * * kwargs ) : raise NotImplementedError