'Test whether the artist contains the mouse event.
Returns the truth value and a dictionary of artist specific details of
selection, such as which points are contained in the pick radius.  See
individual artists for details.'

def contains(self, mouseevent):

    if callable(self._contains):
        return self._contains(self, mouseevent)
    warnings.warn((u"'%s'    needs    'contains'    method" % self.__class__.__name__))
    return (False, {})
