Sets the page size for this widget.  If the page size is set to -1,
        then there is no sizing and all records are displayed.
        
        :return     <int>

def setPageSize(self, pageSize):
        """
        Sets the page size for this widget.  If the page size is set to -1,
        then there is no sizing and all records are displayed.
        
        :return     <int>
        """
        if pageSize == self._pageSize:
            return
        
        self._pageSize = pageSize
        self.setPaged(pageSize > 0)