Sets whether or not the grid rows should be rendered when drawing the \
        grid.
        
        :param      state | <bool>

def setShowGridRows( self, state ):
        """
        Sets whether or not the grid rows should be rendered when drawing the \
        grid.
        
        :param      state | <bool>
        """
        delegate = self.itemDelegate()
        if ( isinstance(delegate, XTreeWidgetDelegate) ):
            delegate.setShowGridRows(state)