Updates the drop shadow effect for this widget on enable/disable
        state change.
        
        :param      state | <bool>

def setEnabled(self, state):
        """
        Updates the drop shadow effect for this widget on enable/disable
        state change.
        
        :param      state | <bool>
        """
        super(XToolButton, self).setEnabled(state)
        
        self.updateUi()