def _update_font_weight(self, font_weight):
        """Updates font weight widget

        Parameters
        ----------

        font_weight: Integer
        \tButton down iif font_weight == wx.FONTWEIGHT_BOLD

        """

        toggle_state = font_weight & wx.FONTWEIGHT_BOLD == wx.FONTWEIGHT_BOLD

        self.ToggleTool(wx.FONTFLAG_BOLD, toggle_state)