Text font choice event handler

def OnTextFont(self, event):
        """Text font choice event handler"""

        fontchoice_combobox = event.GetEventObject()
        idx = event.GetInt()

        try:
            font_string = fontchoice_combobox.GetString(idx)
        except AttributeError:
            font_string = event.GetString()

        post_command_event(self, self.FontMsg, font=font_string)