code: def setup_size(self, width, height):
          
          self._iconw = max(0, width - 7)
          self._iconh = max(0, height - 6)
          self.update_all_buttons()
docs: Set the width and height for one cell in the tooltip
  
          This is inderectly acomplished by setting the iconsizes for the buttons.
  
          :param width: the width of one cell, min. is 7 -> icon width = 0
          :type width: int
          :param height: the height of one cell, min. is 6 -> icon height = 0
          :type height: int
          :returns: None
          :rtype: None
          :raises: None