public JComboBox<Object> addComboBox(
			Object[] vals,
			Object preselected,
			int gridx, 
			int gridy,
			int gridw
		)
	{
		updateGridCoords(gridx,gridy,gridw);
		
		JComboBox<Object> cb = null;
		
		if( vals == null )
			cb = new JComboBox<Object>();
		else	
			cb = new JComboBox<Object>(vals);
		
		Dimension d = cb.getPreferredSize();
		d.height = DEFAULT_COMPONENT_HEIGHT-2;
		cb.setPreferredSize(d);
		
		parent.add(cb, this.gbc);
		
		if( vals != null 
				&& preselected != null )
			cb.setSelectedItem(preselected); 
		
		return cb;
	}