@Override
      public Dimension getPreferredSize() {
        final Dimension size = super.getPreferredSize();
        if (myWidth == null) {
          myWidth = 10;
          final FontMetrics fm = getFontMetrics(getFont());
          for (JLabel confLabel : map.values()) {
            String text = confLabel.getText();
            myWidth += fm.stringWidth(text + "W");
          }
        }
        return new Dimension(myWidth, size.height);
      }
@Override
      public Dimension getPreferredSize()