Swing/ProgressStringAlignment のバックアップ(No.14)

class StringAlignmentProgressBar extends JProgressBar {
  private final JLabel label;
  // private transient ChangeListener changeListener;

  protected StringAlignmentProgressBar(BoundedRangeModel model, int horizAlignment) {
    super(model);
    label = new JLabel(" ", horizAlignment);
  }

  @Override public void updateUI() {
    removeAll();
    // removeChangeListener(changeListener);
    super.updateUI();
    setLayout(new BorderLayout());
    // changeListener = e -> label.setText(getString());
    // addChangeListener(changeListener);
    EventQueue.invokeLater(() -> {
      add(label);
      label.setBorder(BorderFactory.createEmptyBorder(0, 4, 0, 4));
    });
  }

  @Override protected ChangeListener createChangeListener() {
    return e -> label.setText(getString());
  }
}