public void propertyChange(PropertyChangeEvent ev) {
					String propertyName = ev.getPropertyName();
					if ("enabled".equals(propertyName)) {
						propertyChangeSupport.firePropertyChange(ev);
					} else {
						Object newValue = getValue(propertyName);
						if (newValue != null) {
							propertyChangeSupport
									.firePropertyChange(new PropertyChangeEvent(
											ev.getSource(), propertyName, ev
													.getOldValue(), newValue));
						}
					}
				}