final Locale locale = parameterContext.getResourceBundleFactory().getLocale();
final TimeZone timeZone = parameterContext.getResourceBundleFactory().getTimeZone();
sdf = createDateFormat(formatString, locale, timeZone);
dateChooserPanel = new DateChooserPanel(Calendar.getInstance(), true);
dateChooserPanel.addPropertyChangeListener(DateChooserPanel.PROPERTY_DATE, new InternalDateUpdateHandler());
dateField = new JTextField();
dateField.setColumns(20);