/** * This method gets called when a bound property is changed. * * @param e A <code>PropertyChangeEvent</code> object describing the event source and the * property that has changed. Must not be null. * @throws NullPointerException if the parameter is null. * @since 1.5 */ public void propertyChange(PropertyChangeEvent e) { String propertyName = e.getPropertyName(); if (propertyName == "visible") { if (e.getOldValue() == Boolean.FALSE && e.getNewValue() == Boolean.TRUE) { handlePopupIsVisibleEvent(true); } else if (e.getOldValue() == Boolean.TRUE && e.getNewValue() == Boolean.FALSE) { handlePopupIsVisibleEvent(false); } } }