void (PropertyChangeEvent evt) { if (!"ancestor".equals(evt.getPropertyName())) { return; } // Configure the balloon to show on initial configurable drawing. myShowBalloonIfNecessary = evt.getNewValue() != null && evt.getOldValue() == null; if (evt.getNewValue() == null && evt.getOldValue() != null) { // Cancel delayed balloons when the configurable is hidden. myAlarm.cancelAllRequests(); } }