// p r i v a t e
// ------------------------------------------------------------------------
private void addSystemTray() {
if (SystemTray.isSupported()) {
if (null == _trayicon) {
_trayicon = new AppTray(AniBusyApp.getIdleIcon());
_trayicon.addListener(_listener);
} else {
//-- remove trayicon from system tray --//
this.removeSystemTray();
}