descriptor = Activator.getImageDescriptor("/icons/volumeup_16.png"); //$NON-NLS-1$
_volumeUpImage = descriptor.createImage();
descriptor = Activator.getImageDescriptor("/icons/volumemute_16.png"); //$NON-NLS-1$
_volumeMuteImage = descriptor.createImage();
Controller.getInstance().getPreferenceStore().addPropertyChangeListener(new IPropertyChangeListener() {
private boolean isTrayProperty(PropertyChangeEvent event) {
String property = event.getProperty();
return (property.equals(PreferenceConstants.TRAY_SHOW_IN_TRAY)) ||
(property.equals(PreferenceConstants.TRAY_SHOW_REVERSED)) ||
(property.equals(PreferenceConstants.TRAY_SHOW_NEXT_BUTTON)) ||