| AboutEvent | Event sent when the application is asked to open its about window. | 
| AppEvent | AppEvents are sent to listeners and handlers installed on the
  Desktop instance of the current desktop context. | 
| AppForegroundEvent | Event sent when the application has become the foreground app, and when it is
 no longer the foreground app. | 
| AppHiddenEvent | Event sent when the application has been hidden or shown. | 
| AppReopenedEvent | Event sent when the application is asked to re-open itself. | 
| FilesEvent | Auxiliary event containing a list of files. | 
| OpenFilesEvent | Event sent when the app is asked to open a list of files. | 
| OpenURIEvent | Event sent when the app is asked to open a URI. | 
| PreferencesEvent | Event sent when the application is asked to open its preferences window. | 
| PrintFilesEvent | Event sent when the app is asked to print a list of files. | 
| QuitEvent | Event sent when the application is asked to quit. | 
| QuitResponse | Used to respond to a request to quit the application. | 
| QuitStrategy | The strategy used to shut down the application, if Sudden Termination is not enabled. | 
| ScreenSleepEvent | Event sent when the displays attached to the system enter and exit power save
 sleep. | 
| SystemEventListener | Common interface for all event listener sub-types. | 
| SystemSleepEvent | Event sent when the system enters and exits power save sleep. | 
| UserSessionEvent | Event sent when the user session has been changed. | 
| UserSessionEvent.Reason | Kinds of available reasons of user session change. |