| class  | AboutEvent | Event sent when the application is asked to open its about window. | 
| class  | AppForegroundEvent | Event sent when the application has become the foreground app, and when it is
 no longer the foreground app. | 
| class  | AppHiddenEvent | Event sent when the application has been hidden or shown. | 
| class  | AppReopenedEvent | Event sent when the application is asked to re-open itself. | 
| class  | FilesEvent | Auxiliary event containing a list of files. | 
| class  | OpenFilesEvent | Event sent when the app is asked to open a list of files. | 
| class  | OpenURIEvent | Event sent when the app is asked to open a URI. | 
| class  | PreferencesEvent | Event sent when the application is asked to open its preferences window. | 
| class  | PrintFilesEvent | Event sent when the app is asked to print a list of files. | 
| class  | QuitEvent | Event sent when the application is asked to quit. | 
| class  | ScreenSleepEvent | Event sent when the displays attached to the system enter and exit power save
 sleep. | 
| class  | SystemSleepEvent | Event sent when the system enters and exits power save sleep. | 
| class  | UserSessionEvent | Event sent when the user session has been changed. |