application-file-handler in System Menus

When the current eventspace is the initial eventspace, this procedure retrieves or installs a procedure that is called under Mac OS X and Windows when the application is running and user double-clicks an application-handled file or drags a file onto the application's icon. The procedure is always called in the initial eventspace's handler thread (as a callback), and the argument is a filename.

The default handler queues a callback to the on-drop-file method of the most-recently activated frame in the main eventspace, if drag-and-drop is enabled for that frame.

When the application is not running and user double-clicks an application-handled file or drags a file onto the application's icon, the filename is provided as a command-line argument to the application.

• (application-file-handler) -> procedure of one argument: a path

  If the current eventspace is the initial eventspace, returns the current handler, otherwise returns void.

  
  

• (application-file-handler handler-proc) -> void
     handler-proc : procedure of one argument: a path

  If the current eventspace is the initial eventspace, sets the current handler, otherwise does nothing.