Gtk.PrintOperationResult
A value of this type is returned by Gtk.PrintOperation.prototype.run.
- PrintOperationResult.ERROR
- An error has occured. 
- PrintOperationResult.APPLY
- The print settings should be stored. 
- PrintOperationResult.CANCEL
- The print operation has been canceled, the print settings should not be stored. 
- PrintOperationResult.IN_PROGRESS
- The print operation is not complete yet. This value will only be returned when running asynchronously.