gio:application-mark-busy (application)

application -- a g:application instance

Increases the busy count of the application. Use this function to indicate that the application is busy, for instance while a long running operation is pending. The busy state will be exposed to other processes, so a session shell will use that information to indicate the state to the user, for example, with a spinner. To cancel the busy indication, use the g:application-unmark-busy function.