Sets our main struct and passes it to the parent class.
Create a custom action that calls the given @callback when activated.
Get the main Gtk struct
the main Gtk struct as a void*
the main Gtk struct
the main Gtk struct
Get the main Gtk struct
the main Gtk struct as a void*
Activates the action on the @widget with the given @args.
Prints the given action into a string for the developer.
Prints the given action into a human-readable string.
A GtkShortcutAction that invokes a callback.