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The "activate-item" signal is fired when activate_item() is called from a GtkMenuShell object. It is used internally in order to provide an indirect means of firing the "activate" signal.

If you have called the activate_item() method, you will need to connect() the appropriate GtkMenuItem to the "activate" signal.

Callback function

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For authoritative source of the documentation, please refer to http://gtk.php.net/docs.php