The "toggled" signal is
emitted when the toggled()
method is called. This is called internally when the
GtkCheckMenuItem's
"activate" signal is emitted
- that is, when a user clicks on the menu item or presses the
Enter or Space key while the item
is selected. The signal is also emitted when calling the
set_active() method.
Note that the state-switching triggered by activation is not
directly related to the
"toggled" signal.
