The notify signal is emitted on an object when one of its properties has its value set through
g_object_set(), et al.
Note that getting this signal doesn’t itself guarantee that the value of the property has actually changed. When it is emitted is determined by the derived GObject class. If the implementor did not create the property with
G_PARAM_EXPLICIT_NOTIFY, then any call to
notifybeing emitted, even if the new value is the same as the old. If they did pass
G_PARAM_EXPLICIT_NOTIFY, then this signal is emitted only when they explicitly call
g_object_notify_by_pspec(), and common practice is to do that only when the value has actually changed.
This signal is typically used to obtain change notification for a single property, by specifying the property name as a detail in the
g_signal_connect()call, like this: (C Language Example):
g_signal_connect (text_view->buffer, "notify::paste-target-list", G_CALLBACK (gtk_text_view_target_list_notify), text_view)
It is important to note that you must use canonical parameter names as detail strings for the notify signal.
case notify = "notify"