notify

The notify signal is emitted on an object when one of its properties has its value set through set_property, @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 set_property results in notify being 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 notify or 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 connect call, like this:

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.

Parameters:

pspec

the ParamSpec of the property which changed.