Re: Use of GObject properties in GTK+ 2.0

[Havoc Pennington <hp redhat com>]

"Padraig O'Briain" <Padraig Obriain ireland sun com> writes:
> A quick perusal of the GTK+ 2.0 code suggests that GtkObject arguments are 
> implemented as GObject properties.
> 
> In the GObject source code I came across the signals "properties_changed" and 
> "notify".
> 
> I did not find any code in gobject.c which connected what looks like the
> signal handlers, i.e. g_object_notify_property_changed()  and
> g_object_property_changed(), to the "properties_changed" and "notify" signal.
> Did I miss something?
> 
> Is the "properties_changed" signal in GObject a public interface which we
> can use to connect a signal handler to be invoked when the property changes?
> 
> My interest in this is that the Accessibility API which we are trying to define 
> needs to be able to add and remove what is Java termininology are property 
> change listeners.
> 
> 

If you look at tests/testtreeview.c there's some code which uses the
notification. 

I am totally mystified by why there are two signals,
properties_changed and also notify - I think there should be only
notify. But, maybe Tim can explain that.

Havoc