Re: [Vala] Dbus properies notifications

[tetete <geraeusch gmx net>]

Hello
Thanks for this hint Jan! 
But before I start doing everything manually I'd like to find out more
about dbus language support in vala. 
I found this comment in GDBus sources:
http://git.gnome.org/browse/glib/tree/gio/gdbusproxy.c?id=32f2e9a85beedeea36ac7623f68f6eb878465d44#n54
which sounds like property notifications from the remote object are
automatically forwarded to the ::notify signal of the Proxy. 

So maybe this feature is already/almost here?

Maybe one of the vala creators/experts can tell if this feature can be
used with dbus language support?

K.



> Hello,
>
> On Wed, Sep 22, 2010 at 12:00:40 +0200, tetete wrote:
> > Hello
> > Is there a possibility to get notifications of changed dbus server
> > properties on the client? 
> > I guess there is some "on board" vala way of doing this.
> > serverobject.notify.connect( (s,p)=>{print("%s\n",p.name);});
> > is not working.
> > The client can read the properties, but without change notifications,
> > they are far less useful.
> > I'm using GDBus and vala-0.10.0
>
> The DBus specification says that
> org.freedesktop.DBus.Properties.PropertiesChanged signal was added in 0.14,
> but may not be supported by particular implementations. Either because they
> were not yet updated to 0.14 or because they for some reason don't want to.
> See http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-properties
>
> I can't find when that specification version was released, but believe it's
> not more than a year.
>
> So try connecting to the PropertiesChanged signal. If that does not work, try
> using the methods of DBus.Proxy directly instead of relying on the laguage
> support. It still may not work if your server does not emit it, though.