Re: [Vala] Using GDBus to Listen to Messages

[Luqman Aden <chaotic luqmanrocks co cc>]

Thank you for the examples provided but that is not what I'm trying to accomplish. I am trying to capture all 
Desktop Notifications via DBUS. 

On 2011-02-24, at 3:46 AM, JM <interflug1 gmx net> wrote:

> Hello
> Here is a client notification example fitting the server notifications I
> wrote some time ago(
> http://live.gnome.org/Vala/DBusServerSample#Service_with_D-Bus_property_change_notifications
> )
> --------------
> Client:
>
> [DBus (name = "org.example.Demo")]
> public interface Demo : Object {
>    public abstract string pubprop { owned get; set; }
> }
>
> [DBus (name = "org.freedesktop.DBus.Properties")]
> public interface NotifierProxy : Object {
>    public abstract signal void PropertiesChanged (string ifc,
> HashTable<string, Variant> ht, string[] inv_prop);
> }
>
> void main () {
>    Demo demo = null;
>    NotifierProxy np = null;
>    try {
>        demo = Bus.get_proxy_sync (BusType.SESSION, "org.example.Demo",
>
> "/org/example/demo");
>    } 
>    catch (IOError e) {
>        stderr.printf ("%s\n", e.message);
>    }
>    try {
>        np = Bus.get_proxy_sync (BusType.SESSION, "org.example.Demo",
>
> "/org/example/demo");
>    } 
>    catch (IOError er) {
>        stderr.printf ("%s\n", er.message);
>    }
>    demo.pubprop = "jkfdgk";
>    np.PropertiesChanged.connect( (x, ht, i) => { 
>        print("PropertiesChanged for %s\n", x); 
>    });
>    new GLib.MainLoop().run();
> }
> -------------------
>
>
> -------------------
> Server:
> [DBus (name = "org.example.Demo")]
> public class DemoServer : Object {
>
>    public string pubprop { owned get; set; }
>
>    private weak DBusConnection conn;
>
>    public DemoServer (DBusConnection conn) {
>        this.conn = conn;
>        this.notify.connect (send_property_change);
>    }
>
>    private void send_property_change (ParamSpec p) {
>        var builder = new VariantBuilder (VariantType.ARRAY);
>        var invalid_builder = new VariantBuilder (new VariantType
> ("as"));
>
>        if (p.name == "pubprop") {
>            Variant i = pubprop;
>            builder.add ("{sv}", "pubprop", i);
>        }
>
>        try {
>            conn.emit_signal (null, 
>                              "/org/example/demo", 
>                              "org.freedesktop.DBus.Properties", 
>                              "PropertiesChanged", 
>                              new Variant ("(sa{sv}as)", 
>                                           "org.example.Demo", 
>                                           builder, 
>                                           invalid_builder)
>                              );
>        } catch (Error e) {
>            stderr.printf ("%s\n", e.message);
>        }
>    }
> }
>
> public class NotificationsTest : Object {
>
>    private DemoServer dserver;
>
>    public NotificationsTest () {
>        Bus.own_name (BusType.SESSION, "org.example.Demo",
> BusNameOwnerFlags.NONE,
>                      on_bus_acquired, on_name_acquired, on_name_lost);
>    }
>
>    private void on_bus_acquired (DBusConnection conn) {
>        print ("bus acquired\n");
>        try {
>            this.dserver = new DemoServer (conn);
>            conn.register_object ("/org/example/demo", this.dserver);
>        } catch (IOError e) {
>            print ("%s\n", e.message);
>        }
>    }
>
>    private void on_name_acquired () {
>        print ("name acquired\n");
>    }  
>
>    private void on_name_lost () {
>        print ("name_lost\n");
>    }
>
>    public void setup_timeout () {
>        Timeout.add_seconds (4, () => {
>            dserver.pubprop = Random.next_int ().to_string ();
>            return true;
>        });
>    }
> }
>
> void main () {
>    var nt = new NotificationsTest ();
>    nt.setup_timeout ();
>    new MainLoop ().run ();
> }
> ---------------------
> Client and server should be compiled as usual with '--pkg gio-2.0'
> option.
> PS: I didn't check unpacking the PropertiesChanged args.
> I also didn't check your code. 
> Hope it still helps.
>
> Best Regards
>
>
>
>
>
> > Hello,
> >
> > I've been experimenting with the prowl protocol and transferring
> > notifications from a linux system to an iDevice with it. I've thus far come
> > up with a python proof of concept. I wanted to rewrite this into Vala as an
> > exercise for myself mostly.
> >
> > A little background first on how I capture the notifications. I basically
> > use the message filter feature of DBus to get the notifications, filtering
> > for interface=org.freedesktop.Notifications and member=Notify.
> >
> > This is how I've done so using Python: http://codepad.org/dauMCxXY
> >
> > At first with Vala I came up with this using dbus-glib:
> > http://codepad.org/JiFvX4vK
> >
> > But I've since found out that dbus-glib has been deprecated and is not
> > recommended for use. The alternative being GDBus. Thus I attempted to create
> > an equivalent program using it: http://codepad.org/RorMIB4O
> >
> > Unfortunately, this does not work as expected, as in not capturing the
> > notifications as desired. I'm not sure how to this using GDBus. I've asked
> > around in #vala on GIMPNet as well as #gtk.
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > http://mail.gnome.org/mailman/listinfo/vala-list