How do I dispatch a signal containing a variant with DBus-GLib?

Hi all,

I’m using the DBus-GLib bindings and would like to dispatch a signal containing a GValue variant type.  I am not able to receive signals that contain a variant type, but I am able to dispatch and receive signals using non-variant types.

I’m also able to send and receive GValue types using method calls just fine.

I’m using the following code:

(again, this works fine when sending a char*, or other non-variant, instead of GValue)

Introspection:

<signal name="VariantSignal">

<arg type="v" name="value" />

</signal>

C code fragments:

--to create the signal ----

signals[VARIANT_SIGNAL] =

    g_signal_new ("VariantSignal",

                  G_OBJECT_CLASS_TYPE (klass),

                  (GSignalFlags) (G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED),

                  0,

                  NULL, NULL,

                  g_cclosure_marshal_VOID__BOXED,

                  G_TYPE_NONE, 1, G_TYPE_VALUE);

----- to dispatch the signal  ---

    GValue gv = {0};

    g_value_init(&gv, G_TYPE_STRING);   

    g_value_set_string(&gv, "Hello");   

    g_signal_emit (obj, signals[VARIANT_SIGNAL], 0, value);

    return TRUE;

I’m really sorry!  I made a silly mistake on the client side (the client was expecting the wrong signal prototype).  This code works fine.

Hi all,

I’m using the DBus-GLib bindings and would like to dispatch a signal containing a GValue variant type.  I am not able to receive signals that contain a variant type, but I am able to dispatch and receive signals using non-variant types.

I’m also able to send and receive GValue types using method calls just fine.

I’m using the following code:

(again, this works fine when sending a char*, or other non-variant, instead of GValue)

Introspection:

<signal name="VariantSignal">

<arg type="v" name="value" />

</signal>

C code fragments:

--to create the signal ----

signals[VARIANT_SIGNAL] =

    g_signal_new ("VariantSignal",

                  G_OBJECT_CLASS_TYPE (klass),

                  (GSignalFlags) (G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED),

                  0,

                  NULL, NULL,

                  g_cclosure_marshal_VOID__BOXED,

                  G_TYPE_NONE, 1, G_TYPE_VALUE);

----- to dispatch the signal  ---

    GValue gv = {0};

    g_value_init(&gv, G_TYPE_STRING);   

    g_value_set_string(&gv, "Hello");   

    g_signal_emit (obj, signals[VARIANT_SIGNAL], 0, value);

    return TRUE;