add_observer_filter_vardict

Register a new channel class as Observer.

ObserverChannelFilter. The observe_channels virtual method will be called whenever a new channel's properties match the ones in filter.

This method may only be called before register is called, and may only be called on objects whose class implements observe_channels.

If the variant is floating (see g_variant_ref_sink), ownership will be taken, allowing for uses like this:

tp_base_client_add_observer_filter_vardict (client,
   g_variant_new_parsed ("{ %s: <%s>, %s: <%u>, ... }",
       TP_PROP_CHANNEL_CHANNEL_TYPE, TP_IFACE_CHANNEL_TYPE_TEXT,
       TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, (guint32) TP_HANDLE_TYPE_CONTACT,
       ...));

Parameters:

this	a client
filter	a variant of type VARDICT