+
+ /* Button is sensitive only if there is one camera connected */
+ monitor = empathy_camera_monitor_dup_singleton ();
+
+ g_object_set_data_full (G_OBJECT (picture_button),
+ "monitor", monitor, g_object_unref);
+
+ g_object_bind_property (monitor, "available", picture_button, "sensitive",
+ G_BINDING_SYNC_CREATE);