I'm trying to write a desktop environment that supports the global menu Before I get started with my main task In PyQt I'm trying to get the dbus code to work with
QtDBus as a proof of concept. Here's the pretty-printed output and method signature I got from d-feet:
GetMenus() -> (Array of [Struct of (Uint32,String,Object Path)] menus) [(60817412L, u':1.155', '/com/canonical/menu/3A00004'), (58725289L, u':1.151', '/com/canonical/menu/38013A9'), (58720393L, u':1.151', '/com/canonical/menu/3800089'), (62916305L, u':1.159', '/com/canonical/menu/3C006D1'), (54526127L, u':1.129', '/com/canonical/menu/34000AF'), (58725701L, u':1.151', '/com/canonical/menu/3801545'), (25167093L, u':1.22', '/com/canonical/menu/18004F5'), (58726237L, u':1.151', '/com/canonical/menu/380175D'), (60825279L, u':1.155', '/com/canonical/menu/3A01EBF'), (58721371L, u':1.151', '/com/canonical/menu/380045B'), (25165828L, u':1.22', '/com/canonical/menu/1800004')]
This is the code I wrote in PyQt expecting something similar:
from PyQt4.QtGui import QApplication from PyQt4.QtDBus import QDBus from PyQt4.QtDBus import QDBusConnection from PyQt4.QtDBus import QDBusInterface desktop = QApplication() session_bus_connection = QDBusConnection.sessionBus() service_name = 'com.canonical.AppMenu.Registrar' service_path = 'com/canonical/AppMenu/Registrar' interface = 'com.canonical.AppMenu.Registrar' menu = QDBusInterface(service_name, service_path, interface, QDBusConnection.sessionBus()) reply = menu.call('GetMenus') print reply.arguments() desktop.exec_()
This is the output actually I get from the code above:
christopher@xx-pc:~/Documents/Code$ python desktop_dbus.py process 2613: arguments to dbus_message_new_method_call() were incorrect, assertion "_dbus_check_is_valid_path (path)" failed in file ../../dbus/dbus-message.c line 1204. This is normally a bug in some application using the D-Bus library. process 2613: arguments to dbus_message_set_auto_start() were incorrect, assertion "message != NULL" failed in file ../../dbus/dbus-message.c line 2885. This is normally a bug in some application using the D-Bus library. process 2613: arguments to dbus_message_iter_init_append() were incorrect, assertion "message != NULL" failed in file ../../dbus/dbus-message.c line 2284. This is normally a bug in some application using the D-Bus library. QDBusConnection: error: could not send message to service "com.canonical.AppMenu.Registrar" path "com/canonical/AppMenu/Registrar" interface "org.freedesktop.DBus.Introspectable" member "Introspect": 
Can anyone tell me why the message isn't being sent?