=== modified file 'src/CMakeLists.txt'
--- src/CMakeLists.txt	2012-02-27 14:27:17 +0000
+++ src/CMakeLists.txt	2013-01-04 10:33:53 +0000
@@ -15,6 +15,10 @@
     ${QT_QTXML_INCLUDE_DIR}
     )
 
+qt4_add_dbus_interface(appmenu_qt_SRCS com.canonical.AppMenu.Registrar.xml
+                       registrar)
+
+
 qt4_automoc(${appmenu_qt_SRCS})
 
 link_directories(

=== modified file 'src/appmenuplatformmenubar.cpp'
--- src/appmenuplatformmenubar.cpp	2012-04-04 16:06:06 +0000
+++ src/appmenuplatformmenubar.cpp	2013-01-04 10:36:25 +0000
@@ -15,6 +15,7 @@
    along with appmenu-qt.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "appmenuplatformmenubar.h"
+#include "registrar.h"
 
 // dbusmenu-qt
 #include <dbusmenuexporter.h>
@@ -393,6 +394,8 @@
 
 bool MenuBarAdapter::registerWindow()
 {
+    static com::canonical::AppMenu::Registrar *registrar = 0;
+
     if (!m_menuBar->window()) {
         WARN << "No parent for this menubar";
         return false;
@@ -403,9 +406,8 @@
         return true;
     }
 
-    QDBusInterface host(REGISTRAR_SERVICE, REGISTRAR_PATH, REGISTRAR_IFACE);
-    if (!host.isValid()) {
-        return false;
+    if (!registrar) {
+        registrar = new com::canonical::AppMenu::Registrar(REGISTRAR_SERVICE, REGISTRAR_PATH, QDBusConnection::sessionBus(), 0);
     }
 
     Q_FOREACH(QAction *action, m_menuBar->actions()) {
@@ -428,8 +430,9 @@
     }
 
     m_registeredWinId = winId;
-    QVariant path = QVariant::fromValue<QDBusObjectPath>(QDBusObjectPath(m_objectPath));
-    host.asyncCall(QLatin1String("RegisterWindow"), QVariant(winId), path);
+    if (registrar) {
+        registrar->RegisterWindow(winId, QDBusObjectPath(m_objectPath));
+    }
     return true;
 }
 

=== added file 'src/com.canonical.AppMenu.Registrar.xml'
--- src/com.canonical.AppMenu.Registrar.xml	1970-01-01 00:00:00 +0000
+++ src/com.canonical.AppMenu.Registrar.xml	2013-01-04 10:04:35 +0000
@@ -0,0 +1,56 @@
+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<node xmlns:dox="http://www.ayatana.org/dbus/dox.dtd">
+	<dox:d><![CDATA[
+	  @mainpage
+	 
+	  An interface to register menus that are associated with a window in an application.  The
+	  main interface is docuemented here: @ref com::canonical::AppMenu::Registrar.
+	    
+	  The actual menus are transported using the dbusmenu protocol which is available
+	  here: @ref com::canonical::dbusmenu.
+	]]></dox:d>
+	<interface name="com.canonical.AppMenu.Registrar" xmlns:dox="http://www.ayatana.org/dbus/dox.dtd">
+		<dox:d>
+		  An interface to register a menu from an application's window to be displayed in another
+		  window.  This manages that association between XWindow Window IDs and the dbus
+		  address and object that provides the menu using the dbusmenu dbus interface.
+		</dox:d>
+		<method name="RegisterWindow">
+			<dox:d><![CDATA[
+			  Associates a dbusmenu with a window
+	     
+			  /note this method assumes that the connection from the caller is the DBus connection
+			    to use for the object.  Applications that use multiple DBus connections will need to
+			    ensure this method is called with the same connection that implmenets the object.
+			]]></dox:d>
+			<arg name="windowId" type="u" direction="in">
+				<dox:d>The XWindow ID of the window</dox:d>
+			</arg>
+			<arg name="menuObjectPath" type="o" direction="in">
+				<dox:d>The object on the dbus interface implementing the dbusmenu interface</dox:d>
+			</arg>
+		</method>
+		<method name="UnregisterWindow">
+			<dox:d>
+			  A method to allow removing a window from the database.  Windows will also be removed
+			  when the client drops off DBus so this is not required.  It is polite though.  And
+			  important for testing.
+			</dox:d>
+			<arg name="windowId" type="u" direction="in">
+				<dox:d>The XWindow ID of the window</dox:d>
+			</arg>
+		</method>
+		<method name="GetMenuForWindow">
+			<dox:d>Gets the registered menu for a given window ID.</dox:d>
+			<arg name="windowId" type="u" direction="in">
+				<dox:d>The XWindow ID of the window to get</dox:d>
+			</arg>
+			<arg name="service" type="s" direction="out">
+				<dox:d>The address of the connection on DBus (e.g. :1.23 or org.example.service)</dox:d>
+			</arg>
+			<arg name="menuObjectPath" type="o" direction="out">
+				<dox:d>The path to the object which implements the com.canonical.dbusmenu interface.</dox:d>
+			</arg>
+		</method>
+	</interface>
+</node>