[maemo-developers] Rotation support.. :(

[From: Aniello Del Sorbo]

I am trying to add rotation to Xournal.

I have defined the DBus message sig as follows:

#define MCE_SIGNAL_MATCH "type='signal',"  \
        "sender='"    MCE_SERVICE                "'," \
        "path='"      MCE_SIGNAL_PATH            "'," \
        "interface='" MCE_SIGNAL_IF              "'"

then I've added a DBus filter and handler:

sys_conn = osso_get_sys_dbus_connection(ctx);
  if (sys_conn) {
        DBusError error;
        dbus_error_init (&error);
        dbus_bus_add_match (sys_conn, MCE_SIGNAL_MATCH, &error);
        if (dbus_error_is_set(&error)){
                printf("dbus_bus_add_match failed: %s\n", error.message);
                dbus_error_free(&error);
        }

        if (!dbus_connection_add_filter (sys_conn,
                  (DBusHandleMessageFunction) mce_filter_func, NULL, NULL)) {
                printf("Error dbus_connection_add_filter failed\n");
        } else {
                printf ("DBUS filter added\n");
        }
  }

and defined the handler function:

DBusHandlerResult
mce_filter_func (DBusConnection *connection, DBusMessage *message, void *data)
{
        DBusMessageIter iter;
        const gchar *mode = NULL;

        printf ("MCE\n");

        if (dbus_message_is_signal(message, MCE_SIGNAL_IF,
MCE_DEVICE_ORIENTATION_SIG)) {
                printf ("is a orientation signal\n");
                if (dbus_message_iter_init(message, &iter)) {
                        printf ("getting mode\n");
                        dbus_message_iter_get_basic(&iter, &mode);

                        hildon_rotate_ui (mode);
                }
        }

        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}

It compiles, starts up, the MCE function gets called twice when
Xournal starts (it prints MCE twice) and gets called for several other
DBus messages (like screen lock/unlock), but NOT for rotate messages.

What am I missing?

Thanks!

References:
[1] <http://wiki.maemo.org/Using_Fremantle_Widgets#Listening_To_Hardware_Orientation_Changes>

[2] <http://wiki.maemo.org/Documentation/Maemo_5_Developer_Guide/Porting_Software/Porting_Existing_GTK%2B_Application_to_Maemo_5#Portrait_Mode>

[3] <https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/omweather/src/weather-portrait.c?revision=2951&root=omweather&view=markup>

[4] <https://garage.maemo.org/plugins/scmsvn/viewcvs.php/trunk/omweather/src/weather-dbus.c?revision=3265&root=omweather&view=markup>

-- 
anidel
Sent from London, Eng, United Kingdom