[maemo-developers] calling a Qt dbus method from a HILDON desktop widget

[From: Daniil Ivanov]

Hi!

  Is your service really running on system bus?
  You don't need Qt client for testing as dbus-send exists.

Thanks, Daniil.

On Tue, Feb 9, 2010 at 2:53 PM, ibrahim <ibrahim.ali at asgatech.com> wrote:
> greetings;
>
> I was creating an application with Qt that exposes a dbus service. the
> service returns its output  as a QStringList. I tested this dbus service
> with a client written in Qt and it worked perfectly.
>
> I wanted to create a Desktop widget that can consume this dbus service. I
> created a normal C file that calls the dbus service - just as POC to see if
> it works by modifying some code i found (a C file that gets the imei ,
> written by mr.faheem
> http://talk.maemo.org/showpost.php?p=371496&postcount=45)
> my code is :
>
> #include <stdlib.h>
> #include <glib.h>
> #include <glib/gprintf.h>
> #include <dbus/dbus-glib.h>
> #include <string.h>
> #include <stdio.h>
> static GList* ptimes_list = NULL;
> int fn() {
> DBusGConnection *conn;
>   GError *error = NULL;
>
>   conn = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
>   if (!conn) {
>           g_printerr ("Error: %s\n", error->message);
>           g_error_free (error);
>           return 0;
>   }
>   DBusGProxy *proxy = NULL;
>   /* replaced the cinstants with values from my dbus interface */
>   proxy = dbus_g_proxy_new_for_name(conn, SERVICE_NAME,PATH ,INTERFACE);
>               if (!proxy) {
>   printf("No proxy, dbus_g_proxy_new_for_name() failed \n");
>       return 0;
>   }
>         if (!dbus_g_proxy_call(proxy,"mthod_name", &error,my_list) )
>       {
>           /* dbus_g_proxy_call failed */
>           printf("dbus_g_proxy_call(proxy,method, &error,myList) returned
> FALSE \n");
>           return 0;
>       }
>       if (!my_list) {
>           /* output list is empty */
>           printf("my_list) glist is still NULL \n");
>           return 0;
>       }
>       g_object_unref(proxy);
>   char[10] element = (char*) g_list_nth_data(my_list),0);     printf("the
> value of the fajr first is %s \n",element);
>   return 1;
> }
> the program fails at this point: proxy = dbus_g_proxy_new_for_name(conn,
> SERVICE_NAME,PATH ,INTERFACE);
> and my application stops.
>
> I wonder what is wrong with the way I called my DBus service . Any help is
> appreciated!
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