sending a signal though the dbus.

[savaliya_ambani]

I am sending a QDBusMessage signal through dbus to a dbus-glib application. but i am not recieving a signal ,i dont know what to do?

I can send signals and methodcall to qt application ,but reverse is not happening.

below is my code:

/********start******************/

QDBusMessage message=createsignal("/","local.Widget","pong"); //pong is signal and local.wirdget is an interface
if(conncetion.send(message))
{
qDebg()<<"yes i can send the pong signal and see with dbus--monitor "<<endl;
}


Now,on dbus-glib side i am doing this:

dbus_g_proxy_add_signal(proxy,"pong",G_tPE_INVALID );
dbus_g_proxy_connect_signal(proxy,"pong",G_CALLBAC K(pong_callback),NUL,NULL);

static void pong_callback(void)
{
g_print("yes,now entered into callback"); //this is not getting invoked
}

/************End****************/

Can some one please guide me on this.What can be the wrong?

Thankyou.

[savaliya_ambani]

hello,

how can we represnt a structure in qt? i want to send and receive a structure though dbus.your reply will be a useful for me.

thank you.

[savaliya_ambani]

i am sending a strucutre though dbsu-glib as follow.
typedef struct{
int a;
int b;
char [5];
}payload;

payload p={5,5,"ARRAY"};

And i am able to send this structure data with function call,which i can see in dbus-monitor as follow.
array[
array[
byte 5;
byte 5;
byte 65;
....
byte 89;
]
]
signature is :'aay'
up to this every thing is OK.

But on qt side(receiver) i dont have any idea as to how to receive this message.what can be the argument of my function in qt application?

i tried with QByteArray,QStringList but no succusses.now,what to do?

[savaliya_ambani]

hellow,

if i want receive call from a remote application as shown in the upper post,i need to register a class member which can have the arguments as "array of array of bytes".

is it possible to generate this?how can i do this.
please reply me urgently.

thanking u all.

[artako]

I had the same problem and spent the whole day on it.

The only thing you need is to register the service before sending the signal from Qt.

It should look like this:

if (! connection.registerService("local.Widget"))
{
    qDebug() << "Failed to register the service. Is it already registered?";
}
QDBusMessage message=createsignal("/","local.Widget","pong"); //pong is signal and local.Widget is an interface
if(conncetion.send(message))
{
    qDebug()<<"yes i can send the pong signal and see with dbus --monitor "<<endl;
}

if (! connection.registerService("local.Widget"))
{
    qDebug() << "Failed to register the service. Is it already registered?";
}
QDBusMessage message=createsignal("/","local.Widget","pong"); //pong is signal and local.Widget is an interface
if(conncetion.send(message))
{
    qDebug()<<"yes i can send the pong signal and see with dbus --monitor "<<endl;
}

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