Simple chat example. How can I make a list of participants?

[Luga]

Hi everyone!
I need to make a chat. On your site I found an example. But there's no list of participants. How can I do?

Do I understand that the data on a server need to send in that format?
And if the server receives GRTNG, it verifies the existence of party with the same name and save it.?

QByteArray arrBlock;
QDataStream out (& arrBlock, QIODevice:: WriteOnly);
out.setVersion (QDataStream:: Qt_4_5);
out <<quint16 (0) << QString("GRTNG") << nick->text ();
out.device () -> seek (0);
out <<quint16 (arrBlock.size () - sizeof (quint16));
socket-> write (arrBlock);

QByteArray arrBlock;
QDataStream out (& arrBlock, QIODevice:: WriteOnly);
out.setVersion (QDataStream:: Qt_4_5);
out <<quint16 (0) << QString("GRTNG") << nick->text ();
out.device () -> seek (0);
out <<quint16 (arrBlock.size () - sizeof (quint16));
socket-> write (arrBlock);

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and

QByteArray arrBlock;
QDataStream out (& arrBlock, QIODevice:: WriteOnly);
out.setVersion (QDataStream:: Qt_4_5);
out <<quint16 (0) << QString("MSG") << message->text ();
out.device () -> seek (0);
out <<quint16 (arrBlock.size () - sizeof (quint16));
socket-> write (arrBlock);

QByteArray arrBlock;
QDataStream out (& arrBlock, QIODevice:: WriteOnly);
out.setVersion (QDataStream:: Qt_4_5);
out <<quint16 (0) << QString("MSG") << message->text ();
out.device () -> seek (0);
out <<quint16 (arrBlock.size () - sizeof (quint16));
socket-> write (arrBlock);

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I am sorry for my bad English. I hope you understand me.

[kei]

Have you seen this: Network Chat Example

[Luga]

Have you seen this: Network Chat Example

Yes, I have seen this example. This is not a client-server chat. And I did not understand the code. All very confusing.

[tpf80]

On the server you have:

QList<QTcpSocket*> connections;

QList<QTcpSocket*> connections;

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so pretty much you just need to make an array of usernames which is indexed by the socket ID's in the list.

whenever the list changes because other users connected, you would need to make the server send the list to all of the clients because only the server is aware of all the client connections.