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Pass a QString to other class doesn't work.

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Jagwah

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  • "Jagwah" is male
  • "Jagwah" started this thread

Posts: 3

Location: Belgium

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1

Saturday, May 19th 2012, 2:04pm

Pass a QString to other class doesn't work.

Hello,

I'm having a problem with passing a QString to another class..
I'm making a multiplayer game (ticTacToe) where i have to use UDP and TCP socket/server.

To send a commando to a client with UDP i need the IP of the client, so in the TCP server i did this:
ipClient = socket->peerAddress().toString();

This gives me the Ip of the client.
Now i have to pass this Ip to my udpUser1 class :

udpUser1 userOne;
userOne.setIpClient1(ipClient);

in the class udpUser1 i make a private variable:
QString ipUser1;

in the function void udpUser1::setIpClient1(QString Ip)
ipUser1 = Ip;

to send a commando to the client, i use as QHostAddress:
QHostAddress hostIp(ipUser1);

problem -> ipUser1 is in the function to send data to the client always empty... :(
Can someone please help me...
i don't see what i'm doing wrong.

btw:
I'm new to this forum, so if i'm doing something wrong please tell me :).

server.cpp

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void server::incomingConnection(int handle)
{
    udpUser1 userOne;
    udpUser2 userTwo;
    clientServer *socket = new clientServer(this);
    socket->setSocketDescriptor(handle);
    qDebug() << "connected to: "<< socket->peerAddress().toString() << " @ "<< socket->peerPort();

    ipClient = socket->peerAddress().toString();

    ipClientt = ipClient;

    if(ipClient1 == "")
    {
        userOne.setIpClient1(ipClientt);
        qDebug() << ipClientt;
    }
    else
    {
        if(!(ipClient1 == ipClientt))
        {
            userTwo.setIpClient2(ipClientt);
            qDebug() << ipClientt;
        }
    }
}


udpUser1.cpp

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udpUser1::udpUser1(QObject *parent) :
    QUdpSocket(parent)
{
    this->bind(5821);
    connect(this,SIGNAL(readyRead()), this, SLOT(processPendingDatagrams()));
}

void udpUser1::setIpClient1(QString Ip)
{
    ipUser1 = Ip;
    qDebug() << ipUser1;
}

void udpUser1::processPendingDatagrams()
{

    qDebug() << "udp1 reading ";
    QByteArray datagram;

    do
    {
        datagram.resize(this->pendingDatagramSize());
        this->readDatagram(datagram.data(), datagram.size());
    }
    while(this->hasPendingDatagrams());

    QDataStream in(&datagram, QIODevice::ReadOnly);
    in.setVersion(QDataStream::Qt_4_3);
    in >> incommingData;

    logic logi;
    logi.incommingDataFunctionUser1(incommingData);
}

void udpUser1::sendCommandoToClient1(QString commando)
{

    QByteArray datagram;
    QDataStream out(&datagram, QIODevice::WriteOnly);
    out.setVersion(QDataStream::Qt_4_3);
    out << commando;

    qDebug() << " send " << commando << "commando to : " << ipUser1;
    QHostAddress hostIp(ipUser1);


    this->writeDatagram(datagram, hostIp, 5821);

}

Amleto

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Posts: 1,430

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2

Saturday, May 19th 2012, 2:34pm

debug this section, pay attention to ipClient1 - you never mention this. When is it updated?

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ipClient = socket->peerAddress().toString();

    ipClientt = ipClient;

    if(ipClient1 == "")
    {
        userOne.setIpClient1(ipClientt);
        qDebug() << ipClientt;
    }
    else
    {
        if(!(ipClient1 == ipClientt))
        {
            userTwo.setIpClient2(ipClientt);
            qDebug() << ipClientt;
        }
    }
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

Jagwah

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  • "Jagwah" is male
  • "Jagwah" started this thread

Posts: 3

Location: Belgium

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3

Saturday, May 19th 2012, 2:39pm

hi, first of all thanks for your response.

i just declare ipClient1 in the header file.
So when it's empty the first connection of the TCP server = Client1.

i get no error's btw.

Amleto

Professional

Posts: 1,430

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4

Saturday, May 19th 2012, 4:12pm

so debug it. use your debugger.
If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

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