qt sdk tcp server failed to detect new connection event

hi,all

I am newie in Qt for symbian.

I want to implement a tcp server ,so downloaded QT SDK.

I run a sample named fortune_server in Emulator.

when client connect fortune_server , tcp connection is successful. but client didn't receive message from server.

I set a breakpoint and debug ,and found the server didn't call the function of sendFortune(); It seems server didn't detect new connection?

And I run fortune_client in Emulator ,it works well.

Is there anything wrong ? quite puzzled.

Thanks for your time.

Below is the source codes :

#include <QtGui>
#include <QtNetwork>

#include <stdlib.h>

#include "server.h"

Server::Server(QWidget *parent)
: QDialog(parent)
{
statusLabel = new QLabel;
quitButton = new QPushButton(tr("Quit"));
quitButton->setAutoDefault(false);

//! [0] //! [1]
tcpServer = new QTcpServer(this);
if (!tcpServer->listen()) {
QMessageBox::critical(this, tr("Fortune Server"),
tr("Unable to start the server: %1.")
.arg(tcpServer->errorString()));
close();
return;
}
//! [0]

statusLabel->setText(tr("The server is running on port %1.\n"
"Run the Fortune Client example now.")
.arg(tcpServer->serverPort()));
//! [1]

//! [2]
fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
<< tr("You've got to think about tomorrow.")
<< tr("You will be surprised by a loud noise.")
<< tr("You will feel hungry again in another hour.")
<< tr("You might have mail.")
<< tr("You cannot kill time without injuring eternity.")
<< tr("Computers are not intelligent. They only think they are.");
//! [2]

connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
//! [3]
connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));
//! [3]

QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(quitButton);
buttonLayout->addStretch(1);

QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(statusLabel);
mainLayout->addLayout(buttonLayout);
setLayout(mainLayout);

setWindowTitle(tr("Fortune Server"));
}

//! [4]
void Server::sendFortune()
{
//! [5]
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_0);
//! [4] //! [6]
out << (quint16)0;
out << fortunes.at(qrand() % fortunes.size());
out.device()->seek(0);
out << (quint16)(block.size() - sizeof(quint16));
//! [6] //! [7]

QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
connect(clientConnection, SIGNAL(disconnected()),
clientConnection, SLOT(deleteLater()));
//! [7] //! [8]

clientConnection->write(block);
clientConnection->disconnectFromHost();
//! [5]
}#include <QtGui>
#include <QtNetwork>

#include <stdlib.h>

#include "server.h"

Server::Server(QWidget *parent)
: QDialog(parent)
{
statusLabel = new QLabel;
quitButton = new QPushButton(tr("Quit"));
quitButton->setAutoDefault(false);

//! [0] //! [1]
tcpServer = new QTcpServer(this);
if (!tcpServer->listen()) {
QMessageBox::critical(this, tr("Fortune Server"),
tr("Unable to start the server: %1.")
.arg(tcpServer->errorString()));
close();
return;
}
//! [0]

statusLabel->setText(tr("The server is running on port %1.\n"
"Run the Fortune Client example now.")
.arg(tcpServer->serverPort()));
//! [1]

//! [2]
fortunes << tr("You've been leading a dog's life. Stay off the furniture.")
<< tr("You've got to think about tomorrow.")
<< tr("You will be surprised by a loud noise.")
<< tr("You will feel hungry again in another hour.")
<< tr("You might have mail.")
<< tr("You cannot kill time without injuring eternity.")
<< tr("Computers are not intelligent. They only think they are.");
//! [2]

connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
//! [3]
connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));
//! [3]

QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(quitButton);
buttonLayout->addStretch(1);

QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(statusLabel);
mainLayout->addLayout(buttonLayout);
setLayout(mainLayout);

setWindowTitle(tr("Fortune Server"));
}

//! [4]
void Server::sendFortune()
{
//! [5]
QByteArray block;
QDataStream out(&block, QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_0);
//! [4] //! [6]
out << (quint16)0;
out << fortunes.at(qrand() % fortunes.size());
out.device()->seek(0);
out << (quint16)(block.size() - sizeof(quint16));
//! [6] //! [7]

QTcpSocket *clientConnection = tcpServer->nextPendingConnection();
connect(clientConnection, SIGNAL(disconnected()),
clientConnection, SLOT(deleteLater()));
//! [7] //! [8]

clientConnection->write(block);
clientConnection->disconnectFromHost();
//! [5]
}