--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/network/loopback/dialog.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,187 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtNetwork>
+
+#include "dialog.h"
+
+#if !defined(Q_OS_WINCE)
+static const int TotalBytes = 50 * 1024 * 1024;
+#else
+static const int TotalBytes = 5 * 1024 * 1024;
+#endif
+static const int PayloadSize = 65536;
+
+Dialog::Dialog(QWidget *parent)
+    : QDialog(parent)
+{
+    clientProgressBar = new QProgressBar;
+    clientStatusLabel = new QLabel(tr("Client ready"));
+    serverProgressBar = new QProgressBar;
+    serverStatusLabel = new QLabel(tr("Server ready"));
+
+    startButton = new QPushButton(tr("&Start"));
+    quitButton = new QPushButton(tr("&Quit"));
+
+    buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(startButton, QDialogButtonBox::ActionRole);
+    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
+
+    connect(startButton, SIGNAL(clicked()), this, SLOT(start()));
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(&tcpServer, SIGNAL(newConnection()),
+            this, SLOT(acceptConnection()));
+    connect(&tcpClient, SIGNAL(connected()), this, SLOT(startTransfer()));
+    connect(&tcpClient, SIGNAL(bytesWritten(qint64)),
+            this, SLOT(updateClientProgress(qint64)));
+    connect(&tcpClient, SIGNAL(error(QAbstractSocket::SocketError)),
+            this, SLOT(displayError(QAbstractSocket::SocketError)));
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(clientProgressBar);
+    mainLayout->addWidget(clientStatusLabel);
+    mainLayout->addWidget(serverProgressBar);
+    mainLayout->addWidget(serverStatusLabel);
+    mainLayout->addStretch(1);
+    mainLayout->addSpacing(10);
+    mainLayout->addWidget(buttonBox);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Loopback"));
+}
+
+void Dialog::start()
+{
+    startButton->setEnabled(false);
+
+#ifndef QT_NO_CURSOR
+    QApplication::setOverrideCursor(Qt::WaitCursor);
+#endif
+
+    bytesWritten = 0;
+    bytesReceived = 0;
+
+    while (!tcpServer.isListening() && !tcpServer.listen()) {
+        QMessageBox::StandardButton ret = QMessageBox::critical(this,
+                                        tr("Loopback"),
+                                        tr("Unable to start the test: %1.")
+					.arg(tcpServer.errorString()),
+                                        QMessageBox::Retry
+					| QMessageBox::Cancel);
+        if (ret == QMessageBox::Cancel)
+            return;
+    }
+
+    serverStatusLabel->setText(tr("Listening"));
+    clientStatusLabel->setText(tr("Connecting"));
+    tcpClient.connectToHost(QHostAddress::LocalHost, tcpServer.serverPort());
+}
+
+void Dialog::acceptConnection()
+{
+    tcpServerConnection = tcpServer.nextPendingConnection();
+    connect(tcpServerConnection, SIGNAL(readyRead()),
+            this, SLOT(updateServerProgress()));
+    connect(tcpServerConnection, SIGNAL(error(QAbstractSocket::SocketError)),
+            this, SLOT(displayError(QAbstractSocket::SocketError)));
+
+    serverStatusLabel->setText(tr("Accepted connection"));
+    tcpServer.close();
+}
+
+void Dialog::startTransfer()
+{
+    bytesToWrite = TotalBytes - (int)tcpClient.write(QByteArray(PayloadSize, '@'));
+    clientStatusLabel->setText(tr("Connected"));
+}
+
+void Dialog::updateServerProgress()
+{
+    bytesReceived += (int)tcpServerConnection->bytesAvailable();
+    tcpServerConnection->readAll();
+
+    serverProgressBar->setMaximum(TotalBytes);
+    serverProgressBar->setValue(bytesReceived);
+    serverStatusLabel->setText(tr("Received %1MB")
+                               .arg(bytesReceived / (1024 * 1024)));
+
+    if (bytesReceived == TotalBytes) {
+        tcpServerConnection->close();
+        startButton->setEnabled(true);
+#ifndef QT_NO_CURSOR
+        QApplication::restoreOverrideCursor();
+#endif
+    }
+}
+
+void Dialog::updateClientProgress(qint64 numBytes)
+{
+    bytesWritten += (int)numBytes;
+    if (bytesToWrite > 0)
+        bytesToWrite -= (int)tcpClient.write(QByteArray(qMin(bytesToWrite, PayloadSize), '@'));
+
+    clientProgressBar->setMaximum(TotalBytes);
+    clientProgressBar->setValue(bytesWritten);
+    clientStatusLabel->setText(tr("Sent %1MB")
+                               .arg(bytesWritten / (1024 * 1024)));
+}
+
+void Dialog::displayError(QAbstractSocket::SocketError socketError)
+{
+    if (socketError == QTcpSocket::RemoteHostClosedError)
+        return;
+
+    QMessageBox::information(this, tr("Network error"),
+                             tr("The following error occurred: %1.")
+                             .arg(tcpClient.errorString()));
+
+    tcpClient.close();
+    tcpServer.close();
+    clientProgressBar->reset();
+    serverProgressBar->reset();
+    clientStatusLabel->setText(tr("Client ready"));
+    serverStatusLabel->setText(tr("Server ready"));
+    startButton->setEnabled(true);
+#ifndef QT_NO_CURSOR
+    QApplication::restoreOverrideCursor();
+#endif
+}