--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/network/network-chat/connection.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CONNECTION_H
+#define CONNECTION_H
+
+#include <QHostAddress>
+#include <QString>
+#include <QTcpSocket>
+#include <QTime>
+#include <QTimer>
+
+static const int MaxBufferSize = 1024000;
+
+class Connection : public QTcpSocket
+{
+    Q_OBJECT
+
+public:
+    enum ConnectionState {
+        WaitingForGreeting,
+        ReadingGreeting,
+        ReadyForUse
+    };
+    enum DataType {
+        PlainText,
+        Ping,
+        Pong,
+        Greeting,
+        Undefined
+    };
+
+    Connection(QObject *parent = 0);
+
+    QString name() const;
+    void setGreetingMessage(const QString &message);
+    bool sendMessage(const QString &message);
+
+signals:
+    void readyForUse();
+    void newMessage(const QString &from, const QString &message);
+
+protected:
+    void timerEvent(QTimerEvent *timerEvent);
+
+private slots:
+    void processReadyRead();
+    void sendPing();
+    void sendGreetingMessage();
+
+private:
+    int readDataIntoBuffer(int maxSize = MaxBufferSize);
+    int dataLengthForCurrentDataType();
+    bool readProtocolHeader();
+    bool hasEnoughData();
+    void processData();
+
+    QString greetingMessage;
+    QString username;
+    QTimer pingTimer;
+    QTime pongTime;
+    QByteArray buffer;
+    ConnectionState state;
+    DataType currentDataType;
+    int numBytesForCurrentDataType;
+    int transferTimerId;
+    bool isGreetingMessageSent;
+};
+
+#endif