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/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** Licensees holding a valid Qt License Agreement may use this file in
** accordance with the rights, responsibilities and obligations
** contained therein. Please consult your licensing agreement or
** contact sales@trolltech.com if any conditions of this licensing
** agreement are not clear to you.
**
** Further information about Qt licensing is available at:
** http://www.trolltech.com/products/qt/licensing.html or by
** contacting info@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#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
Copyright © 2008 Trolltech | Trademarks | Qt 4.3.5 |