source: trunk/examples/network/network-chat/connection.h@ 5

Last change on this file since 5 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 3.2 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
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36** If you are unsure which license is appropriate for your use, please
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38** $QT_END_LICENSE$
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40****************************************************************************/
41
42#ifndef CONNECTION_H
43#define CONNECTION_H
44
45#include <QHostAddress>
46#include <QString>
47#include <QTcpSocket>
48#include <QTime>
49#include <QTimer>
50
51static const int MaxBufferSize = 1024000;
52
53class Connection : public QTcpSocket
54{
55 Q_OBJECT
56
57public:
58 enum ConnectionState {
59 WaitingForGreeting,
60 ReadingGreeting,
61 ReadyForUse
62 };
63 enum DataType {
64 PlainText,
65 Ping,
66 Pong,
67 Greeting,
68 Undefined
69 };
70
71 Connection(QObject *parent = 0);
72
73 QString name() const;
74 void setGreetingMessage(const QString &message);
75 bool sendMessage(const QString &message);
76
77signals:
78 void readyForUse();
79 void newMessage(const QString &from, const QString &message);
80
81protected:
82 void timerEvent(QTimerEvent *timerEvent);
83
84private slots:
85 void processReadyRead();
86 void sendPing();
87 void sendGreetingMessage();
88
89private:
90 int readDataIntoBuffer(int maxSize = MaxBufferSize);
91 int dataLengthForCurrentDataType();
92 bool readProtocolHeader();
93 bool hasEnoughData();
94 void processData();
95
96 QString greetingMessage;
97 QString username;
98 QTimer pingTimer;
99 QTime pongTime;
100 QByteArray buffer;
101 ConnectionState state;
102 DataType currentDataType;
103 int numBytesForCurrentDataType;
104 int transferTimerId;
105 bool isGreetingMessageSent;
106};
107
108#endif
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