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

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 3.3 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41#ifndef CONNECTION_H
42#define CONNECTION_H
43
44#include <QHostAddress>
45#include <QString>
46#include <QTcpSocket>
47#include <QTime>
48#include <QTimer>
49
50static const int MaxBufferSize = 1024000;
51
52class Connection : public QTcpSocket
53{
54 Q_OBJECT
55
56public:
57 enum ConnectionState {
58 WaitingForGreeting,
59 ReadingGreeting,
60 ReadyForUse
61 };
62 enum DataType {
63 PlainText,
64 Ping,
65 Pong,
66 Greeting,
67 Undefined
68 };
69
70 Connection(QObject *parent = 0);
71
72 QString name() const;
73 void setGreetingMessage(const QString &message);
74 bool sendMessage(const QString &message);
75
76signals:
77 void readyForUse();
78 void newMessage(const QString &from, const QString &message);
79
80protected:
81 void timerEvent(QTimerEvent *timerEvent);
82
83private slots:
84 void processReadyRead();
85 void sendPing();
86 void sendGreetingMessage();
87
88private:
89 int readDataIntoBuffer(int maxSize = MaxBufferSize);
90 int dataLengthForCurrentDataType();
91 bool readProtocolHeader();
92 bool hasEnoughData();
93 void processData();
94
95 QString greetingMessage;
96 QString username;
97 QTimer pingTimer;
98 QTime pongTime;
99 QByteArray buffer;
100 ConnectionState state;
101 DataType currentDataType;
102 int numBytesForCurrentDataType;
103 int transferTimerId;
104 bool isGreetingMessageSent;
105};
106
107#endif
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