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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the examples of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include <QtGui> |
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43 #include <QtNetwork> |
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44 |
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45 #include "client.h" |
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46 |
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47 #ifdef Q_OS_SYMBIAN |
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48 #include "sym_iap_util.h" |
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49 #endif |
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50 |
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51 //! [0] |
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52 Client::Client(QWidget *parent) |
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53 : QDialog(parent) |
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54 { |
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55 //! [0] |
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56 hostLabel = new QLabel(tr("&Server name:")); |
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57 portLabel = new QLabel(tr("S&erver port:")); |
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58 |
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59 // find out which IP to connect to |
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60 QString ipAddress; |
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61 QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses(); |
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62 // use the first non-localhost IPv4 address |
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63 for (int i = 0; i < ipAddressesList.size(); ++i) { |
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64 if (ipAddressesList.at(i) != QHostAddress::LocalHost && |
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65 ipAddressesList.at(i).toIPv4Address()) { |
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66 ipAddress = ipAddressesList.at(i).toString(); |
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67 break; |
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68 } |
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69 } |
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70 // if we did not find one, use IPv4 localhost |
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71 if (ipAddress.isEmpty()) |
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72 ipAddress = QHostAddress(QHostAddress::LocalHost).toString(); |
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73 |
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74 hostLineEdit = new QLineEdit(ipAddress); |
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75 portLineEdit = new QLineEdit; |
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76 portLineEdit->setValidator(new QIntValidator(1, 65535, this)); |
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77 |
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78 hostLabel->setBuddy(hostLineEdit); |
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79 portLabel->setBuddy(portLineEdit); |
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80 |
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81 statusLabel = new QLabel(tr("This examples requires that you run the " |
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82 "Fortune Server example as well.")); |
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83 |
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84 getFortuneButton = new QPushButton(tr("Get Fortune")); |
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85 getFortuneButton->setDefault(true); |
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86 getFortuneButton->setEnabled(false); |
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87 |
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88 quitButton = new QPushButton(tr("Quit")); |
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89 |
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90 buttonBox = new QDialogButtonBox; |
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91 buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole); |
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92 buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); |
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93 |
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94 //! [1] |
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95 tcpSocket = new QTcpSocket(this); |
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96 //! [1] |
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97 |
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98 connect(hostLineEdit, SIGNAL(textChanged(QString)), |
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99 this, SLOT(enableGetFortuneButton())); |
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100 connect(portLineEdit, SIGNAL(textChanged(QString)), |
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101 this, SLOT(enableGetFortuneButton())); |
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102 connect(getFortuneButton, SIGNAL(clicked()), |
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103 this, SLOT(requestNewFortune())); |
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104 connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); |
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105 //! [2] //! [3] |
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106 connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune())); |
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107 //! [2] //! [4] |
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108 connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), |
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109 //! [3] |
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110 this, SLOT(displayError(QAbstractSocket::SocketError))); |
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111 //! [4] |
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112 |
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113 QGridLayout *mainLayout = new QGridLayout; |
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114 mainLayout->addWidget(hostLabel, 0, 0); |
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115 mainLayout->addWidget(hostLineEdit, 0, 1); |
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116 mainLayout->addWidget(portLabel, 1, 0); |
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117 mainLayout->addWidget(portLineEdit, 1, 1); |
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118 mainLayout->addWidget(statusLabel, 2, 0, 1, 2); |
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119 mainLayout->addWidget(buttonBox, 3, 0, 1, 2); |
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120 setLayout(mainLayout); |
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121 |
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122 setWindowTitle(tr("Fortune Client")); |
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123 portLineEdit->setFocus(); |
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124 |
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125 #ifdef Q_OS_SYMBIAN |
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126 isDefaultIapSet = false; |
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127 #endif |
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128 //! [5] |
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129 } |
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130 //! [5] |
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131 |
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132 //! [6] |
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133 void Client::requestNewFortune() |
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134 { |
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135 getFortuneButton->setEnabled(false); |
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136 #ifdef Q_OS_SYMBIAN |
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137 if(!isDefaultIapSet) { |
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138 qt_SetDefaultIap(); |
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139 isDefaultIapSet = true; |
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140 } |
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141 #endif |
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142 blockSize = 0; |
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143 tcpSocket->abort(); |
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144 //! [7] |
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145 tcpSocket->connectToHost(hostLineEdit->text(), |
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146 portLineEdit->text().toInt()); |
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147 //! [7] |
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148 } |
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149 //! [6] |
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150 |
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151 //! [8] |
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152 void Client::readFortune() |
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153 { |
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154 //! [9] |
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155 QDataStream in(tcpSocket); |
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156 in.setVersion(QDataStream::Qt_4_0); |
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157 |
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158 if (blockSize == 0) { |
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159 if (tcpSocket->bytesAvailable() < (int)sizeof(quint16)) |
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160 return; |
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161 //! [8] |
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162 |
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163 //! [10] |
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164 in >> blockSize; |
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165 } |
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166 |
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167 if (tcpSocket->bytesAvailable() < blockSize) |
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168 return; |
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169 //! [10] //! [11] |
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170 |
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171 QString nextFortune; |
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172 in >> nextFortune; |
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173 |
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174 if (nextFortune == currentFortune) { |
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175 QTimer::singleShot(0, this, SLOT(requestNewFortune())); |
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176 return; |
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177 } |
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178 //! [11] |
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179 |
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180 //! [12] |
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181 currentFortune = nextFortune; |
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182 //! [9] |
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183 statusLabel->setText(currentFortune); |
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184 getFortuneButton->setEnabled(true); |
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185 } |
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186 //! [12] |
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187 |
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188 //! [13] |
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189 void Client::displayError(QAbstractSocket::SocketError socketError) |
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190 { |
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191 switch (socketError) { |
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192 case QAbstractSocket::RemoteHostClosedError: |
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193 break; |
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194 case QAbstractSocket::HostNotFoundError: |
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195 QMessageBox::information(this, tr("Fortune Client"), |
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196 tr("The host was not found. Please check the " |
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197 "host name and port settings.")); |
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198 break; |
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199 case QAbstractSocket::ConnectionRefusedError: |
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200 QMessageBox::information(this, tr("Fortune Client"), |
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201 tr("The connection was refused by the peer. " |
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202 "Make sure the fortune server is running, " |
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203 "and check that the host name and port " |
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204 "settings are correct.")); |
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205 break; |
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206 default: |
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207 QMessageBox::information(this, tr("Fortune Client"), |
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208 tr("The following error occurred: %1.") |
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209 .arg(tcpSocket->errorString())); |
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210 } |
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211 |
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212 getFortuneButton->setEnabled(true); |
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213 } |
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214 //! [13] |
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215 |
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216 void Client::enableGetFortuneButton() |
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217 { |
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218 getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty() |
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219 && !portLineEdit->text().isEmpty()); |
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220 } |