/**************************************************************************** ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor ** the names of its contributors may be used to endorse or promote ** products derived from this software without specific prior written ** permission. ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #include "client.h" //! [0] Client::Client(QWidget *parent) : QDialog(parent), networkSession(0) { //! [0] hostLabel = new QLabel(tr("&Server name:")); portLabel = new QLabel(tr("S&erver port:")); // find out which IP to connect to QString ipAddress; QList ipAddressesList = QNetworkInterface::allAddresses(); // use the first non-localhost IPv4 address for (int i = 0; i < ipAddressesList.size(); ++i) { if (ipAddressesList.at(i) != QHostAddress::LocalHost && ipAddressesList.at(i).toIPv4Address()) { ipAddress = ipAddressesList.at(i).toString(); break; } } // if we did not find one, use IPv4 localhost if (ipAddress.isEmpty()) ipAddress = QHostAddress(QHostAddress::LocalHost).toString(); hostLineEdit = new QLineEdit(ipAddress); portLineEdit = new QLineEdit; portLineEdit->setValidator(new QIntValidator(1, 65535, this)); hostLabel->setBuddy(hostLineEdit); portLabel->setBuddy(portLineEdit); statusLabel = new QLabel(tr("This examples requires that you run the " "Fortune Server example as well.")); getFortuneButton = new QPushButton(tr("Get Fortune")); getFortuneButton->setDefault(true); getFortuneButton->setEnabled(false); quitButton = new QPushButton(tr("Quit")); buttonBox = new QDialogButtonBox; buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole); buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); //! [1] tcpSocket = new QTcpSocket(this); //! [1] connect(hostLineEdit, SIGNAL(textChanged(QString)), this, SLOT(enableGetFortuneButton())); connect(portLineEdit, SIGNAL(textChanged(QString)), this, SLOT(enableGetFortuneButton())); connect(getFortuneButton, SIGNAL(clicked()), this, SLOT(requestNewFortune())); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); //! [2] //! [3] connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune())); //! [2] //! [4] connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), //! [3] this, SLOT(displayError(QAbstractSocket::SocketError))); //! [4] QGridLayout *mainLayout = new QGridLayout; mainLayout->addWidget(hostLabel, 0, 0); mainLayout->addWidget(hostLineEdit, 0, 1); mainLayout->addWidget(portLabel, 1, 0); mainLayout->addWidget(portLineEdit, 1, 1); mainLayout->addWidget(statusLabel, 2, 0, 1, 2); mainLayout->addWidget(buttonBox, 3, 0, 1, 2); setLayout(mainLayout); setWindowTitle(tr("Fortune Client")); portLineEdit->setFocus(); QNetworkConfigurationManager manager; if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) { // Get saved network configuration QSettings settings(QSettings::UserScope, QLatin1String("Trolltech")); settings.beginGroup(QLatin1String("QtNetwork")); const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString(); settings.endGroup(); // If the saved network configuration is not currently discovered use the system default QNetworkConfiguration config = manager.configurationFromIdentifier(id); if ((config.state() & QNetworkConfiguration::Discovered) != QNetworkConfiguration::Discovered) { config = manager.defaultConfiguration(); } networkSession = new QNetworkSession(config, this); connect(networkSession, SIGNAL(opened()), this, SLOT(sessionOpened())); getFortuneButton->setEnabled(false); statusLabel->setText(tr("Opening network session.")); networkSession->open(); } //! [5] } //! [5] //! [6] void Client::requestNewFortune() { getFortuneButton->setEnabled(false); blockSize = 0; tcpSocket->abort(); //! [7] tcpSocket->connectToHost(hostLineEdit->text(), portLineEdit->text().toInt()); //! [7] } //! [6] //! [8] void Client::readFortune() { //! [9] QDataStream in(tcpSocket); in.setVersion(QDataStream::Qt_4_0); if (blockSize == 0) { if (tcpSocket->bytesAvailable() < (int)sizeof(quint16)) return; //! [8] //! [10] in >> blockSize; } if (tcpSocket->bytesAvailable() < blockSize) return; //! [10] //! [11] QString nextFortune; in >> nextFortune; if (nextFortune == currentFortune) { QTimer::singleShot(0, this, SLOT(requestNewFortune())); return; } //! [11] //! [12] currentFortune = nextFortune; //! [9] statusLabel->setText(currentFortune); getFortuneButton->setEnabled(true); } //! [12] //! [13] void Client::displayError(QAbstractSocket::SocketError socketError) { switch (socketError) { case QAbstractSocket::RemoteHostClosedError: break; case QAbstractSocket::HostNotFoundError: QMessageBox::information(this, tr("Fortune Client"), tr("The host was not found. Please check the " "host name and port settings.")); break; case QAbstractSocket::ConnectionRefusedError: QMessageBox::information(this, tr("Fortune Client"), tr("The connection was refused by the peer. " "Make sure the fortune server is running, " "and check that the host name and port " "settings are correct.")); break; default: QMessageBox::information(this, tr("Fortune Client"), tr("The following error occurred: %1.") .arg(tcpSocket->errorString())); } getFortuneButton->setEnabled(true); } //! [13] void Client::enableGetFortuneButton() { getFortuneButton->setEnabled((!networkSession || networkSession->isOpen()) && !hostLineEdit->text().isEmpty() && !portLineEdit->text().isEmpty()); } void Client::sessionOpened() { // Save the used configuration QNetworkConfiguration config = networkSession->configuration(); QString id; if (config.type() == QNetworkConfiguration::UserChoice) id = networkSession->sessionProperty(QLatin1String("UserChoiceConfiguration")).toString(); else id = config.identifier(); QSettings settings(QSettings::UserScope, QLatin1String("Trolltech")); settings.beginGroup(QLatin1String("QtNetwork")); settings.setValue(QLatin1String("DefaultNetworkConfiguration"), id); settings.endGroup(); statusLabel->setText(tr("This examples requires that you run the " "Fortune Server example as well.")); enableGetFortuneButton(); }