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Diffstat (limited to 'examples/network/blockingfortuneclient/blockingclient.cpp')
| -rw-r--r-- | examples/network/blockingfortuneclient/blockingclient.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/examples/network/blockingfortuneclient/blockingclient.cpp b/examples/network/blockingfortuneclient/blockingclient.cpp new file mode 100644 index 0000000000..f5def3d927 --- /dev/null +++ b/examples/network/blockingfortuneclient/blockingclient.cpp @@ -0,0 +1,168 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 <QtGui> +#include <QtNetwork> + +#include "blockingclient.h" + +BlockingClient::BlockingClient(QWidget *parent) + : QDialog(parent) +{ + hostLabel = new QLabel(tr("&Server name:")); + portLabel = new QLabel(tr("S&erver port:")); + + // find out which IP to connect to + QString ipAddress; + QList<QHostAddress> 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); + + 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())); +//! [0] + connect(&thread, SIGNAL(newFortune(QString)), + this, SLOT(showFortune(QString))); +//! [0] //! [1] + connect(&thread, SIGNAL(error(int,QString)), + this, SLOT(displayError(int,QString))); +//! [1] + + 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("Blocking Fortune Client")); + portLineEdit->setFocus(); +} + +//! [2] +void BlockingClient::requestNewFortune() +{ + getFortuneButton->setEnabled(false); + thread.requestNewFortune(hostLineEdit->text(), + portLineEdit->text().toInt()); +} +//! [2] + +//! [3] +void BlockingClient::showFortune(const QString &nextFortune) +{ + if (nextFortune == currentFortune) { + requestNewFortune(); + return; + } +//! [3] + +//! [4] + currentFortune = nextFortune; + statusLabel->setText(currentFortune); + getFortuneButton->setEnabled(true); +} +//! [4] + +void BlockingClient::displayError(int socketError, const QString &message) +{ + switch (socketError) { + case QAbstractSocket::HostNotFoundError: + QMessageBox::information(this, tr("Blocking Fortune Client"), + tr("The host was not found. Please check the " + "host and port settings.")); + break; + case QAbstractSocket::ConnectionRefusedError: + QMessageBox::information(this, tr("Blocking 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("Blocking Fortune Client"), + tr("The following error occurred: %1.") + .arg(message)); + } + + getFortuneButton->setEnabled(true); +} + +void BlockingClient::enableGetFortuneButton() +{ + getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty() + && !portLineEdit->text().isEmpty()); +} |