blockingclient.cpp Example File
network/blockingfortuneclient/blockingclient.cpp/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** 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 The Qt Company Ltd 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) : QWidget(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)); #if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR) Qt::InputMethodHint hints = Qt::ImhDigitsOnly; portLineEdit->setInputMethodHints(hints); #endif hostLabel->setBuddy(hostLineEdit); portLabel->setBuddy(portLineEdit); statusLabel = new QLabel(tr("This examples requires that you run the " "Fortune Server example as well.")); statusLabel->setWordWrap(true); #ifdef Q_OS_SYMBIAN QMenu *menu = new QMenu(this); fortuneAction = menu->addAction(tr("Get Fortune")); fortuneAction->setVisible(false); QAction *optionsAction = new QAction(tr("Options"), this); optionsAction->setMenu(menu); optionsAction->setSoftKeyRole(QAction::PositiveSoftKey); addAction(optionsAction); exitAction = new QAction(tr("Exit"), this); exitAction->setSoftKeyRole(QAction::NegativeSoftKey); addAction(exitAction); connect(fortuneAction, SIGNAL(triggered()), this, SLOT(requestNewFortune())); connect(exitAction, SIGNAL(triggered()), this, SLOT(close())); #else 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(getFortuneButton, SIGNAL(clicked()), this, SLOT(requestNewFortune())); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); #endif connect(hostLineEdit, SIGNAL(textChanged(QString)), this, SLOT(enableGetFortuneButton())); connect(portLineEdit, SIGNAL(textChanged(QString)), this, SLOT(enableGetFortuneButton())); connect(&thread, SIGNAL(newFortune(QString)), this, SLOT(showFortune(QString))); connect(&thread, SIGNAL(error(int,QString)), this, SLOT(displayError(int,QString))); 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); #ifndef Q_OS_SYMBIAN mainLayout->addWidget(buttonBox, 3, 0, 1, 2); #endif setLayout(mainLayout); setWindowTitle(tr("Blocking Fortune Client")); portLineEdit->setFocus(); } void BlockingClient::requestNewFortune() { #ifdef Q_OS_SYMBIAN fortuneAction->setVisible(false); #else getFortuneButton->setEnabled(false); #endif thread.requestNewFortune(hostLineEdit->text(), portLineEdit->text().toInt()); } void BlockingClient::showFortune(const QString &nextFortune) { if (nextFortune == currentFortune) { requestNewFortune(); return; } currentFortune = nextFortune; statusLabel->setText(currentFortune); #ifdef Q_OS_SYMBIAN fortuneAction->setVisible(true); #else getFortuneButton->setEnabled(true); #endif } 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)); } #ifdef Q_OS_SYMBIAN fortuneAction->setVisible(true); #else getFortuneButton->setEnabled(true); #endif } void BlockingClient::enableGetFortuneButton() { bool enable(!hostLineEdit->text().isEmpty() && !portLineEdit->text().isEmpty()); #ifdef Q_OS_SYMBIAN fortuneAction->setVisible(enable); #else getFortuneButton->setEnabled(enable); #endif }
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