/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. 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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) , hostCombo(new QComboBox) , portLineEdit(new QLineEdit) , getFortuneButton(new QPushButton(tr("Get Fortune"))) , tcpSocket(new QTcpSocket(this)) { setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint); //! [0] hostCombo->setEditable(true); // find out name of this machine QString name = QHostInfo::localHostName(); if (!name.isEmpty()) { hostCombo->addItem(name); QString domain = QHostInfo::localDomainName(); if (!domain.isEmpty()) hostCombo->addItem(name + QChar('.') + domain); } if (name != QLatin1String("localhost")) hostCombo->addItem(QString("localhost")); // find out IP addresses of this machine QList ipAddressesList = QNetworkInterface::allAddresses(); // add non-localhost addresses for (int i = 0; i < ipAddressesList.size(); ++i) { if (!ipAddressesList.at(i).isLoopback()) hostCombo->addItem(ipAddressesList.at(i).toString()); } // add localhost addresses for (int i = 0; i < ipAddressesList.size(); ++i) { if (ipAddressesList.at(i).isLoopback()) hostCombo->addItem(ipAddressesList.at(i).toString()); } portLineEdit->setValidator(new QIntValidator(1, 65535, this)); auto hostLabel = new QLabel(tr("&Server name:")); hostLabel->setBuddy(hostCombo); auto portLabel = new QLabel(tr("S&erver port:")); portLabel->setBuddy(portLineEdit); statusLabel = new QLabel(tr("This examples requires that you run the " "Fortune Server example as well.")); getFortuneButton->setDefault(true); getFortuneButton->setEnabled(false); auto quitButton = new QPushButton(tr("Quit")); auto buttonBox = new QDialogButtonBox; buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole); buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); //! [1] in.setDevice(tcpSocket); in.setVersion(QDataStream::Qt_4_0); //! [1] connect(hostCombo, &QComboBox::editTextChanged, this, &Client::enableGetFortuneButton); connect(portLineEdit, &QLineEdit::textChanged, this, &Client::enableGetFortuneButton); connect(getFortuneButton, &QAbstractButton::clicked, this, &Client::requestNewFortune); connect(quitButton, &QAbstractButton::clicked, this, &QWidget::close); //! [2] //! [3] connect(tcpSocket, &QIODevice::readyRead, this, &Client::readFortune); //! [2] //! [4] connect(tcpSocket, QOverload::of(&QAbstractSocket::error), //! [3] this, &Client::displayError); //! [4] QGridLayout *mainLayout = nullptr; if (QGuiApplication::styleHints()->showIsFullScreen() || QGuiApplication::styleHints()->showIsMaximized()) { auto outerVerticalLayout = new QVBoxLayout(this); outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding)); auto outerHorizontalLayout = new QHBoxLayout; outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored)); auto groupBox = new QGroupBox(QGuiApplication::applicationDisplayName()); mainLayout = new QGridLayout(groupBox); outerHorizontalLayout->addWidget(groupBox); outerHorizontalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::Ignored)); outerVerticalLayout->addLayout(outerHorizontalLayout); outerVerticalLayout->addItem(new QSpacerItem(0, 0, QSizePolicy::Ignored, QSizePolicy::MinimumExpanding)); } else { mainLayout = new QGridLayout(this); } mainLayout->addWidget(hostLabel, 0, 0); mainLayout->addWidget(hostCombo, 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); setWindowTitle(QGuiApplication::applicationDisplayName()); portLineEdit->setFocus(); QNetworkConfigurationManager manager; if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) { // Get saved network configuration QSettings settings(QSettings::UserScope, QLatin1String("QtProject")); 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, &QNetworkSession::opened, this, &Client::sessionOpened); getFortuneButton->setEnabled(false); statusLabel->setText(tr("Opening network session.")); networkSession->open(); } //! [5] } //! [5] //! [6] void Client::requestNewFortune() { getFortuneButton->setEnabled(false); tcpSocket->abort(); //! [7] tcpSocket->connectToHost(hostCombo->currentText(), portLineEdit->text().toInt()); //! [7] } //! [6] //! [8] void Client::readFortune() { in.startTransaction(); QString nextFortune; in >> nextFortune; if (!in.commitTransaction()) return; if (nextFortune == currentFortune) { QTimer::singleShot(0, this, &Client::requestNewFortune); return; } currentFortune = nextFortune; statusLabel->setText(currentFortune); getFortuneButton->setEnabled(true); } //! [8] //! [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()) && !hostCombo->currentText().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("QtProject")); 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(); }