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| |
| #include <QtWidgets> |
| #include <QtNetwork> |
| |
| #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<QHostAddress> 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<QAbstractSocket::SocketError>::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(); |
| } |
| |
