qt 6.5.1 original

examples/network/blockingfortuneclient/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(blockingfortuneclient LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/network/blockingfortuneclient")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Network Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(blockingfortuneclient
+    blockingclient.cpp blockingclient.h
+    fortunethread.cpp fortunethread.h
+    main.cpp
+)
+
+set_target_properties(blockingfortuneclient PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(blockingfortuneclient PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Network
+    Qt6::Widgets
+)
+
+install(TARGETS blockingfortuneclient
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/network/blockingfortuneclient/blockingclient.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtWidgets>
+#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;
+    const QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
+    // use the first non-localhost IPv4 address
+    for (const QHostAddress &entry : ipAddressesList) {
+        if (entry != QHostAddress::LocalHost && entry.toIPv4Address()) {
+            ipAddress = entry.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."));
+    statusLabel->setWordWrap(true);
+
+    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, &QPushButton::clicked,
+            this, &BlockingClient::requestNewFortune);
+    connect(quitButton, &QPushButton::clicked,
+            this, &BlockingClient::close);
+
+    connect(hostLineEdit, &QLineEdit::textChanged,
+            this, &BlockingClient::enableGetFortuneButton);
+    connect(portLineEdit, &QLineEdit::textChanged,
+            this, &BlockingClient::enableGetFortuneButton);
+//! [0]
+    connect(&thread, &FortuneThread::newFortune,
+            this, &BlockingClient::showFortune);
+    connect(&thread, &FortuneThread::error,
+            this, &BlockingClient::displayError);
+//! [0]
+
+    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();
+}
+
+//! [1]
+void BlockingClient::requestNewFortune()
+{
+    getFortuneButton->setEnabled(false);
+    thread.requestNewFortune(hostLineEdit->text(),
+                             portLineEdit->text().toInt());
+}
+//! [1]
+
+//! [2]
+void BlockingClient::showFortune(const QString &nextFortune)
+{
+    if (nextFortune == currentFortune) {
+        requestNewFortune();
+        return;
+    }
+//! [2]
+
+//! [3]
+    currentFortune = nextFortune;
+    statusLabel->setText(currentFortune);
+    getFortuneButton->setEnabled(true);
+}
+//! [3]
+
+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()
+{
+    bool enable(!hostLineEdit->text().isEmpty() && !portLineEdit->text().isEmpty());
+    getFortuneButton->setEnabled(enable);
+}

examples/network/blockingfortuneclient/blockingclient.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BLOCKINGCLIENT_H
+#define BLOCKINGCLIENT_H
+
+#include <QWidget>
+
+#include "fortunethread.h"
+
+QT_BEGIN_NAMESPACE
+class QDialogButtonBox;
+class QLabel;
+class QLineEdit;
+class QPushButton;
+class QAction;
+QT_END_NAMESPACE
+
+//! [0]
+class BlockingClient : public QWidget
+{
+    Q_OBJECT
+
+public:
+    BlockingClient(QWidget *parent = nullptr);
+
+private slots:
+    void requestNewFortune();
+    void showFortune(const QString &fortune);
+    void displayError(int socketError, const QString &message);
+    void enableGetFortuneButton();
+
+private:
+    QLabel *hostLabel;
+    QLabel *portLabel;
+    QLineEdit *hostLineEdit;
+    QLineEdit *portLineEdit;
+    QLabel *statusLabel;
+    QPushButton *getFortuneButton;
+    QPushButton *quitButton;
+    QDialogButtonBox *buttonBox;
+
+    FortuneThread thread;
+    QString currentFortune;
+};
+//! [0]
+
+#endif

examples/network/blockingfortuneclient/blockingfortuneclient.pro

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+QT += network widgets
+
+HEADERS       = blockingclient.h \
+                fortunethread.h
+SOURCES       = blockingclient.cpp \
+                main.cpp \
+                fortunethread.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/network/blockingfortuneclient
+INSTALLS += target
+

examples/network/blockingfortuneclient/fortunethread.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtNetwork>
+
+#include "fortunethread.h"
+
+FortuneThread::FortuneThread(QObject *parent)
+    : QThread(parent), quit(false)
+{
+}
+
+//! [0]
+FortuneThread::~FortuneThread()
+{
+    mutex.lock();
+    quit = true;
+    cond.wakeOne();
+    mutex.unlock();
+    wait();
+}
+//! [0]
+
+//! [1] //! [2]
+void FortuneThread::requestNewFortune(const QString &hostName, quint16 port)
+{
+//! [1]
+    QMutexLocker locker(&mutex);
+    this->hostName = hostName;
+    this->port = port;
+//! [3]
+    if (!isRunning())
+        start();
+    else
+        cond.wakeOne();
+}
+//! [2] //! [3]
+
+//! [4]
+void FortuneThread::run()
+{
+    mutex.lock();
+//! [4] //! [5]
+    QString serverName = hostName;
+    quint16 serverPort = port;
+    mutex.unlock();
+//! [5]
+
+//! [6]
+    while (!quit) {
+//! [7]
+        const int Timeout = 5 * 1000;
+
+        QTcpSocket socket;
+        socket.connectToHost(serverName, serverPort);
+//! [6] //! [8]
+
+        if (!socket.waitForConnected(Timeout)) {
+            emit error(socket.error(), socket.errorString());
+            return;
+        }
+//! [8] //! [11]
+
+        QDataStream in(&socket);
+        in.setVersion(QDataStream::Qt_6_5);
+        QString fortune;
+//! [11] //! [12]
+
+        do {
+            if (!socket.waitForReadyRead(Timeout)) {
+                emit error(socket.error(), socket.errorString());
+                return;
+            }
+
+            in.startTransaction();
+            in >> fortune;
+        } while (!in.commitTransaction());
+//! [12] //! [15]
+
+        mutex.lock();
+        emit newFortune(fortune);
+//! [7]
+
+        cond.wait(&mutex);
+        serverName = hostName;
+        serverPort = port;
+        mutex.unlock();
+    }
+//! [15]
+}

examples/network/blockingfortuneclient/fortunethread.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef FORTUNETHREAD_H
+#define FORTUNETHREAD_H
+
+#include <QThread>
+#include <QMutex>
+#include <QWaitCondition>
+
+//! [0]
+class FortuneThread : public QThread
+{
+    Q_OBJECT
+
+public:
+    FortuneThread(QObject *parent = nullptr);
+    ~FortuneThread();
+
+    void requestNewFortune(const QString &hostName, quint16 port);
+    void run() override;
+
+signals:
+    void newFortune(const QString &fortune);
+    void error(int socketError, const QString &message);
+
+private:
+    QString hostName;
+    quint16 port;
+    QMutex mutex;
+    QWaitCondition cond;
+    bool quit;
+};
+//! [0]
+
+#endif

examples/network/blockingfortuneclient/main.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QApplication>
+
+#include "blockingclient.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    BlockingClient client;
+    client.show();
+    return app.exec();
+}