qt 6.5.1 original

examples/corelib/ipc/localfortuneclient/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(localfortuneclient LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/corelib/ipc/localfortuneclient")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Network Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(localfortuneclient
+    client.cpp client.h
+    main.cpp
+)
+
+set_target_properties(localfortuneclient PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(localfortuneclient PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Network
+    Qt6::Widgets
+)
+
+install(TARGETS localfortuneclient
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/corelib/ipc/localfortuneclient/client.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 "client.h"
+
+Client::Client(QWidget *parent)
+    : QDialog(parent),
+      hostLineEdit(new QLineEdit("fortune")),
+      getFortuneButton(new QPushButton(tr("Get Fortune"))),
+      statusLabel(new QLabel(tr("This examples requires that you run the "
+                                "Local Fortune Server example as well."))),
+      socket(new QLocalSocket(this))
+{
+    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+    QLabel *hostLabel = new QLabel(tr("&Server name:"));
+    hostLabel->setBuddy(hostLineEdit);
+
+    statusLabel->setWordWrap(true);
+
+    getFortuneButton->setDefault(true);
+    QPushButton *quitButton = new QPushButton(tr("Quit"));
+
+    QDialogButtonBox *buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);
+    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
+
+    in.setDevice(socket);
+    in.setVersion(QDataStream::Qt_5_10);
+
+    connect(hostLineEdit, &QLineEdit::textChanged,
+            this, &Client::enableGetFortuneButton);
+    connect(getFortuneButton, &QPushButton::clicked,
+            this, &Client::requestNewFortune);
+    connect(quitButton, &QPushButton::clicked, this, &Client::close);
+    connect(socket, &QLocalSocket::readyRead, this, &Client::readFortune);
+    connect(socket, &QLocalSocket::errorOccurred, this, &Client::displayError);
+
+    QGridLayout *mainLayout = new QGridLayout(this);
+    mainLayout->addWidget(hostLabel, 0, 0);
+    mainLayout->addWidget(hostLineEdit, 0, 1);
+    mainLayout->addWidget(statusLabel, 2, 0, 1, 2);
+    mainLayout->addWidget(buttonBox, 3, 0, 1, 2);
+
+    setWindowTitle(QGuiApplication::applicationDisplayName());
+    hostLineEdit->setFocus();
+}
+
+void Client::requestNewFortune()
+{
+    getFortuneButton->setEnabled(false);
+    blockSize = 0;
+    socket->abort();
+    socket->connectToServer(hostLineEdit->text());
+}
+
+void Client::readFortune()
+{
+    if (blockSize == 0) {
+        // Relies on the fact that QDataStream serializes a quint32 into
+        // sizeof(quint32) bytes
+        if (socket->bytesAvailable() < (int)sizeof(quint32))
+            return;
+        in >> blockSize;
+    }
+
+    if (socket->bytesAvailable() < blockSize || in.atEnd())
+        return;
+
+    QString nextFortune;
+    in >> nextFortune;
+
+    if (nextFortune == currentFortune) {
+        QTimer::singleShot(0, this, &Client::requestNewFortune);
+        return;
+    }
+
+    currentFortune = nextFortune;
+    statusLabel->setText(currentFortune);
+    getFortuneButton->setEnabled(true);
+}
+
+void Client::displayError(QLocalSocket::LocalSocketError socketError)
+{
+    switch (socketError) {
+    case QLocalSocket::ServerNotFoundError:
+        QMessageBox::information(this, tr("Local Fortune Client"),
+                                 tr("The host was not found. Please make sure "
+                                    "that the server is running and that the "
+                                    "server name is correct."));
+        break;
+    case QLocalSocket::ConnectionRefusedError:
+        QMessageBox::information(this, tr("Local Fortune Client"),
+                                 tr("The connection was refused by the peer. "
+                                    "Make sure the fortune server is running, "
+                                    "and check that the server name "
+                                    "is correct."));
+        break;
+    case QLocalSocket::PeerClosedError:
+        break;
+    default:
+        QMessageBox::information(this, tr("Local Fortune Client"),
+                                 tr("The following error occurred: %1.")
+                                 .arg(socket->errorString()));
+    }
+
+    getFortuneButton->setEnabled(true);
+}
+
+void Client::enableGetFortuneButton()
+{
+    getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty());
+}

examples/corelib/ipc/localfortuneclient/client.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include <QDialog>
+#include <QDataStream>
+#include <QLocalSocket>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QLineEdit;
+class QPushButton;
+QT_END_NAMESPACE
+
+class Client : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit Client(QWidget *parent = nullptr);
+
+private slots:
+    void requestNewFortune();
+    void readFortune();
+    void displayError(QLocalSocket::LocalSocketError socketError);
+    void enableGetFortuneButton();
+
+private:
+    QLineEdit *hostLineEdit;
+    QPushButton *getFortuneButton;
+    QLabel *statusLabel;
+
+    QLocalSocket *socket;
+    QDataStream in;
+    quint32 blockSize;
+
+    QString currentFortune;
+};
+
+#endif

examples/corelib/ipc/localfortuneclient/localfortuneclient.pro

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+HEADERS       = client.h
+SOURCES       = client.cpp \
+                main.cpp
+QT           += network widgets
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/corelib/ipc/localfortuneclient
+INSTALLS += target

examples/corelib/ipc/localfortuneclient/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 "client.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    QGuiApplication::setApplicationDisplayName(Client::tr("Local Fortune Client"));
+    Client client;
+    client.show();
+    return app.exec();
+}