qt 6.5.1 original

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

examples/network/broadcastreceiver/broadcastreceiver.pro

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+QT += network widgets
+requires(qtConfig(udpsocket))
+
+HEADERS       = receiver.h
+SOURCES       = receiver.cpp \
+                main.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/network/broadcastreceiver
+INSTALLS += target
+

examples/network/broadcastreceiver/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 "receiver.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Receiver receiver;
+    receiver.show();
+    return app.exec();
+}

examples/network/broadcastreceiver/receiver.cpp

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+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QLabel>
+#include <QPushButton>
+#include <QUdpSocket>
+#include <QVBoxLayout>
+#include <QCoreApplication>
+
+#include "receiver.h"
+
+Receiver::Receiver(QWidget *parent)
+    : QWidget(parent)
+{
+    statusLabel = new QLabel(tr("Listening for broadcasted messages"));
+    statusLabel->setWordWrap(true);
+
+    auto quitButton = new QPushButton(tr("&Quit"));
+
+//! [0]
+    udpSocket = new QUdpSocket(this);
+    udpSocket->bind(45454, QUdpSocket::ShareAddress);
+//! [0]
+
+//! [1]
+    connect(udpSocket, &QUdpSocket::readyRead,
+            this, &Receiver::processPendingDatagrams);
+//! [1]
+    connect(quitButton, &QPushButton::clicked,
+            qApp, &QCoreApplication::quit);
+
+    auto buttonLayout = new QHBoxLayout;
+    buttonLayout->addStretch(1);
+    buttonLayout->addWidget(quitButton);
+    buttonLayout->addStretch(1);
+
+    auto mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addLayout(buttonLayout);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Broadcast Receiver"));
+}
+
+void Receiver::processPendingDatagrams()
+{
+    QByteArray datagram;
+//! [2]
+    while (udpSocket->hasPendingDatagrams()) {
+        datagram.resize(int(udpSocket->pendingDatagramSize()));
+        udpSocket->readDatagram(datagram.data(), datagram.size());
+        statusLabel->setText(tr("Received datagram: \"%1\"")
+                             .arg(datagram.constData()));
+    }
+//! [2]
+}

examples/network/broadcastreceiver/receiver.h

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+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef RECEIVER_H
+#define RECEIVER_H
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QUdpSocket;
+QT_END_NAMESPACE
+
+class Receiver : public QWidget
+{
+    Q_OBJECT
+
+public:
+    explicit Receiver(QWidget *parent = nullptr);
+
+private slots:
+    void processPendingDatagrams();
+
+private:
+    QLabel *statusLabel = nullptr;
+    QUdpSocket *udpSocket = nullptr;
+};
+
+#endif