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++ // Copyright (C) 2017 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QtWidgets>
++ #include <QtNetwork>
++ #include <QtCore>
++
++ #include "sender.h"
++
++ Sender::Sender(QWidget *parent)
++ : QWidget(parent)
++ {
++ statusLabel = new QLabel(tr("Ready to broadcast datagrams on port 45454"));
++ statusLabel->setWordWrap(true);
++
++ startButton = new QPushButton(tr("&Start"));
++ auto quitButton = new QPushButton(tr("&Quit"));
++
++ auto buttonBox = new QDialogButtonBox;
++ buttonBox->addButton(startButton, QDialogButtonBox::ActionRole);
++ buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
++
++ //! [0]
++ udpSocket = new QUdpSocket(this);
++ //! [0]
++
++ connect(startButton, &QPushButton::clicked, this, &Sender::startBroadcasting);
++ connect(quitButton, &QPushButton::clicked, qApp, &QCoreApplication::quit);
++ connect(&timer, &QTimer::timeout, this, &Sender::broadcastDatagram);
++
++ auto mainLayout = new QVBoxLayout;
++ mainLayout->addWidget(statusLabel);
++ mainLayout->addWidget(buttonBox);
++ setLayout(mainLayout);
++
++ setWindowTitle(tr("Broadcast Sender"));
++ }
++
++ void Sender::startBroadcasting()
++ {
++ startButton->setEnabled(false);
++ timer.start(1000);
++ }
++
++ void Sender::broadcastDatagram()
++ {
++ statusLabel->setText(tr("Now broadcasting datagram %1").arg(messageNo));
++ //! [1]
++ QByteArray datagram = "Broadcast message " + QByteArray::number(messageNo);
++ udpSocket->writeDatagram(datagram, QHostAddress::Broadcast, 45454);
++ //! [1]
++ ++messageNo;
++ }