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# receiver.cpp Example File
network/broadcastreceiver/receiver.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
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        ** License version 2.0 as published by the Free Software Foundation
        ** and appearing in the file LICENSE.GPL included in the packaging of
        ** this file.  Please review the following information to ensure GNU
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        ** review the following information:
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        #include <QtGui>
        #include <QtNetwork>

        #include "receiver.h"

        Receiver::Receiver(QWidget *parent)
            : QDialog(parent)
        {
            statusLabel = new QLabel(tr("Listening for broadcasted messages"));
            quitButton = new QPushButton(tr("&Quit"));

            udpSocket = new QUdpSocket(this);
            udpSocket->bind(45454);

            connect(udpSocket, SIGNAL(readyRead()),
                    this, SLOT(processPendingDatagrams()));
            connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

            QHBoxLayout *buttonLayout = new QHBoxLayout;
            buttonLayout->addStretch(1);
            buttonLayout->addWidget(quitButton);

            QVBoxLayout *mainLayout = new QVBoxLayout;
            mainLayout->addWidget(statusLabel);
            mainLayout->addLayout(buttonLayout);
            setLayout(mainLayout);

            setWindowTitle(tr("Broadcast Receiver"));
        }

        void Receiver::processPendingDatagrams()
        {
            while (udpSocket->hasPendingDatagrams()) {
                QByteArray datagram;
                datagram.resize(udpSocket->pendingDatagramSize());
                udpSocket->readDatagram(datagram.data(), datagram.size());
                statusLabel->setText(tr("Received datagram: \"%1\"")
                                     .arg(datagram.data()));
            }
        }