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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 example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #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);
        buttonLayout->addStretch(1);

        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()));
        }
    }