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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd and its Subsidiary(-ies) nor the
**     names of its contributors may be used to endorse or promote products
**     derived from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtWidgets>
#include <QtNetwork>

#include "sender.h"

Sender::Sender(QWidget *parent)
    : QDialog(parent)
{
    groupAddress = QHostAddress("239.255.43.21");

    statusLabel = new QLabel(tr("Ready to multicast datagrams to group %1 on port 45454").arg(groupAddress.toString()));

    ttlLabel = new QLabel(tr("TTL for multicast datagrams:"));
    ttlSpinBox = new QSpinBox;
    ttlSpinBox->setRange(0, 255);

    QHBoxLayout *ttlLayout = new QHBoxLayout;
    ttlLayout->addWidget(ttlLabel);
    ttlLayout->addWidget(ttlSpinBox);

    startButton = new QPushButton(tr("&Start"));
    quitButton = new QPushButton(tr("&Quit"));

    buttonBox = new QDialogButtonBox;
    buttonBox->addButton(startButton, QDialogButtonBox::ActionRole);
    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

    timer = new QTimer(this);
    udpSocket = new QUdpSocket(this);
    messageNo = 1;

    connect(ttlSpinBox, SIGNAL(valueChanged(int)), this, SLOT(ttlChanged(int)));
    connect(startButton, SIGNAL(clicked()), this, SLOT(startSending()));
    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
    connect(timer, SIGNAL(timeout()), this, SLOT(sendDatagram()));

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

    setWindowTitle(tr("Multicast Sender"));
    ttlSpinBox->setValue(1);
}

void Sender::ttlChanged(int newTtl)
{
    udpSocket->setSocketOption(QAbstractSocket::MulticastTtlOption, newTtl);
}

void Sender::startSending()
{
    startButton->setEnabled(false);
    timer->start(1000);
}

void Sender::sendDatagram()
{
    statusLabel->setText(tr("Now sending datagram %1").arg(messageNo));
    QByteArray datagram = "Multicast message " + QByteArray::number(messageNo);
    udpSocket->writeDatagram(datagram.data(), datagram.size(),
                             groupAddress, 45454);
    ++messageNo;
}