sender.cpp Example File
network/broadcastsender/sender.cpp
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#include <QtGui>
#include <QtNetwork>
#include "sender.h"
Sender::Sender(QWidget *parent)
: QDialog(parent)
{
statusLabel = new QLabel(tr("Ready to broadcast datagrams on port 45454"));
startButton = new QPushButton(tr("&Start"));
quitButton = new QPushButton(tr("&Quit"));
timer = new QTimer(this);
udpSocket = new QUdpSocket(this);
messageNo = 1;
connect(startButton, SIGNAL(clicked()), this, SLOT(startBroadcasting()));
connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
connect(timer, SIGNAL(timeout()), this, SLOT(broadcastDatagram()));
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addStretch(1);
buttonLayout->addWidget(startButton);
buttonLayout->addWidget(quitButton);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(statusLabel);
mainLayout->addLayout(buttonLayout);
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));
QByteArray datagram = "Broadcast message " + QByteArray::number(messageNo);
udpSocket->writeDatagram(datagram.data(), datagram.size(),
QHostAddress::Broadcast, 45454);
++messageNo;
}