receiver.cpp 范例文件

broadcastreceiver/receiver.cpp
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#include <QtWidgets> #include <QtNetwork> #include "receiver.h" Receiver::Receiver(QWidget *parent) : QWidget(parent) { statusLabel = new QLabel(tr("Listening for broadcasted messages")); statusLabel->setWordWrap(true); quitButton = new QPushButton(tr("&Quit")); udpSocket = new QUdpSocket(this); udpSocket->bind(45454, QUdpSocket::ShareAddress); 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())); } }