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57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
// Copyright (C) 2017 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include <QLabel>
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#include <QPushButton>
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#include <QUdpSocket>
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#include <QVBoxLayout>
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#include <QCoreApplication>
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#include "receiver.h"
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Receiver::Receiver(QWidget *parent)
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: QWidget(parent)
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{
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statusLabel = new QLabel(tr("Listening for broadcasted messages"));
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statusLabel->setWordWrap(true);
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auto quitButton = new QPushButton(tr("&Quit"));
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//! [0]
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udpSocket = new QUdpSocket(this);
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udpSocket->bind(45454, QUdpSocket::ShareAddress);
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//! [0]
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//! [1]
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connect(udpSocket, &QUdpSocket::readyRead,
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this, &Receiver::processPendingDatagrams);
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//! [1]
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connect(quitButton, &QPushButton::clicked,
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qApp, &QCoreApplication::quit);
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auto buttonLayout = new QHBoxLayout;
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buttonLayout->addStretch(1);
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buttonLayout->addWidget(quitButton);
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buttonLayout->addStretch(1);
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auto mainLayout = new QVBoxLayout;
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mainLayout->addWidget(statusLabel);
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mainLayout->addLayout(buttonLayout);
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setLayout(mainLayout);
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setWindowTitle(tr("Broadcast Receiver"));
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}
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void Receiver::processPendingDatagrams()
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{
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QByteArray datagram;
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//! [2]
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while (udpSocket->hasPendingDatagrams()) {
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datagram.resize(int(udpSocket->pendingDatagramSize()));
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udpSocket->readDatagram(datagram.data(), datagram.size());
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statusLabel->setText(tr("Received datagram: \"%1\"")
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.arg(datagram.constData()));
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}
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//! [2]
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}
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