1#!/usr/bin/env python 2 3 4############################################################################# 5## 6## Copyright (C) 2013 Riverbank Computing Limited. 7## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). 8## All rights reserved. 9## 10## This file is part of the examples of PyQt. 11## 12## $QT_BEGIN_LICENSE:BSD$ 13## You may use this file under the terms of the BSD license as follows: 14## 15## "Redistribution and use in source and binary forms, with or without 16## modification, are permitted provided that the following conditions are 17## met: 18## * Redistributions of source code must retain the above copyright 19## notice, this list of conditions and the following disclaimer. 20## * Redistributions in binary form must reproduce the above copyright 21## notice, this list of conditions and the following disclaimer in 22## the documentation and/or other materials provided with the 23## distribution. 24## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor 25## the names of its contributors may be used to endorse or promote 26## products derived from this software without specific prior written 27## permission. 28## 29## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 40## $QT_END_LICENSE$ 41## 42############################################################################# 43 44 45from PyQt5.QtWidgets import (QApplication, QDialog, QHBoxLayout, QLabel, 46 QPushButton, QVBoxLayout) 47from PyQt5.QtNetwork import QUdpSocket 48 49 50class Receiver(QDialog): 51 def __init__(self, parent=None): 52 super(Receiver, self).__init__(parent) 53 54 self.statusLabel = QLabel("Listening for broadcasted messages") 55 quitButton = QPushButton("&Quit") 56 57 self.udpSocket = QUdpSocket(self) 58 self.udpSocket.bind(45454) 59 60 self.udpSocket.readyRead.connect(self.processPendingDatagrams) 61 quitButton.clicked.connect(self.close) 62 63 buttonLayout = QHBoxLayout() 64 buttonLayout.addStretch(1) 65 buttonLayout.addWidget(quitButton) 66 buttonLayout.addStretch(1) 67 68 mainLayout = QVBoxLayout() 69 mainLayout.addWidget(self.statusLabel) 70 mainLayout.addLayout(buttonLayout) 71 self.setLayout(mainLayout) 72 73 self.setWindowTitle("Broadcast Receiver") 74 75 def processPendingDatagrams(self): 76 while self.udpSocket.hasPendingDatagrams(): 77 datagram, host, port = self.udpSocket.readDatagram(self.udpSocket.pendingDatagramSize()) 78 79 try: 80 # Python v3. 81 datagram = str(datagram, encoding='ascii') 82 except TypeError: 83 # Python v2. 84 pass 85 86 self.statusLabel.setText("Received datagram: \"%s\"" % datagram) 87 88 89if __name__ == '__main__': 90 91 import sys 92 93 app = QApplication(sys.argv) 94 receiver = Receiver() 95 receiver.show() 96 sys.exit(receiver.exec_()) 97