1 2############################################################################# 3## 4## Copyright (C) 2013 Riverbank Computing Limited. 5## Copyright (C) 2016 The Qt Company Ltd. 6## Contact: http://www.qt.io/licensing/ 7## 8## This file is part of the Qt for Python examples of the Qt Toolkit. 9## 10## $QT_BEGIN_LICENSE:BSD$ 11## You may use this file under the terms of the BSD license as follows: 12## 13## "Redistribution and use in source and binary forms, with or without 14## modification, are permitted provided that the following conditions are 15## met: 16## * Redistributions of source code must retain the above copyright 17## notice, this list of conditions and the following disclaimer. 18## * Redistributions in binary form must reproduce the above copyright 19## notice, this list of conditions and the following disclaimer in 20## the documentation and/or other materials provided with the 21## distribution. 22## * Neither the name of The Qt Company Ltd nor the names of its 23## contributors may be used to endorse or promote products derived 24## from this software without specific prior written permission. 25## 26## 27## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 30## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 32## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 33## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 35## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 36## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 37## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 38## 39## $QT_END_LICENSE$ 40## 41############################################################################# 42 43"""PySide2 port of the network/fortuneclient example from Qt v5.x""" 44 45from PySide2 import QtCore, QtGui, QtWidgets, QtNetwork 46 47 48class Client(QtWidgets.QDialog): 49 def __init__(self, parent=None): 50 super(Client, self).__init__(parent) 51 52 self.blockSize = 0 53 self.currentFortune = '' 54 55 hostLabel = QtWidgets.QLabel("&Server name:") 56 portLabel = QtWidgets.QLabel("S&erver port:") 57 58 self.hostLineEdit = QtWidgets.QLineEdit('Localhost') 59 self.portLineEdit = QtWidgets.QLineEdit() 60 self.portLineEdit.setValidator(QtGui.QIntValidator(1, 65535, self)) 61 62 hostLabel.setBuddy(self.hostLineEdit) 63 portLabel.setBuddy(self.portLineEdit) 64 65 self.statusLabel = QtWidgets.QLabel("This examples requires that you run " 66 "the Fortune Server example as well.") 67 68 self.getFortuneButton = QtWidgets.QPushButton("Get Fortune") 69 self.getFortuneButton.setDefault(True) 70 self.getFortuneButton.setEnabled(False) 71 72 quitButton = QtWidgets.QPushButton("Quit") 73 74 buttonBox = QtWidgets.QDialogButtonBox() 75 buttonBox.addButton(self.getFortuneButton, 76 QtWidgets.QDialogButtonBox.ActionRole) 77 buttonBox.addButton(quitButton, QtWidgets.QDialogButtonBox.RejectRole) 78 79 self.tcpSocket = QtNetwork.QTcpSocket(self) 80 81 self.hostLineEdit.textChanged.connect(self.enableGetFortuneButton) 82 self.portLineEdit.textChanged.connect(self.enableGetFortuneButton) 83 self.getFortuneButton.clicked.connect(self.requestNewFortune) 84 quitButton.clicked.connect(self.close) 85 self.tcpSocket.readyRead.connect(self.readFortune) 86 self.tcpSocket.error.connect(self.displayError) 87 88 mainLayout = QtWidgets.QGridLayout() 89 mainLayout.addWidget(hostLabel, 0, 0) 90 mainLayout.addWidget(self.hostLineEdit, 0, 1) 91 mainLayout.addWidget(portLabel, 1, 0) 92 mainLayout.addWidget(self.portLineEdit, 1, 1) 93 mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2) 94 mainLayout.addWidget(buttonBox, 3, 0, 1, 2) 95 self.setLayout(mainLayout) 96 97 self.setWindowTitle("Fortune Client") 98 self.portLineEdit.setFocus() 99 100 def requestNewFortune(self): 101 self.getFortuneButton.setEnabled(False) 102 self.blockSize = 0 103 self.tcpSocket.abort() 104 self.tcpSocket.connectToHost(self.hostLineEdit.text(), 105 int(self.portLineEdit.text())) 106 107 def readFortune(self): 108 instr = QtCore.QDataStream(self.tcpSocket) 109 instr.setVersion(QtCore.QDataStream.Qt_4_0) 110 111 if self.blockSize == 0: 112 if self.tcpSocket.bytesAvailable() < 2: 113 return 114 115 self.blockSize = instr.readUInt16() 116 117 if self.tcpSocket.bytesAvailable() < self.blockSize: 118 return 119 120 nextFortune = instr.readString() 121 122 try: 123 # Python v3. 124 nextFortune = str(nextFortune, encoding='ascii') 125 except TypeError: 126 # Python v2. 127 pass 128 129 if nextFortune == self.currentFortune: 130 QtCore.QTimer.singleShot(0, self.requestNewFortune) 131 return 132 133 self.currentFortune = nextFortune 134 self.statusLabel.setText(self.currentFortune) 135 self.getFortuneButton.setEnabled(True) 136 137 def displayError(self, socketError): 138 if socketError == QtNetwork.QAbstractSocket.RemoteHostClosedError: 139 pass 140 elif socketError == QtNetwork.QAbstractSocket.HostNotFoundError: 141 QtWidgets.QMessageBox.information(self, "Fortune Client", 142 "The host was not found. Please check the host name and " 143 "port settings.") 144 elif socketError == QtNetwork.QAbstractSocket.ConnectionRefusedError: 145 QtWidgets.QMessageBox.information(self, "Fortune Client", 146 "The connection was refused by the peer. Make sure the " 147 "fortune server is running, and check that the host name " 148 "and port settings are correct.") 149 else: 150 QtWidgets.QMessageBox.information(self, "Fortune Client", 151 "The following error occurred: %s." % self.tcpSocket.errorString()) 152 153 self.getFortuneButton.setEnabled(True) 154 155 def enableGetFortuneButton(self): 156 self.getFortuneButton.setEnabled(bool(self.hostLineEdit.text() and 157 self.portLineEdit.text())) 158 159 160if __name__ == '__main__': 161 162 import sys 163 164 app = QtWidgets.QApplication(sys.argv) 165 client = Client() 166 client.show() 167 sys.exit(client.exec_()) 168