diff options
Diffstat (limited to 'examples/network/fortuneclient/fortuneclient.py')
| -rw-r--r-- | examples/network/fortuneclient/fortuneclient.py | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/examples/network/fortuneclient/fortuneclient.py b/examples/network/fortuneclient/fortuneclient.py new file mode 100644 index 000000000..99ca41b0e --- /dev/null +++ b/examples/network/fortuneclient/fortuneclient.py @@ -0,0 +1,161 @@ + +############################################################################# +## +## Copyright (C) 2013 Riverbank Computing Limited. +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: http://www.qt.io/licensing/ +## +## This file is part of the Qt for Python examples of the Qt Toolkit. +## +## $QT_BEGIN_LICENSE:BSD$ +## You may use this file under the terms of the BSD license as follows: +## +## "Redistribution and use in source and binary forms, with or without +## modification, are permitted provided that the following conditions are +## met: +## * Redistributions of source code must retain the above copyright +## notice, this list of conditions and the following disclaimer. +## * Redistributions in binary form must reproduce the above copyright +## notice, this list of conditions and the following disclaimer in +## the documentation and/or other materials provided with the +## distribution. +## * Neither the name of The Qt Company Ltd nor the names of its +## contributors may be used to endorse or promote products derived +## from this software without specific prior written permission. +## +## +## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +## +## $QT_END_LICENSE$ +## +############################################################################# + +"""PySide6 port of the network/fortuneclient example from Qt v5.x""" + +from PySide6 import QtCore, QtGui, QtWidgets, QtNetwork + + +class Client(QtWidgets.QDialog): + def __init__(self, parent=None): + super(Client, self).__init__(parent) + + self.blockSize = 0 + self.currentFortune = '' + + hostLabel = QtWidgets.QLabel("&Server name:") + portLabel = QtWidgets.QLabel("S&erver port:") + + self.hostLineEdit = QtWidgets.QLineEdit('Localhost') + self.portLineEdit = QtWidgets.QLineEdit() + self.portLineEdit.setValidator(QtGui.QIntValidator(1, 65535, self)) + + hostLabel.setBuddy(self.hostLineEdit) + portLabel.setBuddy(self.portLineEdit) + + self.statusLabel = QtWidgets.QLabel("This examples requires that you run " + "the Fortune Server example as well.") + + self.getFortuneButton = QtWidgets.QPushButton("Get Fortune") + self.getFortuneButton.setDefault(True) + self.getFortuneButton.setEnabled(False) + + quitButton = QtWidgets.QPushButton("Quit") + + buttonBox = QtWidgets.QDialogButtonBox() + buttonBox.addButton(self.getFortuneButton, + QtWidgets.QDialogButtonBox.ActionRole) + buttonBox.addButton(quitButton, QtWidgets.QDialogButtonBox.RejectRole) + + self.tcpSocket = QtNetwork.QTcpSocket(self) + + self.hostLineEdit.textChanged.connect(self.enableGetFortuneButton) + self.portLineEdit.textChanged.connect(self.enableGetFortuneButton) + self.getFortuneButton.clicked.connect(self.requestNewFortune) + quitButton.clicked.connect(self.close) + self.tcpSocket.readyRead.connect(self.readFortune) + self.tcpSocket.errorOccurred.connect(self.displayError) + + mainLayout = QtWidgets.QGridLayout() + mainLayout.addWidget(hostLabel, 0, 0) + mainLayout.addWidget(self.hostLineEdit, 0, 1) + mainLayout.addWidget(portLabel, 1, 0) + mainLayout.addWidget(self.portLineEdit, 1, 1) + mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2) + mainLayout.addWidget(buttonBox, 3, 0, 1, 2) + self.setLayout(mainLayout) + + self.setWindowTitle("Fortune Client") + self.portLineEdit.setFocus() + + def requestNewFortune(self): + self.getFortuneButton.setEnabled(False) + self.blockSize = 0 + self.tcpSocket.abort() + self.tcpSocket.connectToHost(self.hostLineEdit.text(), + int(self.portLineEdit.text())) + + def readFortune(self): + instr = QtCore.QDataStream(self.tcpSocket) + instr.setVersion(QtCore.QDataStream.Qt_4_0) + + if self.blockSize == 0: + if self.tcpSocket.bytesAvailable() < 2: + return + + self.blockSize = instr.readUInt16() + + if self.tcpSocket.bytesAvailable() < self.blockSize: + return + + nextFortune = instr.readString() + nextFortune = str(nextFortune, encoding='ascii') + + if nextFortune == self.currentFortune: + QtCore.QTimer.singleShot(0, self.requestNewFortune) + return + + self.currentFortune = nextFortune + self.statusLabel.setText(self.currentFortune) + self.getFortuneButton.setEnabled(True) + + def displayError(self, socketError): + if socketError == QtNetwork.QAbstractSocket.RemoteHostClosedError: + pass + elif socketError == QtNetwork.QAbstractSocket.HostNotFoundError: + QtWidgets.QMessageBox.information(self, "Fortune Client", + "The host was not found. Please check the host name and " + "port settings.") + elif socketError == QtNetwork.QAbstractSocket.ConnectionRefusedError: + QtWidgets.QMessageBox.information(self, "Fortune Client", + "The connection was refused by the peer. Make sure the " + "fortune server is running, and check that the host name " + "and port settings are correct.") + else: + QtWidgets.QMessageBox.information(self, "Fortune Client", + "The following error occurred: %s." % self.tcpSocket.errorString()) + + self.getFortuneButton.setEnabled(True) + + def enableGetFortuneButton(self): + self.getFortuneButton.setEnabled(bool(self.hostLineEdit.text() and + self.portLineEdit.text())) + + +if __name__ == '__main__': + + import sys + + app = QtWidgets.QApplication(sys.argv) + client = Client() + client.show() + sys.exit(client.exec_()) |