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156 lines
5.5 KiB
Python
156 lines
5.5 KiB
Python
#!/usr/bin/env python
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#############################################################################
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##
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## Copyright (C) 2013 Riverbank Computing Limited
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## Copyright (C) 2010 Hans-Peter Jansen <hpj@urpla.net>.
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## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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## All rights reserved.
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##
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## This file is part of the examples of PyQt.
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##
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## $QT_BEGIN_LICENSE:LGPL$
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## Commercial Usage
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## Licensees holding valid Qt Commercial licenses may use this file in
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## accordance with the Qt Commercial License Agreement provided with the
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## Software or, alternatively, in accordance with the terms contained in
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## a written agreement between you and Nokia.
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##
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## GNU Lesser General Public License Usage
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## Alternatively, this file may be used under the terms of the GNU Lesser
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## General Public License version 2.1 as published by the Free Software
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## Foundation and appearing in the file LICENSE.LGPL included in the
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## packaging of this file. Please review the following information to
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## ensure the GNU Lesser General Public License version 2.1 requirements
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## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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##
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## In addition, as a special exception, Nokia gives you certain additional
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## rights. These rights are described in the Nokia Qt LGPL Exception
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## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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##
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## GNU General Public License Usage
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## Alternatively, this file may be used under the terms of the GNU
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## General Public License version 3.0 as published by the Free Software
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## Foundation and appearing in the file LICENSE.GPL included in the
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## packaging of this file. Please review the following information to
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## ensure the GNU General Public License version 3.0 requirements will be
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## met: http://www.gnu.org/copyleft/gpl.html.
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##
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## If you have questions regarding the use of this file, please contact
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## Nokia at qt-info@nokia.com.
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## $QT_END_LICENSE$
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##
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#############################################################################
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from PyQt5.QtCore import QDataStream, QTimer
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from PyQt5.QtWidgets import (QApplication, QDialog, QDialogButtonBox,
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QGridLayout, QLabel, QLineEdit, QMessageBox, QPushButton)
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from PyQt5.QtNetwork import QLocalSocket
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class Client(QDialog):
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def __init__(self, parent=None):
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super(Client, self).__init__(parent)
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self.blockSize = 0
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self.currentFortune = None
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hostLabel = QLabel("&Server name:")
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self.hostLineEdit = QLineEdit("fortune")
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hostLabel.setBuddy(self.hostLineEdit)
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self.statusLabel = QLabel(
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"This examples requires that you run the Fortune Server "
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"example as well.")
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self.statusLabel.setWordWrap(True)
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self.getFortuneButton = QPushButton("Get Fortune")
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self.getFortuneButton.setDefault(True)
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quitButton = QPushButton("Quit")
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buttonBox = QDialogButtonBox()
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buttonBox.addButton(self.getFortuneButton, QDialogButtonBox.ActionRole)
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buttonBox.addButton(quitButton, QDialogButtonBox.RejectRole)
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self.socket = QLocalSocket()
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self.hostLineEdit.textChanged.connect(self.enableGetFortuneButton)
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self.getFortuneButton.clicked.connect(self.requestNewFortune)
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quitButton.clicked.connect(self.close)
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self.socket.readyRead.connect(self.readFortune)
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self.socket.error.connect(self.displayError)
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mainLayout = QGridLayout()
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mainLayout.addWidget(hostLabel, 0, 0)
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mainLayout.addWidget(self.hostLineEdit, 0, 1)
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mainLayout.addWidget(self.statusLabel, 2, 0, 1, 2)
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mainLayout.addWidget(buttonBox, 3, 0, 1, 2)
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self.setLayout(mainLayout)
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self.setWindowTitle("Fortune Client")
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self.hostLineEdit.setFocus()
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def requestNewFortune(self):
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self.getFortuneButton.setEnabled(False)
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self.blockSize = 0
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self.socket.abort()
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self.socket.connectToServer(self.hostLineEdit.text())
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def readFortune(self):
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ins = QDataStream(self.socket)
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ins.setVersion(QDataStream.Qt_4_0)
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if self.blockSize == 0:
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if self.socket.bytesAvailable() < 2:
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return
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self.blockSize = ins.readUInt16()
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if ins.atEnd():
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return
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nextFortune = ins.readQString()
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if nextFortune == self.currentFortune:
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QTimer.singleShot(0, self.requestNewFortune)
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return
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self.currentFortune = nextFortune
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self.statusLabel.setText(self.currentFortune)
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self.getFortuneButton.setEnabled(True)
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def displayError(self, socketError):
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errors = {
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QLocalSocket.ServerNotFoundError:
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"The host was not found. Please check the host name and port "
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"settings.",
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QLocalSocket.ConnectionRefusedError:
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"The connection was refused by the peer. Make sure the "
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"fortune server is running, and check that the host name and "
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"port settings are correct.",
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QLocalSocket.PeerClosedError:
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None,
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}
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msg = errors.get(socketError,
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"The following error occurred: %s." % self.socket.errorString())
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if msg is not None:
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QMessageBox.information(self, "Fortune Client", msg)
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self.getFortuneButton.setEnabled(True)
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def enableGetFortuneButton(self):
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self.getFortuneButton.setEnabled(self.hostLineEdit.text() != "")
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if __name__ == '__main__':
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import sys
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app = QApplication(sys.argv)
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client = Client()
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client.show()
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sys.exit(app.exec_())
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