108 lines
4.2 KiB
Python
108 lines
4.2 KiB
Python
#!/usr/bin/env python
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#############################################################################
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##
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## Copyright (C) 2018 Riverbank Computing Limited
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## Copyright (C) 2017 Ford Motor Company
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##
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## This file is part of the PyQt examples.
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##
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## $QT_BEGIN_LICENSE:BSD$
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## Commercial License Usage
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## Licensees holding valid commercial Qt licenses may use this file in
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## accordance with the 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 The Qt Company. For licensing terms
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## and conditions see https://www.qt.io/terms-conditions. For further
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## information use the contact form at https://www.qt.io/contact-us.
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##
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## BSD License Usage
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## Alternatively, you may use this file under the terms of the BSD license
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## as follows:
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##
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## "Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following conditions are
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## met:
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## * Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## * Redistributions in binary form must reproduce the above copyright
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## notice, this list of conditions and the following disclaimer in
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## the documentation and/or other materials provided with the
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## distribution.
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## * Neither the name of The Qt Company Ltd nor the names of its
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## contributors may be used to endorse or promote products derived
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## from this software without specific prior written permission.
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##
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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## $QT_END_LICENSE$
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##
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#############################################################################
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import sys
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from PyQt5.QtCore import pyqtSignal, pyqtSlot, QCoreApplication, QObject, QUrl
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from PyQt5.QtRemoteObjects import QRemoteObjectNode
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class DynamicClient(QObject):
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# This signal is connected with server_slot() slot of the source object and
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# echoes back the switch state received from the source.
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echoSwitchState = pyqtSignal(bool)
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def __init__(self, replica, parent=None):
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super().__init__(parent)
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self._replica = replica
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self._clientSwitchState = False
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replica.initialized.connect(self.initConnection)
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@pyqtSlot(bool)
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def recSwitchState(self, value):
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self._clientSwitchState = self._replica.property('currState')
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print("Received source state", value, self._clientSwitchState)
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# Emit the signal to echo the received state back to the server.
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self.echoSwitchState.emit(self._clientSwitchState)
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@pyqtSlot()
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def initConnection(self):
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# Connect the replica source signal currStateChanged() with the
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# client's recSwitchState() slot to receive the source's current state.
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self._replica.currStateChanged.connect(self.recSwitchState)
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# Connect the client's echoSwitchState() signal with replica's
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# server_slot() to echo back the received state.
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self.echoSwitchState.connect(self._replica.server_slot)
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if __name__ == '__main__':
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app = QCoreApplication(sys.argv)
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# Create the remote object node.
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repNode = QRemoteObjectNode()
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# Connect with the remote host node.
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repNode.connectToNode(QUrl('local:replica'))
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# Acquire a replica of the source from the host node.
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replica = repNode.acquireDynamic('SimpleSwitch')
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# Create the client switch object and pass the replica to it.
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rswitch = DynamicClient(replica)
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sys.exit(app.exec_())
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