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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2018 Riverbank Computing Limited
## Copyright (C) 2017 Ford Motor Company
##
## This file is part of the PyQt examples.
##
## $QT_BEGIN_LICENSE:BSD$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## BSD License Usage
## Alternatively, 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."
## $QT_END_LICENSE$
##
#############################################################################
import sys
from PyQt5.QtCore import pyqtSignal, pyqtSlot, QCoreApplication, QObject, QUrl
from PyQt5.QtRemoteObjects import QRemoteObjectNode
class DynamicClient(QObject):
# This signal is connected with server_slot() slot of the source object and
# echoes back the switch state received from the source.
echoSwitchState = pyqtSignal(bool)
def __init__(self, replica, parent=None):
super().__init__(parent)
self._replica = replica
self._clientSwitchState = False
replica.initialized.connect(self.initConnection)
@pyqtSlot(bool)
def recSwitchState(self, value):
self._clientSwitchState = self._replica.property('currState')
print("Received source state", value, self._clientSwitchState)
# Emit the signal to echo the received state back to the server.
self.echoSwitchState.emit(self._clientSwitchState)
@pyqtSlot()
def initConnection(self):
# Connect the replica source signal currStateChanged() with the
# client's recSwitchState() slot to receive the source's current state.
self._replica.currStateChanged.connect(self.recSwitchState)
# Connect the client's echoSwitchState() signal with replica's
# server_slot() to echo back the received state.
self.echoSwitchState.connect(self._replica.server_slot)
if __name__ == '__main__':
app = QCoreApplication(sys.argv)
# Create the remote object node.
repNode = QRemoteObjectNode(QUrl('local:registry'))
# Acquire a replica of the source from the host node.
replica = repNode.acquireDynamic('SimpleSwitch')
# Create the client switch object and pass the replica to it.
rswitch = DynamicClient(replica)
sys.exit(app.exec_())
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