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#############################################################################
##
## Copyright (C) 2010 velociraptor Genjix <aphidia@hotmail.com>
## 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."
##
## $QT_END_LICENSE$
##
#############################################################################
from PySide2.QtWidgets import *
from PySide2.QtCore import *
class PingEvent(QEvent):
def __init__(self):
super(PingEvent, self).__init__(QEvent.Type(QEvent.User+2))
class PongEvent(QEvent):
def __init__(self):
super(PongEvent, self).__init__(QEvent.Type(QEvent.User+3))
class Pinger(QState):
def __init__(self, parent):
super(Pinger, self).__init__(parent)
def onEntry(self, e):
self.p = PingEvent()
self.machine().postEvent(self.p)
print('ping?')
class PongTransition(QAbstractTransition):
def eventTest(self, e):
return e.type() == QEvent.User+3
def onTransition(self, e):
self.p = PingEvent()
machine.postDelayedEvent(self.p, 500)
print('ping?')
class PingTransition(QAbstractTransition):
def eventTest(self, e):
return e.type() == QEvent.User+2
def onTransition(self, e):
self.p = PongEvent()
machine.postDelayedEvent(self.p, 500)
print('pong!')
if __name__ == '__main__':
import sys
app = QCoreApplication(sys.argv)
machine = QStateMachine()
group = QState(QState.ParallelStates)
group.setObjectName('group')
pinger = Pinger(group)
pinger.setObjectName('pinger')
pinger.addTransition(PongTransition())
ponger = QState(group)
ponger.setObjectName('ponger')
ponger.addTransition(PingTransition())
machine.addState(group)
machine.setInitialState(group)
machine.start()
sys.exit(app.exec_())
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