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# Copyright (C) 2010 velociraptor Genjix <aphidia@hotmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import sys
from PySide6.QtCore import QCoreApplication, QEvent
from PySide6.QtStateMachine import QAbstractTransition, QState, QStateMachine
class PingEvent(QEvent):
def __init__(self):
super().__init__(QEvent.Type(QEvent.User + 2))
class PongEvent(QEvent):
def __init__(self):
super().__init__(QEvent.Type(QEvent.User + 3))
class Pinger(QState):
def __init__(self, parent):
super().__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__':
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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