Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QtCore/QCoreApplication>
++ #include <QtCore/QDebug>
++ #include <QtCore/QEvent>
++ #include <QtStateMachine/QAbstractTransition>
++ #include <QtStateMachine/QState>
++ #include <QtStateMachine/QStateMachine>
++
++ static constexpr QEvent::Type PingEventType = QEvent::Type(QEvent::User + 2);
++ static constexpr QEvent::Type PongEventType = QEvent::Type(QEvent::User + 3);
++
++ //! [0]
++ class PingEvent : public QEvent
++ {
++ public:
++ PingEvent() : QEvent(PingEventType) { }
++ };
++
++ class PongEvent : public QEvent
++ {
++ public:
++ PongEvent() : QEvent(PongEventType) { }
++ };
++ //! [0]
++
++ //! [1]
++ class Pinger : public QState
++ {
++ public:
++ explicit Pinger(QState *parent) : QState(parent) { }
++
++ protected:
++ void onEntry(QEvent *) override
++ {
++ machine()->postEvent(new PingEvent);
++ qInfo() << "ping?";
++ }
++ };
++ //! [1]
++
++ //! [3]
++ class PongTransition : public QAbstractTransition
++ {
++ public:
++ PongTransition() {}
++
++ protected:
++ bool eventTest(QEvent *e) override { return (e->type() == PingEventType); }
++
++ void onTransition(QEvent *) override
++ {
++ machine()->postDelayedEvent(new PingEvent, 500);
++ qInfo() << "ping?";
++ }
++ };
++ //! [3]
++
++ //! [2]
++ class PingTransition : public QAbstractTransition
++ {
++ public:
++ PingTransition() {}
++
++ protected:
++ bool eventTest(QEvent *e) override { return e->type() == PingEventType; }
++
++ void onTransition(QEvent *) override
++ {
++ machine()->postDelayedEvent(new PongEvent, 500);
++ qInfo() << "pong!";
++ }
++ };
++ //! [2]
++
++ //! [4]
++ int main(int argc, char **argv)
++ {
++ QCoreApplication app(argc, argv);
++
++ QStateMachine machine;
++ auto group = new QState(QState::ParallelStates);
++ group->setObjectName("group");
++ //! [4]
++
++ //! [5]
++ auto pinger = new Pinger(group);
++ pinger->setObjectName("pinger");
++ pinger->addTransition(new PongTransition);
++
++ auto ponger = new QState(group);
++ ponger->setObjectName("ponger");
++ ponger->addTransition(new PingTransition);
++ //! [5]
++
++ //! [6]
++ machine.addState(group);
++ machine.setInitialState(group);
++ machine.start();
++
++ return app.exec();
++ }
++ //! [6]