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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtCore module 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 Nokia Corporation and its Subsidiary(-ies) 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore>
+#include <stdio.h>
+
+//! [0]
+class PingEvent : public QEvent
+{
+public:
+ PingEvent() : QEvent(QEvent::Type(QEvent::User+2))
+ {}
+};
+
+class PongEvent : public QEvent
+{
+public:
+ PongEvent() : QEvent(QEvent::Type(QEvent::User+3))
+ {}
+};
+//! [0]
+
+//! [1]
+class Pinger : public QState
+{
+public:
+ Pinger(QState *parent)
+ : QState(parent) {}
+
+protected:
+ virtual void onEntry(QEvent *)
+ {
+ machine()->postEvent(new PingEvent());
+ fprintf(stdout, "ping?\n");
+ }
+};
+//! [1]
+
+//! [3]
+class PongTransition : public QAbstractTransition
+{
+public:
+ PongTransition() {}
+
+protected:
+ virtual bool eventTest(QEvent *e) {
+ return (e->type() == QEvent::User+3);
+ }
+ virtual void onTransition(QEvent *)
+ {
+ machine()->postDelayedEvent(new PingEvent(), 500);
+ fprintf(stdout, "ping?\n");
+ }
+};
+//! [3]
+
+//! [2]
+class PingTransition : public QAbstractTransition
+{
+public:
+ PingTransition() {}
+
+protected:
+ virtual bool eventTest(QEvent *e) {
+ return (e->type() == QEvent::User+2);
+ }
+ virtual void onTransition(QEvent *)
+ {
+ machine()->postDelayedEvent(new PongEvent(), 500);
+ fprintf(stdout, "pong!\n");
+ }
+};
+//! [2]
+
+//! [4]
+int main(int argc, char **argv)
+{
+ QCoreApplication app(argc, argv);
+
+ QStateMachine machine;
+ QState *group = new QState(QState::ParallelStates);
+ group->setObjectName("group");
+//! [4]
+
+//! [5]
+ Pinger *pinger = new Pinger(group);
+ pinger->setObjectName("pinger");
+ pinger->addTransition(new PongTransition());
+
+ QState *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]