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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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()->postEvent(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()->postEvent(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]
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