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/****************************************************************************
**
** Copyright (C) 2012 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSTATEMACHINE_P_H
#define QSTATEMACHINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qstate_p.h"
#include <QtCore/qcoreevent.h>
#include <QtCore/qhash.h>
#include <QtCore/qlist.h>
#include <QtCore/qmutex.h>
#include <QtCore/qpair.h>
#include <QtCore/qset.h>
#include <QtCore/qvector.h>
QT_BEGIN_NAMESPACE
class QEvent;
#ifndef QT_NO_STATEMACHINE_EVENTFILTER
class QEventTransition;
#endif
class QSignalEventGenerator;
class QSignalTransition;
class QAbstractState;
class QAbstractTransition;
class QFinalState;
class QHistoryState;
class QState;
#ifndef QT_NO_ANIMATION
class QAbstractAnimation;
#endif
class QStateMachine;
class Q_CORE_EXPORT QStateMachinePrivate : public QStatePrivate
{
Q_DECLARE_PUBLIC(QStateMachine)
public:
enum State {
NotRunning,
Starting,
Running
};
enum EventProcessingMode {
DirectProcessing,
QueuedProcessing
};
enum StopProcessingReason {
EventQueueEmpty,
Finished,
Stopped
};
QStateMachinePrivate();
~QStateMachinePrivate();
static QStateMachinePrivate *get(QStateMachine *q);
QState *findLCA(const QList<QAbstractState*> &states) const;
static bool stateEntryLessThan(QAbstractState *s1, QAbstractState *s2);
static bool stateExitLessThan(QAbstractState *s1, QAbstractState *s2);
QAbstractState *findErrorState(QAbstractState *context);
void setError(QStateMachine::Error error, QAbstractState *currentContext);
// private slots
void _q_start();
void _q_process();
#ifndef QT_NO_ANIMATION
void _q_animationFinished();
#endif
QState *rootState() const;
QState *startState();
void removeStartState();
void clearHistory();
void microstep(QEvent *event, const QList<QAbstractTransition*> &transitionList);
bool isPreempted(const QAbstractState *s, const QSet<QAbstractTransition*> &transitions) const;
QSet<QAbstractTransition*> selectTransitions(QEvent *event) const;
QList<QAbstractState*> exitStates(QEvent *event, const QList<QAbstractTransition*> &transitionList);
void executeTransitionContent(QEvent *event, const QList<QAbstractTransition*> &transitionList);
QList<QAbstractState*> enterStates(QEvent *event, const QList<QAbstractTransition*> &enabledTransitions);
void addStatesToEnter(QAbstractState *s, QState *root,
QSet<QAbstractState*> &statesToEnter,
QSet<QAbstractState*> &statesForDefaultEntry);
void applyProperties(const QList<QAbstractTransition*> &transitionList,
const QList<QAbstractState*> &exitedStates,
const QList<QAbstractState*> &enteredStates);
static QState *toStandardState(QAbstractState *state);
static const QState *toStandardState(const QAbstractState *state);
static QFinalState *toFinalState(QAbstractState *state);
static QHistoryState *toHistoryState(QAbstractState *state);
bool isInFinalState(QAbstractState *s) const;
static bool isFinal(const QAbstractState *s);
static bool isParallel(const QAbstractState *s);
bool isCompound(const QAbstractState *s) const;
bool isAtomic(const QAbstractState *s) const;
static bool isDescendantOf(const QAbstractState *s, const QAbstractState *other);
static QList<QState*> properAncestors(const QAbstractState *s, const QState *upperBound);
void goToState(QAbstractState *targetState);
void registerTransitions(QAbstractState *state);
void registerSignalTransition(QSignalTransition *transition);
void unregisterSignalTransition(QSignalTransition *transition);
#ifndef QT_NO_STATEMACHINE_EVENTFILTER
void registerEventTransition(QEventTransition *transition);
void unregisterEventTransition(QEventTransition *transition);
void handleFilteredEvent(QObject *watched, QEvent *event);
#endif
void unregisterTransition(QAbstractTransition *transition);
void unregisterAllTransitions();
void handleTransitionSignal(QObject *sender, int signalIndex,
void **args);
void postInternalEvent(QEvent *e);
void postExternalEvent(QEvent *e);
QEvent *dequeueInternalEvent();
QEvent *dequeueExternalEvent();
bool isInternalEventQueueEmpty();
bool isExternalEventQueueEmpty();
void processEvents(EventProcessingMode processingMode);
void cancelAllDelayedEvents();
#ifndef QT_NO_PROPERTIES
typedef QPair<QObject *, QByteArray> RestorableId;
QHash<RestorableId, QVariant> registeredRestorables;
void registerRestorable(QObject *object, const QByteArray &propertyName);
void unregisterRestorable(QObject *object, const QByteArray &propertyName);
bool hasRestorable(QObject *object, const QByteArray &propertyName) const;
QVariant restorableValue(QObject *object, const QByteArray &propertyName) const;
QList<QPropertyAssignment> restorablesToPropertyList(const QHash<RestorableId, QVariant> &restorables) const;
#endif
State state;
QState *_startState;
bool processing;
bool processingScheduled;
bool stop;
StopProcessingReason stopProcessingReason;
QSet<QAbstractState*> configuration;
QList<QEvent*> internalEventQueue;
QList<QEvent*> externalEventQueue;
QMutex internalEventMutex;
QMutex externalEventMutex;
QStateMachine::Error error;
QStateMachine::RestorePolicy globalRestorePolicy;
QString errorString;
QSet<QAbstractState *> pendingErrorStates;
QSet<QAbstractState *> pendingErrorStatesForDefaultEntry;
#ifndef QT_NO_ANIMATION
bool animated;
QPair<QList<QAbstractAnimation*>, QList<QAbstractAnimation*> >
initializeAnimation(QAbstractAnimation *abstractAnimation,
const QPropertyAssignment &prop);
QHash<QAbstractState*, QList<QAbstractAnimation*> > animationsForState;
QHash<QAbstractAnimation*, QPropertyAssignment> propertyForAnimation;
QHash<QAbstractAnimation*, QAbstractState*> stateForAnimation;
QSet<QAbstractAnimation*> resetAnimationEndValues;
QList<QAbstractAnimation *> defaultAnimations;
QMultiHash<QAbstractState *, QAbstractAnimation *> defaultAnimationsForSource;
QMultiHash<QAbstractState *, QAbstractAnimation *> defaultAnimationsForTarget;
#endif // QT_NO_ANIMATION
QSignalEventGenerator *signalEventGenerator;
QHash<const QObject*, QVector<int> > connections;
#ifndef QT_NO_STATEMACHINE_EVENTFILTER
QHash<QObject*, QHash<QEvent::Type, int> > qobjectEvents;
#endif
QHash<int, QEvent*> delayedEvents;
QMutex delayedEventsMutex;
typedef QEvent* (*f_cloneEvent)(QEvent*);
struct Handler {
f_cloneEvent cloneEvent;
};
static const Handler *handler;
};
Q_CORE_EXPORT const QStateMachinePrivate::Handler *qcoreStateMachineHandler();
QT_END_NAMESPACE
#endif
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