/****************************************************************************
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** Copyright (C) 2015 The Qt Company Ltd.
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** $QT_BEGIN_LICENSE:LGPL21$
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****************************************************************************/

#ifndef QABSTRACTSTATE_H
#define QABSTRACTSTATE_H

#include <QtCore/qobject.h>

QT_BEGIN_NAMESPACE


#ifndef QT_NO_STATEMACHINE

class QState;
class QStateMachine;

class QAbstractStatePrivate;
class Q_CORE_EXPORT QAbstractState : public QObject
{
    Q_OBJECT
    Q_PROPERTY(bool active READ active NOTIFY activeChanged)
public:
    ~QAbstractState();

    QState *parentState() const;
    QStateMachine *machine() const;

    bool active() const;

Q_SIGNALS:
    void entered(QPrivateSignal);
    void exited(QPrivateSignal);
    void activeChanged(bool active);

protected:
    QAbstractState(QState *parent = Q_NULLPTR);

    virtual void onEntry(QEvent *event) = 0;
    virtual void onExit(QEvent *event) = 0;

    bool event(QEvent *e) Q_DECL_OVERRIDE;

protected:
    QAbstractState(QAbstractStatePrivate &dd, QState *parent);

private:
    Q_DISABLE_COPY(QAbstractState)
    Q_DECLARE_PRIVATE(QAbstractState)
};

#endif //QT_NO_STATEMACHINE

QT_END_NAMESPACE

#endif
