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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVESTATE_H
+#define QDECLARATIVESTATE_H
+
+#include <qdeclarative.h>
+
+#include <QtCore/qobject.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Declarative)
+
+class QDeclarativeActionEvent;
+class QDeclarativeBinding;
+class Q_DECLARATIVE_EXPORT QDeclarativeAction
+{
+public:
+    QDeclarativeAction();
+    QDeclarativeAction(QObject *, const QString &, const QVariant &);
+
+    bool restore:1;
+    bool actionDone:1;
+    bool reverseEvent:1;
+    bool deletableToBinding:1;
+
+    QDeclarativeMetaProperty property;
+    QVariant fromValue;
+    QVariant toValue;
+
+    QDeclarativeAbstractBinding *fromBinding;
+    QDeclarativeAbstractBinding *toBinding;
+    QDeclarativeActionEvent *event;
+
+    //strictly for matching
+    QObject *specifiedObject;
+    QString specifiedProperty;
+
+    void deleteFromBinding();
+};
+
+class QDeclarativeActionEvent
+{
+public:
+    virtual ~QDeclarativeActionEvent();
+    virtual QString typeName() const;
+
+    virtual void execute();
+    virtual bool isReversable();
+    virtual void reverse();
+    virtual void saveOriginals() {}
+
+    virtual bool isRewindable() { return isReversable(); }
+    virtual void rewind() {}
+    virtual void saveCurrentValues() {}
+
+    //virtual bool hasExtraActions();
+    virtual QList<QDeclarativeAction> extraActions();
+
+    virtual bool changesBindings();
+    virtual void clearForwardBindings();
+    virtual void clearReverseBindings();
+    virtual bool override(QDeclarativeActionEvent*other);
+};
+
+//### rename to QDeclarativeStateChange?
+class QDeclarativeStateGroup;
+class Q_DECLARATIVE_EXPORT QDeclarativeStateOperation : public QObject
+{
+    Q_OBJECT
+public:
+    QDeclarativeStateOperation(QObject *parent = 0)
+        : QObject(parent) {}
+    typedef QList<QDeclarativeAction> ActionList;
+
+    virtual ActionList actions();
+
+protected:
+    QDeclarativeStateOperation(QObjectPrivate &dd, QObject *parent = 0);
+};
+
+typedef QDeclarativeStateOperation::ActionList QDeclarativeStateActions;
+
+class QDeclarativeTransition;
+class QDeclarativeStatePrivate;
+class Q_DECLARATIVE_EXPORT QDeclarativeState : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QString name READ name WRITE setName)
+    Q_PROPERTY(QDeclarativeBinding *when READ when WRITE setWhen)
+    Q_PROPERTY(QString extend READ extends WRITE setExtends)
+    Q_PROPERTY(QDeclarativeListProperty<QDeclarativeStateOperation> changes READ changes)
+    Q_CLASSINFO("DefaultProperty", "changes")
+    Q_CLASSINFO("DeferredPropertyNames", "changes")
+
+public:
+    QDeclarativeState(QObject *parent=0);
+    virtual ~QDeclarativeState();
+
+    QString name() const;
+    void setName(const QString &);
+
+    /*'when' is a QDeclarativeBinding to limit state changes oscillation
+     due to the unpredictable order of evaluation of bound expressions*/
+    bool isWhenKnown() const;
+    QDeclarativeBinding *when() const;
+    void setWhen(QDeclarativeBinding *);
+
+    QString extends() const;
+    void setExtends(const QString &);
+
+    QDeclarativeListProperty<QDeclarativeStateOperation> changes();
+    int operationCount() const;
+    QDeclarativeStateOperation *operationAt(int) const;
+
+    QDeclarativeState &operator<<(QDeclarativeStateOperation *);
+
+    void apply(QDeclarativeStateGroup *, QDeclarativeTransition *, QDeclarativeState *revert);
+    void cancel();
+
+    QDeclarativeStateGroup *stateGroup() const;
+    void setStateGroup(QDeclarativeStateGroup *);
+
+Q_SIGNALS:
+    void completed();
+
+private:
+    Q_DECLARE_PRIVATE(QDeclarativeState)
+    Q_DISABLE_COPY(QDeclarativeState)
+};
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QDeclarativeStateOperation)
+QML_DECLARE_TYPE(QDeclarativeState)
+
+QT_END_HEADER
+
+#endif // QDECLARATIVESTATE_H