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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 <qdeclarativeproperty.h>
#include <QtCore/qobject.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Declarative)
class QDeclarativeActionEvent;
class QDeclarativeAbstractBinding;
class QDeclarativeBinding;
class QDeclarativeExpression;
class Q_DECLARATIVE_EXPORT QDeclarativeAction
{
public:
QDeclarativeAction();
QDeclarativeAction(QObject *, const QString &, const QVariant &);
QDeclarativeAction(QObject *, const QString &,
QDeclarativeContext *, const QVariant &);
bool restore:1;
bool actionDone:1;
bool reverseEvent:1;
bool deletableToBinding:1;
QDeclarativeProperty 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;
enum Reason { ActualChange, FastForward };
virtual void execute(Reason reason = ActualChange);
virtual bool isReversable();
virtual void reverse(Reason reason = ActualChange);
virtual void saveOriginals() {}
virtual void copyOriginals(QDeclarativeActionEvent *) {}
virtual bool isRewindable() { return isReversable(); }
virtual void rewind() {}
virtual void saveCurrentValues() {}
virtual void saveTargetValues() {}
virtual bool changesBindings();
virtual void clearBindings();
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
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