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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 QMLEXPRESSION_H
#define QMLEXPRESSION_H
#include "qmlerror.h"
#include <QtCore/qobject.h>
#include <QtCore/qvariant.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Declarative)
class QString;
class QmlRefCount;
class QmlEngine;
class QmlContext;
class QmlExpressionPrivate;
class Q_DECLARATIVE_EXPORT QmlExpression : public QObject
{
Q_OBJECT
public:
QmlExpression();
QmlExpression(QmlContext *, const QString &, QObject *);
virtual ~QmlExpression();
QmlEngine *engine() const;
QmlContext *context() const;
QString expression() const;
void clearExpression();
virtual void setExpression(const QString &);
bool isConstant() const;
bool trackChange() const;
void setTrackChange(bool);
QString sourceFile() const;
int lineNumber() const;
void setSourceLocation(const QString &fileName, int line);
QObject *scopeObject() const;
bool hasError() const;
void clearError();
QmlError error() const;
public Q_SLOTS:
QVariant value(bool *isUndefined = 0);
Q_SIGNALS:
void valueChanged();
protected:
virtual void emitValueChanged();
QmlExpression(QmlContext *, const QString &, QObject *,
QmlExpressionPrivate &dd);
QmlExpression(QmlContext *, void *, QmlRefCount *rc, QObject *me, const QString &,
int, QmlExpressionPrivate &dd);
private Q_SLOTS:
void __q_notify();
private:
Q_DECLARE_PRIVATE(QmlExpression)
friend class QmlDebugger;
friend class QmlContext;
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QMLEXPRESSION_H
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