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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** use the contact form at http://qt.digia.com/contact-us.
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** 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
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** General Public License version 3.0 as published by the Free Software
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****************************************************************************/
#ifndef QQMLEXPRESSION_H
#define QQMLEXPRESSION_H
#include <QtQml/qqmlerror.h>
#include <QtQml/qqmlscriptstring.h>
#include <QtCore/qobject.h>
#include <QtCore/qvariant.h>
QT_BEGIN_NAMESPACE
class QString;
class QQmlRefCount;
class QQmlEngine;
class QQmlContext;
class QQmlExpressionPrivate;
class QQmlContextData;
class Q_QML_EXPORT QQmlExpression : public QObject
{
Q_OBJECT
public:
QQmlExpression();
QQmlExpression(QQmlContext *, QObject *, const QString &, QObject * = 0);
explicit QQmlExpression(const QQmlScriptString &, QQmlContext * = 0, QObject * = 0, QObject * = 0);
virtual ~QQmlExpression();
QQmlEngine *engine() const;
QQmlContext *context() const;
QString expression() const;
void setExpression(const QString &);
bool notifyOnValueChanged() const;
void setNotifyOnValueChanged(bool);
QString sourceFile() const;
int lineNumber() const;
int columnNumber() const;
void setSourceLocation(const QString &fileName, int line, int column = 0);
QObject *scopeObject() const;
bool hasError() const;
void clearError();
QQmlError error() const;
QVariant evaluate(bool *valueIsUndefined = 0);
Q_SIGNALS:
void valueChanged();
private:
QQmlExpression(QQmlContextData *, QObject *, const QString &);
Q_DISABLE_COPY(QQmlExpression)
Q_DECLARE_PRIVATE(QQmlExpression)
friend class QQmlDebugger;
friend class QQmlContext;
friend class QQmlVME;
};
QT_END_NAMESPACE
#endif // QQMLEXPRESSION_H
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