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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** 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
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#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 * = nullptr);
explicit QQmlExpression(const QQmlScriptString &, QQmlContext * = nullptr, QObject * = nullptr, QObject * = nullptr);
~QQmlExpression() override;
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 = nullptr);
Q_SIGNALS:
void valueChanged();
private:
QQmlExpression(QQmlContextData *, QObject *, const QString &);
Q_DISABLE_COPY(QQmlExpression)
Q_DECLARE_PRIVATE(QQmlExpression)
friend class QQmlDebugger;
friend class QQmlContext;
};
QT_END_NAMESPACE
#endif // QQMLEXPRESSION_H
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