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98 lines
3 KiB
C++
98 lines
3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtQml module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QQMLEXPRESSION_H
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#define QQMLEXPRESSION_H
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#include <QtQml/qqmlerror.h>
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#include <QtQml/qqmlscriptstring.h>
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#include <QtCore/qobject.h>
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#include <QtCore/qvariant.h>
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QT_BEGIN_NAMESPACE
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class QString;
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class QQmlRefCount;
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class QQmlEngine;
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class QQmlContext;
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class QQmlExpressionPrivate;
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class QQmlContextData;
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class Q_QML_EXPORT QQmlExpression : public QObject
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{
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Q_OBJECT
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public:
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QQmlExpression();
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QQmlExpression(QQmlContext *, QObject *, const QString &, QObject * = Q_NULLPTR);
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explicit QQmlExpression(const QQmlScriptString &, QQmlContext * = Q_NULLPTR, QObject * = Q_NULLPTR, QObject * = Q_NULLPTR);
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virtual ~QQmlExpression();
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QQmlEngine *engine() const;
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QQmlContext *context() const;
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QString expression() const;
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void setExpression(const QString &);
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bool notifyOnValueChanged() const;
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void setNotifyOnValueChanged(bool);
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QString sourceFile() const;
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int lineNumber() const;
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int columnNumber() const;
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void setSourceLocation(const QString &fileName, int line, int column = 0);
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QObject *scopeObject() const;
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bool hasError() const;
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void clearError();
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QQmlError error() const;
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QVariant evaluate(bool *valueIsUndefined = Q_NULLPTR);
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Q_SIGNALS:
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void valueChanged();
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private:
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QQmlExpression(QQmlContextData *, QObject *, const QString &);
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Q_DISABLE_COPY(QQmlExpression)
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Q_DECLARE_PRIVATE(QQmlExpression)
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friend class QQmlDebugger;
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friend class QQmlContext;
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};
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QT_END_NAMESPACE
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#endif // QQMLEXPRESSION_H
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