Qt Toolkit - qvariant.h include file

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# qvariant.h

This is the verbatim text of the qvariant.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/src/kernel/qvariant.h   2.3.7   edited 2002-10-28 $
    **
    ** Definition of QVariant class
    **
    ** Created : 990414
    **
    ** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the kernel module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
    ** Agreement provided with the Software.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    **********************************************************************/

    #ifndef QVARIANT_H
    #define QVARIANT_H

    #ifndef QT_H
    #include "qstring.h"
    #endif // QT_H

    #ifndef QT_NO_VARIANT

    class QString;
    class QCString;
    class QFont;
    class QPixmap;
    class QBrush;
    class QRect;
    class QPoint;
    class QImage;
    class QSize;
    class QColor;
    class QPalette;
    class QColorGroup;
    class QIconSet;
    class QDataStream;
    class QPointArray;
    class QRegion;
    class QBitmap;
    class QCursor;
    class QStringList;
    class QSizePolicy;
    // Relevant header files rejected after QVariant declaration
    // for GCC 2.7.* compatibility
    class QVariant;
    class QVariantPrivate;
    template <class T> class QValueList;
    template <class T> class QValueListConstIterator;
    template <class T> class QValueListNode;
    template <class Key, class T> class QMap;
    template <class Key, class T> class QMapConstIterator;

    class Q_EXPORT QVariant
    {
    public:
        enum Type {
            Invalid,
            Map,
            List,
            String,
            StringList,
            Font,
            Pixmap,
            Brush,
            Rect,
            Size,
            Color,
            Palette,
            ColorGroup,
            IconSet,
            Point,
            Image,
            Int,
            UInt,
            Bool,
            Double,
            CString,
            PointArray,
            Region,
            Bitmap,
            Cursor,
            SizePolicy
        };

        QVariant();
        ~QVariant();
        QVariant( const QVariant& );
        QVariant( QDataStream& s );

        QVariant( const QString& );
        QVariant( const QCString& );
        QVariant( const char* );
        QVariant( const QStringList& );
        QVariant( const QFont& );
        QVariant( const QPixmap& );
        QVariant( const QImage& );
        QVariant( const QBrush& );
        QVariant( const QPoint& );
        QVariant( const QRect& );
        QVariant( const QSize& );
        QVariant( const QColor& );
        QVariant( const QPalette& );
        QVariant( const QColorGroup& );
    #ifndef QT_NO_ICONSET
        QVariant( const QIconSet& );
    #endif
        QVariant( const QPointArray& );
        QVariant( const QRegion& );
        QVariant( const QBitmap& );
        QVariant( const QCursor& );
        QVariant( const QValueList<QVariant>& );
        QVariant( const QMap<QString,QVariant>& );
        QVariant( int );
        QVariant( uint );
        // ### Problems on some compilers ?
        QVariant( bool, int );
        QVariant( double );
        QVariant( QSizePolicy );

        QVariant& operator= ( const QVariant& );
        bool operator==( const QVariant& ) const;
        bool operator!=( const QVariant& ) const;

        Type type() const;
        const char* typeName() const;

        bool canCast( Type ) const;

        bool isValid() const;

        void clear();

        const QString toString() const;
        const QCString toCString() const;
        const QStringList toStringList() const;
        const QFont toFont() const;
        const QPixmap toPixmap() const;
        const QImage toImage() const;
        const QBrush toBrush() const;
        const QPoint toPoint() const;
        const QRect toRect() const;
        const QSize toSize() const;
        const QColor toColor() const;
        const QPalette toPalette() const;
        const QColorGroup toColorGroup() const;
    #ifndef QT_NO_ICONSET
        const QIconSet toIconSet() const;
    #endif
        const QPointArray toPointArray() const;
        const QBitmap toBitmap() const;
        const QRegion toRegion() const;
        const QCursor toCursor() const;
        int toInt() const;
        uint toUInt() const;
        bool toBool() const;
        double toDouble() const;
        const QValueList<QVariant> toList() const;
        const QMap<QString,QVariant> toMap() const;
        QSizePolicy toSizePolicy() const;

        QValueListConstIterator<QVariant> listBegin() const;
        QValueListConstIterator<QVariant> listEnd() const;
        QValueListConstIterator<QString> stringListBegin() const;
        QValueListConstIterator<QString> stringListEnd() const;
        QMapConstIterator<QString,QVariant> mapBegin() const;
        QMapConstIterator<QString,QVariant> mapEnd() const;
        QMapConstIterator<QString,QVariant> mapFind( const QString& ) const;

        QString& asString();
        QCString& asCString();
        QStringList& asStringList();
        QFont& asFont();
        QPixmap& asPixmap();
        QImage& asImage();
        QBrush& asBrush();
        QPoint& asPoint();
        QRect& asRect();
        QSize& asSize();
        QColor& asColor();
        QPalette& asPalette();
        QColorGroup& asColorGroup();
    #ifndef QT_NO_ICONSET
        QIconSet& asIconSet();
    #endif
        QPointArray& asPointArray();
        QBitmap& asBitmap();
        QRegion& asRegion();
        QCursor& asCursor();
        int& asInt();
        uint& asUInt();
        bool& asBool();
        double& asDouble();
        QValueList<QVariant>& asList();
        QMap<QString,QVariant>& asMap();
        QSizePolicy& asSizePolicy();

        void load( QDataStream& );
        void save( QDataStream& ) const;

        static const char* typeToName( Type typ );
        static Type nameToType( const char* name );

    private:
        void detach();

        QVariantPrivate* d;
    };

    class QVariantPrivate : public QShared
    {
    public:
        QVariantPrivate();
        QVariantPrivate( QVariantPrivate* );
        ~QVariantPrivate();

        void clear();

        QVariant::Type typ;
        union
        {
            uint u;
            int i;
            bool b;
            double d;
            void *ptr;
        } value;
    };

    // These header files are down here for GCC 2.7.* compatibility
    #ifndef QT_H
    #include "qvaluelist.h"
    #include "qstringlist.h"
    #include "qmap.h"
    #endif // QT_H

    inline QVariant::Type QVariant::type() const
    {
        return d->typ;
    }

    inline bool QVariant::isValid() const
    {
        return (d->typ != Invalid);
    }

    inline QValueListConstIterator<QString> QVariant::stringListBegin() const
    {
        if ( d->typ != StringList )
            return QValueListConstIterator<QString>();
        return ((const QStringList*)d->value.ptr)->begin();
    }

    inline QValueListConstIterator<QString> QVariant::stringListEnd() const
    {
        if ( d->typ != StringList )
            return QValueListConstIterator<QString>();
        return ((const QStringList*)d->value.ptr)->end();
    }

    inline QValueListConstIterator<QVariant> QVariant::listBegin() const
    {
        if ( d->typ != List )
            return QValueListConstIterator<QVariant>();
        return ((const QValueList<QVariant>*)d->value.ptr)->begin();
    }

    inline QValueListConstIterator<QVariant> QVariant::listEnd() const
    {
        if ( d->typ != List )
            return QValueListConstIterator<QVariant>();
        return ((const QValueList<QVariant>*)d->value.ptr)->end();
    }

    inline QMapConstIterator<QString,QVariant> QVariant::mapBegin() const
    {
        if ( d->typ != Map )
            return QMapConstIterator<QString,QVariant>();
        return ((const QMap<QString,QVariant>*)d->value.ptr)->begin();
    }

    inline QMapConstIterator<QString,QVariant> QVariant::mapEnd() const
    {
        if ( d->typ != Map )
            return QMapConstIterator<QString,QVariant>();
        return ((const QMap<QString,QVariant>*)d->value.ptr)->end();
    }

    inline QMapConstIterator<QString,QVariant> QVariant::mapFind( const QString& key ) const
    {
        if ( d->typ != Map )
            return QMapConstIterator<QString,QVariant>();
        return ((const QMap<QString,QVariant>*)d->value.ptr)->find( key );
    }

    Q_EXPORT QDataStream& operator>> ( QDataStream& s, QVariant& p );
    Q_EXPORT QDataStream& operator<< ( QDataStream& s, const QVariant& p );
    Q_EXPORT QDataStream& operator>> ( QDataStream& s, QVariant::Type& p );
    Q_EXPORT QDataStream& operator<< ( QDataStream& s, const QVariant::Type p );

    #endif // QT_NO_VARIANT

    #endif // QVARIANT_H