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# qobjectxmlmodel.h Example File
xmlpatterns/qobjectxmlmodel/qobjectxmlmodel.h

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     #ifndef Patternist_QObjectNodeModel_H
     #define Patternist_QObjectNodeModel_H

     #include <QSimpleXmlNodeModel>

     QT_BEGIN_HEADER
     class QObject;
     class PropertyToAtomicValue;

     /**
      * @short Delegates QtCore's QObject into Patternist's QAbstractXmlNodeModel.
      * known as pre/post numbering.
      *
      * QObjectXmlModel sets the toggle on QXmlNodeModelIndex to @c true, if it
      * represents a property of the QObject. That is, if the QXmlNodeModelIndex is
      * an attribute.
      *
      * @author Frans Englich <fenglich@trolltech.com>
      */
     class QObjectXmlModel : public QSimpleXmlNodeModel
     {
       public:
         QObjectXmlModel(QObject *const object, const QXmlNamePool &np);

         QXmlNodeModelIndex root() const;

         virtual QXmlNodeModelIndex::DocumentOrder compareOrder(const QXmlNodeModelIndex &n1, const QXmlNodeModelIndex &n2) const;
         virtual QXmlName name(const QXmlNodeModelIndex &n) const;
         virtual QUrl documentUri(const QXmlNodeModelIndex &n) const;
         virtual QXmlNodeModelIndex::NodeKind kind(const QXmlNodeModelIndex &n) const;
         virtual QXmlNodeModelIndex root(const QXmlNodeModelIndex &n) const;
         virtual QVariant typedValue(const QXmlNodeModelIndex &n) const;
         virtual QVector<QXmlNodeModelIndex> attributes(const QXmlNodeModelIndex&) const;
         virtual QXmlNodeModelIndex nextFromSimpleAxis(SimpleAxis, const QXmlNodeModelIndex&) const;

       private:
         /**
          * The highest three bits are used to signify whether the node index
          * is an artificial node.
          *
          * @short if QXmlNodeModelIndex::additionalData() has the
          * QObjectPropery flag set, then the QXmlNodeModelIndex is an
          * attribute of the QObject element, and the remaining bits form
          * an offset to the QObject property that the QXmlNodeModelIndex
          * refers to.
          *
          */
         enum QObjectNodeType
         {
             IsQObject               = 0,
             QObjectProperty         = 1 << 26,
             MetaObjects             = 2 << 26,
             MetaObject              = 3 << 26,
             MetaObjectClassName     = 4 << 26,
             MetaObjectSuperClass    = 5 << 26,
             QObjectClassName        = 6 << 26
         };

         typedef QVector<const QMetaObject *> AllMetaObjects;
         AllMetaObjects allMetaObjects() const;

         static QObjectNodeType toNodeType(const QXmlNodeModelIndex &n);
         static bool isTypeSupported(QVariant::Type type);
         static inline QObject *asQObject(const QXmlNodeModelIndex &n);
         static inline bool isProperty(const QXmlNodeModelIndex n);
         static inline QMetaProperty toMetaProperty(const QXmlNodeModelIndex &n);
         /**
          * Returns the ancestors of @p n. Does therefore not include
          * @p n.
          */
         inline QXmlNodeModelIndex::List ancestors(const QXmlNodeModelIndex n) const;
         QXmlNodeModelIndex qObjectSibling(const int pos,
                                           const QXmlNodeModelIndex &n) const;
         QXmlNodeModelIndex metaObjectSibling(const int pos,
                                              const QXmlNodeModelIndex &n) const;

         const QUrl              m_baseURI;
         QObject *const          m_root;
         const AllMetaObjects    m_allMetaObjects;
     };

     QT_END_HEADER

     #endif