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

     /****************************************************************************
     **
     ** Copyright (C) 2006-$THISYEAR$ $TROLLTECH$. All rights reserved.
     **
     ** This file is part of the $MODULE$ of the Qt Toolkit.
     **
     ** $TROLLTECH_DUAL_LICENSE$
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #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;

         /**
          * @short Returns the same as baseURI().
          */
         virtual QUrl documentUri(const QXmlNodeModelIndex &ni) const;

         virtual QXmlNodeModelIndex::NodeKind kind(const QXmlNodeModelIndex &ni) const;
         virtual QXmlNodeModelIndex::DocumentOrder compareOrder(const QXmlNodeModelIndex &ni1, const QXmlNodeModelIndex &ni2) const;
         virtual QXmlNodeModelIndex root(const QXmlNodeModelIndex &n) const;
         virtual QXmlNodeModelIndex parent(const QXmlNodeModelIndex &ni) const;
         virtual QXmlName name(const QXmlNodeModelIndex &ni) const;
         virtual QVariant typedValue(const QXmlNodeModelIndex &n) const;
         virtual QXmlNodeModelIndex nextFromSimpleAxis(SimpleAxis, const QXmlNodeModelIndex&) const;
         virtual QVector<QXmlNodeModelIndex> attributes(const QXmlNodeModelIndex&) const;

     private:
         /**
          * The highest three bits are used to signify whether the node index
          * is an artificial node.
          */
         enum QObjectNodeType
         {
             IsQObject               = 0,
             /**
              * @short if QXmlNodeModelIndex::additionalData() has this flag set, then
              * the QXmlNodeModelIndex is an attribute of the QObject element, and the
              * remaining bits forms an offset to the QObject's property
              * that this QXmlNodeModelIndex corresponds to.
              */
             QObjectProperty         = 1 << 26,
             MetaObjects             = 2 << 26,
             MetaObject              = 3 << 26,

             /**
              * metaObjects/metaObject/@superClass
              */
             MetaObjectClassName     = 4 << 26,
             /**
              * metaObjects/metaObject/@superClass
              */
             MetaObjectSuperClass    = 5 << 26,
             /**
              * QObject/@className
              */
             QObjectClassName        = 6 << 26
         };

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

         static QObjectNodeType toNodeType(const QXmlNodeModelIndex &ni);

         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 &ni) const;
         QXmlNodeModelIndex metaObjectSibling(const int pos,
                                              const QXmlNodeModelIndex &ni) const;

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

     QT_END_HEADER

     #endif