- Qt 5.5
- Qt XML Patterns
- File System Example
- filetree.h Example File
- Qt 5.5.1 Reference Documentation

# filetree.h Example File

filetree/filetree.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
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    **     the documentation and/or other materials provided with the
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    **     from this software without specific prior written permission.
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    #include <QtCore/QFileInfo>
    #include <QtCore/QDir>
    #include <QtCore/QVector>
    #include <QtXmlPatterns/QSimpleXmlNodeModel>

    class FileTree : public QSimpleXmlNodeModel
    {
    public:
        FileTree(const QXmlNamePool &namePool);

        QXmlNodeModelIndex nodeFor(const QString &fileName) const;

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

    private:
        enum Type {
            File,
            Directory,
            AttributeFileName,
            AttributeFilePath,
            AttributeSize,
            AttributeMIMEType,
            AttributeSuffix
        };

        inline QXmlNodeModelIndex nextSibling(const QXmlNodeModelIndex &nodeIndex,
                                              const QFileInfo &from,
                                              qint8 offset) const;
        inline const QFileInfo &toFileInfo(const QXmlNodeModelIndex &index) const;
        inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index,
                                              Type attributeName) const;
        inline QXmlNodeModelIndex toNodeIndex(const QFileInfo &index) const;

        /*
         One possible improvement is to use a hash, and use the &*&value()
         trick to get a pointer, which would be stored in data() instead
         of the index.
        */
        mutable QVector<QFileInfo>  m_fileInfos;
        const QDir::Filters         m_filterAllowAll;
        const QDir::SortFlags       m_sortFlags;
        QVector<QXmlName>           m_names;
    };