Qt Reference Documentation

# filetree.h Example File

xmlpatterns/filetree/filetree.h

     /****************************************************************************
     **
     ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** 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
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     **     the names of its contributors may be used to endorse or promote
     **     products derived from this software without specific prior written
     **     permission.
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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;
     };