Qt 4.0: treemodel.h Example File (itemviews/simpletreemodel/treemodel.h)

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# treemodel.h Example File
itemviews/simpletreemodel/treemodel.h

        /****************************************************************************
        **
        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
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        #ifndef TREEMODEL_H
        #define TREEMODEL_H

        #include <QAbstractItemModel>
        #include <QModelIndex>
        #include <QVariant>

        class TreeItem;

        class TreeModel : public QAbstractItemModel
        {
            Q_OBJECT

        public:
            TreeModel(const QString &data, QObject *parent = 0);
            ~TreeModel();

            QVariant data(const QModelIndex &index, int role) const;
            Qt::ItemFlags flags(const QModelIndex &index) const;
            QVariant headerData(int section, Qt::Orientation orientation,
                                int role = Qt::DisplayRole) const;
            QModelIndex index(int row, int column,
                              const QModelIndex &parent = QModelIndex()) const;
            QModelIndex parent(const QModelIndex &index) const;
            int rowCount(const QModelIndex &parent = QModelIndex()) const;
            int columnCount(const QModelIndex &parent = QModelIndex()) const;

        private:
            void setupModelData(const QStringList &lines, TreeItem *parent);

            TreeItem *rootItem;
        };

        #endif