|  | Home · All Classes · Main Classes · Annotated · Grouped Classes · Functions |

# model.h Example File
demos/interview/model.h

        /****************************************************************************
        **
        ** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
        **
        ** 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 MODEL_H
        #define MODEL_H

        #include <qabstractitemmodel.h>
        #include <qvector.h>

        class Model : public QAbstractItemModel
        {
            Q_OBJECT

        public:
            Model(int rows, int columns, QObject *parent = 0);
            ~Model();

            QModelIndex index(int row, int column, const QModelIndex &parent) const;
            QModelIndex parent(const QModelIndex &child) const;

            int rowCount(const QModelIndex &parent) const;
            int columnCount(const QModelIndex &parent) const;

            QVariant data(const QModelIndex &index, int role) const;
            QVariant headerData(int section, Qt::Orientation orientation, int role) const;

            bool hasChildren(const QModelIndex &parent) const;
            Qt::ItemFlags flags(const QModelIndex &index) const;
            bool isDragEnabled(const QModelIndex &index) const;

        private:

            struct Node
            {
                Node(Node *parent = 0) : parent(parent), children(0) {}
                ~Node() { delete children; }
                Node *parent;
                QVector<Node> *children;
            };

            Node *node(int row, Node *parent) const;
            Node *parent(Node *child) const;
            int row(Node *node) const;

            int rc, cc;
            QVector<Node> *tree;
        };

        #endif