/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef MODEL_H
#define MODEL_H

#include <QAbstractItemModel>
#include <QFileIconProvider>
#include <QIcon>
#include <QVector>

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 Q_DECL_OVERRIDE;
    QModelIndex parent(const QModelIndex &child) const Q_DECL_OVERRIDE;

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

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

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

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;

    QIcon services;
    int rc;
    int cc;
    QVector<Node> *tree;
    QFileIconProvider iconProvider;
};

#endif // MODEL_H