/****************************************************************************
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 ** Copyright (C) 2004-2007 Trolltech ASA. All rights reserved.
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 ** This file is part of the demonstration applications of the Qt Toolkit.
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 ** License version 2.0 as published by the Free Software Foundation
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 ** this file.  Please review the following information to ensure GNU
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 ** In addition, as a special exception, Trolltech, as the sole copyright
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 ****************************************************************************/
 
 #ifndef MODEL_H
 #define MODEL_H
 
 #include <QAbstractItemModel>
 #include <QFileIconProvider>
 #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;
     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;
     QFileIconProvider iconProvider;
 };
 
 #endif