Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

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

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** This file is part of the demonstration applications of the Qt Toolkit.
 **
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License versions 2.0 or 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 GNU General Public Licensing requirements will be met:
 ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
 ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
 ** exception, Nokia gives you certain additional rights. These rights
 ** are described in the Nokia Qt GPL Exception version 1.3, included in
 ** the file GPL_EXCEPTION.txt in this package.
 **
 ** Qt for Windows(R) Licensees
 ** As a special exception, Nokia, as the sole copyright holder for Qt
 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
 ** right for the Qt/Eclipse Integration to link to functionality
 ** provided by Qt Designer and its related libraries.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 **
 ****************************************************************************/

 #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