/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "model.h"+
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#include <QIcon>+
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#include <QPixmap>+
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+
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Model::Model(int rows, int columns, QObject *parent)+
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    : QAbstractItemModel(parent),+
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      services(QPixmap(":/images/services.png")),+
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      rc(rows), cc(columns),+
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      tree(new QVector<Node>(rows, Node(0)))+
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{+
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+
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}+
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+
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Model::~Model()+
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{+
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    delete tree;+
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}+
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+
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QModelIndex Model::index(int row, int column, const QModelIndex &parent) const+
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{+
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    if (row < rc && row >= 0 && column < cc && column >= 0) {+
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        Node *p = static_cast<Node*>(parent.internalPointer());+
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        Node *n = node(row, p);+
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	if (n)+
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	    return createIndex(row, column, n);+
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    }+
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    return QModelIndex();+
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}+
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+
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QModelIndex Model::parent(const QModelIndex &child) const+
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{+
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    if (child.isValid()) {+
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        Node *n = static_cast<Node*>(child.internalPointer());+
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        Node *p = parent(n);+
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        if (p)+
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            return createIndex(row(p), 0, p);+
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    }+
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    return QModelIndex();+
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}+
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+
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int Model::rowCount(const QModelIndex &parent) const+
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{+
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    return (parent.isValid() && parent.column() != 0) ? 0 : rc;+
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}+
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+
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int Model::columnCount(const QModelIndex &parent) const+
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{+
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    Q_UNUSED(parent);+
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    return cc;+
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}+
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+
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QVariant Model::data(const QModelIndex &index, int role) const+
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{+
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    if (!index.isValid())+
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        return QVariant();+
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    if (role == Qt::DisplayRole)+
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	return "Item " + QString::number(index.row()) + ":" + QString::number(index.column());+
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    if (role == Qt::DecorationRole) {+
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        if (index.column() == 0)+
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            return iconProvider.icon(QFileIconProvider::Folder);+
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        return iconProvider.icon(QFileIconProvider::File);+
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    }+
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    return QVariant();+
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}+
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+
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QVariant Model::headerData(int section, Qt::Orientation orientation, int role) const+
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{+
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    if (role == Qt::DisplayRole)+
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        return QString::number(section);+
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    if (role == Qt::DecorationRole)+
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        return qVariantFromValue(services);+
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    return QAbstractItemModel::headerData(section, orientation, role);+
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}+
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+
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bool Model::hasChildren(const QModelIndex &parent) const+
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{+
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    if (parent.isValid() && parent.column() != 0)+
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        return false;+
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    return rc > 0 && cc > 0;+
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}+
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+
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Qt::ItemFlags Model::flags(const QModelIndex &index) const+
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{+
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    if (!index.isValid())+
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        return 0;+
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    return (Qt::ItemIsDragEnabled|Qt::ItemIsSelectable|Qt::ItemIsEnabled);+
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}+
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+
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Model::Node *Model::node(int row, Node *parent) const+
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{+
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    if (parent && !parent->children)+
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	parent->children = new QVector<Node>(rc, Node(parent));+
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    QVector<Node> *v = parent ? parent->children : tree;+
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    return const_cast<Node*>(&(v->at(row)));+
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}+
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+
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Model::Node *Model::parent(Node *child) const+
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{+
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    return child ? child->parent : 0;+
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}+
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+
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int Model::row(Node *node) const+
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{+
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     const Node *first = node->parent ? &(node->parent->children->at(0)) : &(tree->at(0));+
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     return (node - first);+
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}+
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