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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "model.h"
+#include <QIcon>
+#include <QPixmap>
+
+Model::Model(int rows, int columns, QObject *parent)
+ : QAbstractItemModel(parent),
+ rc(rows), cc(columns),
+ tree(new QVector<Node>(rows, Node(0)))
+{
+
+}
+
+Model::~Model()
+{
+ delete tree;
+}
+
+QModelIndex Model::index(int row, int column, const QModelIndex &parent) const
+{
+ if (row < rc && row >= 0 && column < cc && column >= 0) {
+ Node *p = static_cast<Node*>(parent.internalPointer());
+ Node *n = node(row, p);
+ if (n)
+ return createIndex(row, column, n);
+ }
+ return QModelIndex();
+}
+
+QModelIndex Model::parent(const QModelIndex &child) const
+{
+ if (child.isValid()) {
+ Node *n = static_cast<Node*>(child.internalPointer());
+ Node *p = parent(n);
+ if (p)
+ return createIndex(row(p), 0, p);
+ }
+ return QModelIndex();
+}
+
+int Model::rowCount(const QModelIndex &parent) const
+{
+ return (parent.isValid() && parent.column() != 0) ? 0 : rc;
+}
+
+int Model::columnCount(const QModelIndex &parent) const
+{
+ Q_UNUSED(parent);
+ return cc;
+}
+
+QVariant Model::data(const QModelIndex &index, int role) const
+{
+ if (!index.isValid())
+ return QVariant();
+ if (role == Qt::DisplayRole)
+ return "Item " + QString::number(index.row()) + ":" + QString::number(index.column());
+ if (role == Qt::DecorationRole) {
+ if (index.column() == 0)
+ return iconProvider.icon(QFileIconProvider::Folder);
+ return iconProvider.icon(QFileIconProvider::File);
+ }
+ return QVariant();
+}
+
+QVariant Model::headerData(int section, Qt::Orientation orientation, int role) const
+{
+ static QIcon services(QPixmap(":/images/services.png"));
+ if (role == Qt::DisplayRole)
+ return QString::number(section);
+ if (role == Qt::DecorationRole)
+ return qVariantFromValue(services);
+ return QAbstractItemModel::headerData(section, orientation, role);
+}
+
+bool Model::hasChildren(const QModelIndex &parent) const
+{
+ if (parent.isValid() && parent.column() != 0)
+ return false;
+ return rc > 0 && cc > 0;
+}
+
+Qt::ItemFlags Model::flags(const QModelIndex &index) const
+{
+ if (!index.isValid())
+ return 0;
+ return (Qt::ItemIsDragEnabled|Qt::ItemIsSelectable|Qt::ItemIsEnabled);
+}
+
+Model::Node *Model::node(int row, Node *parent) const
+{
+ if (parent && !parent->children)
+ parent->children = new QVector<Node>(rc, Node(parent));
+ QVector<Node> *v = parent ? parent->children : tree;
+ return const_cast<Node*>(&(v->at(row)));
+}
+
+Model::Node *Model::parent(Node *child) const
+{
+ return child ? child->parent : 0;
+}
+
+int Model::row(Node *node) const
+{
+ const Node *first = node->parent ? &(node->parent->children->at(0)) : &(tree->at(0));
+ return (node - first);
+}