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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [quoting modelview_a]
+#include <QTreeView>
+#include <QStandardItemModel>
+#include <QItemSelectionModel>
+#include "modelview.h"
+
+ModelView::ModelView(QWidget *parent)
+    : QMainWindow(parent)
+{
+    treeView = new QTreeView(this);
+    setCentralWidget(treeView);
+    standardModel = new QStandardItemModel ;
+    QStandardItem *rootNode = standardModel->invisibleRootItem();
+
+
+    //defining a couple of items
+    QStandardItem *americaItem = new QStandardItem("America");
+    QStandardItem *mexicoItem =  new QStandardItem("Canada");
+    QStandardItem *usaItem =     new QStandardItem("USA");
+    QStandardItem *bostonItem =  new QStandardItem("Boston");
+    QStandardItem *europeItem =  new QStandardItem("Europe");
+    QStandardItem *italyItem =   new QStandardItem("Italy");
+    QStandardItem *romeItem =    new QStandardItem("Rome");
+    QStandardItem *veronaItem =  new QStandardItem("Verona");
+
+    //building up the hierarchy
+    rootNode->    appendRow(americaItem);
+    rootNode->    appendRow(europeItem);
+    americaItem-> appendRow(mexicoItem);
+    americaItem-> appendRow(usaItem);
+    usaItem->     appendRow(bostonItem);
+    europeItem->  appendRow(italyItem);
+    italyItem->   appendRow(romeItem);
+    italyItem->   appendRow(veronaItem);
+    
+    //register the model
+    treeView->setModel(standardModel);
+    treeView->expandAll();
+
+    //selection changes shall trigger a slot
+    QItemSelectionModel *selectionModel= treeView->selectionModel();
+    connect(selectionModel, SIGNAL(selectionChanged (const QItemSelection &, const QItemSelection &)),
+            this, SLOT(selectionChangedSlot(const QItemSelection &, const QItemSelection &)));
+}
+//! [quoting modelview_a]
+
+//------------------------------------------------------------------------------------
+
+//! [quoting modelview_b]
+void ModelView::selectionChangedSlot(const QItemSelection & /*newSelection*/, const QItemSelection & /*oldSelection*/)
+{
+    const QModelIndex index = treeView->selectionModel()->currentIndex();
+    QString selectedText = index.data(Qt::DisplayRole).toString();
+    int hierarchyLevel=1;
+    QModelIndex seekRoot = index;
+    while(seekRoot.parent() != QModelIndex())
+    {
+        seekRoot = seekRoot.parent();
+        hierarchyLevel++;
+    }
+    QString showString = QString("%1, Level %2").arg(selectedText)
+                         .arg(hierarchyLevel);
+    setWindowTitle(showString);
+}
+//! [quoting modelview_b]
+
+