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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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 "mainwindow.h"
+
+MainWindow::MainWindow(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 MainWindow::selectionChangedSlot(const QItemSelection & /*newSelection*/, const QItemSelection & /*oldSelection*/)
+{
+ //get the text of the selected item
+ const QModelIndex index = treeView->selectionModel()->currentIndex();
+ QString selectedText = index.data(Qt::DisplayRole).toString();
+ //find out the hierarchy level of the selected item
+ 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]
+
+