diff -r 000000000000 -r 1918ee327afb examples/itemviews/editabletreemodel/mainwindow.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/itemviews/editabletreemodel/mainwindow.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,181 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+#include "treemodel.h"
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+{
+    setupUi(this);
+
+    QStringList headers;
+    headers << tr("Title") << tr("Description");
+
+    QFile file(":/default.txt");
+    file.open(QIODevice::ReadOnly);
+    TreeModel *model = new TreeModel(headers, file.readAll());
+    file.close();
+
+    view->setModel(model);
+    for (int column = 0; column < model->columnCount(); ++column)
+        view->resizeColumnToContents(column);
+
+    connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
+
+    connect(view->selectionModel(),
+            SIGNAL(selectionChanged(const QItemSelection &,
+                                    const QItemSelection &)),
+            this, SLOT(updateActions()));
+
+    connect(actionsMenu, SIGNAL(aboutToShow()), this, SLOT(updateActions()));
+    connect(insertRowAction, SIGNAL(triggered()), this, SLOT(insertRow()));
+    connect(insertColumnAction, SIGNAL(triggered()), this, SLOT(insertColumn()));
+    connect(removeRowAction, SIGNAL(triggered()), this, SLOT(removeRow()));
+    connect(removeColumnAction, SIGNAL(triggered()), this, SLOT(removeColumn()));
+    connect(insertChildAction, SIGNAL(triggered()), this, SLOT(insertChild()));
+
+    updateActions();
+}
+
+void MainWindow::insertChild()
+{
+    QModelIndex index = view->selectionModel()->currentIndex();
+    QAbstractItemModel *model = view->model();
+
+    if (model->columnCount(index) == 0) {
+        if (!model->insertColumn(0, index))
+            return;
+    }
+
+    if (!model->insertRow(0, index))
+        return;
+
+    for (int column = 0; column < model->columnCount(index); ++column) {
+        QModelIndex child = model->index(0, column, index);
+        model->setData(child, QVariant("[No data]"), Qt::EditRole);
+        if (!model->headerData(column, Qt::Horizontal).isValid())
+            model->setHeaderData(column, Qt::Horizontal, QVariant("[No header]"),
+                                 Qt::EditRole);
+    }
+
+    view->selectionModel()->setCurrentIndex(model->index(0, 0, index),
+                                            QItemSelectionModel::ClearAndSelect);
+    updateActions();
+}
+
+bool MainWindow::insertColumn(const QModelIndex &parent)
+{
+    QAbstractItemModel *model = view->model();
+    int column = view->selectionModel()->currentIndex().column();
+
+    // Insert a column in the parent item.
+    bool changed = model->insertColumn(column + 1, parent);
+    if (changed)
+        model->setHeaderData(column + 1, Qt::Horizontal, QVariant("[No header]"),
+                             Qt::EditRole);
+
+    updateActions();
+
+    return changed;
+}
+
+void MainWindow::insertRow()
+{
+    QModelIndex index = view->selectionModel()->currentIndex();
+    QAbstractItemModel *model = view->model();
+
+    if (!model->insertRow(index.row()+1, index.parent()))
+        return;
+
+    updateActions();
+
+    for (int column = 0; column < model->columnCount(index.parent()); ++column) {
+        QModelIndex child = model->index(index.row()+1, column, index.parent());
+        model->setData(child, QVariant("[No data]"), Qt::EditRole);
+    }
+}
+
+bool MainWindow::removeColumn(const QModelIndex &parent)
+{
+    QAbstractItemModel *model = view->model();
+    int column = view->selectionModel()->currentIndex().column();
+
+    // Insert columns in each child of the parent item.
+    bool changed = model->removeColumn(column, parent);
+
+    if (!parent.isValid() && changed)
+        updateActions();
+
+    return changed;
+}
+
+void MainWindow::removeRow()
+{
+    QModelIndex index = view->selectionModel()->currentIndex();
+    QAbstractItemModel *model = view->model();
+    if (model->removeRow(index.row(), index.parent()))
+        updateActions();
+}
+
+void MainWindow::updateActions()
+{
+    bool hasSelection = !view->selectionModel()->selection().isEmpty();
+    removeRowAction->setEnabled(hasSelection);
+    removeColumnAction->setEnabled(hasSelection);
+
+    bool hasCurrent = view->selectionModel()->currentIndex().isValid();
+    insertRowAction->setEnabled(hasCurrent);
+    insertColumnAction->setEnabled(hasCurrent);
+
+    if (hasCurrent) {
+        view->closePersistentEditor(view->selectionModel()->currentIndex());
+
+        int row = view->selectionModel()->currentIndex().row();
+        int column = view->selectionModel()->currentIndex().column();
+        if (view->selectionModel()->currentIndex().parent().isValid())
+            statusBar()->showMessage(tr("Position: (%1,%2)").arg(row).arg(column));
+        else
+            statusBar()->showMessage(tr("Position: (%1,%2) in top level").arg(row).arg(column));
+    }
+}