diff -r dee5afe5301f -r 3f74d0d4af4c doc/src/snippets/qtreewidgetitemiterator-using/mainwindow.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/qtreewidgetitemiterator-using/mainwindow.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** 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 documentation 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"
+
+MainWindow::MainWindow()
+{
+    QMenu *fileMenu = new QMenu(tr("&File"));
+
+    QAction *quitAction = fileMenu->addAction(tr("E&xit"));
+    quitAction->setShortcut(tr("Ctrl+Q"));
+
+    QMenu *itemsMenu = new QMenu(tr("&Items"));
+
+    insertAction = itemsMenu->addAction(tr("&Insert Item"));
+    removeAction = itemsMenu->addAction(tr("&Remove Item"));
+    removeAction->setEnabled(false);
+    itemsMenu->addSeparator();
+    ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
+    descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
+    autoSortAction = itemsMenu->addAction(tr("&Automatically Sort Items"));
+    autoSortAction->setCheckable(true);
+    itemsMenu->addSeparator();
+    QAction *findItemsAction = itemsMenu->addAction(tr("&Find Items"));
+    findItemsAction->setShortcut(tr("Ctrl+F"));
+
+    menuBar()->addMenu(fileMenu);
+    menuBar()->addMenu(itemsMenu);
+
+/*  For convenient quoting:
+    QTreeWidget *treeWidget = new QTreeWidget(this);
+*/
+    treeWidget = new QTreeWidget(this);
+    treeWidget->setColumnCount(2);
+    QStringList headers;
+    headers << tr("Subject") << tr("Default");
+    treeWidget->setHeaderLabels(headers);
+
+    connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
+    connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));
+    connect(autoSortAction, SIGNAL(triggered()), this, SLOT(updateSortItems()));
+    connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));
+    connect(findItemsAction, SIGNAL(triggered()), this, SLOT(findItems()));
+    connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
+    connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
+    connect(treeWidget,
+            SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
+            this, SLOT(updateMenus(QTreeWidgetItem *)));
+
+    setupTreeItems();
+    updateMenus(treeWidget->currentItem());
+
+    setCentralWidget(treeWidget);
+    setWindowTitle(tr("Tree Widget"));
+}
+
+void MainWindow::setupTreeItems()
+{
+    QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget);
+    planets->setText(0, tr("Planets"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Mercury"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Venus"));
+
+    QTreeWidgetItem *earthItem = new QTreeWidgetItem(planets);
+    earthItem->setText(0, tr("Earth"));
+    earthItem->setText(1, tr("Yes"));
+
+    (new QTreeWidgetItem(planets))->setText(0, tr("Mars"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Jupiter"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Saturn"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Uranus"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Neptune"));
+    (new QTreeWidgetItem(planets))->setText(0, tr("Pluto"));
+}
+
+void MainWindow::findItems()
+{
+    QString itemText = QInputDialog::getText(this, tr("Find Items"),
+        tr("Text to find:"));
+
+    if (itemText.isEmpty())
+        return;
+
+//! [0]
+    QTreeWidgetItemIterator it(treeWidget);
+    while (*it) {
+        if ((*it)->text(0) == itemText)
+            (*it)->setSelected(true);
+        ++it;
+    }
+//! [0]
+}
+
+void MainWindow::insertItem()
+{
+    QTreeWidgetItem *currentItem = treeWidget->currentItem();
+
+    if (!currentItem)
+        return;
+
+    QString itemText = QInputDialog::getText(this, tr("Insert Item"),
+        tr("Input text for the new item:"));
+
+    if (itemText.isEmpty())
+        return;
+
+    QTreeWidgetItem *parent = currentItem->parent();
+    QTreeWidgetItem *newItem;
+    if (parent)
+        newItem = new QTreeWidgetItem(parent, treeWidget->currentItem());
+    else
+        newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem());
+
+    newItem->setText(0, itemText);
+}
+
+void MainWindow::removeItem()
+{
+    QTreeWidgetItem *currentItem = treeWidget->currentItem();
+
+    if (!currentItem)
+        return;
+
+    QTreeWidgetItem *parent = currentItem->parent();
+    int index;
+
+    if (parent) {
+        index = parent->indexOfChild(treeWidget->currentItem());
+        delete parent->takeChild(index);
+    } else {
+        index = treeWidget->indexOfTopLevelItem(treeWidget->currentItem());
+        delete treeWidget->takeTopLevelItem(index);
+    }
+}
+
+void MainWindow::sortAscending()
+{
+    treeWidget->sortItems(0, Qt::AscendingOrder);
+}
+
+void MainWindow::sortDescending()
+{
+    treeWidget->sortItems(0, Qt::DescendingOrder);
+}
+
+void MainWindow::updateMenus(QTreeWidgetItem *current)
+{
+    insertAction->setEnabled(current != 0);
+    removeAction->setEnabled(current != 0);
+}
+
+void MainWindow::updateSortItems()
+{
+    ascendingAction->setEnabled(!autoSortAction->isChecked());
+    descendingAction->setEnabled(!autoSortAction->isChecked());
+
+    treeWidget->setSortingEnabled(autoSortAction->isChecked());
+}