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diff --git a/examples/designer/containerextension/multipagewidgetplugin.cpp b/examples/designer/containerextension/multipagewidgetplugin.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtDesigner/QExtensionFactory>
+#include <QtDesigner/QExtensionManager>
+#include <QtDesigner/QDesignerFormEditorInterface>
+#include <QtDesigner/QDesignerFormWindowInterface>
+#include <QtDesigner/QDesignerContainerExtension>
+#include <QtDesigner/QDesignerPropertySheetExtension>
+
+#include <QIcon>
+#include <QtPlugin>
+
+#include "multipagewidget.h"
+#include "multipagewidgetplugin.h"
+#include "multipagewidgetextensionfactory.h"
+
+//! [0]
+MultiPageWidgetPlugin::MultiPageWidgetPlugin(QObject *parent)
+    :QObject(parent)
+{
+    initialized = false;
+}
+
+QString MultiPageWidgetPlugin::name() const
+{
+    return QLatin1String("MultiPageWidget");
+}
+
+QString MultiPageWidgetPlugin::group() const
+{
+    return QLatin1String("Display Widgets [Examples]");
+}
+
+QString MultiPageWidgetPlugin::toolTip() const
+{
+    return QString();
+}
+
+QString MultiPageWidgetPlugin::whatsThis() const
+{
+    return QString();
+}
+
+QString MultiPageWidgetPlugin::includeFile() const
+{
+    return QLatin1String("multipagewidget.h");
+}
+
+QIcon MultiPageWidgetPlugin::icon() const
+{
+    return QIcon();
+}
+
+//! [0] //! [1]
+bool MultiPageWidgetPlugin::isContainer() const
+{
+    return true;
+}
+
+//! [1] //! [2]
+QWidget *MultiPageWidgetPlugin::createWidget(QWidget *parent)
+{
+    MultiPageWidget *widget = new MultiPageWidget(parent);
+    connect(widget, SIGNAL(currentIndexChanged(int)),
+            this, SLOT(currentIndexChanged(int)));
+    connect(widget, SIGNAL(pageTitleChanged(QString)),
+            this, SLOT(pageTitleChanged(QString)));
+    return widget;
+}
+
+//! [2] //! [3]
+bool MultiPageWidgetPlugin::isInitialized() const
+{
+    return initialized;
+}
+//! [3]
+
+//! [4]
+void MultiPageWidgetPlugin::initialize(QDesignerFormEditorInterface *formEditor)
+{
+    if (initialized)
+        return;
+//! [4]
+
+//! [5]
+    QExtensionManager *manager = formEditor->extensionManager();
+//! [5] //! [6]
+    QExtensionFactory *factory = new MultiPageWidgetExtensionFactory(manager);
+
+    Q_ASSERT(manager != 0);
+    manager->registerExtensions(factory, Q_TYPEID(QDesignerContainerExtension));
+
+    initialized = true;
+}
+//! [6]
+
+//! [7]
+QString MultiPageWidgetPlugin::domXml() const
+{
+    return QLatin1String("\
+<ui language=\"c++\">\
+    <widget class=\"MultiPageWidget\" name=\"multipagewidget\">\
+        <widget class=\"QWidget\" name=\"page\" />\
+    </widget>\
+    <customwidgets>\
+        <customwidget>\
+            <class>MultiPageWidget</class>\
+            <extends>QWidget</extends>\
+            <addpagemethod>addPage</addpagemethod>\
+        </customwidget>\
+    </customwidgets>\
+</ui>");
+}
+//! [7]
+
+//! [8]
+void MultiPageWidgetPlugin::currentIndexChanged(int index)
+{
+    Q_UNUSED(index);
+    MultiPageWidget *widget = qobject_cast<MultiPageWidget*>(sender());
+//! [8] //! [9]
+    if (widget) {
+        QDesignerFormWindowInterface *form = QDesignerFormWindowInterface::findFormWindow(widget);
+        if (form)
+            form->emitSelectionChanged();
+    }
+}
+//! [9]
+
+//! [10]
+void MultiPageWidgetPlugin::pageTitleChanged(const QString &title)
+{
+    Q_UNUSED(title);
+    MultiPageWidget *widget = qobject_cast<MultiPageWidget*>(sender());
+//! [10] //! [11]
+    if (widget) {
+        QWidget *page = widget->widget(widget->currentIndex());
+        QDesignerFormWindowInterface *form;
+        form = QDesignerFormWindowInterface::findFormWindow(widget);
+//! [11]
+        if (form) {
+//! [12]
+            QDesignerFormEditorInterface *editor = form->core();
+            QExtensionManager *manager = editor->extensionManager();
+//! [12] //! [13]
+            QDesignerPropertySheetExtension *sheet;
+            sheet = qt_extension<QDesignerPropertySheetExtension*>(manager, page);
+            const int propertyIndex = sheet->indexOf(QLatin1String("windowTitle"));
+            sheet->setChanged(propertyIndex, true);
+        }
+    }
+}
+
+//! [13]
+
+//! [14]
+Q_EXPORT_PLUGIN2(containerextension, MultiPageWidgetPlugin)
+//! [14]