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diff --git a/examples/widgets/painting/concentriccircles/window.cpp b/examples/widgets/painting/concentriccircles/window.cpp
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+++ b/examples/widgets/painting/concentriccircles/window.cpp
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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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWidgets>
+
+#include "circlewidget.h"
+#include "window.h"
+
+//! [0]
+Window::Window()
+{
+    aliasedLabel = createLabel(tr("Aliased"));
+    antialiasedLabel = createLabel(tr("Antialiased"));
+    intLabel = createLabel(tr("Int"));
+    floatLabel = createLabel(tr("Float"));
+
+    QGridLayout *layout = new QGridLayout;
+    layout->addWidget(aliasedLabel, 0, 1);
+    layout->addWidget(antialiasedLabel, 0, 2);
+    layout->addWidget(intLabel, 1, 0);
+    layout->addWidget(floatLabel, 2, 0);
+//! [0]
+
+//! [1]
+    QTimer *timer = new QTimer(this);
+
+    for (int i = 0; i < 2; ++i) {
+        for (int j = 0; j < 2; ++j) {
+            circleWidgets[i][j] = new CircleWidget;
+            circleWidgets[i][j]->setAntialiased(j != 0);
+            circleWidgets[i][j]->setFloatBased(i != 0);
+
+            connect(timer, SIGNAL(timeout()),
+                    circleWidgets[i][j], SLOT(nextAnimationFrame()));
+
+            layout->addWidget(circleWidgets[i][j], i + 1, j + 1);
+        }
+    }
+//! [1] //! [2]
+    timer->start(100);
+    setLayout(layout);
+
+    setWindowTitle(tr("Concentric Circles"));
+}
+//! [2]
+
+//! [3]
+QLabel *Window::createLabel(const QString &text)
+{
+    QLabel *label = new QLabel(text);
+    label->setAlignment(Qt::AlignCenter);
+    label->setMargin(2);
+    label->setFrameStyle(QFrame::Box | QFrame::Sunken);
+    return label;
+}
+//! [3]