diff -r 000000000000 -r 1918ee327afb examples/opengl/2dpainting/glwidget.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/opengl/2dpainting/glwidget.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** 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 "glwidget.h"
+#include "helper.h"
+
+//! [0]
+GLWidget::GLWidget(Helper *helper, QWidget *parent)
+    : QGLWidget(QGLFormat(QGL::SampleBuffers), parent), helper(helper)
+{
+    elapsed = 0;
+    setFixedSize(200, 200);
+    setAutoFillBackground(false);
+}
+//! [0]
+
+//! [1]
+void GLWidget::animate()
+{
+    elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
+    repaint();
+}
+//! [1]
+
+//! [2]
+void GLWidget::paintEvent(QPaintEvent *event)
+{
+    QPainter painter;
+    painter.begin(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+    helper->paint(&painter, event, elapsed);
+    painter.end();
+}
+//! [2]