Long live Qt 4.5!

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diff --git a/doc/src/snippets/plaintextlayout/window.cpp b/doc/src/snippets/plaintextlayout/window.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <math.h>
+
+#include "window.h"
+
+Window::Window(QWidget *parent)
+    : QWidget(parent)
+{
+    text = QString("Support for text rendering and layout in Qt 4 has been "
+                   "redesigned around a system that allows textual content to "
+                   "be represented in a more flexible way than was possible "
+                   "with Qt 3. Qt 4 also provides a more convenient "
+                   "programming interface for editing documents. These "
+                   "improvements are made available through a reimplementation "
+                   "of the existing text rendering engine, and the "
+                   "introduction of several new classes. "
+                   "See the relevant module overview for a detailed discussion "
+                   "of this framework. The following sections provide a brief "
+                   "overview of the main concepts behind Scribe.");
+
+    setWindowTitle(tr("Plain Text Layout"));
+}
+
+void Window::paintEvent(QPaintEvent *event)
+{
+//! [0]
+    QTextLayout textLayout(text, font);
+    qreal margin = 10;
+    qreal radius = qMin(width()/2.0, height()/2.0) - margin;
+    QFontMetrics fm(font);
+
+    qreal lineHeight = fm.height();
+    qreal y = 0;
+
+    textLayout.beginLayout();
+
+    while (1) {
+        // create a new line 
+        QTextLine line = textLayout.createLine();
+        if (!line.isValid())
+            break;
+
+        qreal x1 = qMax(0.0, pow(pow(radius,2)-pow(radius-y,2), 0.5));
+        qreal x2 = qMax(0.0, pow(pow(radius,2)-pow(radius-(y+lineHeight),2), 0.5));
+        qreal x = qMax(x1, x2) + margin;
+        qreal lineWidth = (width() - margin) - x;
+
+        line.setLineWidth(lineWidth);
+        line.setPosition(QPointF(x, margin+y));
+        y += line.height();
+    }
+
+    textLayout.endLayout();
+
+    QPainter painter;
+    painter.begin(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.fillRect(rect(), Qt::white);
+    painter.setBrush(QBrush(Qt::black));
+    painter.setPen(QPen(Qt::black));
+    textLayout.draw(&painter, QPoint(0,0));
+
+    painter.setBrush(QBrush(QColor("#a6ce39")));
+    painter.setPen(QPen(Qt::black));
+    painter.drawEllipse(QRectF(-radius, margin, 2*radius, 2*radius));
+    painter.end();
+//! [0]
+}