diff -r 41300fa6a67c -r f7bc934e204c util/demos/qtdemo/guideline.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/demos/qtdemo/guideline.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,81 @@
+/****************************************************************************
+**
+** 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 demonstration applications 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 "guideline.h"
+#include <cmath>
+
+GuideLine::GuideLine(const QLineF &line, Guide *follows) : Guide(follows)
+{
+    this->line = line;
+}
+
+GuideLine::GuideLine(const QPointF &end, Guide *follows) : Guide(follows)
+{
+    if (follows)
+        this->line = QLineF(prevGuide->endPos(), end);
+    else
+        this->line = QLineF(QPointF(0, 0), end);
+}
+
+float GuideLine::length()
+{
+    return line.length();
+}
+
+QPointF GuideLine::startPos()
+{
+    return QPointF(this->line.p1().x() * scaleX, this->line.p1().y() * scaleY);
+}
+
+QPointF GuideLine::endPos()
+{
+    return QPointF(this->line.p2().x() * scaleX, this->line.p2().y() * scaleY);
+}
+
+void GuideLine::guide(DemoItem *item, float moveSpeed)
+{
+    float frame = item->guideFrame - this->startLength;
+    float endX = (this->line.p1().x() + (frame * this->line.dx() / this->length())) * scaleX;
+    float endY = (this->line.p1().y() + (frame * this->line.dy() / this->length())) * scaleY;
+    QPointF pos(endX, endY);
+    this->move(item, pos, moveSpeed);
+}
+