--- /dev/null
+/****************************************************************************
+**
+** 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 Qt Components project.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 1.1
+
+Item {
+ // relative (0..1) position of top and bottom
+ property real positionRatio
+ property real sizeRatio
+
+ // max position and min size
+ property real maxPosition
+ property real minSize
+
+ // size underflow
+ property real sizeUnderflow: (sizeRatio * maxPosition) < minSize ? minSize - (sizeRatio * maxPosition) : 0
+
+ // raw start and end position considering minimum size
+ property real rawStartPos: positionRatio * (maxPosition - sizeUnderflow)
+ property real rawEndPos: (positionRatio + sizeRatio) * (maxPosition - sizeUnderflow) + sizeUnderflow
+
+ // overshoot amount at start and end
+ property real overshootStart: rawStartPos < 0 ? -rawStartPos : 0
+ property real overshootEnd: rawEndPos > maxPosition ? rawEndPos - maxPosition : 0
+
+ // overshoot adjusted start and end
+ property real adjStartPos: rawStartPos + overshootStart
+ property real adjEndPos: rawEndPos - overshootStart - overshootEnd
+
+ // final position and size of thumb
+ property int position: 0.5 + (adjStartPos + minSize > maxPosition ? maxPosition - minSize : adjStartPos)
+ property int size: 0.5 + ((adjEndPos - position) < minSize ? minSize : (adjEndPos - position))
+}
+