diff -r 000000000000 -r 1918ee327afb examples/graphicsview/flowlayout/flowlayout.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/graphicsview/flowlayout/flowlayout.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,214 @@
+/****************************************************************************
+**
+** 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 "flowlayout.h"
+#include <QtGui/qwidget.h>
+#include <QtCore/qmath.h>
+
+FlowLayout::FlowLayout()
+{
+    m_spacing[0] = 6;
+    m_spacing[1] = 6;
+    QSizePolicy sp = sizePolicy();
+    sp.setHeightForWidth(true);
+    setSizePolicy(sp);
+}
+
+void FlowLayout::insertItem(int index, QGraphicsLayoutItem *item)
+{
+    item->setParentLayoutItem(this);
+    if (uint(index) > uint(m_items.count()))
+        index = m_items.count();
+    m_items.insert(index, item);
+    invalidate();
+}
+
+int FlowLayout::count() const
+{
+    return m_items.count();
+}
+
+QGraphicsLayoutItem *FlowLayout::itemAt(int index) const
+{
+    return m_items.value(index);
+}
+
+void FlowLayout::removeAt(int index)
+{
+    m_items.removeAt(index);
+    invalidate();
+}
+
+qreal FlowLayout::spacing(Qt::Orientation o) const
+{
+    return m_spacing[int(o) - 1];
+}
+
+void FlowLayout::setSpacing(Qt::Orientations o, qreal spacing)
+{
+    if (o & Qt::Horizontal)
+        m_spacing[0] = spacing;
+    if (o & Qt::Vertical)
+        m_spacing[1] = spacing;
+}
+
+void FlowLayout::setGeometry(const QRectF &geom)
+{
+    QGraphicsLayout::setGeometry(geom);
+    doLayout(geom, true);
+}
+
+qreal FlowLayout::doLayout(const QRectF &geom, bool applyNewGeometry) const
+{
+    qreal left, top, right, bottom;
+    getContentsMargins(&left, &top, &right, &bottom);
+    const qreal maxw = geom.width() - left - right;
+
+    qreal x = 0;
+    qreal y = 0;
+    qreal maxRowHeight = 0;
+    QSizeF pref;
+    for (int i = 0; i < m_items.count(); ++i) {
+        QGraphicsLayoutItem *item = m_items.at(i);
+        pref = item->effectiveSizeHint(Qt::PreferredSize);
+        maxRowHeight = qMax(maxRowHeight, pref.height());
+
+        qreal next_x;
+        next_x = x + pref.width();
+        if (next_x > maxw) {
+            if (x == 0) {
+                pref.setWidth(maxw);
+            } else {
+                x = 0;
+                next_x = pref.width();
+            }
+            y += maxRowHeight + spacing(Qt::Vertical);
+            maxRowHeight = 0;
+        }
+
+        if (applyNewGeometry)
+            item->setGeometry(QRectF(QPointF(left + x, top + y), pref));
+        x = next_x + spacing(Qt::Horizontal);
+    }
+    maxRowHeight = qMax(maxRowHeight, pref.height());
+    return top + y + maxRowHeight + bottom;
+}
+
+QSizeF FlowLayout::minSize(const QSizeF &constraint) const
+{
+    QSizeF size(0, 0);
+    qreal left, top, right, bottom;
+    getContentsMargins(&left, &top, &right, &bottom);
+    if (constraint.width() >= 0) {   // height for width
+        const qreal height = doLayout(QRectF(QPointF(0,0), constraint), false);
+        size = QSizeF(constraint.width(), height);
+    } else if (constraint.height() >= 0) {  // width for height?
+        // not supported
+    } else {
+        QGraphicsLayoutItem *item;
+        foreach (item, m_items)
+            size = size.expandedTo(item->effectiveSizeHint(Qt::MinimumSize));
+        size += QSize(left + right, top + bottom);
+    }
+    return size;
+}
+
+QSizeF FlowLayout::prefSize() const
+{
+    qreal left, right;
+    getContentsMargins(&left, 0, &right, 0);
+
+    QGraphicsLayoutItem *item;
+    qreal maxh = 0;
+    qreal totalWidth = 0;
+    foreach (item, m_items) {
+        if (totalWidth > 0)
+            totalWidth += spacing(Qt::Horizontal);
+        QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
+        totalWidth += pref.width();
+        maxh = qMax(maxh, pref.height());
+    }
+    maxh += spacing(Qt::Vertical);
+
+    const qreal goldenAspectRatio = 1.61803399;
+    qreal w = qSqrt(totalWidth * maxh * goldenAspectRatio) + left + right;
+
+    return minSize(QSizeF(w, -1));
+}
+
+QSizeF FlowLayout::maxSize() const
+{
+    QGraphicsLayoutItem *item;
+    qreal totalWidth = 0;
+    qreal totalHeight = 0;
+    foreach (item, m_items) {
+        if (totalWidth > 0)
+            totalWidth += spacing(Qt::Horizontal);
+        if (totalHeight > 0)
+            totalHeight += spacing(Qt::Vertical);
+        QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
+        totalWidth += pref.width();
+        totalHeight += pref.height();
+    }
+
+    qreal left, top, right, bottom;
+    getContentsMargins(&left, &top, &right, &bottom);
+    return QSizeF(left + totalWidth + right, top + totalHeight + bottom);
+}
+
+QSizeF FlowLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
+{
+    QSizeF sh = constraint;
+    switch (which) {
+    case Qt::PreferredSize:
+        sh = prefSize();
+        break;
+    case Qt::MinimumSize:
+        sh = minSize(constraint);
+        break;
+    case Qt::MaximumSize:
+        sh = maxSize();
+        break;
+    default:
+        break;
+    }
+    return sh;
+}