diff -r 000000000000 -r 1918ee327afb examples/layouts/dynamiclayouts/dialog.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/layouts/dynamiclayouts/dialog.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,170 @@
+/****************************************************************************
+**
+** 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 "dialog.h"
+
+Dialog::Dialog(QWidget *parent)
+    : QDialog(parent)
+{
+    createRotableGroupBox();
+    createOptionsGroupBox();
+    createButtonBox();
+
+    mainLayout = new QGridLayout;
+    mainLayout->addWidget(rotableGroupBox, 0, 0);
+    mainLayout->addWidget(optionsGroupBox, 1, 0);
+    mainLayout->addWidget(buttonBox, 2, 0);
+    setLayout(mainLayout);
+
+    mainLayout->setSizeConstraint(QLayout::SetMinimumSize);
+
+    setWindowTitle(tr("Dynamic Layouts"));
+}
+
+void Dialog::buttonsOrientationChanged(int index)
+{
+    mainLayout->setSizeConstraint(QLayout::SetNoConstraint);
+    setMinimumSize(0, 0);
+
+    Qt::Orientation orientation = Qt::Orientation(
+            buttonsOrientationComboBox->itemData(index).toInt());
+
+    if (orientation == buttonBox->orientation())
+        return;
+
+    mainLayout->removeWidget(buttonBox);
+
+    int spacing = mainLayout->spacing();
+
+    QSize oldSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
+    buttonBox->setOrientation(orientation);
+    QSize newSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
+
+    if (orientation == Qt::Horizontal) {
+        mainLayout->addWidget(buttonBox, 2, 0);
+        resize(size() + QSize(-oldSizeHint.width(), newSizeHint.height()));
+    } else {
+        mainLayout->addWidget(buttonBox, 0, 3, 2, 1);
+        resize(size() + QSize(newSizeHint.width(), -oldSizeHint.height()));
+    }
+
+    mainLayout->setSizeConstraint(QLayout::SetDefaultConstraint);
+}
+
+void Dialog::rotateWidgets()
+{
+    Q_ASSERT(rotableWidgets.count() % 2 == 0);
+
+    foreach (QWidget *widget, rotableWidgets)
+        rotableLayout->removeWidget(widget);
+
+    rotableWidgets.enqueue(rotableWidgets.dequeue());
+
+    const int n = rotableWidgets.count();
+    for (int i = 0; i < n / 2; ++i) {
+        rotableLayout->addWidget(rotableWidgets[n - i - 1], 0, i);
+        rotableLayout->addWidget(rotableWidgets[i], 1, i);
+    }
+}
+
+void Dialog::help()
+{
+    QMessageBox::information(this, tr("Dynamic Layouts Help"),
+                               tr("This example shows how to change layouts "
+                                  "dynamically."));
+}
+
+void Dialog::createRotableGroupBox()
+{
+    rotableGroupBox = new QGroupBox(tr("Rotable Widgets"));
+
+    rotableWidgets.enqueue(new QSpinBox);
+    rotableWidgets.enqueue(new QSlider);
+    rotableWidgets.enqueue(new QDial);
+    rotableWidgets.enqueue(new QProgressBar);
+
+    int n = rotableWidgets.count();
+    for (int i = 0; i < n; ++i) {
+        connect(rotableWidgets[i], SIGNAL(valueChanged(int)),
+                rotableWidgets[(i + 1) % n], SLOT(setValue(int)));
+    }
+
+    rotableLayout = new QGridLayout;
+    rotableGroupBox->setLayout(rotableLayout);
+
+    rotateWidgets();
+}
+
+void Dialog::createOptionsGroupBox()
+{
+    optionsGroupBox = new QGroupBox(tr("Options"));
+
+    buttonsOrientationLabel = new QLabel(tr("Orientation of buttons:"));
+
+    buttonsOrientationComboBox = new QComboBox;
+    buttonsOrientationComboBox->addItem(tr("Horizontal"), Qt::Horizontal);
+    buttonsOrientationComboBox->addItem(tr("Vertical"), Qt::Vertical);
+
+    connect(buttonsOrientationComboBox, SIGNAL(currentIndexChanged(int)),
+            this, SLOT(buttonsOrientationChanged(int)));
+
+    optionsLayout = new QGridLayout;
+    optionsLayout->addWidget(buttonsOrientationLabel, 0, 0);
+    optionsLayout->addWidget(buttonsOrientationComboBox, 0, 1);
+    optionsLayout->setColumnStretch(2, 1);
+    optionsGroupBox->setLayout(optionsLayout);
+}
+
+void Dialog::createButtonBox()
+{
+    buttonBox = new QDialogButtonBox;
+
+    closeButton = buttonBox->addButton(QDialogButtonBox::Close);
+    helpButton = buttonBox->addButton(QDialogButtonBox::Help);
+    rotateWidgetsButton = buttonBox->addButton(tr("Rotate &Widgets"),
+                                               QDialogButtonBox::ActionRole);
+
+    connect(rotateWidgetsButton, SIGNAL(clicked()), this, SLOT(rotateWidgets()));
+    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(helpButton, SIGNAL(clicked()), this, SLOT(help()));
+}