diff -r 000000000000 -r 1918ee327afb tools/designer/src/components/propertyeditor/previewframe.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/designer/src/components/propertyeditor/previewframe.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,119 @@
+/****************************************************************************
+**
+** 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 Qt Designer 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 "previewframe.h"
+#include "previewwidget.h"
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QDebug>
+#include <QtGui/QPainter>
+#include <QtGui/QMdiArea>
+#include <QtGui/QMdiSubWindow>
+#include <QtGui/QPaintEvent>
+
+QT_BEGIN_NAMESPACE
+
+namespace qdesigner_internal {
+
+    class PreviewMdiArea: public QMdiArea {
+    public:
+        PreviewMdiArea(QWidget *parent = 0) : QMdiArea(parent) {}
+    protected:
+        bool viewportEvent ( QEvent * event );
+    };
+
+    bool PreviewMdiArea::viewportEvent (QEvent * event) {
+        if (event->type() != QEvent::Paint)
+            return QMdiArea::viewportEvent (event);
+        QWidget *paintWidget = viewport();
+        QPainter p(paintWidget);
+        p.fillRect(rect(), paintWidget->palette().color(backgroundRole()).dark());
+        p.setPen(QPen(Qt::white));
+        //: Palette editor background
+        p.drawText(0, height() / 2,  width(), height(), Qt::AlignHCenter,
+                   QCoreApplication::translate("qdesigner_internal::PreviewMdiArea", "The moose in the noose\nate the goose who was loose."));
+        return true;
+    }
+
+PreviewFrame::PreviewFrame(QWidget *parent) :
+    QFrame(parent),
+    m_mdiArea(new PreviewMdiArea(this))
+{
+    m_mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    m_mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
+    setLineWidth(1);
+
+    QVBoxLayout *vbox = new QVBoxLayout(this);
+    vbox->setMargin(0);
+    vbox->addWidget(m_mdiArea);
+
+    setMinimumSize(ensureMdiSubWindow()->minimumSizeHint());
+}
+
+void PreviewFrame::setPreviewPalette(const QPalette &pal)
+{
+    ensureMdiSubWindow()->widget()->setPalette(pal);
+}
+
+void PreviewFrame::setSubWindowActive(bool active)
+{
+    m_mdiArea->setActiveSubWindow (active ? ensureMdiSubWindow() : static_cast<QMdiSubWindow *>(0));
+}
+
+QMdiSubWindow *PreviewFrame::ensureMdiSubWindow()
+{
+    if (!m_mdiSubWindow) {
+        PreviewWidget *previewWidget = new PreviewWidget(m_mdiArea);
+        m_mdiSubWindow = m_mdiArea->addSubWindow(previewWidget, Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint);
+        m_mdiSubWindow->move(10,10);
+        m_mdiSubWindow->showMaximized();
+    }
+
+    const Qt::WindowStates state = m_mdiSubWindow->windowState();
+    if (state & Qt::WindowMinimized)
+        m_mdiSubWindow->setWindowState(state & ~Qt::WindowMinimized);
+
+    return m_mdiSubWindow;
+}
+}
+
+QT_END_NAMESPACE