diff -r 000000000000 -r 1918ee327afb src/gui/painting/qpaintengine_preview.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/painting/qpaintengine_preview.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,223 @@
+/****************************************************************************
+**
+** 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 QtGui module 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 <private/qpaintengine_preview_p.h>
+#include <private/qpainter_p.h>
+#include <private/qpaintengine_p.h>
+#include <private/qpicture_p.h>
+
+#include <QtGui/qprintengine.h>
+#include <QtGui/qpainter.h>
+#include <QtGui/qpicture.h>
+
+#ifndef QT_NO_PRINTPREVIEWWIDGET
+QT_BEGIN_NAMESPACE
+
+class QPreviewPaintEnginePrivate : public QPaintEnginePrivate
+{
+    Q_DECLARE_PUBLIC(QPreviewPaintEngine)
+public:
+    QPreviewPaintEnginePrivate() : state(QPrinter::Idle) {}
+    ~QPreviewPaintEnginePrivate() {}
+
+    QList<const QPicture *> pages;
+    QPaintEngine *engine;
+    QPainter *painter;
+    QPrinter::PrinterState state;
+
+    QPaintEngine *proxy_paint_engine;
+    QPrintEngine *proxy_print_engine;
+};
+
+
+QPreviewPaintEngine::QPreviewPaintEngine()
+    : QPaintEngine(*(new QPreviewPaintEnginePrivate), PaintEngineFeatures(AllFeatures & ~ObjectBoundingModeGradients))
+{
+    Q_D(QPreviewPaintEngine);
+    d->proxy_print_engine = 0;
+    d->proxy_paint_engine = 0;
+}
+
+QPreviewPaintEngine::~QPreviewPaintEngine()
+{
+    Q_D(QPreviewPaintEngine);
+
+    qDeleteAll(d->pages);
+}
+
+bool QPreviewPaintEngine::begin(QPaintDevice *)
+{
+    Q_D(QPreviewPaintEngine);
+
+    qDeleteAll(d->pages);
+    d->pages.clear();
+
+    QPicture *page = new QPicture;
+    page->d_func()->in_memory_only = true;
+    d->painter = new QPainter(page);
+    d->engine = d->painter->paintEngine();
+    d->pages.append(page);
+    d->state = QPrinter::Active;
+    return true;
+}
+
+bool QPreviewPaintEngine::end()
+{
+    Q_D(QPreviewPaintEngine);
+
+    delete d->painter;
+    d->painter = 0;
+    d->engine = 0;
+    d->state = QPrinter::Idle;
+    return true;
+}
+
+void QPreviewPaintEngine::updateState(const QPaintEngineState &state)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->updateState(state);
+}
+
+void QPreviewPaintEngine::drawPath(const QPainterPath &path)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->drawPath(path);
+}
+
+void QPreviewPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->drawPolygon(points, pointCount, mode);
+}
+
+void QPreviewPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->drawTextItem(p, textItem);
+}
+
+void QPreviewPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->drawPixmap(r, pm, sr);
+}
+
+void QPreviewPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &p)
+{
+    Q_D(QPreviewPaintEngine);
+    d->engine->drawTiledPixmap(r, pm, p);
+}
+
+bool QPreviewPaintEngine::newPage()
+{
+    Q_D(QPreviewPaintEngine);
+
+    QPicture *page = new QPicture;
+    page->d_func()->in_memory_only = true;
+    QPainter *tmp_painter = new QPainter(page);
+    QPaintEngine *tmp_engine = tmp_painter->paintEngine();
+
+    // copy the painter state from the original painter
+    Q_ASSERT(painter()->d_func()->state && tmp_painter->d_func()->state);
+    *tmp_painter->d_func()->state = *painter()->d_func()->state;
+
+    // composition modes aren't supported on a QPrinter and yields a
+    // warning, so ignore it for now
+    tmp_engine->setDirty(DirtyFlags(AllDirty & ~DirtyCompositionMode));
+    tmp_engine->syncState();
+
+    delete d->painter;
+    d->painter = tmp_painter;
+    d->pages.append(page);
+    d->engine = tmp_engine;
+    return true;
+}
+
+bool QPreviewPaintEngine::abort()
+{
+    Q_D(QPreviewPaintEngine);
+    end();
+    qDeleteAll(d->pages);
+    d->state = QPrinter::Aborted;
+
+    return true;
+}
+
+QList<const QPicture *> QPreviewPaintEngine::pages()
+{
+    Q_D(QPreviewPaintEngine);
+    return d->pages;
+}
+
+void QPreviewPaintEngine::setProxyEngines(QPrintEngine *printEngine, QPaintEngine *paintEngine)
+{
+    Q_D(QPreviewPaintEngine);
+    d->proxy_print_engine = printEngine;
+    d->proxy_paint_engine = paintEngine;
+}
+
+void QPreviewPaintEngine::setProperty(PrintEnginePropertyKey key, const QVariant &value)
+{
+    Q_D(QPreviewPaintEngine);
+    d->proxy_print_engine->setProperty(key, value);
+}
+
+QVariant QPreviewPaintEngine::property(PrintEnginePropertyKey key) const
+{
+    Q_D(const QPreviewPaintEngine);
+    return d->proxy_print_engine->property(key);
+}
+
+int QPreviewPaintEngine::metric(QPaintDevice::PaintDeviceMetric id) const
+{
+    Q_D(const QPreviewPaintEngine);
+    return d->proxy_print_engine->metric(id);
+}
+
+QPrinter::PrinterState QPreviewPaintEngine::printerState() const
+{
+    Q_D(const QPreviewPaintEngine);
+    return d->state;
+}
+
+QT_END_NAMESPACE
+
+#endif