1 files changed, 92 insertions, 0 deletions
diff --git a/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcache.cpp b/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcache.cpp
new file mode 100644
index 0000000000..caf06d6884
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+++ b/tests/benchmarks/gui/graphicsview/functional/GraphicsViewBenchmark/widgets/listitemcache.cpp
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** 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 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 <QGraphicsItem>
+#include <QPainter>
+#include <QDebug>
+#include "listitemcache.h"
+
+ListItemCache::ListItemCache()
+{
+}
+
+ListItemCache::~ListItemCache()
+{
+    QPixmapCache::remove(m_cacheKey);
+}
+
+void ListItemCache::draw(QPainter * painter) 
+{
+    QRectF irect = sourceBoundingRect(Qt::LogicalCoordinates);
+    QRectF vrect = painter->clipPath().boundingRect();
+
+    if (vrect.intersects(irect)) {
+        QRectF newVisibleRect = irect.intersected(vrect);
+        QPixmap pixmap;
+
+        if (!QPixmapCache::find(m_cacheKey, &pixmap) ||
+            m_visibleRect.toRect() != newVisibleRect.toRect()) {
+            //qDebug() << "ListItemCache: caching" << m_visibleRect
+            //    << "->" << newVisibleRect;
+
+            pixmap = QPixmap(sourceBoundingRect().toRect().size());
+            pixmap.fill(Qt::transparent);
+
+            QPainter pixmapPainter(&pixmap);
+            drawSource(&pixmapPainter);
+            pixmapPainter.end();
+            m_cacheKey = QPixmapCache::insert(pixmap);
+
+            m_visibleRect = newVisibleRect;
+        }
+
+        //qDebug() << "ListItemCache: blitting" << m_visibleRect;
+        painter->drawPixmap(0, 0, pixmap);
+    } 
+}
+
+void ListItemCache::sourceChanged(ChangeFlags)
+{
+    QPixmapCache::remove(m_cacheKey);
+}
+
+
+