--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browsercore/appfw/ThumbnailEngine/TnEngineScaler.cpp	Tue May 04 12:39:35 2010 +0300
@@ -0,0 +1,92 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#include <QTimer>
+#include <QPainter>
+#include "TnEngineScaler.h"
+
+namespace WRT {
+
+TnEngineScaler::TnEngineScaler(MTnEngineScalerCallback& callback)
+: m_callback(&callback)
+{
+    m_resultBitmap = 0;
+}
+
+void TnEngineScaler::init()
+{
+    m_scalingTimer = new QTimer();
+    connect(m_scalingTimer, SIGNAL(timeout()), this, SLOT(run()));
+}
+
+TnEngineScaler* TnEngineScaler::initWithCallback(MTnEngineScalerCallback& callback)
+{
+    TnEngineScaler* self = new TnEngineScaler(callback);
+    self->init();
+    return self;
+}
+
+TnEngineScaler::~TnEngineScaler()
+{
+    cancel();
+    delete m_resultBitmap;
+    delete m_scalingTimer;
+}
+
+void TnEngineScaler::startScaling(QPixmap& source, const QRect& targetRect)
+{
+    // cancel outstanding request
+    cancel();
+    if (!m_resultBitmap || m_resultBitmap->size() != targetRect.size()) {
+        deleteResultBitmap();
+        m_resultBitmap = new QPixmap(targetRect.size());
+    }
+    *m_resultBitmap = source.scaled(targetRect.size(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+    m_targetRect = targetRect;
+    m_scalingTimer->start(20);
+}
+
+void TnEngineScaler::deleteResultBitmap()
+{
+    delete m_resultBitmap;
+    m_resultBitmap = 0;
+}
+
+void TnEngineScaler::cancel()
+{
+    m_scalingTimer->stop();
+    deleteResultBitmap();
+}
+
+void TnEngineScaler::run()
+{
+    m_scalingTimer->stop();
+    m_callback->scalingCompleted(*m_resultBitmap, m_targetRect);
+    // if the callback called StartScalingL(), we must not delete the bitmap
+    if (!isActive()) {
+        deleteResultBitmap();
+    }
+}
+
+bool TnEngineScaler::isActive()
+{
+    return m_scalingTimer->isActive();
+}
+
+}
+