diff -r 5dc02b23752f -r 3e2da88830cd src/declarative/debugger/qdeclarativedebugtrace.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/declarative/debugger/qdeclarativedebugtrace.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 "qdeclarativedebugtrace_p.h"
+
+#include <QtCore/qdatastream.h>
+#include <QtCore/qurl.h>
+
+Q_GLOBAL_STATIC(QDeclarativeDebugTrace, traceInstance);
+
+QDeclarativeDebugTrace::QDeclarativeDebugTrace()
+: QDeclarativeDebugService(QLatin1String("CanvasFrameRate"))
+{
+    m_timer.start();
+}
+
+void QDeclarativeDebugTrace::addEvent(EventType t)
+{
+    if (QDeclarativeDebugService::isDebuggingEnabled()) 
+        traceInstance()->addEventImpl(t);
+}
+
+void QDeclarativeDebugTrace::startRange(RangeType t)
+{
+    if (QDeclarativeDebugService::isDebuggingEnabled()) 
+        traceInstance()->startRangeImpl(t);
+}
+
+void QDeclarativeDebugTrace::rangeData(RangeType t, const QUrl &url)
+{
+    if (QDeclarativeDebugService::isDebuggingEnabled()) 
+        traceInstance()->rangeDataImpl(t, url);
+}
+
+void QDeclarativeDebugTrace::endRange(RangeType t)
+{
+    if (QDeclarativeDebugService::isDebuggingEnabled()) 
+        traceInstance()->endRangeImpl(t);
+}
+
+void QDeclarativeDebugTrace::addEventImpl(EventType event)
+{
+    if (!isEnabled())
+        return;
+
+    QByteArray data;
+    QDataStream ds(&data, QIODevice::WriteOnly);
+    ds << m_timer.elapsed() << (int)Event << (int)event;
+    sendMessage(data);
+}
+
+void QDeclarativeDebugTrace::startRangeImpl(RangeType range)
+{
+    if (!isEnabled())
+        return;
+
+    QByteArray data;
+    QDataStream ds(&data, QIODevice::WriteOnly);
+    ds << m_timer.elapsed() << (int)RangeStart << (int)range;
+    sendMessage(data);
+}
+
+void QDeclarativeDebugTrace::rangeDataImpl(RangeType range, const QUrl &u)
+{
+    if (!isEnabled())
+        return;
+
+    QByteArray data;
+    QDataStream ds(&data, QIODevice::WriteOnly);
+    ds << m_timer.elapsed() << (int)RangeData << (int)range << (QString)u.toString();
+    sendMessage(data);
+}
+
+void QDeclarativeDebugTrace::endRangeImpl(RangeType range)
+{
+    if (!isEnabled())
+        return;
+
+    QByteArray data;
+    QDataStream ds(&data, QIODevice::WriteOnly);
+    ds << m_timer.elapsed() << (int)RangeEnd << (int)range;
+    sendMessage(data);
+}
+