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diff --git a/plugins/qmlprofiler/qmlprofilermodelmanager.cpp b/plugins/qmlprofiler/qmlprofilermodelmanager.cpp
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+++ b/plugins/qmlprofiler/qmlprofilermodelmanager.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "qmlprofilermodelmanager.h"
+#include "qmlprofilersimplemodel.h"
+#include "qmlprofilerprocessedmodel.h"
+#include "qv8profilerdatamodel.h"
+#include "qmlprofilertracefile.h"
+
+#include <utils/qtcassert.h>
+
+#include <QDebug>
+#include <QFile>
+
+namespace QmlProfiler {
+namespace Internal {
+
+
+/////////////////////////////////////////////////////////////////////
+QmlProfilerDataState::QmlProfilerDataState(QmlProfilerModelManager *modelManager, QObject *parent)
+    : QObject(parent), m_state(Empty), m_modelManager(modelManager)
+{
+    connect(this, SIGNAL(error(QString)), m_modelManager, SIGNAL(error(QString)));
+    connect(this, SIGNAL(stateChanged()), m_modelManager, SIGNAL(stateChanged()));
+}
+
+void QmlProfilerDataState::setState(QmlProfilerDataState::State state)
+{
+    // It's not an error, we are continuously calling "AcquiringData" for example
+    if (m_state == state)
+        return;
+
+    switch (state) {
+        case Empty:
+            // if it's not empty, complain but go on
+            QTC_ASSERT(m_modelManager->isEmpty(), /**/);
+        break;
+        case AcquiringData:
+            // we're not supposed to receive new data while processing older data
+            QTC_ASSERT(m_state != ProcessingData, return);
+        break;
+        case ProcessingData:
+            QTC_ASSERT(m_state == AcquiringData, return);
+        break;
+        case Done:
+            QTC_ASSERT(m_state == ProcessingData || m_state == Empty, return);
+        break;
+        default:
+            emit error(tr("Trying to set unknown state in events list"));
+        break;
+    }
+
+    m_state = state;
+    emit stateChanged();
+
+    return;
+}
+
+
+/////////////////////////////////////////////////////////////////////
+QmlProfilerTraceTime::QmlProfilerTraceTime(QObject *parent) : QObject(parent)
+{
+    clear();
+}
+
+QmlProfilerTraceTime::~QmlProfilerTraceTime()
+{
+}
+
+qint64 QmlProfilerTraceTime::startTime() const
+{
+    return m_startTime;
+}
+
+qint64 QmlProfilerTraceTime::endTime() const
+{
+    return m_endTime;
+}
+
+qint64 QmlProfilerTraceTime::duration() const
+{
+    return endTime() - startTime();
+}
+
+void QmlProfilerTraceTime::clear()
+{
+    m_startTime = -1;
+    m_endTime = 0;
+}
+
+void QmlProfilerTraceTime::setStartTime(qint64 time)
+{
+    m_startTime = time;
+}
+
+void QmlProfilerTraceTime::setEndTime(qint64 time)
+{
+    m_endTime = time;
+}
+
+
+/////////////////////////////////////////////////////////////////////
+
+class QmlProfilerModelManager::QmlProfilerModelManagerPrivate
+{
+public:
+    QmlProfilerModelManagerPrivate(QmlProfilerModelManager *qq) : q(qq) {}
+    ~QmlProfilerModelManagerPrivate() {}
+    QmlProfilerModelManager *q;
+
+    QmlProfilerSimpleModel *model;
+    QV8ProfilerDataModel *v8Model;
+    QmlProfilerDataState *dataState;
+    QmlProfilerTraceTime *traceTime;
+
+    // file to load
+    QString fileName;
+};
+
+
+QmlProfilerModelManager::QmlProfilerModelManager(Utils::FileInProjectFinder *finder, QObject *parent) :
+    QObject(parent), d(new QmlProfilerModelManagerPrivate(this))
+{
+    d->model = new QmlProfilerProcessedModel(finder, this);
+    d->v8Model = new QV8ProfilerDataModel(this);
+//    d->model = new QmlProfilerSimpleModel(this);
+    d->dataState = new QmlProfilerDataState(this, this);
+    d->traceTime = new QmlProfilerTraceTime(this);
+}
+
+QmlProfilerModelManager::~QmlProfilerModelManager()
+{
+    delete d;
+}
+
+QmlProfilerTraceTime *QmlProfilerModelManager::traceTime() const
+{
+    return d->traceTime;
+}
+
+// TODO: rename to just "model" or something like that
+QmlProfilerSimpleModel *QmlProfilerModelManager::simpleModel() const
+{
+    return d->model;
+}
+
+QV8ProfilerDataModel *QmlProfilerModelManager::v8Model() const
+{
+    return d->v8Model;
+}
+
+bool QmlProfilerModelManager::isEmpty() const
+{
+    return d->model->isEmpty() && d->v8Model->isEmpty();
+}
+
+int QmlProfilerModelManager::count() const
+{
+    return d->model->count();
+}
+
+void QmlProfilerModelManager::addRangedEvent(int type, int bindingType, qint64 startTime, qint64 length, const QStringList &data, const QmlDebug::QmlEventLocation &location)
+{
+    // If trace start time was not explicitly set, use the first event
+    if (d->traceTime->startTime() == -1)
+        d->traceTime->setStartTime(startTime);
+
+    QTC_ASSERT(state() == QmlProfilerDataState::AcquiringData, /**/);
+    d->model->addRangedEvent(type, bindingType, startTime, length, data, location);
+    emit countChanged();
+}
+
+void QmlProfilerModelManager::addV8Event(int depth, const QString &function, const QString &filename,
+                                         int lineNumber, double totalTime, double selfTime)
+{
+    d->v8Model->addV8Event(depth, function, filename, lineNumber,totalTime, selfTime);
+}
+
+void QmlProfilerModelManager::complete()
+{
+    if (state() == QmlProfilerDataState::AcquiringData) {
+        // If trace end time was not explicitly set, use the last event
+        if (d->traceTime->endTime() == 0)
+            d->traceTime->setEndTime(d->model->lastTimeMark());
+        setState(QmlProfilerDataState::ProcessingData);
+        d->model->complete();
+        d->v8Model->complete();
+        setState(QmlProfilerDataState::Done);
+    } else
+    if (state() == QmlProfilerDataState::Empty) {
+        setState(QmlProfilerDataState::Done);
+    } else
+    if (state() == QmlProfilerDataState::Done) {
+        // repeated Done states are ignored
+    } else {
+        emit error(tr("Unexpected complete signal in data model"));
+    }
+}
+
+void QmlProfilerModelManager::save(const QString &filename)
+{
+    QFile file(filename);
+    if (!file.open(QIODevice::WriteOnly)) {
+        emit error(tr("Could not open %1 for writing.").arg(filename));
+        return;
+    }
+
+    QmlProfilerFileWriter writer;
+
+    writer.setTraceTime(traceTime()->startTime(), traceTime()->endTime(), traceTime()->duration());
+    writer.setV8DataModel(d->v8Model);
+    writer.setQmlEvents(d->model->getEvents());
+    writer.save(&file);
+}
+
+void QmlProfilerModelManager::load(const QString &filename)
+{
+    d->fileName = filename;
+    load();
+}
+
+void QmlProfilerModelManager::setFilename(const QString &filename)
+{
+    d->fileName = filename;
+}
+
+void QmlProfilerModelManager::load()
+{
+    QString filename = d->fileName;
+
+    QFile file(filename);
+
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        emit error(tr("Could not open %1 for reading.").arg(filename));
+        return;
+    }
+
+    // erase current
+    clear();
+
+    setState(QmlProfilerDataState::AcquiringData);
+
+    QmlProfilerFileReader reader;
+    connect(&reader, SIGNAL(error(QString)), this, SIGNAL(error(QString)));
+    connect(&reader, SIGNAL(rangedEvent(int,int,qint64,qint64,QStringList,QmlDebug::QmlEventLocation)), this,
+            SLOT(addRangedEvent(int,int,qint64,qint64,QStringList,QmlDebug::QmlEventLocation)));
+    connect(&reader, SIGNAL(traceStartTime(qint64)), traceTime(), SLOT(setStartTime(qint64)));
+    connect(&reader, SIGNAL(traceEndTime(qint64)), traceTime(), SLOT(setEndTime(qint64)));
+
+    reader.setV8DataModel(d->v8Model);
+    reader.load(&file);
+
+    complete();
+}
+
+void QmlProfilerModelManager::setState(QmlProfilerDataState::State state)
+{
+    d->dataState->setState(state);
+}
+
+QmlProfilerDataState::State QmlProfilerModelManager::state() const
+{
+    return d->dataState->state();
+}
+
+void QmlProfilerModelManager::clear()
+{
+    d->model->clear();
+    d->v8Model->clear();
+    d->traceTime->clear();
+
+    emit countChanged();
+    setState(QmlProfilerDataState::Empty);
+}
+
+void QmlProfilerModelManager::prepareForWriting()
+{
+    setState(QmlProfilerDataState::AcquiringData);
+}
+
+
+}
+}