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diff --git a/src/trace/qmlmessagetrace_p.h b/src/trace/qmlmessagetrace_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 Shawn Rutledge
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs UmlQuick project.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifndef QMLMESSAGETRACE_H
+#define QMLMESSAGETRACE_H
+
+#include <QFile>
+#include <QHash>
+#include <QLoggingCategory>
+#include <QRegularExpression>
+
+QT_BEGIN_NAMESPACE
+
+class QmlMessageTrace : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString category READ category WRITE setCategory NOTIFY categoryChanged)
+    Q_PROPERTY(QString outputPrefix READ outputPrefix WRITE setOutputPrefix NOTIFY outputPrefixChanged)
+    Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
+
+public:
+    QmlMessageTrace();
+    ~QmlMessageTrace();
+
+    QString category() const;
+    void setCategory(QString category);
+
+    QString outputPrefix() const { return m_outputPrefix; }
+    void setOutputPrefix(QString outputPrefix);
+
+    bool enabled() const { return m_enabled; }
+    void setEnabled(bool enabled);
+
+signals:
+    void categoryChanged();
+    void outputPrefixChanged();
+    void enabledChanged();
+
+private:
+    static void categoryFilter(QLoggingCategory *cat);
+    static void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &text);
+    void log(QtMsgType type, const QMessageLogContext &context, const QString &rawText);
+    void logBacktrace(QStringList trace);
+    void parseClassAndMethod(const QString &classAndMethod, QString &className, QString &methodName);
+    void addObjectInstance(void *obj, const QString &objClass);
+    void writeObjectInstance(QFile &f, QObject *o);
+    void writeQml();
+
+private:
+    struct Message {
+        double timestamp;
+        QtMsgType type;
+        void *callerPointer;
+        QString callerClass;
+        QString callerMethod;
+        void *calleePointer;
+        QString calleeMethod;
+        QString calleeSignature;
+        QStringList backtrace;
+        QString params;
+        QString toQml() const;
+    };
+
+    static QHash<QByteArray, QList<QmlMessageTrace*> > m_categoryInstances;
+    static QtMessageHandler m_parentMessageHandler;
+
+    static QRegularExpression m_regexObjectFormatted;
+    static QRegularExpression m_regexPointer;
+
+    static int m_refCount;
+
+    QList<Message> m_messages;
+    double m_previousTimestamp;
+
+    QHash<QString, QString> m_tracedObjectsById;
+    QHash<QString, void*> m_recentObjectsByClass;
+    QHash<void*, QObject*> m_objects; // both QObjects and QObjectPrivates have entries here
+
+    bool m_enabled;
+    QByteArray m_category;
+    QString m_outputPrefix;
+};
+
+QT_END_NAMESPACE
+
+#endif // QMLMESSAGETRACE_H