connect(m_if, SIGNAL(propertyChanged(const QString&, const QVariant&)),
this, SLOT(propertyChanged(const QString&, const QVariant&)));
connect(m_if, SIGNAL(setPropertyFailed(const QString&)),
connect(m_if, SIGNAL(propertyChanged(const QString&, const QVariant&)),
this, SLOT(propertyChanged(const QString&, const QVariant&)));
connect(m_if, SIGNAL(setPropertyFailed(const QString&)),