Q_INTERFACES with classes having a copy constructor

Hi all,

I have a problem which I have no answer for....
I have created a class which is derived from QObject, and does implement an interface. For this class I do have added a copy constructor so that I can use it for Qt's collection classes like QList etc...
The relevant part of the header file does look like this:

Code:

---

class CVO_StreamInfo : public QObject, public IVO_StreamInfoBase
{
    Q_OBJECT
    Q_INTERFACES ( IVO_StreamInfoBase IVO_DataObject );
 
    public:
    CVO_StreamInfo(QObject *parent = 0);
    ~CVO_StreamInfo();
    //
    CVO_StreamInfo(const CVO_StreamInfo& streamInfo);
    CVO_StreamInfo& operator=(const CVO_StreamInfo& streamInfo);
    //
    IVO_DataObject::ObjectVersion objectVersion() const;
    quint32 hash() const;
    //
    ...

---

The class does work perfectly, and the code compiles. However the compiler does throw a warning:
"class IVO_StreamInfoBase should be explicitly initialized in the copy constructor..."

But since the IVO_StreamInfoBase is an interface with all pure virtual methods with no constructor available, what is it that I have to do to get rid of this warning?

Any idea?
The source of the copy constructor method does look like this:

Code:

---

CVO_StreamInfo::CVO_StreamInfo(const CVO_StreamInfo& streamInfo) : QObject(0)
{
    // Make a copy of all properties
    ...

---

Thanks,
Michael