- virtual bool Ok() const = 0;
- virtual int GetColoursCount() const { wxFAIL_MSG( _T("not implemented") ); return 0; };
+ virtual bool Ok() const { return IsOk(); }
+ virtual bool IsOk() const = 0;
+ virtual int GetColoursCount() const { wxFAIL_MSG( _T("not implemented") ); return 0; }