"How did you get that conversion to work?"
Don''t actually know, but it works
I don''t really understand all the casting operations.
Also these work:
pDesktop->add((Component *)b);
pDesktop->add((Button *)b);
Btw. Here''s my current SmartPointer file. It''s quite similar to the one in gamedev.net article.
class SmartObject{public: int m_refcnt; void addRef() { m_refcnt++; } bool delRef() { return (--m_refcnt <= 0); }public: SmartObject() : m_refcnt(0){} virtual ~SmartObject(){}};template <class T> class SmartPointer{protected: SmartObject *m_ptr; void addRef() { if(m_ptr) m_ptr->addRef(); } void delRef() { if( m_ptr ) { if(m_ptr->delRef()) delete m_ptr; m_ptr=0; } } void assign(SmartObject *ptr) { delRef(); m_ptr = ptr; addRef(); }public: SmartPointer(T *ptr=0) : m_ptr(ptr) { addRef(); } SmartPointer(const SmartPointer& p) :m_ptr(p.m_ptr) { addRef(); } ~SmartPointer() { delRef(); } SmartPointer& operator = ( T* ptr ) { assign(ptr); return *this; } SmartPointer& operator = ( SmartPointer& ptr ) { assign(ptr); return *this; } T& operator * () const { return *((T *)m_ptr); } T* operator -> () const { return (T *)m_ptr; } operator T* () { return (T *)m_ptr; } operator const T* (){ return (T *)m_ptr; } operator bool () { return m_ptr!=0; } bool operator == (T *ptr) { return ptr == m_ptr; } bool operator == (const SmartPointer& ptr) { return ptr.m_ptr == this->m_ptr; } bool operator != (T *ptr) { return ptr != m_ptr; } bool operator != (SmartPointer& ptr) { return ptr.m_ptr != this->m_ptr; }}; 
