Делегаты на C++ | страница 6



Окончательная версия делегата, обобщённая с помощью всех этих макросов, будет выглядеть так:

>template‹class TRet TEMPLATE_PARAMS›

>class I_DELEGATE {

>public:

> virtual ~I_DELEGATE() {}

> virtual TRet Invoke(PARAMS) = 0;

> virtual bool Compare(I_DELEGATE‹TRet TEMPLATE_ARGS›* pDelegate) = 0;

>};


>template‹class TRet TEMPLATE_PARAMS›

>class C_STATIC_DELEGATE: public I_DELEGATE‹TRet TEMPLATE_ARGS› {

>public:

> typedef TRet (*PFunc)(PARAMS);

> C_STATIC_DELEGATE(PFunc pFunc) { m_pFunc = pFunc; }

> virtual TRet Invoke(PARAMS) { return m_pFunc(ARGS); }

> virtual bool Compare(I_DELEGATE‹TRet TEMPLATE_ARGS›* pDelegate) {

>  C_STATIC_DELEGATE‹TRet TEMPLATE_ARGS›* pStaticDel = dynamic_cast‹C_STATIC_DELEGATE‹TRet TEMPLATE_ARGS›*›(pDelegate);

>  if (pStaticDel == NULL || pStaticDel-›m_pFunc != m_pFunc) return false;

>  return true;

> }

>private:

> PFunc m_pFunc;

>};


>template‹class TObj, class TRet TEMPLATE_PARAMS›

>class C_METHOD_DELEGATE: public I_DELEGATE‹TRet TEMPLATE_ARGS› {

>public:

> typedef TRet (TObj::*PMethod)(PARAMS);

> C_METHOD_DELEGATE(TObj* pObj, PMethod pMethod) {

>  m_pObj = pObj;

>  m_pMethod = pMethod;

> }

> virtual TRet Invoke(PARAMS) { return (m_pObj-›*m_pMethod)(ARGS); }

> virtual bool Compare(I_DELEGATE‹TRet TEMPLATE_ARGS›* pDelegate) {

>  C_METHOD_DELEGATE‹TObj, TRet TEMPLATE_ARGS›* pMethodDel = dynamic_cast‹C_METHOD_DELEGATE‹TObj, TRet TEMPLATE_ARGS›*›(pDelegate);

>  if (pMethodDel == NULL || pMethodDel-›m_pObj != m_pObj || pMethodDel-›m_pMethod != m_pMethod) { return false; }

>  return true;

> }

>private:

> TObj *m_pObj;

> PMethod m_pMethod;

>};


>template‹class TRet TEMPLATE_PARAMS›

>I_DELEGATE‹TRet TEMPLATE_ARGS›* NewDelegate(TRet (*pFunc)(PARAMS)) {

> return new C_STATIC_DELEGATE‹TRet TEMPLATE_ARGS›(pFunc);

>}


>template ‹class TObj, class TRet TEMPLATE_PARAMS›

>I_DELEGATE‹TRet TEMPLATE_ARGS›* NewDelegate(TObj* pObj, TRet (TObj::*pMethod)(PARAMS)) {

> return new C_METHOD_DELEGATE‹TObj, TRet TEMPLATE_ARGS› (pObj, pMethod);

>}


>template‹class TRet TEMPLATE_PARAMS›

>class C_DELEGATE {

>public:

> typedef I_DELEGATE‹TRet TEMPLATE_ARGS› IDelegate;

> typedef std::list‹IDelegate*› DelegateList;

> C_DELEGATE(IDelegate* pDelegate = NULL) { >Add(pDelegate); }

> ~C_DELEGATE() { RemoveAll(); }

> bool IsNull() { return (m_DelegateList.empty()); }

> C_DELEGATE‹TRet TEMPLATE_ARGS›& operator=(IDelegate* pDelegate) {

>  RemoveAll();

>  Add(pDelegate);

>  return *this;

> }

> C_DELEGATE‹TRet TEMPLATE_ARGS›& operator+=(IDelegate* pDelegate) {

>  Add(pDelegate);

>  return *this;