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;
}
C_DELEGATE‹TRet TEMPLATE_ARGS›& operator-=(IDelegate* pDelegate) {
Remove(pDelegate);
return *this;
}
TRet operator()(PARAMS) {
return Invoke(ARGS);
}
private:
void Add(IDelegate* pDelegate) {
if(pDelegate != NULL) m_DelegateList.push_back(pDelegate);
}
void Remove(IDelegate* pDelegate) {
DelegateList::iterator it;
for(it = m_DelegateList.begin(); it!= m_DelegateList.end(); ++it) {
if((*it)-›Compare(pDelegate)) {
delete (*it);
m_DelegateList.erase(it);
break;
}
}
}
void RemoveAll() {
DelegateList::iterator it;
for(it = m_DelegateList.begin(); it!= m_DelegateList.end(); ++it) delete (*it);
m_DelegateList.clear();
}
TRet Invoke(PARAMS) {
DelegateList::const_iterator it;
for (it = m_DelegateList.begin(); it != --m_DelegateList.end(); ++it) (*it)-›Invoke(ARGS);
return m_DelegateList.back()-›Invoke(ARGS);
}
private:
DelegateList m_DelegateList;
};
Вынеся обобщённый таким образом делегат в отдельный файл
// 5 parameters…
#define SUFFIX 5
#define TEMPLATE_PARAMS \
, class TP1, class TP2, class TP3, class TP4, class TP5
