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參考了CPPblog上一位同學(xué)的文章原文在這里

基本是照搬了代碼但是不知道是作者沒有在VC71中測(cè)試還是發(fā)出來(lái)的代碼還是有問(wèn)題的我在VC71中編譯還是有點(diǎn)點(diǎn)小小的曲折

下面是我自己根據(jù)VC71修改的!

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class CEvent;
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class CFunImpl
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{
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public:
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CFunImpl() {}
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virtual ~CFunImpl() {}
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virtual void operator()(CEvent& e) = 0;
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virtual bool operator== (const CFunImpl& fun) = 0;
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virtual CFunImpl* Clone() = 0;
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};
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template <typename ClassName>
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class CMemberFunc : public CFunImpl
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{
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public:
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typedef CMemberFunc<ClassName> this_type;
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typedef void (ClassName::*fEventHandler) ( CEvent & e );
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CMemberFunc( ClassName& obj, fEventHandler impl ) : m_Object(obj), m_pImpl(impl) {}
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void operator ()( CEvent & e )
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{
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if ( m_pImpl!=NULL ) (m_Object.*(m_pImpl))( e );
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}
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CFunImpl* Clone()
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{
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return new this_type(m_Object, m_pImpl);
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}
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bool operator== (const CFunImpl& fun)
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{
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if ( typeid(*this) == typeid(fun) )
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{
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const this_type& rFun = dynamic_cast<const this_type& >(fun);
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return (&m_Object == &rFun.m_Object && m_pImpl == rFun.m_pImpl);
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}
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return false;
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}
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virtual ~CMemberFunc()
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{
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}
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protected:
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ClassName& m_Object;
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fEventHandler m_pImpl;
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};
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class CStaticFunc : public CFunImpl
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{
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public:
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typedef void (*fEventHandler) ( CEvent & e );
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CStaticFunc( fEventHandler impl ) : m_pImpl(impl) {}
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void operator ()( CEvent & e )
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{
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if ( m_pImpl!=NULL ) m_pImpl( e );
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}
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CFunImpl* Clone()
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{
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return new CStaticFunc(m_pImpl);
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}
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bool operator== (const CFunImpl& fun)
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{
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if ( typeid(*this) == typeid(fun) )
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{
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const CStaticFunc& rFun = dynamic_cast<const CStaticFunc& >(fun);
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return (m_pImpl == rFun.m_pImpl);
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}
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return false;
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}
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virtual ~CStaticFunc()
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{
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}
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protected:
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fEventHandler m_pImpl;
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};
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class CEventHandler
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{
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private:
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void Clear(){if(m_pImpl){delete m_pImpl ;m_pImpl = NULL ;}}
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CFunImpl* m_pImpl;
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public:
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~CEventHandler()
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{
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Clear();
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}
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template<typename ClassName>
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CEventHandler( ClassName& obj, void (ClassName::*impl)(CEvent&) ) : m_pImpl( new CMemberFunc<ClassName>(obj,impl) ) {}
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CEventHandler( void(*impl)(CEvent&) ) : m_pImpl( new CStaticFunc(impl) ) {}
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CEventHandler( const CEventHandler&fun ) : m_pImpl( NULL ) { *this=fun; }
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void operator() ( CEvent & e )
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{
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(*m_pImpl)(e);
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}
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CEventHandler& operator= ( const CEventHandler& fun )
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{
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Clear();
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if (fun.m_pImpl) m_pImpl = fun.m_pImpl->Clone();
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return *this;
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}
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bool operator== ( const CEventHandler & handler )
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{
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if ( m_pImpl==NULL || handler.m_pImpl==NULL ) return true ;
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if ( typeid(*m_pImpl) == typeid(*(handler.m_pImpl)) )
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{
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return (*m_pImpl) == (*(handler.m_pImpl));
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}
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return false ;
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}
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};
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class CEvent
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{
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private:
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std::list<CEventHandler>m_Funcs;
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void Register( CEventHandler handle )
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{
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m_Funcs.push_back(handle);
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}
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void UnRegister( const CEventHandler & handler )
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{
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m_Funcs.remove(handler);
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}
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void* lpData;
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public:
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void* GetPointer() { return lpData; }
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CEvent & operator<< ( const CEventHandler & handler )
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{
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Register ( handler );
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return * this ;
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}
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CEvent & operator>> ( const CEventHandler & handler )
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{
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UnRegister ( handler );
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return * this ;
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}
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void operator ( )( void* pData=NULL )
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{
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lpData=pData;
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for(std::list<CEventHandler>::iterator pos=m_Funcs.begin(); pos!=m_Funcs.end(); ++pos )
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(*pos)(*this);
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}
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};
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編譯的時(shí)候要打開RTTI!

posted on 2006-09-04 12:27 shaker(太子) 閱讀(536) 評(píng)論(0) 編輯收藏引用所屬分類: C++

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