MFC動態建立物件

2021-06-03 02:38:15 字數 1489 閱讀 1824

#define implement_dyncreate(class_name, base_class_name) \


cobject* pascal class_name::createobject() \


\implement_runtimeclass(class_name, base_class_name, 0xffff, \


class_name::createobject)


#define implement_runtimeclass(class_name, base_class_name, wschema, pfnnew, class_init) \


cruntimeclass* pascal class_name::_getbaseclass() \


\afx_comdat const cruntimeclass class_name::class##class_name = ; \


cruntimeclass* pascal class_name::getthisclass() \


\cruntimeclass* class_name::getruntimeclass() const \


#define runtime_class(class_name) ((cruntimeclass*)(&class_name::class##class_name))


struct cruntimeclass


;//class_name::createobject --> pfnnew --> 建立物件的函式指標


//例子


implement_dyncreate(cview1, cformview)


=>


object* pascal cview1::createobject()


pwnd = (cwnd*)pviewclass->createobject();


///declare_dyncreate(cview1)


#define declare_dyncreate(class_name) \


declare_dynamic(class_name) \


static cobject* pascal createobject();


#define declare_dynamic(class_name) \


protected: \


static cruntimeclass* pascal _getbaseclass(); \


public: \


static const afx_data cruntimeclass class##class_name; \


virtual cruntimeclass* getruntimeclass() const; \


cobject* cruntimeclass::createobject()


cobject* pobject = null;


tryend_try


return pobject;


}

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