RTTI

MyGUI 运行时类是通过一系列宏做到的

例如获得运行时类名：template+宏

		#define MYGUI_DECLARE_TYPE_NAME( Type ) \
		public: \
			static const std::string& getClassTypeName() { static std::string type = #Type; return type; } \
			/** Get type name as string */ \
			virtual const std::string& getTypeName() const { return Type::getClassTypeName(); }

typeid

Base

	#define MYGUI_RTTI_BASE( BaseType ) \
		public: \
			typedef BaseType RTTIBase; \
			MYGUI_DECLARE_TYPE_NAME( BaseType ) \
			/** Compare with selected type */ \
			virtual bool isType( const std::type_info& _type) const { return typeid( BaseType ) == _type; } \
			/** Compare with selected type */ \
			template<typename Type> bool isType() const { return isType( typeid( Type )); } \
			/** Try to cast pointer to selected type. \
				@param _throw If true throw exception when casting in wrong type, else return nullptr \
			*/ \
			template<typename Type> Type* castType(bool _throw = true) \
			{ \
				if (this->isType<Type>()) return static_cast<Type*>( this ); \
				MYGUI_ASSERT(!_throw, "Error cast type '" << this->getTypeName() << "' to type '" << Type::getClassTypeName() << "' .") \
				return nullptr; \
			} \
			/** Try to cast pointer to selected type. \
				@param _throw If true throw exception when casting in wrong type, else return nullptr \
			*/ \
			template<typename Type> const Type* castType(bool _throw = true) const \
			{ \
				if (this->isType<Type>()) return static_cast<Type*>( this ); \
				MYGUI_ASSERT(!_throw, "Error cast type '" << this->getTypeName() << "' to type '" << Type::getClassTypeName() << "' .") \
				return nullptr; \
			}

例如 Widget 和 Object 都包含 上类runtime 定义

而

	#define MYGUI_RTTI_DERIVED( DerivedType ) \
		public: \
			MYGUI_DECLARE_TYPE_NAME( DerivedType ) \
			typedef RTTIBase Base; \
			typedef DerivedType RTTIBase; \
			/** Compare with selected type */ \
			virtual bool isType( const std::type_info& _type ) const { return typeid( DerivedType ) == _type || Base::isType( _type ); } \
			/** Compare with selected type */ \
			template<typename Type> bool isType() const { return isType( typeid( DerivedType )); }

定义staticEidt 和 Button