/**
*	@file		WSubject.h
*	@brief		目标（观察者模式）
*	@author		沙漠乌鸦
*	@time		2010-01-18
*/
#pragma once

#include <vector>

namespace wuya
{

	class WObserver;

	typedef std::vector<WObserver*> ObserverVector;

	class AFX_EXT_CLASS WSubject
	{
	public:
		WSubject(void);
		virtual ~WSubject(void);

		/** @brief 连接Observer */
		virtual void Attach(WObserver* pObserver);

		/** @brief 取消Observer连接 */
		virtual void Detach(WObserver* pObserver);

		/**  
		*	@brief 通知所有Observer进行状态更新  
		*/
		virtual void Notify(ULONGLONG ullTime);

		/**  
		*	@brief 判断是否有观察者观察目标  
		*/  
		BOOL HasObserver();

		/** @brief 更新时是否通知观察者 */
		void SetNotify(BOOL bNotify);
		BOOL GetNotify();

		/** @brief 时间戳 */
		ULONGLONG GetTimeStampSubject() const;
		void SetTimeStampSubject(ULONGLONG ullTime);

	private:
		ObserverVector m_vectorpObserver;

		ULONGLONG m_ullTimeSubject;	///< 时间戳
		BOOL m_bNotify;				///< 是否通知观察者更新
	};

	inline void WSubject::SetNotify(BOOL bNotify)
	{
		this->m_bNotify = bNotify;
	}
	inline BOOL WSubject::GetNotify()
	{
		return m_bNotify;
	}

	inline ULONGLONG WSubject::GetTimeStampSubject() const
	{
		return m_ullTimeSubject;
	}
	inline void WSubject::SetTimeStampSubject(ULONGLONG ullTime)
	{
		this->m_ullTimeSubject = ullTime;
	}

}