* File Name    :  Command.h

*

* EMail Addr    :  seakingw@163.com

*

* Description : interface for the CCommand class.

*

********************************************************************************/

#ifndef _COMMOND_PATTERNS

#define _COMMOND_PATTERNS

#include <list>

class CCommand;

typedef std::list<CCommand *> CommandList;

typedef CommandList::iterator CommandListIt;

typedef CommandList::reverse_iterator CommandListReIt;

class CCommand

{

public:

virtual ~CCommand();

virtual void Execute() = 0;

virtual void UnExecute() = 0;

protected:

CCommand();

};

template <class Receiver>

class CSimpleCommand:public CCommand

{

public:

typedef void (Receiver::*Action) ();

CSimpleCommand(Receiver* r, Action a):

_receiver(r),_action(a)

{

}

virtual ~CSimpleCommand();

virtual void Execute();

private:

Action _action;

Receiver* _receiver;

};

//myCloass receiver = new MyClass;

//...

//CCommand *aCommand = new CSimpleCommand<MyClass> (receiver ,&MyClass::Action);

//...

//aCommand->Execute();

class CMacroCommand :public CCommand

{

public:

CMacroCommand();

virtual ~CMacroCommand();

virtual void Add(CCommand*);

virtual void Remove(CCommand*);

virtual void Execute();

virtual void UnExecute();

private:

CommandList _comds;

};

#endif

/********************************************************************************

* File Name    :  Command.cpp

*

* EMail Addr    :  seakingw@163.com

*

*

* Description : implementation of the CCommand class.

*

********************************************************************************/

#include "Command.h"

CCommand::CCommand()

{

}

CCommand::~CCommand()

{

}

template <class Receiver>

void CSimpleCommand<Receiver> ::Execute()

{

(_receiver->*_action)();

}

template <class Receiver>

CSimpleCommand<Receiver>::~CSimpleCommand()

{

}

CMacroCommand::CMacroCommand()

{

}

CMacroCommand::~CMacroCommand()

{

}

void CMacroCommand::Execute()

{

CommandListIt it ;

for(it = _comds.begin(); it != _comds.end();it++)

{

  CCommand *pCmd = *it;

  pCmd->Execute();

}

}

void CMacroCommand::UnExecute()

{

CommandListReIt reIt ;

for(reIt = _comds.rbegin(); reIt != _comds.rend();reIt++)

{

  CCommand *pCmd = *reIt;

  pCmd->UnExecute();

}

}

void CMacroCommand::Add(CCommand*pCmd)

{

_comds.push_back(pCmd);

}

void CMacroCommand::Remove(CCommand *pCmd)

{

_comds.remove(pCmd);

}

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