myobject.cpp

实现撤销和恢复功能得远吗

// MyObject.cpp: implementation of the CMyObject class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "TestUndo.h"
#include "MyObject.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMyObject::CMyObject(CRect rect)
{
	m_rect = rect;
	m_nRef = 0;
}

CMyObject::~CMyObject()
{

}

void CMyObject::Draw( CDC * pDC )
{
	pDC->Rectangle( m_rect );
}

void CMyObject::AddRef( )
{
	m_nRef ++;
}

void CMyObject::Release( )
{
	m_nRef --;

	if( m_nRef == 0 )
		delete this;
}