myrect.cpp

用多态实现的画图小程序

// MyRect.cpp: implementation of the CMyRect class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "lq01.h"
#include "MyRect.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
IMPLEMENT_SERIAL(CMyRect, CShape, 0)
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMyRect::CMyRect()
{

}

CMyRect::~CMyRect()
{

}

void CMyRect::Draw(CDC *pDC, CPoint ptStart, CPoint ptEnd,COLORREF iColor)
{

	CPen lpen(PS_SOLID,1,m_iColor);
	CPen *pOldPen=pDC->SelectObject (&lpen);
//	pDC->Rectangle (CRect(ptStart,ptEnd));
	CPoint C(ptEnd.x,ptStart.y);
	CPoint D(ptStart.x,ptEnd.y);
	pDC->MoveTo (ptStart);
	pDC->LineTo (C);
	pDC->MoveTo (ptStart);
	pDC->LineTo (D);
	pDC->MoveTo (C);
	pDC->LineTo (ptEnd);
	pDC->MoveTo (D);
	pDC->LineTo (ptEnd);
	pDC->SelectObject (pOldPen);

}

CMyRect::CMyRect(CPoint ptStart, CPoint ptEnd,  COLORREF iColor)
{
	m_ptStart=ptStart;
	m_ptEnd=ptEnd;
	m_iColor=iColor;

}