circle.cpp

mfc例题与练习第二版 例题与练习第二版

// Arc.cpp: implementation of the CCircle class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "exp33_1.h"
#include "circle.h"

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

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

IMPLEMENT_SERIAL(CCircle,CObject,1)

CCircle::CCircle():m_ptCenter(0,0)
{
	m_color = RGB(0,0,0);
	m_nRadius = 0;
}

CCircle::CCircle(int x,int y,int r):m_ptCenter(x,y)
{
	m_nRadius = r;
}

CCircle::~CCircle()
{

}

void CCircle::Serialize(CArchive& ar) 
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
		ar<<m_ptCenter<<m_nRadius<<m_color;
	}
	else
	{
		// TODO: add loading code here
		ar>>m_ptCenter>>m_nRadius>>m_color;
	}
}

void CCircle::Draw(CDC* pDC)
{
	CPen pen(PS_SOLID,0,m_color);
	CPen *oldPen;
	oldPen = pDC->SelectObject(&pen);

	CRect rect(m_ptCenter.x - m_nRadius,m_ptCenter.y - m_nRadius,m_ptCenter.x + m_nRadius,m_ptCenter.y + m_nRadius);
	pDC->Ellipse(&rect);
	pDC->SelectObject(oldPen);
}

void CCircle::Show(CDC* pDC,int y)
{
	TEXTMETRIC tm;
	pDC->GetTextMetrics(&tm);

	int x = 0,l,cx;
	
	cx = tm.tmAveCharWidth;
	pDC->SetTextColor(m_color);
	char st[15],ed[15];
	wsprintf(st,"%d %d",m_ptCenter.x,m_ptCenter.y);
	wsprintf(ed,"%d",m_nRadius);
	
	pDC->TextOut(x,y,"Circle,Center:",l=strlen("Circle,Center:"));
	x +=(l+1)*cx;
	pDC->TextOut(x,y,st,l=strlen(st));
	x += (l+1)*cx;
	pDC->TextOut(x,y," Radius:",l=strlen(" Radius:"));
	x += (l+1)*cx;
	pDC->TextOut(x,y,ed,l=strlen(ed));
}