circle.cpp

通过可执行文件中的菜单“绘图”

#include "stdafx.h"
#include "math.h"

#include "VCad.h"
#include "VCadDoc.h"
#include "VCadView.h"

#include "Entity.h"

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

//////////////////////////
//	CLASS	CCircle

IMPLEMENT_SERIAL(CCircle, CEntity, 0)

CCircle::CCircle()
{
	Init();
}

CCircle::CCircle(const CCircle& circle)
	: CEntity(circle)
{
	m_center = circle.m_center ;
	m_dRadius = circle.m_dRadius ;
}
CCircle::CCircle(const Position& center,const double& radius)
{
	Init();
	m_center = center ;
	m_dRadius = radius ;
}
CCircle::CCircle(const Position& center,const Position& around)
{
	Init();
	m_center = center ;

	m_dRadius = m_center.Distance(around) ;
}

CCircle::~CCircle()
{
}

CEntity*	CCircle::Copy()
{
	CCircle*	pEntity = new CCircle(m_center, m_dRadius);
	return pEntity;
}

void CCircle::Init()
{
	CEntity::Init();
	m_type = etCircle;
	m_center.Init();
	m_dRadius = 0 ;
}

int	CCircle::GetType()
{
	return etCircle;
}

Position CCircle::GetCenterPos()
{
	return m_center;
}

double CCircle::GetRadius()
{
	return m_dRadius;
}
///////////
///////////////

void CCircle::Draw(CDC * pDC, int drawMode /* = dmNormal */)
{
	// 得到圆的外接矩形框
	Position ltpos(m_center.x - m_dRadius, m_center.y + m_dRadius ) ;
	Position rbpos(m_center.x + m_dRadius, m_center.y - m_dRadius ) ;
	// 屏幕坐标的外接矩形框的两个角点和圆心点
	CPoint ssp, sep, scenp;
	// 将世界坐标转化为屏幕坐标
	g_pView->WorldtoScreen(ltpos,ssp) ;
	g_pView->WorldtoScreen(rbpos,sep) ;
	g_pView->WorldtoScreen(m_center, scenp) ;	
	// 得到原来的绘图模式
	int		n = GetROP2(pDC->GetSafeHdc());
	// 创建画笔的原则：
	// 如果在正常的绘图模式下，使用成员变量创建画笔
	// 如果是其它的模式,使用全局函数"SetDrawEnvir"创建画笔
	CPen	pen; 
	if( drawMode == dmNormal ) 
		pen.CreatePen(m_lineStyle,m_lineWidth,m_color) ;
	else
		::SetDrawEnvir(pDC, drawMode, &pen);
	// 得到原来的画笔
	CPen* pOldPen = pDC->SelectObject(&pen) ;
	pDC->SetMapMode(MM_LOENGLISH); 
	pDC->SelectStockObject(NULL_BRUSH) ;
	// 根据屏幕坐标绘制图元
	pDC->Ellipse(ssp.x, ssp.y, sep.x, sep.y) ;
	// 恢复原来的画笔 
	pDC->SelectObject(pOldPen) ;
	// 恢复原来的绘图模式
	pDC->SetROP2(n);
}
void CCircle::Serialize(CArchive& ar) 
{
	CEntity::Serialize(ar);
	m_center.Serialize(ar);
	if(ar.IsStoring())
		ar<<m_dRadius ;
	else
		ar>>m_dRadius ;
}