www.pudn.com > jtlab.rar > Circle.cpp

#include "stdafx.h" 
//#include "math.h" 
#include "VCad.h" 
#include "VCadView.h" 
#include "Entity.h" 
#include "VCadDoc.h" 
#include "MainFrm.h" 
#include "CreateCmd.h" 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
////////////////////////// 
//	CLASS	CCircle说明于Entity.h中 
 
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 */) 
{ 
	Position ltpos(m_center.x - m_dRadius, m_center.y + m_dRadius ) ; 
	Position rbpos(m_center.x + m_dRadius, m_center.y - m_dRadius ) ; 
	CPoint ssp, sep, scenp; 
 
	g_pView->WorldtoScreen(ltpos,ssp) ; 
	g_pView->WorldtoScreen(rbpos,sep) ; 
	g_pView->WorldtoScreen(m_center, scenp) ;	 
 
	int		n = GetROP2(pDC->GetSafeHdc()); 
	// create a pen by following rules: 
	// if in normal draw mode, create a pen by its member variables  
	// if else, create a pen using global funtion "SetDrawEnvir" 
	CPen	pen;  
	if( drawMode == dmNormal )  
		pen.CreatePen(m_lineStyle,m_lineWidth,m_color) ; 
	else 
		::SetDrawEnvir(pDC, drawMode, &pen); 
 
	CPen* pOldPen = pDC->SelectObject(&pen) ; 
	pDC->SetMapMode(MM_LOENGLISH);  
	pDC->SelectStockObject(NULL_BRUSH) ; 
	//修改点:将自编的圆函数替换这儿的pDC->Ellipse 
	pDC->Ellipse(ssp.x, ssp.y, sep.x, sep.y) ; 
	pDC->SelectObject(pOldPen) ; 
	pDC->SetROP2(n); 
} 
 
void CCircle::Serialize(CArchive& ar)  
{ 
	CEntity::Serialize(ar); 
	m_center.Serialize(ar); 
	if(ar.IsStoring()) 
		ar<>m_dRadius ; 
} 
 
///CLASS	CCreateCircle 说明于CreateCmd.h中 
CCreateCircle::CCreateCircle() 
	: m_center(0,0), m_pos(0,0) 
{ 
	m_nStep = 0; // 初始化操作步为 0	 
} 
 
CCreateCircle::~CCreateCircle() 
{ 
} 
 
int CCreateCircle::GetType() 
{ 
	return ctCreateCircle;  
} 
 
int	CCreateCircle::OnLButtonDown(UINT nFlags, const Position& pos)  
{ 
	m_nStep ++; // 每次单击鼠标左键时操作步加 1  
	switch(m_nStep) // 根据操作步执行相应的操作 
	{ 
		case 1:  
		{ 
			m_center = m_pos = pos; 
			::Prompt("请输入圆周上的任意点："); 
			break; 
		} 
		case 2: 
		{ 
			CDC*	pDC = g_pView->GetDC(); // 得到设备环境指针  
 
			// 擦除在拖动状态时显示的橡皮线 
			CLine*		pTempLine = new CLine(m_center, m_pos); 
			CCircle*	pTempCircle = new CCircle(m_center,m_pos);  
			pTempLine->Draw(pDC, dmDrag); 
			pTempCircle->Draw(pDC, dmDrag); 
			delete pTempLine; 
			delete pTempCircle; 
 
			m_pos = pos; 
						 
			CCircle*	pNewCircle = new CCircle(m_center,m_pos); 
			pNewCircle->Draw(pDC,dmNormal);  
			g_pDoc->m_EntityList.AddTail(pNewCircle);  
			g_pDoc->SetModifiedFlag(TRUE);// set modified flag ; 
 
			g_pView->ReleaseDC(pDC); // 释放设备环境指针 
			 
			m_nStep = 0;  // 将操作步重置为 0 
			::Prompt("请输入圆的中心点：") ; 
			break; 
		} 
		 
	} 
	return 0; 
} 
 
int	CCreateCircle::OnMouseMove(UINT nFlags, const Position& pos) 
{ 
	// 用一静态变量nPreRefresh记录进入OnMouseMove状态时的刷新次数 
	static	int nPreRefresh = g_nRefresh;  
	// 布尔变量bRefresh说明在OnMouseMove过程中视窗是否被刷新 
	BOOL	bRefresh = FALSE;  
	// nCurRefresh用于记录当前的刷新次数 
	int		nCurRefresh = g_nRefresh;  
	// 如果nCurRefresh和nPreRefresh不相等，说明视窗曾被刷新过 
	if(nCurRefresh != nPreRefresh){  
		bRefresh = TRUE; 
		nPreRefresh = nCurRefresh;  
	} 
 
	switch(m_nStep) 
	{ 
		case 0: 
			::Prompt("请输入圆的中心点：") ; 
			break; 
		case 1: 
		{ 
			Position	prePos, curPos; 
			prePos = m_pos; // 获得鼠标所在的前一个位置 
		 
			curPos = pos; 
 
			CDC*	pDC = g_pView->GetDC(); // 得到设备环境指针 
			 
			// 创建临时对象擦除上一次的橡皮线 
			CLine*		pTempLine1 = new CLine(m_center, prePos); 
			CCircle*	pTempCircle1 = new CCircle(m_center, prePos); 
			if(!bRefresh){ // 当视窗没有被刷新时，重画原来的橡皮线使其被擦除 
				pTempLine1->Draw(pDC, dmDrag); 
				pTempCircle1->Draw(pDC, dmDrag); 
			} 
			delete pTempCircle1; 
			delete pTempLine1; 
			// 创建临时对象，根据当前位置绘制橡皮线 
			CLine*		pTempLine2 = new CLine(m_center, curPos); 
			CCircle*	pTempCircle2 = new CCircle(m_center, curPos); 
			pTempLine2->Draw(pDC, dmDrag); 
			pTempCircle2->Draw(pDC, dmDrag); 
			delete pTempCircle2; 
			delete pTempLine2; 
  
			g_pView->ReleaseDC(pDC); // 释放设备环境指针			 
 
			m_pos = curPos; // 将当前位置设置为直线终点，以备下一次鼠标移动时用 
			break; 
		} 
	} 
	return 0; 
} 
// 单击鼠标右键取消当前的操作 
int	CCreateCircle::OnRButtonDown(UINT nFlags, const Position& pos)  
{ 
	// 如果当前的操作步为 1 ，那么要在结束本次操作前擦除上次鼠标移动时绘制的橡皮线 
	if(m_nStep == 1){  
		CDC*	pDC = g_pView->GetDC(); // 得到设备环境指针 
		Position	prePos = m_pos; // 获得鼠标所在的前一个位置 
		CLine*		pTempLine = new CLine(m_center, prePos); 
		CCircle*	pTempCircle = new CCircle(m_center, prePos);  
		pTempLine->Draw(pDC, dmDrag); // 擦除上一次绘制的橡皮线 
		pTempCircle->Draw(pDC, dmDrag);  
		delete pTempCircle; 
		g_pView->ReleaseDC(pDC); // 释放设备环境指针 
	} 
	m_nStep = 0; // 将操作步重置为 0  
	::Prompt("请输入圆的中心点：") ; 
	return 0; 
} 
// 调用Cancel 函数取消本次操作 
int CCreateCircle::Cancel() 
{ 
	// 如果当前的操作步为 1 ，那么要在结束本次操作前擦除上次鼠标移动时绘制的橡皮线 
	if(m_nStep == 1){  
		CDC*	pDC = g_pView->GetDC(); // 得到设备环境指针 
		Position	prePos = m_pos; // 获得鼠标所在的前一个位置 
		CLine*		pTempLine = new CLine(m_center, prePos); 
		CCircle*	pTempCircle = new CCircle(m_center, prePos);  
		pTempLine->Draw(pDC, dmDrag); // 擦除上一次绘制的橡皮线 
		pTempCircle->Draw(pDC, dmDrag);  
		delete pTempCircle; 
		g_pView->ReleaseDC(pDC); // 释放设备环境指针 
	} 
	m_nStep = 0; // 将操作步重置为 0  
	::Prompt("就绪"); // 等待提示新类型的命令操作 
	return 0 ; 
}