www.pudn.com > 基本GIS系统开发.rar > Circle.cpp, change:2005-06-12,size:3110b

// Circle.cpp: implementation of the CCircle class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Draw.h" 
#include "Circle.h" 
//#include "DrawDoc.h" 
#include "Data.h" 
#define pi 3.1415926 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
//extern CGraphPara *p_GraphPara; 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
extern IsRectCross(float minx,float miny,float maxx,float maxy); 
 
CCircle::CCircle(); 
/*float xMinScreen,yMinScreen,xMaxScreen,yMaxScreen; 
 
BOOL IsRectCross(float minx,float miny,float maxx,float maxy); 
BOOL CText::IsRectCross(float minx,float miny,float maxx,float maxy) 
{ 
	if(minx>xMaxScreen||maxx<xMinScreen||miny>yMaxScreen||maxy<yMinScreen) 
		return FALSE;  //如两个矩形不相交 
	else 
		return TRUE; 
}*/ 
void CCircle::Draw(CDC* pDC,int m_DrawMode,int m_DrawModel,short BackColor) 
{ 
	int x,y,r; 
	if(b_Delete) 
	{ 
		return ; 
	} 
	float minx,miny,maxx,maxy; 
	GetRect(&minx,&miny,&maxx,&maxy);//得到边界矩形 
	if(!IsRectCross(minx,miny,maxx,maxy))//如果边界矩形不与屏幕窗口相交 
		return; 
	short LineType=m_LineType; 
	short LineWide=max(1,DLtoVL(m_LineWide)); 
	short ColorPen=m_ColorPen; 
	short ColorBrush=m_ColorBrush; 
	if(m_DrawModel==1) 
	{ 
		if(m_LineType!=2) 
			LineType=2; 
		else 
			LineType++; 
	} 
	else if(m_DrawModel==2) 
	{ 
		ColorPen=BackColor; 
		ColorBrush=BackColor; 
	} 
	CGraphPara m_GraphPara; 
    CGraphPara *p_GraphPara; 
	p_GraphPara=&m_GraphPara; 
	CPen pen(LineType,LineWide,p_GraphPara->GetColor(ColorPen)); 
	CPen* pOldPen=pDC->SelectObject(&pen); 
	CBrush brush(p_GraphPara->GetColor(m_ColorBrush)); 
	CBrush* pOldBrush=pDC->SelectObject(&brush); 
	if(m_DrawMode==0) 
		pDC->SetROP2(R2_COPYPEN); 
	else if(m_DrawMode==1) 
		pDC->SetROP2(R2_NOT); 
	if(!m_bFill) 
		pDC->SelectStockObject(NULL_BRUSH); 
	DPtoVP(m_CircleX,m_CircleY,&x,&y); 
	r=DLtoVL(m_CircleR); 
	pDC->Ellipse(x-r,y-r,x+r,y+r); 
	pDC->SelectObject(pOldPen); 
	pDC->SelectObject(pOldBrush); 
} 
 
void CCircle::CalLong() 
{ 
	m_fLong=m_CircleR*2*pi; 
} 
void CCircle::CalArea() 
{ 
	m_fArea=pi*m_CircleR*m_CircleR; 
} 
void CCircle::GetRect(float* minX,float* minY,float* maxX,float* maxY) 
{ 
	*minX=m_CircleX-m_CircleR; 
	*minY=m_CircleY-m_CircleR; 
	*maxX=m_CircleX+m_CircleR; 
	*maxY=m_CircleY+m_CircleR; 
} 
 
BOOL CCircle::IsPoint(float x,float y,float j1,float blc) 
{ 
	float xx; 
	if(b_Delete) 
		return FALSE; 
	xx=CalDisp(x,y,m_CircleX,m_CircleY); 
	if(!m_bFill) 
	{ 
		if((xx>m_CircleR-j1&&xx<m_CircleR+j1)) 
			return TRUE; 
	} 
	else 
	{ 
		if(xx=m_CircleR) 
			return TRUE; 
	} 
	return FALSE; 
} 
 
void CCircle::Move(float x_Move,float y_Move) 
{ 
	m_CircleX+=x_Move; 
	m_CircleY+=y_Move; 
} 
void CCircle::Rotate(float baseX,float baseY,float angle) 
{ 
	RotatePoint(baseX,baseY,angle,&this->m_CircleX,&this->m_CircleY); 
} 
 
BOOL CCircle::IsFill() 
{ 
	return m_bFill; 
} 
 
 
CCircle::~CCircle() 
{ 
 
}