xyplot.cpp

图形绘制算法实现、区域填充算法的实现过程、图形裁减算法的实现等

// XYPlot.cpp: implementation of the CXYPlot class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "CreatePen.h"
#include "XYPlot.h"

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

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

CXYPlot::CXYPlot()
{

}

CXYPlot::~CXYPlot()
{

}

void CXYPlot::SetCoordinationRC(CRect& rect)
{
	m_CoordinateRc.left = rect.left + 50;
	m_CoordinateRc.bottom = rect.bottom - 50;
	m_CoordinateRc.right = rect.right - 100;
	m_CoordinateRc.top = rect.top + 50;
}
void CXYPlot::DrawCoordination(CDC* pDC)
{
	//画x,y坐标轴
	pDC->MoveTo(m_CoordinateRc.left, m_CoordinateRc.bottom);
	pDC->LineTo(m_CoordinateRc.right, m_CoordinateRc.bottom);  //x轴
	pDC->MoveTo(m_CoordinateRc.left, m_CoordinateRc.bottom);
	pDC->LineTo(m_CoordinateRc.left, m_CoordinateRc.top);  //y轴
	//画x轴上的箭头
	pDC->MoveTo(m_CoordinateRc.right, m_CoordinateRc.bottom);
	pDC->LineTo(m_CoordinateRc.right - 14, m_CoordinateRc.bottom - 3);
	pDC->MoveTo(m_CoordinateRc.right, m_CoordinateRc.bottom);
	pDC->LineTo(m_CoordinateRc.right - 14, m_CoordinateRc.bottom + 3);
	//画y轴上的箭头
	pDC->MoveTo(m_CoordinateRc.left, m_CoordinateRc.top);
	pDC->LineTo(m_CoordinateRc.left - 3, m_CoordinateRc.top + 14);
	pDC->MoveTo(m_CoordinateRc.left, m_CoordinateRc.top);
	pDC->LineTo(m_CoordinateRc.left + 3, m_CoordinateRc.top + 14);
	
	//画x轴刻度
	int i = 0, j;
	CString str;
	while(i< (m_CoordinateRc.right - 50)){
		str.Format("%d", i);
		pDC->MoveTo(m_CoordinateRc.left + i, m_CoordinateRc.bottom);
		pDC->LineTo(m_CoordinateRc.left + i, m_CoordinateRc.bottom - 10);
		pDC->TextOut(m_CoordinateRc.left + i - 10, m_CoordinateRc.bottom + 10, str);
		j = 0;
		for(j= 0; j< 50;){
			if((i+50) > (m_CoordinateRc.right - 50))
				break;
			j += 5;
			pDC->MoveTo(m_CoordinateRc.left + i + j, m_CoordinateRc.bottom);
			pDC->LineTo(m_CoordinateRc.left + i + j, m_CoordinateRc.bottom - 5);
		}
		i += 50 ;
	}
	//画y轴刻度
	BOOL bFirst = TRUE;
	//i = m_CoordinateRc.top + 14;
	i = m_CoordinateRc.bottom ;
	int scale = 0;
	while(i > (m_CoordinateRc.top + 14)){
		str.Format("%d", scale);
		pDC->MoveTo(m_CoordinateRc.left, i) ;
		pDC->LineTo(m_CoordinateRc.left + 10, i);
		pDC->TextOut(m_CoordinateRc.left - 50, i - 6, str);
		j = 0;
		for(j= 0; j< 50;){
			if((i - 50) < (m_CoordinateRc.top + 14))
				break;
			j += 5;
			pDC->MoveTo(m_CoordinateRc.left, i - j);
			pDC->LineTo(m_CoordinateRc.left + 5, i - j);
		}
		scale += 50;
		i -= 50 ;
	}

}