c++ 绘制坐标（支持象限和刻度）

【实例简介】

绘制坐标，带有刻度并且可以根据需求设置所在 象限内容

【实例截图】

【核心代码】

// 坐标View.cpp : implementation of the CMyView class
//

#include "stdafx.h"
#include "坐标.h"

#include "坐标Doc.h"
#include "坐标View.h"
#include "Setting.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMyView

IMPLEMENT_DYNCREATE(CMyView, CView)

BEGIN_MESSAGE_MAP(CMyView, CView)
	//{{AFX_MSG_MAP(CMyView)
	ON_COMMAND(ID_PLANFIY, OnPlanfiy)
	ON_COMMAND(ID_REV, OnRev)
	ON_COMMAND(ID_SEVEA, OnSevea)
	ON_COMMAND(ID_REGION, OnRegion)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyView construction/destruction

CMyView::CMyView()
{
	// TODO: add construction code here
    m_Button=0;
	m_region=160;

}

CMyView::~CMyView()
{
}

BOOL CMyView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyView drawing

void CMyView::OnDraw(CDC* pDC)
{
	CMyDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
CRect rect;
GetClientRect(&rect);//首先获得视图的区域

 

//下面开始画坐标系的x轴和y轴

pDC->MoveTo(rect.left 100,rect.bottom-100);
pDC->LineTo(rect.right-100,rect.bottom-100);
pDC->MoveTo(rect.left 100,rect.bottom-100);
pDC->LineTo(rect.left 100,rect.top 100);

 

//下面画x轴和y轴上的短线

int xlen=rect.right-rect.left-200;
int ylen=rect.top-rect.bottom 200;//这里ylen是个负数

CPoint CurP;//保存当前点的坐标

//下面是画x坐标轴上的短线

//画前要保证当前点在坐标原点

CurP.x=rect.left 100;
CurP.y=rect.bottom-100;//使当前原点为原点值
pDC->MoveTo(rect.left 100,rect.bottom-100);

for(int i=0;i<10;i  )
{
  CurP.x =xlen/10;  //将x轴分为10个小段
  pDC->MoveTo(CurP.x,CurP.y);
  pDC->LineTo(CurP.x,CurP.y-5);

}
//下面画y坐标轴上的短线

//首先还是要保证当前点在坐标原点
CurP.x=rect.left 100;
CurP.y=rect.bottom-100;//为当前原点赋值
pDC->MoveTo(rect.left 100,rect.bottom-100);

for(int i=0;i<10;i  )
{
  CurP.y =ylen/10;
  pDC->MoveTo(CurP.x,CurP.y);
  pDC->LineTo(CurP.x 5,CurP.y);
}

//下面画坐标系上面的数字间隔

//还是要保证当前点在坐标原点

CurP.x=rect.left 100;
CurP.y=rect.bottom-100;//为当前原点赋值
pDC->MoveTo(rect.left 100,rect.bottom-100);

int maxX,maxY;//记录x轴和y轴上的最大值，认为最小值是0

int xSeg,ySeg;//记录x轴和y轴上每一段分隔的长度
maxX = m_region;
switch(m_Button) {
case 0: maxY=2000;
	break;
case 1: maxY=100;
	break;
case 2: maxY=4100;
	break;

}
xSeg=maxX/10;
ySeg=maxY/10;

CString Temp;             //存放临时坐标上的数值

pDC->TextOut(rect.left 100-10,rect.bottom-100 5,"0");//画原点O

for(int i=0;i<10;i  )
{
  Temp.Format("%d",xSeg);
  CurP.x =xlen/10;
  xSeg =maxX/10;
  pDC->TextOut(CurP.x,CurP.y 5,Temp);
}

//再次要保证当前点在坐标原点

CurP.x=rect.left 100;
CurP.y=rect.bottom-100;//为当前原点赋值
pDC->MoveTo(rect.left 100,rect.bottom-100);


for(int i=0;i<10;i  )
{
  Temp.Format("%d",ySeg);
  CurP.y =ylen/10;
  ySeg =maxY/10;
  pDC->TextOut(CurP.x-50,CurP.y,Temp);
}
        int x;int y;
	    switch(m_Button) {
	   case 0:
		 
		   x = 25;
		   y = 120; 
		   pDC->TextOut(x, y, "待飞距(km)");
	   break;
	   case 1: 
		   
		   x = 25;
		   y = 120;
		   pDC->TextOut(x, y, "节风门(%)");
       break;
	   case 2:
		   
		   x = 25;
		   y = 120; 
		   pDC->TextOut(x, y, "转速(r/s)");
	   break;
		}	
		x =700;
		y = 430;
		pDC->TextOut(x, y, "时间(ms)");

}

/////////////////////////////////////////////////////////////////////////////
// CMyView printing

BOOL CMyView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CMyView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CMyView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMyView diagnostics

#ifdef _DEBUG
void CMyView::AssertValid() const
{
	CView::AssertValid();
}

void CMyView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMyDoc* CMyView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMyDoc)));
	return (CMyDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMyView message handlers

void CMyView::OnPlanfiy() 
{
	// TODO: Add your command handler code here
	m_Button=0;
	Invalidate();
}

//void CMyView::OnFileSave() 
//{
//	// TODO: Add your command handler code here
//	m_Button=1;
//	Invalidate();
//}

void CMyView::OnRev() 
{
	// TODO: Add your command handler code here
	m_Button=2;
	Invalidate();
}

void CMyView::OnSevea() 
{
	// TODO: Add your command handler code here
	m_Button=1;
	Invalidate();
}

void CMyView::OnRegion() 
{
	// TODO: Add your command handler code here
	CSetting dlg;
	if(IDOK==dlg.DoModal())
	{
		m_region=dlg.m_region;
	}
	Invalidate();
}