画坐标图及曲线

 void CStartMonitorDlg::OnPaint()

{

       CPaintDC dc(this);

      

       //////////////////////////////////////////////////////////////////////////

       //*******画坐标图*******

       //////////////////////////////////////////////////////////////////////////

       int nxLength=400;

       int nyLength=300;

 

       int nxDivisionNumber = 7;

       int nyDivisionNumber = 6;

 

       int nMeshLength;

 

       CString str;

       int i;

 

       CWnd *pWnd = GetDlgItem(IDC_DIAMETER_TIME_CURVE);

       CDC* pDC = pWnd->GetDC();

       pWnd->Invalidate();

       pWnd->UpdateWindow();

 

       pDC->Rectangle(0,0,nxLength,nyLength);

 

       CPen* pPenRed = new CPen;                                          //创建画笔对象

       pPenRed->CreatePen(PS_SOLID, 1, RGB(255,0,0));  //红色画笔

 

       CPen* pPenGreen = new CPen;                                //创建画笔对象

       pPenGreen->CreatePen(PS_SOLID, 1, RGB(0,255,0));//绿色画笔

 

       CPen* pPenBlue = new CPen;                                  //创建画笔对象

       pPenBlue->CreatePen(PS_DOT, 1, RGB(0,0,255));     //蓝色画笔

 

       CPen* pPenBlack = new CPen;                                 //创建画笔对象

       pPenBlack->CreatePen(PS_SOLID, 1, RGB(0,0,0)); //黑色画笔

 

       //选中黑色画笔，并保存当前画笔

       CGdiObject* pOldPen = pDC->SelectObject(pPenBlack);

       pDC->MoveTo(30,10);                              //绘制坐标轴

       pDC->LineTo(30,nyLength-30);                  //垂直轴

       pDC->LineTo(nxLength-10,nyLength-30);   //水平轴

 

       //横坐标箭头

       pDC->MoveTo(nxLength-10-10,nyLength-30-3);

       pDC->LineTo(nxLength-10,nyLength-30);

       pDC->LineTo(nxLength-10-10,nyLength-30+3);

       pDC->LineTo(nxLength-10-10,nyLength-30-3);

 

       //纵坐标箭头

       pDC->MoveTo(27,20);

       pDC->LineTo(30,10);

       pDC->LineTo(33,20);

       pDC->LineTo(27,20);

 

       //横坐标数字

       nMeshLength = (nxLength-40)/(nxDivisionNumber+1);

       for (i=0; i

              str.Format("%d",i);

              pDC->TextOut(27+i*nMeshLength, nyLength-27, str);

       }

 

       //横坐标标识

       str.Format("时间");

       pDC->TextOut(nxLength-33,nyLength-27,str);

 

       //纵坐标数字

       nMeshLength = (nyLength-40)/(nyDivisionNumber+1);

       for (i=0; i

              str.Format("%d",i*25);

              pDC->TextOut(3, nyLength-40-i*nMeshLength, str);

       }

 

       //纵坐标标识

       str.Format("直径");

       pDC->TextOut(1,3,str);

 

       //网格线

       pDC->SelectObject(pPenBlue);

 

       nMeshLength = (nxLength-40)/(nxDivisionNumber+1);

       for (i=1; i

              pDC->MoveTo(30+i*nMeshLength,nyLength-30);

              pDC->LineTo(30+i*nMeshLength,10);

       }

 

       nMeshLength = (nyLength-40)/(nyDivisionNumber+1);

       for (i=1; i

              pDC->MoveTo(30,nyLength-30-i*nMeshLength);

              pDC->LineTo(nxLength-10,nyLength-30-i*nMeshLength);

       }

 

       //////////////////////////////////////////////////////////////////////////

       //*******画生长曲线图*******

       //////////////////////////////////////////////////////////////////////////

 

 

 

       //恢复以前的画笔

       pDC->SelectObject(pOldPen);

 

       delete pPenRed;

       delete pPenGreen;

       delete pPenBlue;

       delete pPenBlack;

}