标题:VC 做曲线 换颜色曲线不能显示的问题! 求帮忙!!谢~(问题用红色标注)
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wangbinxsh
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注 册:2010-3-28
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VC 做曲线 换颜色曲线不能显示的问题! 求帮忙!!谢~(问题用红色标注)
CWnd *pWnd=GetDlgItem(IDC_SRC);
    CDC *pDC=pWnd->GetDC();
   
    pDC->Rectangle (0,0,400,300);

    CPen* pPenGray1=new CPen;
    pPenGray1->CreatePen (PS_DASH,1,RGB(128,128,128));//灰(网格 虚线)

    CPen* pPenGray2=new CPen;
    pPenGray2->CreatePen (PS_SOLID,1,RGB(128,128,128));//灰(网格)

    CPen* pPenBlack=new CPen;
    pPenBlack->CreatePen (PS_SOLID,2,RGB(0,0,0));//黑

    CPen* pPenYellow=new CPen;
    pPenYellow->CreatePen (PS_SOLID,2,RGB(250,250,66));//黄

    CPen* pPenRed=new CPen;
    pPenRed->CreatePen (PS_SOLID,1,RGB(240,50,5));//红
   

      CGdiObject* pOldPen=pDC->SelectObject (pPenBlack);//绘制 坐标轴
    pDC->MoveTo (20,10);
    pDC->LineTo (20,280);
    pDC->MoveTo (20,280);
    pDC->LineTo (380,280);

   
    CString sPIText[]={"0","5","10","15","20","25","30"};// 横轴坐标值
   
    for(int i=0;i<7;i++)
    {
        
        pDC->MoveTo(50*i+20,280);
        pDC->LineTo(50*i+20,275);
        pDC->TextOut(50*i+15,282,sPIText[i]);
       // pDC->TextOut(160,300,"前轴制动力");
    }

   CString sPIText1[]={"","5","10","15","20","25"};// 纵轴坐标值
  
   for(int m=0,j=0;m<6;m++,j++)
    {
        
        pDC->MoveTo(20,280-j*50);
        pDC->LineTo(25,280-j*50);
        pDC->TextOut(3,280-j*50,sPIText1[m]);
         //pDC->TextOut(0,120,"@后轴制动力");
    }
   
   pDC->SelectObject (pPenGray1);//绘制网格虚线
   for(i=1;i<7;i++)
    {
        
        pDC->MoveTo(50*i+20,280);
        pDC->LineTo(50*i+20,10);
   
    }

  
     for(j=1;j<6;j++)
    {
        
        pDC->MoveTo(20,280-j*50);
        pDC->LineTo(380,280-j*50);
        
    }

   pDC->SelectObject (pPenGray2);//绘制网格实线

    pDC->MoveTo (20,10);
    pDC->LineTo (380,10);
    pDC->MoveTo (380,10);
    pDC->LineTo (380,280);

    for(i=0;i<36;i++)// 绘制横坐标刻度
    {
        pDC->MoveTo(10*i+20,280);
        pDC->LineTo(10*i+20,275);
    }

    for(j=0;j<28;j++)// 绘制纵坐标刻度
    {
     pDC->MoveTo(20,280-j*10);
    pDC->LineTo(25,280-j*10);

  }

  pDC->SelectObject (pPenYellow);// 为什么这句中将 Yellow 换为 Red  就看不到曲线了??
   for(i=70;i<113;i++)
   {
   y1=280-((i-20)+12.5);
   pDC->MoveTo((int)i,(int)y1);
   pDC->LineTo((int)i,(int)y1);
   }
   for(i=40;i<170;i++)
   {
   y1=280-((i-20)+17.5)/0.85;
   pDC->MoveTo((int)i,(int)y1);
   pDC->LineTo((int)i,(int)y1);
   }
搜索更多相关主题的帖子: 曲线 颜色 标注 
2010-05-28 21:54



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