用MFC绘制实时坐标图

Question

想要用MFC做一个实时显示网络流量的坐标图。
想问下应该用什么组件绘制呢？
最好能给出点小小的代码示例，谢谢～

Answer 1

一般直接在对话框上绘制就可以了啊
用CDC的MoveTo,LineTo等函数就可以了，在OnPaint里面绘制

Answer 2

dialog 里面OnPaint()
void CYourDlg::OnPaint() 
{
   CPaintDC dc(this); 
   dc.MoveTo(x1，y1）;//起始
   dc.MoveTo(x2，y2）;//终点
   ------------//后面就类似了
}

Answer 3

//此处CPaintDC dc(this);中的dc是对话框的，而不是CStatic的，所以需要获得对话框上的picture的窗口句柄。
CDC* dc;

CRect rect;
GetDlgItem(IDC_GLBSTDDZTN)->GetWindowRect(&rect);//GetWindowRect    screen coordinates 
dc=GetDlgItem(IDC_GLBSTDDZTN)->GetDC();//获得对话框上的picture的窗口句柄

UpdateData();//传递数据
CPen* oldpen;
CPen gridpen(PS_DASH,1,RGB(0,0,255));//网格笔
CPen pen(m_PenStyle,m_PenWidth, m_PenColor);//实线笔
oldpen=dc->SelectObject(&pen);

ScreenToClient(&rect);//把屏幕坐标转换为工作区坐标

CString labelX,labelY;

dc->SetBkMode(TRANSPARENT);//设置透明背景
dc->SetMapMode(MM_ISOTROPIC);
dc->SetMapMode(MM_LOENGLISH);
dc->SetViewportOrg(rect.left-m_blankleft,rect.bottom-m_blankbottom);//只更改坐标原点，不更改坐标轴方向和坐标单位，坐标单位是像素
dc->SetWindowExt(10,280);//用来计算老的或默认的坐标系中一个单位的长度，对应着“窗口”
dc->SetViewportExt(4400,-6800);//规定水平及垂直坐标轴的单位，对应着“视口” //已经进行过坐标转换，坐标原点为左下角
//绘制X轴
dc->MoveTo(rect.left+m_blankleft,0);//坐标原点
dc->LineTo(rect.right-m_blankright,0);
//绘制X轴箭头
dc->LineTo(rect.right-m_blankright-20,10);
dc->MoveTo(rect.right-m_blankright,0);
dc->LineTo(rect.right-m_blankright-20,-10);

//绘制Y轴
dc->MoveTo(rect.left+m_blankleft,0);//坐标原点
dc->LineTo(rect.left+m_blankleft,rect.Height()-m_blankbottom-m_blanktop-10);
//绘制Y轴箭头
dc->MoveTo(rect.left+m_blankleft,rect.Height()-m_blankbottom-m_blanktop-10);
dc->LineTo(rect.left+m_blankleft-10,rect.Height()-m_blankbottom-m_blanktop-30);
dc->MoveTo(rect.left+m_blankleft,rect.Height()-m_blankbottom-m_blanktop-10);
dc->LineTo(rect.left+m_blankleft+10,rect.Height()-m_blankbottom-m_blanktop-30);
dc->SelectObject(&oldpen);
dc->SelectObject(&gridpen);

//绘制X轴网格，纵线 绘制方向为从下至上，从左至右

m_GridStepX=(rect.Width()-m_blankleft-m_blankright)/m_GridCountX;
for (int i=1;i<m_GridCountX;i++)
{
labelX.Format("%5.2f",i*m_GridStepX);
dc->MoveTo(rect.left+m_blankleft+i*m_GridStepX,0);//纵线底部
dc->LineTo(rect.left+m_blankleft+i*m_GridStepX,rect.Height()-m_blankbottom-m_blanktop);//纵线顶部
dc->TextOut(rect.left+m_blankleft+i*m_GridStepX-20,-10,labelX);//X轴标签
}

//绘制Y轴网格，横线 绘制方向为从左至右，从上至下
//坐标X向右为正,Y向上为正
m_GridStepY=(rect.Height()-m_blanktop-m_blankbottom)/m_GridCountY;
for (int j=1;j<m_GridCountY;j++)
{
labelY.Format("%5.2f",(m_GridCountY-j)*m_GridStepY);
dc->MoveTo(rect.left+m_blankleft,rect.Height()-m_blanktop-m_blankbottom-j*m_GridStepY);
dc->LineTo(rect.Width()-m_blankright,rect.Height()-m_blanktop-m_blankbottom-j*m_GridStepY);
dc->TextOut(rect.left-10,rect.Height()-m_blanktop-m_blankbottom-j*m_GridStepY,labelY);//Y轴标签
}
dc->SelectObject(&oldpen);

CFont font1;
font1.CreateFont(35,6,0,0,FW_REGULAR,FALSE,FALSE,0,ANSI_CHARSET,OUT_STROKE_PRECIS,CLIP_DEFAULT_PRECIS,PROOF_QUALITY,FIXED_PITCH | FF_SWISS,"Arial");
CFont* def_font1=dc->SelectObject(&font1);
dc->SelectObject(def_font1);
const double PI=3.141592653589793238462643383279;
for (double k=0;k<500;k+=0.01)//k+=0.01
{
double j=rect.Height()/2+sin(PI/m_GridCountX+k)*m_GridCountY;
dc->SetPixel(rect.left+m_blankleft+k,j,RGB(255,0,0));
}
ReleaseDC(dc);