VC 画坐标图??????
在对话框的一个待定区域来画xy坐标图，画图的面积已经确定了，但是每一次输入的x和y都不一样，
怎么样来画坐标图，能够让整个图形看起来比较合理呢？

比如说，当输入的数为1-10时，坐标显示为1、2、3...
当输入的数为0.1-1时，坐标显示为0.1、0.2、0.3...
当输入的数为10-100时，坐标显示为10、20、30...

到底怎样处理会比较合适呢？


[解决办法]
你自己规定最大值和最小值，显示个数。用(最大值-最小值)/个数，就可以知道一个刻度是多少，然后自己画图
[解决办法]
lz所说的合理是什么意思？
[解决办法]
size = (y - x) / 10

x + size x + 2 * size ........ x + size * size
[解决办法]
归一化一下。
[解决办法]
又是一个坐标的问题
看来我真的有必要整理一个画坐标的例子上传了
先拿个函数出来救救急吧
希望对你有帮助

C/C++ code

void DrawCoordinate(CDC* pDC, CRect rectCoord){    CString    strCoord;    CRect    rectTemp;    int        i, nSection, nOffset;    CBrush    brushFrame;    CSize    szText;    brushFrame.CreateSolidBrush(m_clrFrame);    pDC->FillSolidRect(rectCoord, m_clrCoordBkg);    nOffset    = 2;    for(i=0; i<=m_nDivisionX; i++)    {        strCoord.Format("%d", m_nRangX*i/m_nDivisionX);        nSection    = rectCoord.Width()*i/m_nDivisionX;        szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());        rectTemp.SetRect(rectCoord.left+nSection-szText.cx/2, rectCoord.bottom+nOffset, rectCoord.left+nSection+szText.cx/2, rectCoord.bottom+szText.cy+nOffset);        pDC->MoveTo(rectCoord.left+nSection, rectCoord.top);        pDC->LineTo(rectCoord.left+nSection, rectCoord.bottom);        pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_CENTER);    }    nOffset    = 2;    for(i=0; i<=m_nDivisionY; i++)    {        strCoord.Format("%d", m_nRangY*i/m_nDivisionY);        nSection    = rectCoord.Height()*i/m_nDivisionY;        szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());        rectTemp.SetRect(rectCoord.left-szText.cx-nOffset, rectCoord.bottom-nSection-szText.cy/2, rectCoord.left-nOffset, rectCoord.bottom-nSection+szText.cy/2);        pDC->MoveTo(rectCoord.left, rectCoord.top+nSection);        pDC->LineTo(rectCoord.right+1, rectCoord.top+nSection);        pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_RIGHT);    }    nOffset    = 4;    if(!m_bIsShowGrid)    {        rectTemp.SetRect(rectCoord.left+nOffset, rectCoord.top+1, rectCoord.right, rectCoord.bottom-nOffset);        pDC->FillSolidRect(rectTemp, m_clrCoordBkg);    }}
[解决办法]
void DrawCoordinate(CDC* pDC, CRect rectCoord)
{
   CString    strCoord;
   CRect    rectTemp;
   int        i, nSection, nOffset;
   CBrush    brushFrame;
   CSize    szText;

   brushFrame.CreateSolidBrush(m_clrFrame);
   pDC->FillSolidRect(rectCoord, m_clrCoordBkg);
   nOffset    = 2;
   for(i=0; i<=m_nDivisionX; i++)
   {
       strCoord.Format("%d", m_nRangX*i/m_nDivisionX);

       nSection    = rectCoord.Width()*i/m_nDivisionX;
       szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());

       rectTemp.SetRect(rectCoord.left+nSection-szText.cx/2, rectCoord.bottom+nOffset, rectCoord.left+nSection+szText.cx/2, rectCoord.bottom+szText.cy+nOffset);
       pDC->MoveTo(rectCoord.left+nSection, rectCoord.top);
       pDC->LineTo(rectCoord.left+nSection, rectCoord.bottom);
       pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_CENTER);
   }

   nOffset    = 2; 
 
   for(i=0; i<=m_nDivisionY; i++)
   {
       strCoord.Format("%d", m_nRangY*i/m_nDivisionY);

       nSection    = rectCoord.Height()*i/m_nDivisionY;
       szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());

       rectTemp.SetRect(rectCoord.left-szText.cx-nOffset, rectCoord.bottom-nSection-szText.cy/2, rectCoord.left-nOffset, rectCoord.bottom-nSection+szText.cy/2);
       pDC->MoveTo(rectCoord.left, rectCoord.top+nSection);
       pDC->LineTo(rectCoord.right+1, rectCoord.top+nSection);
       pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_RIGHT);
   }

   nOffset    = 4;
   if(!m_bIsShowGrid)
   {
       rectTemp.SetRect(rectCoord.left+nOffset, rectCoord.top+1, rectCoord.right, rectCoord.bottom-nOffset);
       pDC->FillSolidRect(rectTemp, m_clrCoordBkg);
   }
}
[解决办法]
希望这个函数对你有帮助
void DrawCoordinate(CDC* pDC, CRect rectCoord)
{
    CString    strCoord;
    CRect    rectTemp;
    int        i, nSection, nOffset;
    CBrush    brushFrame;
    CSize    szText;

    brushFrame.CreateSolidBrush(m_clrFrame);
    pDC->FillSolidRect(rectCoord, m_clrCoordBkg);
    nOffset    = 2;
    for(i=0; i<=m_nDivisionX; i++)
    {
        strCoord.Format("%d", m_nRangX*i/m_nDivisionX);

        nSection    = rectCoord.Width()*i/m_nDivisionX;
        szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());

        rectTemp.SetRect(rectCoord.left+nSection-szText.cx/2, rectCoord.bottom+nOffset, rectCoord.left+nSection+szText.cx/2, rectCoord.bottom+szText.cy+nOffset);
        pDC->MoveTo(rectCoord.left+nSection, rectCoord.top);
        pDC->LineTo(rectCoord.left+nSection, rectCoord.bottom);
        pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_CENTER);
    }

    nOffset    = 2;
    for(i=0; i<=m_nDivisionY; i++)
    {
        strCoord.Format("%d", m_nRangY*i/m_nDivisionY);

        nSection    = rectCoord.Height()*i/m_nDivisionY;
        szText        = pDC->GetTextExtent(strCoord, strCoord.GetLength());

        rectTemp.SetRect(rectCoord.left-szText.cx-nOffset, rectCoord.bottom-nSection-szText.cy/2, rectCoord.left-nOffset, rectCoord.bottom-nSection+szText.cy/2);
        pDC->MoveTo(rectCoord.left, rectCoord.top+nSection);
        pDC->LineTo(rectCoord.right+1, rectCoord.top+nSection);
        pDC->DrawText(strCoord, strCoord.GetLength(), rectTemp, DT_RIGHT);
    }

    nOffset    = 4;
    if(!m_bIsShowGrid)
    {
        rectTemp.SetRect(rectCoord.left+nOffset, rectCoord.top+1, rectCoord.right, rectCoord.bottom-nOffset);
        pDC->FillSolidRect(rectTemp, m_clrCoordBkg);
    }
}