📄 基于visual c++的gdi常用坐标系统及应用 (5).htm
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<H1>基于Visual C++的GDI常用坐标系统及应用 (5)</H1></FONT></TH></TR>
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<TD align=middle height=20>http://www.sina.com.cn
2005年06月20日 11:43 <FONT color=#a20010>天极yesky</FONT></TD></TR>
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<TD class=l17><FONT class=f14 id=zoom><!-- 正文内部文字导航 : begin --><!-- 正文内部文字导航 : end -->
<DIV></DIV>
<DIV><B> 五、实例代码<BR></B> </DIV>
<DIV> 为了灵活使用逻辑坐标系,下面给出了几个例子代码:</DIV>
<P> </P>
<DIV><B> 例1:绘制带箭头的坐标轴</B></DIV>
<P> </P>
<DIV>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1>
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<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> CBrush bgBrush(BLACK_BRUSH);</DIV>
<DIV> dc.SelectObject(bgBrush);</DIV>
<DIV> dc.Rectangle(Recto);</DIV>
<DIV> dc.SetMapMode(MM_ISOTROPIC);</DIV>
<DIV> dc.SetViewportOrg(0, 440);</DIV>
<DIV> dc.SetWindowExt(480, 480);</DIV>
<DIV> dc.SetViewportExt(440, -680);</DIV>
<DIV> CPen PenWhite(PS_SOLID, 1, RGB(255, 255, 255));</DIV>
<DIV> dc.SelectObject(PenWhite);</DIV>
<DIV> dc.MoveTo(21, 20);</DIV>
<DIV> dc.LineTo(21, 75);</DIV>
<DIV> // Up arrow</DIV>
<DIV> dc.MoveTo(16, 75);</DIV>
<DIV> dc.LineTo(21, 90);</DIV>
<DIV> dc.LineTo(26, 75);</DIV>
<DIV> dc.LineTo(16, 75);</DIV>
<DIV> dc.MoveTo(21, 22);</DIV>
<DIV> dc.LineTo(75, 22);</DIV>
<DIV> // Right arrow</DIV>
<DIV> dc.MoveTo(75, 17); </DIV>
<DIV> dc.LineTo(90, 22);</DIV>
<DIV> dc.LineTo(75, 27);</DIV>
<DIV> dc.LineTo(75, 17);</DIV>
<DIV> </DIV>
<DIV> dc.SetBkMode(TRANSPARENT);</DIV>
<DIV> dc.SetTextColor(RGB(255, 255, 255));</DIV>
<DIV> dc.TextOut(16, 114, ’Y’);</DIV>
<DIV> dc.TextOut(100, 32, ’X’);</DIV>
<DIV> dc.Rectangle(15, 15, 30, 30);</DIV>
<DIV>}</DIV></TD></TR></TBODY></TABLE><BR></DIV>
<P>
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<DIV align=center><B><IMG alt=基于VisualC++的GDI常用坐标系统及应用(5)
src="基于Visual C++的GDI常用坐标系统及应用 (5).files/3177472958.gif"
border=1><BR>图二十二、代码效果图</B> </DIV></TD></TR></TBODY></TABLE> </P>
<DIV></DIV>
<P> <B>例2</B><B>:绘制<A class=akey
href="http://tech.sina.com.cn/other/2004-07-23/1443392332.shtml"
target=_blank>网格</A></B> <BR><BR></P>
<DIV>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1>
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<TR>
<TD>
<DIV>void CExoDraw1View::OnPaint() </DIV>
<DIV>{</DIV>
<DIV> CPaintDC dc(this); // device context for painting</DIV>
<DIV> CRect Recto;</DIV>
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