⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 windows gdi和gdi+编程实例剖析_8.htm

📁 GDI编程的参考资料
💻 HTM
📖 第 1 页 / 共 3 页
字号:
🔍
123 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<!-- saved from url=(0046)http://tech.bc0436.com/dev/255/2190255_7.shtml -->
<HTML lang=zh-CN xmlns="http://www.w3.org/1999/xhtml"><HEAD><TITLE>Windows GDI和GDI+编程实例剖析</TITLE>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META http-equiv=Content-Language content=zh-CN>
<META content=all name=robots>
<META content="index, follow" name=googlebot>
<META content="MSHTML 6.00.2900.2180" name=GENERATOR>
<META content="天极Yesky | 全球中文IT第一门户" name=author>
<META content="天极Yesky | 全球中文IT第一门户" name=Copyright>
<META content=硬件,软件,数码,游戏,e时代,下载,社区,评测,笔记本; name=keywords><LINK media=all 
href="Windows GDI和GDI+编程实例剖析_8.files/yesky-content-cs.css" type=text/css 
rel=stylesheet></HEAD>
<BODY>
<SCRIPT language=JavaScript>
function sendemail(){ 
OpenWindow = window.open('http://other.chinabyte.com/chinabyte/qin/sendemail-new.shtm?url=/dev/255/2190255.shtml&title=Windows GDI和GDI+编程实例剖析&channel=324','emailwin','toolbar=no,location=no,scrollbars=no,menubar=no,width=462,height=450')
}</SCRIPT>

<DIV class=width>
<DIV class=minwidth>
<DIV class=container><!--头部-->
<DIV class=hidden>yesky内容</DIV>
<SCRIPT language=JavaScript src="" type=text/JavaScript></SCRIPT>
<SPAN id=ad1 style="DISPLAY: none"></SPAN>
<DIV align=center>
<SCRIPT>document.write(navigator.userAgent.indexOf('MSIE')==-1?"<SCRIPT src='http://219.239.88.50:80/adsunion/get/;pl=pl-1-survey2005-column-051118;tp=js;sk=0;ck=0;/?'><\/SCRIPT>":"<IFRAME MARGINHEIGHT=0 MARGINWIDTH=0 FRAMEBORDER=0 BORDER=0 VSPACE=0 WIDTH=760 NORESIZE HEIGHT=90 SCROLLING=NO SRC='http://219.239.88.50:80/adsunion/get/;pl=pl-1-survey2005-column-051118;tp=if;sk=0;ck=0;/?'></IFRAME>");</SCRIPT>
</DIV>
<DIV class=clear1></DIV>
<DIV class=newbox><SPAN id=ad8></SPAN></DIV><!--导航条-->
<DIV class=newbox>
<DIV class=newbgpic>
<DIV class=left>您现在的位置： <A href="http://tech.bc0436.com/">Yesky</A>&gt;<A 
href="http://tech.bc0436.com/soft"> 软件</A>&gt;<A 
href="http://tech.bc0436.com/dev"> 开发者网络</A> </DIV>
<DIV class=right>
<DIV class=space1><SPAN id=ad3></SPAN></DIV></DIV></DIV></DIV>
<DIV class=clear1></DIV><!--结束-->
<DIV class=clear1></DIV><!--文章内容区-->
<DIV class=newbox>
<DIV class=newleft>
<DIV class=newleft1>
<DIV class=newsmallbox>Windows GDI和GDI+编程实例剖析 </DIV>
<DIV class=clear1></DIV>
<DIV class=newsmall1box>
<DIV class=newtitle1>作者： 宋宝华 </DIV>
<DIV class=newtitle2>出处： 天极网 </DIV>
<DIV class=newtitle3>责任编辑： <A title=向本编辑提问 
href="http://comments.yesky.com/t/·&frac12;&Ouml;&Ucirc;/6,324/2190255.shtml">方舟 </A></DIV>
<DIV class=newtitle4>[ 2005-11-11 08:18 ]</DIV></DIV>
<DIV class=clear1></DIV>
<STYLE type=text/css>A.zhy0815button_content {
	BORDER-RIGHT: black 1px solid; PADDING-RIGHT: 8px; BORDER-TOP: white 1px solid; PADDING-LEFT: 8px; FONT-SIZE: 12px; PADDING-BOTTOM: 4px; BORDER-LEFT: white 1px solid; COLOR: #000000; LINE-HEIGHT: 300%; PADDING-TOP: 4px; BORDER-BOTTOM: black 1px solid; FONT-FAMILY: "宋体"; TEXT-ALIGN: center; min-width: 75px
}
A.zhy0815button_content:link {
	COLOR: #000; LINE-HEIGHT: 300%; BACKGROUND-COLOR: #d9d9d9; TEXT-DECORATION: none
}
A.zhy0815button_content:visited {
	COLOR: #000000; LINE-HEIGHT: 300%; BACKGROUND-COLOR: #d9d9d9; TEXT-DECORATION: none
}
A.zhy0815button_content:hover {
	BORDER-LEFT-COLOR: black; BORDER-BOTTOM-COLOR: white; COLOR: #333333; BORDER-TOP-COLOR: black; LINE-HEIGHT: 300%; BACKGROUND-COLOR: #cccccc; TEXT-DECORATION: none; BORDER-RIGHT-COLOR: white
}
A.zhy0815button_content:active {
	COLOR: #000000; LINE-HEIGHT: 300%; BACKGROUND-COLOR: #d9d9d9; TEXT-DECORATION: none
}
</STYLE>

<CENTER><A class=zhy0815button_content title=编辑推荐你阅读 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#1" target=_self>推荐阅读</A> <A 
class=zhy0815button_content title=本栏目的最新更新 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#2" target=_self>最新更新</A> <A 
class=zhy0815button_content title=阅读此文章的读者还看了以下文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#3" target=_self>继续阅读</A> <A 
class=zhy0815button_content title=相关主题的关键字 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#4" target=_self>相关主题</A> <A 
class=zhy0815button_content title=本文编辑方舟的其他文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#5" target=_self>编辑新作</A> <A 
class=zhy0815button_content title=本栏目最近最受欢迎的文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#6" target=_self>阅读排行</A> <A 
class=zhy0815button_content id=comment_url_tag title=读者、编辑互动讨论区 
href="http://comments.yesky.com/t/GDI/6,324/2190255.shtml">讨论本文</A><A 
class=zhy0815button_content id=comment_url_art title=读者、编辑互动讨论区 
href="http://comments.yesky.com/a/6,324/2190255.shtml">讨论本文</A> <A 
class=zhy0815button_content title=本文相关产品和厂商 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#8" target=_self>相关产品</A> 
</CENTER>
<DIV class=space2><SPAN id=ad5></SPAN></DIV><BR>
<DIV class=newmiddlebox style="OVERFLOW: hidden">
<DIV class=guanggao><SPAN id=ad4></SPAN></DIV>
<DIV class=guanggao><SPAN 
id=contentAdv></SPAN></DIV>　　<B>5.GDI与GDI+的比较</B><BR><BR>　　GDI+相对GDI而言主要在编程方式上发生了巨大的改变。<BR><BR>　　GDI的核心是设备上下文，GDI函数都依赖于设备上下文句柄，其编程方式是基于句柄的；GDI+无需时刻依赖于句柄或设备上下文，用户只需创建一个Graphics 
对象，就可以用面向对象的方式调用其成员函数进行图形操作，编程方式是基于对象的。<BR><BR>　　GDI在使用设备上下文绘制线条之前，必须先调用SelectObject 
以使钢笔对象和设备上下文关联。其后，在设备上下文中绘制的所有线条均使用该钢笔，直到选择另一支不同的钢笔为止。CGdiexampleDlg::OnGdiDrawLine函数中的下列语句完成的就是这个功能：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>//创建绘制正旋曲线的pen并将其选入设备上下文<BR>CPen 
      pen(PS_SOLID,1,RGB(255,0,0));<BR>HGDIOBJ oldObject = 
      dc.SelectObject(pen.GetSafeHandle()); 
      <BR>…<BR>//创建绘制x轴的pen并将其选入设备上下文<BR>CPen 
      penx(PS_SOLID,1,RGB(0,0,255));<BR>dc.SelectObject(penx.GetSafeHandle());<BR>…<BR>//恢复原先的pen<BR>dc.SelectObject(oldObject);</TD></TR></TBODY></TABLE><BR>　　但是，在GDI+中，只需将Pen对象直接作为参数传递给Graphics类的DrawLine等方法即可，而不必使Pen对象与Graphics对象关联，例如CGdiexampleDlg::OnGdipDrawLine函数中的下列语句：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>Pen 
      myPen(Color::Red);<BR>myPen.SetWidth(1);<BR>…<BR>graphics.DrawLine(&amp;myPen,i,100*sin(2*(i/(rect.right/5.0))*PI),<BR>i+1,100*sin(2*((i+1)/(rect.right/5.0))*PI));<BR>…<BR>graphics.DrawLine(&amp;myPen,0,0,rect.right,0);</TD></TR></TBODY></TABLE><BR>　　GDI中有当前位置的概念，所以在使用GDI绘制线条前应该先使用MoveTo移动当前位置，再使用LineTo画线，例如：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>//绘制正旋曲线<BR>dc.MoveTo(0,0) ;<BR>for(int 
      i=0;i&lt;rect.right;i++)<BR>{<BR>　dc.LineTo(i,100*sin(2*(i/(rect.right/5.0))*PI)); 
      <BR>} 
</TD></TR></TBODY></TABLE><BR>　　而GDI+中则没有当前位置的概念，画线函数中可以直接指定起点和终点，例如：<BR><BR>
<TABLE borderColor=#cccccc width="90%" align=center bgColor=#e3e3e3 border=1>
  <TBODY>
  <TR>
    <TD>graphics.DrawLine(&amp;myPen,0,0,rect.right,0);</TD></TR></TBODY></TABLE><BR>　　<B>6.结论</B><BR><BR>　　鉴于GDI+良好的易用性和其具有的强大功能，我们建议尽快抛弃GDI编程方式，因为我们没有必要将时间浪费在无意义的重复代码的设计上。GDI+对GDI的增强，某种意义上类似于MFC对Windows 
API的整理和封装。作为一种良好的"生产工具"，它必将大大地促进开发时的"生产力"。<BR><BR>
<TABLE borderColor=#000000 cellSpacing=4 width="90%" align=center border=1>
  <TBODY>
  <TR>
    <TD>
      <DIV align=center>编辑推荐：<A href="http://dev.yesky.com/121/2018121.shtml" 
      target=_blank><FONT 
      color=#cc3333><B>基于VC++的GDI常用坐标系统及应用</B></FONT></A></DIV></TD></TR></TBODY></TABLE>
<DIV class=right>共8页。 <A class=page 
href="http://tech.bc0436.com/dev/255/2190255.shtml" target=_self><FONT 
face=Webdings>9</FONT></A> <A class=page 
href="http://tech.bc0436.com/dev/255/2190255_6.shtml" target=_self><FONT 
face=Webdings>7</FONT></A> <A class=page 
href="http://tech.bc0436.com/dev/255/2190255.shtml" target=_self><B>1</B></A> <A 
class=page href="http://tech.bc0436.com/dev/255/2190255_1.shtml" 
target=_self><B>2</B></A> <A class=page 
href="http://tech.bc0436.com/dev/255/2190255_2.shtml" target=_self><B>3</B></A> 
<A class=page href="http://tech.bc0436.com/dev/255/2190255_3.shtml" 
target=_self><B>4</B></A> <A class=page 
href="http://tech.bc0436.com/dev/255/2190255_4.shtml" target=_self><B>5</B></A> 
<A class=page href="http://tech.bc0436.com/dev/255/2190255_5.shtml" 
target=_self><B>6</B></A> <A class=page 
href="http://tech.bc0436.com/dev/255/2190255_6.shtml" target=_self><B>7</B></A> 
<A class=page href="http://tech.bc0436.com/dev/255/2190255_7.shtml" 
target=_self><FONT color=#666666><B>8</B></FONT></A></DIV></DIV>
<CENTER><A class=zhy0815button_content title=编辑推荐你阅读 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#1" target=_self>推荐阅读</A> <A 
class=zhy0815button_content title=本栏目的最新更新 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#2" target=_self>最新更新</A> <A 
class=zhy0815button_content title=阅读此文章的读者还看了以下文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#3" target=_self>继续阅读</A> <A 
class=zhy0815button_content title=相关主题的关键字 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#4" target=_self>相关主题</A> <A 
class=zhy0815button_content title=本文编辑方舟的其他文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#5" target=_self>编辑新作</A> <A 
class=zhy0815button_content title=本栏目最近最受欢迎的文章 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#6" target=_self>阅读排行</A> <A 
class=zhy0815button_content id=comment_url_tag title=读者、编辑互动讨论区 
href="http://comments.yesky.com/t/GDI/6,324/2190255.shtml">讨论本文</A><A 
class=zhy0815button_content id=comment_url_art title=读者、编辑互动讨论区 
href="http://comments.yesky.com/a/6,324/2190255.shtml">讨论本文</A> <A 
class=zhy0815button_content title=本文相关产品和厂商 
href="http://tech.bc0436.com/dev/255/2190255_7.shtml#8" target=_self>相关产品</A> 
</CENTER><!-- Error -->
<DIV class=clear1></DIV></DIV><!--结束-->
<DIV class=clear1></DIV>
<DIV class=space2><SPAN id=ad7></SPAN></DIV><!--文章评论区-->
<SCRIPT language=JavaScript>
<!--
var aid = 2190255;
var channelid = 324;
var tagname = "GDI";


//-->
</SCRIPT>

<SCRIPT language=JavaScript>
<!--
if(typeof(tagname) == "string" && tagname.length > 0) {
comment_url_art[0].style.display = "none";
comment_url_art[1].style.display = "none";
comment_url_tag[0].style.display = "";
comment_url_tag[1].style.display = "";
} else {
comment_url_art[0].style.display = "";
comment_url_art[1].style.display = "";
comment_url_tag[0].style.display = "none";
comment_url_tag[1].style.display = "none";
}
//-->
</SCRIPT>
<!--结束-->
<DIV class=clear1></DIV>
<DIV class=newxiangguan>
<DIV class=newxiangguanmenu><IMG height=11 
src="Windows GDI和GDI+编程实例剖析_8.files/inverse1-dht.gif" width=22><A 
name=1>推荐阅读：相关文章</A> </DIV>
<DIV class=newxiangguancontent>
<LI><A 
href="http://tech.bc0436.com/387/1937387.shtml">VC++.NET的GDI+入门之位图和图标</A>(2005-04-19 
16:18) 
<LI><A 
href="http://tech.bc0436.com/423/1937423.shtml">VC.NET的GDI+编程入门教程之图形</A>(2005-04-19 
16:09) 
<LI><A 
href="http://tech.bc0436.com/SoftChannel/72348977504190464/20050419/1938104.shtml">基于Visual 
C++.NET的GDI+编程快速入门</A>(2005-04-19 18:28) 
<LI><A href="http://tech.bc0436.com/188/1951188.shtml">基于Windows 
GDI+的几何线条处理</A>(2005-05-20 15:02) 
<LI><A 
href="http://tech.bc0436.com/dev/121/2018121.shtml">基于VC++的GDI常用坐标系统及应用</A>(2005-06-20 
08:59) 
<LI><A 
href="http://tech.bc0436.com/dev/msdn/113/2112113.shtml">利用GDI+的双缓冲技术来提高绘图效率</A>(2005-09-12 
17:01) 
<LI><A 
href="http://tech.bc0436.com/dev/msdn/183/2133683.shtml">托管C++中GDI+和GDI混合编程技术</A>(2005-09-26 
09:16) 
<LI><A 
href="http://tech.bc0436.com/soft/lesson/multimedia/index.shtml">图像与多媒体编程</A>(专题) 
</LI></DIV></DIV>
<DIV class=clear1></DIV><!--相关文章-->
<DIV class=newxiangguan>
<DIV class=newxiangguanmenu><IMG height=11 
src="Windows GDI和GDI+编程实例剖析_8.files/inverse1-dht.gif" width=22>最新热图 </DIV>
123

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -