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关于嵌入式编程的tcl语法的资料

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<td bgcolor="ffffff" width="15">&nbsp;</td><td bgcolor="ffffff" align="left" valign="top" cellspacing="0" cellpadding="0"><img alt="" src="images/tkhello.jpg"></td><td bgcolor="ffffff" width="12">&nbsp;</td><td valign="top" align="left" bgcolor="ffffff" width="*">
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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>小部件</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 1 页（共7 页）</nobr></font></td>
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<p>Tk 是对 Tcl 的图形工具箱扩展。Tk 发行版与 Tcl 的发行版是在一起的。在接下来的几屏中，将回顾 Tk 小部件集，研究一些配置选项并设置一些示例来演示 Tk 的有用性。</p>
<p>很难使任何 PHB（挑剔的老板）相信本教程的这一部分是与工作相关的。毕竟，它是有关小部件的，概念上小部件与&ldquo;玩耍&hellip;&hellip;&rdquo;更接近，但这<i>是</i>工作，所以让我们钻研它。首先，这里是 Tk 增强的&ldquo;Hello, World!&rdquo;代码</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12"> 
#!/usr/bin/wish
#
# Hello World, Tk-style
 
button .hello -text Hello \
  -command {puts stdout \
  "Hello, World!"}
button .goodbye -text Bye! \
  -command {exit}
 
pack .hello -padx 60 -pady 5
pack .goodbye -padx 60 -pady 5
			</code>
</pre>
<p>在第一行中调用 <i>wish</i>（Tk 外壳）会产生缺省大小的窗口小部件。然后，定义了两个按钮小部件 <i>.hello</i> 和 <i>.goodbye</i> — 它们被放进窗口中，该窗口收缩至由指定按钮间距定义的大小。执行该脚本时，在左边会显示一个对话框。单击 <i>
							<b>Hello</b>
						</i> 按钮，在父终端窗口中得到&ldquo;Hello, World!&rdquo;输出，单击 <i>
							<b>Bye!</b>
						</i> 以终止脚本。</p>
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