arduino-0018-windows
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<TITLE>scrolledhtml - Create and manipulate a scrolled text widget with the capability</TITLE>
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<H1>scrolledhtml - Create and manipulate a scrolled text widget with the capability</H1>
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of displaying HTML formatted documents.
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</pre><H2>SYNOPSIS</H2>
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<B>scrolledhtml<I> <I>pathName </I>?<I>options</I>?
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</pre><H2>INHERITANCE</H2>
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itk::Widget <- Labeledwidget <- Scrolledtext <- Scrolledhtml
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</pre><H2>STANDARD OPTIONS</H2>
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>activeBackground</B><br>
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<B>exportSelection</B><br>
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<B>insertBackground</B><br>
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<B>insertWidth</B><br>
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<B>repeatDelay</B><br>
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<B>selectForeground</B><br>
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</td>
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<td valign=top>
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<B>background</B><br>
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<B>foreground</B><br>
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<B>insertBorderWidth</B><br>
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<B>padX</B><br>
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<B>repeatInterval</B><br>
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<B>setGrid</B><br>
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</td>
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<td valign=top>
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<B>borderWidth</B><br>
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<B>highlightColor</B><br>
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<B>insertOffTime</B><br>
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<B>padY</B><br>
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<B>selectBackground</B><br>
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</td>
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<td valign=top>
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<B>cursor</B><br>
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<B>highlightThickness</B><br>
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<B>insertOnTime</B><br>
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<B>relief</B><br>
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<B>selectBorderWidth</B><br>
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</td>
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</table>
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<P>
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See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/options.n.html"> "options" </A> manual entry for details on the standard options.
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</pre><H2>ASSOCIATED OPTIONS</H2>
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>activeRelief</B><br>
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</td>
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<td valign=top>
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<B>elementBorderWidth</B><br>
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</td>
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<td valign=top>
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<B>jump</B><br>
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</td>
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<td valign=top>
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<B>troughColor</B><br>
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</td>
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</table>
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<P>
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See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/scrollbar.n.html"> "scrollbar" </A> widget manual entry for details on the above
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associated options.
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>spacing1</B><br>
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<B>tabs</B><br>
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</td>
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<td valign=top>
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<B>spacing2</B><br>
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<B>wrap</B><br>
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</td>
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<td valign=top>
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<B>spacing3</B><br>
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</td>
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<td valign=top>
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<B>state</B><br>
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</td>
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</table>
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<P>
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See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/text.n.html"> "text" </A> widget manual entry for details on the above
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associated options.
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</pre><H2>INHERITED OPTIONS</H2>
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>labelBitmap</B><br>
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<B>labelPos</B><br>
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<B>hscrollMode</B><br>
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<B>vscrollMode</B><br>
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</td>
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<td valign=top>
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<B>labelFont</B><br>
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<B>labelText</B><br>
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<B>sbWidth</B><br>
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<B>width</B><br>
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</td>
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<td valign=top>
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<B>labelImage</B><br>
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<B>labelVariable</B><br>
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<B>scrollMargin</B><br>
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</td>
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<td valign=top>
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<B>labelMargin</B><br>
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<B>height</B><br>
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<B>visibleitems</B><br>
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</td>
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</table>
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<P>
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See the <A HREF="scrolledtext.n.html"> "scrolledtext" </A> class manual entry for details on the inherited options.
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</pre><H2>WIDGET-SPECIFIC OPTIONS</H2>
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<P>
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<pre>
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Name: <B>feedback</B>
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Class: <B>FeedBack</B>
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Command-Line Switch: <B>-feedback</B>
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</pre>
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<UL>
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Specifies the callback command to use to give feedback on current
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status. The command is executed in the form <I>command</I> <I><number of
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characters remaining></B></I>
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</UL>
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<P>
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<pre>
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Name: <B>fixedfont</B>
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Class: <B>FixedFont</B>
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Command-Line Switch: <B>-fixedfont</B>
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</pre>
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<UL>
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Specifies the name of the font to be used for fixed-width character
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text (such as <pre>...</pre> or <tt>...</tt>.) The size, style, and
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other font attributes are determined by the format tags in the
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document. The default is courier.
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</UL>
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<P>
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<pre>
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Name: <B>fontname</B>
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Class: <B>FontName</B>
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Command-Line Switch: <B>-fontname</B>
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</pre>
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<UL>
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Specifies the name of the font to be used for normal-width character
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spaced text. The size, style, and other font attributes are
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determined by the format tags in the document. The default is times.
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</UL>
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<P>
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<pre>
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Name: <B>fontsize</B>
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Class: <B>FontSize</B>
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Command-Line Switch: <B>-fontsize</B>
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</pre>
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<UL>
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Specifies the general size of the fonts used. One of small, medium,
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large, or huge. The default is medium.
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</UL>
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<P>
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<pre>
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Name: <B>foreground</B>
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Class: <B>Foreground</B>
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Command-Line Switch: <B>-foreground</B>
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</pre>
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<UL>
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Specifies the color of text other than hypertext links, in any
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of the forms acceptable to <B>Tk_GetColor</B>. This value may
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be overridden in a particular document by the <I>text</I> attribute
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of the <B>Body</B> HTML tag.
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</UL>
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<P>
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<pre>
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Name: <B>link</B>
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Class: <B>Link</B>
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Command-Line Switch: <B>-link</B>
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</pre>
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<UL>
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Specifies the default color of hypertext links in any of the forms
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acceptable to <B>Tk_GetColor</B>. This value may be overridden in a
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particular document by the <I>link</I> attribute of the <B>Body</B>
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HTML tag. The default is blue.
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</UL>
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<P>
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<pre>
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Name: <B>linkcommand</B>
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Class: <B>LinkCommand</B>
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Command-Line Switch: <B>-linkcommand</B>
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</pre>
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<UL>
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Specifies the command to execute when the user clicks on a hypertext
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link. Execution is of the form <B>linkcommand href</B>, where <B>href</B> is
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the value given in the <I>href</I> attribute of the <B>A</B> HTML tag.
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</UL>
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<P>
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<pre>
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Name: <B>alink</B>
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Class: <B>alink</B>
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Command-Line Switch: <B>-alink</B>
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</pre>
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<UL>
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Specifies the color of hypertext links when the cursor is over the link
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in any of the forms acceptable to <B>Tk_GetColor</B>. The default is red.
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</UL>
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<P>
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<pre>
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Name: <B>textBackground</B>
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Class: <B>Background</B>
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Command-Line Switch: <B>-textbackground</B>
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</pre>
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<UL>
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Specifies the background color for the text area in any of
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the forms acceptable to <B>Tk_GetColor</B>. This value may be
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overridden in a particular document by the <I>bgcolor</I> attribute
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of the <B>Body</B> HTML tag.
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</UL>
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<P>
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<pre>
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Name: <B>unknownimage</B>
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Class: <B>UnknownImage</B>
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Command-Line Switch: <B>-unknownimage</B>
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</pre>
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<UL>
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Specifies the name of the image file to display when an <B>img</B>
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specified in the html document cannot be loaded.
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</UL>
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<P>
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<pre>
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Name: <B>update</B>
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Class: <B>Update</B>
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Command-Line Switch: <B>-alink</B>
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</pre>
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<UL>
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A boolean value indicating whether to call update during html rendering.
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</UL>
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<P>
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</pre><HR>
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</pre><H2>DESCRIPTION</H2>
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<P>
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The <B>scrolledhtml</B> command creates
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a scrolled text widget with the additional capability to display
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html formatted documents.
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An import method is provided to read an html document file, and
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a render method is provided to display a html formatted text string.
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</pre><H2>METHODS</H2>
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<P>
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The <B>scrolledhtml</B> command creates a new Tcl command whose
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name is <I>pathName</I>. This
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command may be used to invoke various
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operations on the widget. It has the following general form:
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<pre>
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<I>pathName option </I>?<I>arg arg ...</I>?
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</pre>
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<I>Option</I> and the <I>arg</I>s
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determine the exact behavior of the command. The following
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commands are possible for scrolledhtml widgets:
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</pre><H2>ASSOCIATED METHODS</H2>
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>bbox</B><br>
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<B>dlineinfo</B><br>
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<B>mark</B><br>
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<B>tag</B><br>
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</td>
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<td valign=top>
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<B>compare</B><br>
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<B>get</B><br>
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<B>scan</B><br>
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<B>window</B><br>
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</td>
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<td valign=top>
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<B>debug</B><br>
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<B>index</B><br>
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<B>search</B><br>
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<B>xview</B><br>
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</td>
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<td valign=top>
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<B>delete</B><br>
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<B>insert</B><br>
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<B>see</B><br>
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<B>yview</B><br>
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</td>
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</table>
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<P>
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See the <A HREF="http://www.sco.com/Technology/tcl/man/tk_man/text.n.html"> "text" </A> manual entry for details on the standard methods.
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</pre><H2>INHERITED METHODS</H2>
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<P>
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<table cellpadding=5>
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<td valign=top>
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<B>export</B><br>
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</td>
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<td valign=top>
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<B>clear</B><br>
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</td>
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<td valign=top>
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</td>
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<td valign=top>
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</td>
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</table>
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<P>
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See the "scrolledhtml" manual entry for details on the inherited methods.
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</pre><H2>WIDGET-SPECIFIC METHODS</H2>
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<DL>
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<DT> <I>pathName <B>cget</B> <I>option</I>
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</I></B>
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<DD> Returns the current value of the configuration option given
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by <I>option</I>.
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<I>Option</I> may have any of the values accepted by the <B>scrolledhtml</B>
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command.
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</DL>
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<DL>
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<DT> <I>pathName</I> <B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?
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</I></B>
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<DD> Query or modify the configuration options of the widget.
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If no <I>option</I> is specified, returns a list describing all of
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the available options for <I>pathName</I> (see <B>Tk_ConfigureInfo</B> for
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information on the format of this list). If <I>option</I> is specified
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with no <I>value</I>, then the command returns a list describing the
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one named option (this list will be identical to the corresponding
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sublist of the value returned if no <I>option</I> is specified). If
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one or more <I>option-value</I> pairs are specified, then the command
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modifies the given widget option(s) to have the given value(s); in
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this case the command returns an empty string.
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<I>Option</I> may have any of the values accepted by the <B>scrolledhtml</B>
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command.
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</DL>
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<DL>
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<DT> <I>pathName</I> <B>import</B> ?<I>option</I>? <I>href</I>
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</I></B>
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<DD> Load html formatted text from a file. <I>Href</I> must exist.
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If <I>option</I> is -link, <I>href</I> is assumed to be relative
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to the application's current working directory. Otherwise,
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<I>href</I> is assumed to be relative to the path of the last
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page loaded. <I>Href</I> is either a filename, or a reference
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of the form <I>filename</I>#<I>anchorname</I>. In the latter form,
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fIFilename</B></I> and/or <I>anchorname</I> may be empty.
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If <I>filename</I> is empty, the current document is assumed.
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If <I>anchorname</I> is empty, the top of the document is assumed.
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</DL>
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<DL>
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<DT> <I>pathName</I> <B>pwd</B>
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</I></B>
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<DD> Print the current working directory of the widget, i.e. the directory of the
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last page loaded.
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</DL>
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<DL>
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<DT> <I>pathName</I> <B>render</B> <I>htmltext</I> ?<I>wd</I>?
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</I></B>
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<DD> Display HTML formatted text <I>htmltext</I>. <I>Wd</I> gives the base
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path to use for all links and images in the document. <I>Wd</I> defaults
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to the application's current working directory.
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</DL>
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<DL>
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<DT> <I>pathName</I> <B>title</B>
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</I></B>
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<DD> Return the title of the current page, as given in the <title>...</title>
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field in the document.
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</DL>
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</pre><H2>HTML COMPLIANCE</H2>
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<P>
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This widget is compliant with HTML 3.2 with the following exceptions:
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<P>
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No features requiring a connection to an http server are supported.
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<P>
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Some image alignments aren't supported, because they are not supported by
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the text widget.
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<P>
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The <br> attributes dealing with image alignments aren't supported.
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<P>
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Automatic table sizing is not supported very well, due to limitations of the
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text widget
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</UL>
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</pre><H2>EXAMPLE</H2>
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<pre>
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option add *textBackground white
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scrolledhtml .sh -fontname helvetica -linkcommand "this import -link"
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pack .sh -padx 10 -pady 10 -fill both -expand yes
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.sh import ~/public_html/index.html
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</pre>
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</pre><H2>BUGS</H2>
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<UL>
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Cells in a table can be caused to overlap. ex:
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<table border width="100%">
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<tr><td>cell1</td><td align=right rowspan=2>cell2</td></tr>
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<tr><td colspan=2>cell3 w/ overlap</td>
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</table>
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It hasn't been fixed because 1) it's a pain to fix, 2) it will slow
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tables down by a significant amount, and 3) netscape has the same
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bug, as of V3.01.
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</UL>
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</pre><H2>ACKNOWLEDGEMENTS</H2>
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Sam Shen
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<UL>
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This code is based largely on his tkhtml.tcl code from tk inspect. Tkhtml
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is copyright 1995 Lawrence Berkeley Laboratory.
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</UL>
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<P>
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</pre><H2>AUTHOR</H2>
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Kris Raney
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</pre><H2>KEYWORDS</H2>
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scrolledhtml, html, text, widget
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