share/iwidgets4.0.1/demos/html/scrolledhtml.n.html

<TITLE>scrolledhtml - Create and manipulate a scrolled text widget with the capability</TITLE>
<H1>scrolledhtml - Create and manipulate a scrolled text widget with the capability</H1>

of displaying HTML formatted documents.
</pre><H2>SYNOPSIS</H2>
<B>scrolledhtml<I> <I>pathName </I>?<I>options</I>?
</pre><H2>INHERITANCE</H2>
itk::Widget &lt;- Labeledwidget &lt;- Scrolledtext &lt;- Scrolledhtml
</pre><H2>STANDARD OPTIONS</H2>
<P>
<table cellpadding=5>
<td valign=top>
<B>activeBackground</B><br>
<B>exportSelection</B><br>
<B>insertBackground</B><br>
<B>insertWidth</B><br>
<B>repeatDelay</B><br>
<B>selectForeground</B><br>
</td>
<td valign=top>
<B>background</B><br>
<B>foreground</B><br>
<B>insertBorderWidth</B><br>
<B>padX</B><br>
<B>repeatInterval</B><br>
<B>setGrid</B><br>
</td>
<td valign=top>
<B>borderWidth</B><br>
<B>highlightColor</B><br>
<B>insertOffTime</B><br>
<B>padY</B><br>
<B>selectBackground</B><br>
</td>
<td valign=top>
<B>cursor</B><br>
<B>highlightThickness</B><br>
<B>insertOnTime</B><br>
<B>relief</B><br>
<B>selectBorderWidth</B><br>
</td>
</table>
<P>
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.
</pre><H2>ASSOCIATED OPTIONS</H2>
<P>
<table cellpadding=5>
<td valign=top>
<B>activeRelief</B><br>
</td>
<td valign=top>
<B>elementBorderWidth</B><br>
</td>
<td valign=top>
<B>jump</B><br>
</td>
<td valign=top>
<B>troughColor</B><br>
</td>
</table>
<P>
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
associated options.
<P>
<table cellpadding=5>
<td valign=top>
<B>spacing1</B><br>
<B>tabs</B><br>
</td>
<td valign=top>
<B>spacing2</B><br>
<B>wrap</B><br>
</td>
<td valign=top>
<B>spacing3</B><br>
</td>
<td valign=top>
<B>state</B><br>
</td>
</table>
<P>
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
associated options.
</pre><H2>INHERITED OPTIONS</H2>
<P>
<table cellpadding=5>
<td valign=top>
<B>labelBitmap</B><br>
<B>labelPos</B><br>
<B>hscrollMode</B><br>
<B>vscrollMode</B><br>
</td>
<td valign=top>
<B>labelFont</B><br>
<B>labelText</B><br>
<B>sbWidth</B><br>
<B>width</B><br>
</td>
<td valign=top>
<B>labelImage</B><br>
<B>labelVariable</B><br>
<B>scrollMargin</B><br>
</td>
<td valign=top>
<B>labelMargin</B><br>
<B>height</B><br>
<B>visibleitems</B><br>
</td>
</table>
<P>
See the <A HREF="scrolledtext.n.html"> "scrolledtext" </A> class manual entry for details on the inherited options.
</pre><H2>WIDGET-SPECIFIC OPTIONS</H2>
<P>
<pre>
Name:                   <B>feedback</B>
Class:                  <B>FeedBack</B>
Command-Line Switch:	<B>-feedback</B>
</pre>
<UL>
Specifies the callback command to use to give feedback on current
status. The command is executed in the form <I>command</I> <I>&lt;number of 
characters remaining&gt;</B></I>
</UL>
<P>
<pre>
Name:                   <B>fixedfont</B>
Class:                  <B>FixedFont</B>
Command-Line Switch:	<B>-fixedfont</B>
</pre>
<UL>
Specifies the name of the font to be used for fixed-width character
text (such as &lt;pre&gt;...&lt;/pre&gt; or &lt;tt&gt;...&lt;/tt&gt;.) The size, style, and 
other font attributes are determined by the format tags in the 
document. The default is courier.
</UL>
<P>
<pre>
Name:                   <B>fontname</B>
Class:                  <B>FontName</B>
Command-Line Switch:	<B>-fontname</B>
</pre>
<UL>
Specifies the name of the font to be used for normal-width character 
spaced text. The size, style, and other font attributes are 
determined by the format tags in the document. The default is times.
</UL>
<P>
<pre>
Name:                   <B>fontsize</B>
Class:                  <B>FontSize</B>
Command-Line Switch:	<B>-fontsize</B>
</pre>
<UL>
Specifies the general size of the fonts used. One of small, medium,
large, or huge. The default is medium.
</UL>
<P>
<pre>
Name:                   <B>foreground</B>
Class:                  <B>Foreground</B>
Command-Line Switch:	<B>-foreground</B>
</pre>
<UL>
Specifies the color of text other than hypertext links, in any 
of the forms acceptable to <B>Tk_GetColor</B>. This value may
be overridden in a particular document by the <I>text</I> attribute 
of the <B>Body</B> HTML tag.
</UL>
<P>
<pre>
Name:                   <B>link</B>
Class:                  <B>Link</B>
Command-Line Switch:	<B>-link</B>
</pre>
<UL>
Specifies the default color of hypertext links in any of the forms
acceptable to <B>Tk_GetColor</B>. This value may be overridden in a
particular document by the <I>link</I> attribute of the <B>Body</B> 
HTML tag. The default is blue.
</UL>
<P>
<pre>
Name:                   <B>linkcommand</B>
Class:                  <B>LinkCommand</B>
Command-Line Switch:	<B>-linkcommand</B>
</pre>
<UL>
Specifies the command to execute when the user clicks on a hypertext
link. Execution is of the form <B>linkcommand href</B>, where <B>href</B> is
the value given in the <I>href</I> attribute of the <B>A</B> HTML tag.
</UL>
<P>
<pre>
Name:                   <B>alink</B>
Class:                  <B>alink</B>
Command-Line Switch:	<B>-alink</B>
</pre>
<UL>
Specifies the color of hypertext links when the cursor is over the link
in any of the forms acceptable to <B>Tk_GetColor</B>. The default is red.
</UL>
<P>
<pre>
Name:                   <B>textBackground</B>
Class:                  <B>Background</B>
Command-Line Switch:	<B>-textbackground</B>
</pre>
<UL>
Specifies the background color for the text area in any of 
the forms acceptable to <B>Tk_GetColor</B>. This value may be 
overridden in a particular document by the <I>bgcolor</I> attribute 
of the <B>Body</B> HTML tag.
</UL>
<P>
<pre>
Name:                   <B>unknownimage</B>
Class:                  <B>UnknownImage</B>
Command-Line Switch:	<B>-unknownimage</B>
</pre>
<UL>
Specifies the name of the image file to display when an <B>img</B>
specified in the html document cannot be loaded.
</UL>
<P>
<pre>
Name:                   <B>update</B>
Class:                  <B>Update</B>
Command-Line Switch:	<B>-alink</B>
</pre>
<UL>
A boolean value indicating whether to call update during html rendering.
</UL>
<P>
</pre><HR>

</pre><H2>DESCRIPTION</H2>
<P>
The <B>scrolledhtml</B> command creates 
a scrolled text widget with the additional capability to display
html formatted documents.
An import method is provided to read an html document file, and
a render method is provided to display a html formatted text string.

</pre><H2>METHODS</H2>
<P>
The <B>scrolledhtml</B> command creates a new Tcl command whose
name is <I>pathName</I>.  This
command may be used to invoke various
operations on the widget.  It has the following general form:
<pre>
<I>pathName option </I>?<I>arg arg ...</I>?
</pre>
<I>Option</I> and the <I>arg</I>s
determine the exact behavior of the command.  The following
commands are possible for scrolledhtml widgets:
</pre><H2>ASSOCIATED METHODS</H2>
<P>
<table cellpadding=5>
<td valign=top>
<B>bbox</B><br>
<B>dlineinfo</B><br>
<B>mark</B><br>
<B>tag</B><br>
</td>
<td valign=top>
<B>compare</B><br>
<B>get</B><br>
<B>scan</B><br>
<B>window</B><br>
</td>
<td valign=top>
<B>debug</B><br>
<B>index</B><br>
<B>search</B><br>
<B>xview</B><br>
</td>
<td valign=top>
<B>delete</B><br>
<B>insert</B><br>
<B>see</B><br>
<B>yview</B><br>
</td>
</table>
<P>
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.
</pre><H2>INHERITED METHODS</H2>
<P>
<table cellpadding=5>
<td valign=top>
<B>export</B><br>
</td>
<td valign=top>
<B>clear</B><br>
</td>
<td valign=top>
</td>
<td valign=top>
</td>
</table>
<P>
See the "scrolledhtml" manual entry for details on the inherited methods.

</pre><H2>WIDGET-SPECIFIC METHODS</H2>
<DL>
<DT> <I>pathName <B>cget</B> <I>option</I>
</I></B>
<DD> Returns the current value of the configuration option given
by <I>option</I>.
<I>Option</I> may have any of the values accepted by the <B>scrolledhtml</B>
command.
</DL>
<DL>
<DT> <I>pathName</I> <B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?
</I></B>
<DD> Query or modify the configuration options of the widget.
If no <I>option</I> is specified, returns a list describing all of
the available options for <I>pathName</I> (see <B>Tk_ConfigureInfo</B> for
information on the format of this list).  If <I>option</I> is specified
with no <I>value</I>, then the command returns a list describing the
one named option (this list will be identical to the corresponding
sublist of the value returned if no <I>option</I> is specified).  If
one or more <I>option-value</I> pairs are specified, then the command
modifies the given widget option(s) to have the given value(s);  in
this case the command returns an empty string.
<I>Option</I> may have any of the values accepted by the <B>scrolledhtml</B>
command.
</DL>
<DL>
<DT> <I>pathName</I> <B>import</B> ?<I>option</I>? <I>href</I>
</I></B>
<DD> Load html formatted text from a file.  <I>Href</I> must exist.
If <I>option</I> is -link, <I>href</I> is assumed to be relative
to the application's current working directory. Otherwise, 
<I>href</I> is assumed to be relative to the path of the last
page loaded. <I>Href</I> is either a filename, or a reference
of the form <I>filename</I>#<I>anchorname</I>. In the latter form,
fIFilename</B></I> and/or <I>anchorname</I> may be empty. 
If <I>filename</I> is empty, the current document is assumed. 
If <I>anchorname</I> is empty, the top of the document is assumed.
</DL>
<DL>
<DT> <I>pathName</I> <B>pwd</B>
</I></B>
<DD> Print the current working directory of the widget, i.e. the directory of the
last page loaded.
</DL>
<DL>
<DT> <I>pathName</I> <B>render</B> <I>htmltext</I> ?<I>wd</I>?
</I></B>
<DD> Display HTML formatted text <I>htmltext</I>. <I>Wd</I> gives the base
path to use for all links and images in the document. <I>Wd</I> defaults
to the application's current working directory.
</DL>
<DL>
<DT> <I>pathName</I> <B>title</B>
</I></B>
<DD> Return the title of the current page, as given in the &lt;title&gt;...&lt;/title&gt;
field in the document.

</DL>
</pre><H2>HTML COMPLIANCE</H2>
<P>
This widget is compliant with HTML 3.2 with the following exceptions:
<P>
No features requiring a connection to an http server are supported.
<P>
Some image alignments aren't supported, because they are not supported by
the text widget.
<P>
The &lt;br&gt; attributes dealing with image alignments aren't supported.
<P>
Automatic table sizing is not supported very well, due to limitations of the
text widget
</UL>
</pre><H2>EXAMPLE</H2>
<pre>
 option add *textBackground white

 scrolledhtml .sh -fontname helvetica -linkcommand "this import -link"

 pack .sh -padx 10 -pady 10 -fill both -expand yes

 .sh import ~/public_html/index.html
</pre>
</pre><H2>BUGS</H2>
<UL>
Cells in a table can be caused to overlap. ex:
    &lt;table border width="100%"&gt;
    &lt;tr&gt;&lt;td&gt;cell1&lt;/td&gt;&lt;td align=right rowspan=2&gt;cell2&lt;/td&gt;&lt;/tr&gt;
    &lt;tr&gt;&lt;td colspan=2&gt;cell3 w/ overlap&lt;/td&gt;
    &lt;/table&gt;
It hasn't been fixed because 1) it's a pain to fix, 2) it will slow
tables down by a significant amount, and 3) netscape has the same
bug, as of V3.01.
</UL>
</pre><H2>ACKNOWLEDGEMENTS</H2>
Sam Shen
<UL>
This code is based largely on his tkhtml.tcl code from tk inspect. Tkhtml
is copyright 1995 Lawrence Berkeley Laboratory.
</UL>
<P>
</pre><H2>AUTHOR</H2>
Kris Raney
</pre><H2>KEYWORDS</H2>
scrolledhtml, html, text, widget