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Full Discussion: Tool Tip on a Perl CGI script
Top Forums Web Development Tool Tip on a Perl CGI script Post 302218069 by cbkihong on Thursday 24th of July 2008 09:39:03 AM
Old 07-24-2008
Depends how you would like to get the tool tips to appear, and on what kinds of elements. There are mostly two ways I can think of: plain HTML or Javascript/DHTML.

For instance, on many HTML elements you can use the 'title' tag attribute and many browsers will render its value as a tool tip. However, in the past I have used this on image and anchor. Not tried on other elements.

Otherwise, some people may use some Javascript/DHTML that dynamically creates a floating object containing the text at the given mouse location (as captured by the onmouseover event listener). However, this requires the browser with Javascript enabled and the script may be browser-dependent (to some extent). The javascript library listed is an example.

This does not have much to do with Perl, so it is not at all surprising that you are unable to dig anything up in the Perl docs.
 

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LEARN ABOUT DEBIAN

html::display

HTML::Display(3pm)					User Contributed Perl Documentation					HTML::Display(3pm)

NAME

       HTML::Display - display HTML locally in a browser

SYNOPSIS

	 use strict;
	 use HTML::Display;

	 # guess the best value from $ENV{PERL_HTML_DISPLAY_CLASS}
	 # or $ENV{PERL_HTML_DISPLAY_COMMAND}
	 # or the operating system, in that order
	 my $browser = HTML::Display->new();
	 warn "# Displaying HTML using " . ref $browser;
	 my $location = "http://www.google.com/";
	 $browser->display(html => $html, location => $location);

	 # Or, for a one-off job :
	 display("<html><body><h1>Hello world!</h1></body></html>");

DESCRIPTION

       This module abstracts the task of displaying HTML to the user. The displaying is done by launching a browser and navigating it to either a
       temporary file with the HTML stored in it, or, if possible, by pushing the HTML directly into the browser window.

       The module tries to automagically select the "correct" browser, but if it dosen't find a good browser, you can modify the behaviour by
       setting some environment variables :

	 PERL_HTML_DISPLAY_CLASS

       If HTML::Display already provides a class for the browser you want to use, setting "PERL_HTML_DISPLAY_CLASS" to the name of the class will
       make HTML::Display use that class instead of what it detects.

	 PERL_HTML_DISPLAY_COMMAND

       If there is no specialized class yet, but your browser can be controlled via the command line, then setting "PERL_HTML_DISPLAY_COMMAND" to
       the string to navigate to the URL will make HTML::Display use a "system()" call to the string. A %s in the value will be replaced with the
       name of the temporary file containing the HTML to display.

   %HTML::Display::os_default
       The hash %HTML::Display::os_default contains pairs of class names for the different operating systems and routines that test whether this
       script is currently running under it. If you you want to dynamically add a new class or replace a class (or the rule), modify %os_default :

	 # Install class for MagicOS
	 $HTML::Display::os_default{"HTML::Display::MagicOS"}
	   = sub { $^O =~ qr/magic/i };

   __PACKAGE__->new %ARGS
   $browser->display( %ARGS )
       Will display the HTML. The following arguments are valid :

	 base	  => Base to which all relative links will be resolved
	 html	  => Scalar containing the HTML to be displayed
	 file	  => Scalar containing the name of the file to be displayed
						       This file will possibly be copied into a temporary file!

	 location    (synonymous to base)

       If only one argument is passed, then it is taken as if

	 html => $_[0]

       was passed.

EXPORTS

       The subroutine "display" is exported by default

COMMAND LINE USAGE

       Display some HTML to the user :

	 perl -MHTML::Display -e "display '<html><body><h1>Hello world</body></html>'"

       Display a web page to the user :

	 perl -MLWP::Simple -MHTML::Display -e "display get 'http://www.google.com'"

       Display the same page with the images also working :

	 perl -MLWP::Simple -MHTML::Display -e "display html => get('http://www.google.com'),
							location => 'http://www.google.com'"

AUTHOR

       Copyright (c) 2004-2007 Max Maischein "<corion@cpan.org>"

LICENSE

       This module is released under the same terms as Perl itself.

perl v5.10.1							    2007-10-20							HTML::Display(3pm)
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