NAME¶
HTML::TagCloud - Generate An HTML Tag Cloud
SYNOPSIS¶
# A cloud with tags that link to other web pages.
my $cloud = HTML::TagCloud->new;
$cloud->add($tag1, $url1, $count1);
$cloud->add($tag2, $url2, $count2);
$cloud->add($tag3, $url3, $count3);
my $html = $cloud->html_and_css(50);
# A cloud with tags that do not link to other web pages.
my $cloud = HTML::TagCloud->new;
$cloud->add_static($tag1, $count1);
$cloud->add_static($tag2, $count2);
$cloud->add_static($tag3, $count3);
my $html = $cloud->html_and_css(50);
# A cloud that is comprised of tags in multiple categories.
my $cloud = HTML::TagCloud->new;
$cloud->add($tag1, $url1, $count1, $category1);
$cloud->add($tag2, $url2, $count2, $category2);
$cloud->add($tag3, $url3, $count3, $category3);
my $html = $cloud->html_and_css(50);
# The same cloud without tags that link to other web pages.
my $cloud = HTML::TagCloud->new;
$cloud->add_static($tag1, $count1, $category1);
$cloud->add_static($tag2, $count2, $category2);
$cloud->add_static($tag3, $count3, $category3);
my $html = $cloud->html_and_css(50);
# Obtaining uncategorized HTML for a categorized tag cloud.
my $html = $cloud->html_without_categories();
# Explicitly requesting categorized HTML.
my $html = $cloud->html_with_categories();
DESCRIPTION¶
The HTML::TagCloud module enables you to generate "tag clouds" in
HTML. Tag clouds serve as a textual way to visualize terms and topics that are
used most frequently. The tags are sorted alphabetically and a larger font is
used to indicate more frequent term usage.
Example sites with tag clouds: <
http://www.43things.com/>,
<
http://www.astray.com/recipes/> and
<
http://www.flickr.com/photos/tags/>.
This module provides a simple interface to generating a CSS-based HTML tag
cloud. You simply pass in a set of tags, their URL and their count. This
module outputs stylesheet-based HTML. You may use the included CSS or use your
own.
CONSTRUCTOR¶
new¶
The constructor takes a few optional arguments:
my $cloud = HTML::TagCloud->new(levels=>10);
if not provided, levels defaults to 24
my $cloud = HTML::TagCloud->new(distinguish_adjacent_tags=>1);
If distinguish_adjacent_tags is true HTML::TagCloud will use different CSS
classes for adjacent tags in order to be able to make it easier to distinguish
adjacent multi-word tags. If not specified, this parameter defaults to a false
value.
my $cloud = HTML::TagCloud->new(categories=>\@categories);
If categories are provided then tags are grouped in separate divisions by
category when the HTML fragment is generated.
METHODS¶
add¶
This module adds a tag into the cloud. You pass in the tag name, its URL and its
count:
$cloud->add($tag1, $url1, $count1);
$cloud->add($tag2, $url2, $count2);
$cloud->add($tag3, $url3, $count3);
add_static¶
This module adds a tag that does not link to another web page into the cloud.
You pass in the tag name and its count:
$cloud->add_static($tag1, $count1);
$cloud->add_static($tag2, $count2);
Returns a list of hashrefs representing each tag in the cloud, sorted by
alphabet. Each tag has the following keys: name, count, url and level.
css¶
This returns the CSS that will format the HTML returned by the
html()
method with tags which have a high count as larger:
my $css = $cloud->css;
html($limit)¶
This returns the tag cloud as HTML without the embedded CSS (you should use both
css() and
html() or simply the
html_and_css() method). If
any categories were specified when items were being placed in the cloud then
the tags will be organized into divisions by category name. If a limit is
provided, only the top $limit tags are in the cloud, otherwise all the tags
are in the cloud:
my $html = $cloud->html(200);
html_with_categories($limit)¶
This returns the tag cloud as HTML without the embedded CSS. The tags will be
arranged into divisions by category. If a limit is provided, only the top
$limit tags are in the cloud. Otherwise, all tags are in the cloud.
html_without_categories($limit)¶
This returns the tag cloud as HTML without the embedded CSS. The tags will not
be grouped by category if this method is used to generate the HTML.
html_and_css($limit)¶
This returns the tag cloud as HTML with embedded CSS. If a limit is provided,
only the top $limit tags are in the cloud, otherwise all the tags are in the
cloud:
my $html_and_css = $cloud->html_and_css(50);
AUTHOR¶
Leon Brocard, "<acme@astray.com>".
COPYRIGHT¶
Copyright (C) 2005-6, Leon Brocard
This module is free software; you can redistribute it or modify it under the
same terms as Perl itself.