Moodle

This is very theme-specific. You can (easily?) change the size of each of the 20 sizes to what you want by overriding the css for ".content .tag_cloud" (to specifiy the base font size) and ".tag_cloud .s??" (for each tag size). The default size range goes from 0.82em to 1.2em.

The default size might not be optimal, but I am really not the best one for this. I think the default size haven't really changed.. Though, both tag blocks have been made to use the same css styles, for consistency reasons (and to make it easier the day they get merged).

I'm adding Urs to this discussion, he'll have a better idea than me of what the default css should be like.

I was just about to change the theme css when i noticed that the system only gave me 6 of the 20 possible css tags to use.

This is because the tag in my block that should have been the smallest, with just one user, is marked as .s14 instead of .s1. Is there a logic to this, i.e. is a tag weighted more if its on a users interests page compared to if its been used for a singe blog entry? Or is the intention not to use more than 6 font sizes from noow on?

There is a logic .. If the least common is marked .s14, there's a bug. http://moodle.org/tag/search.php is showing how it should be. It should assign .s1 to the least common tag, all the way up to .s20 to the most common.

I didn't code that part of the tag library, but the code is fairly small, you can have a look at http://cvs.moodle.org/moodle/tag/locallib.php?annotate=1.1.2.13#l18 to get an idea (my name is there, but that's because I moved the code around). I have the feeling it could be made more efficient, patches welcome.

Weird. I just looked at the moodle.org search cloud and it seemed fine, with tags down to s2. My own one (attached) shows nothing below s16. I'll have a poke about...

Seems to be that I have a couple of tags with extra things added, but lots with just one thing. This leads to a very flat hierarchy. The code currently starts at the biggest size and allocates smaller and smaller sizes to groups of tags with similar importance. My problem is that the lowest possible importance is reached after 4-5 iterations because tags are not used a lot yet. A better solution would be to either start the iteration at the smallest size or use a mor complicated algorithm to allocate based on proportion of total hierarchical levels. I will have a further poke about...

New version of tag_print_cloud(). The old one ranked all tags and allocated class based on position in the sequence so it was stuck for instances with only a small number of positions in the hierarchy. This one allocates based on (tag count / count of most used tag * 20), so it still works for a very flat hierarchy.

Sorry its not a proper patch!

function tag_print_cloud($nr_of_tags=150, $return=false) {

global $CFG;

$can_manage_tags = has_capability('moodle/tag:manage', get_context_instance(CONTEXT_SYSTEM));

if ( !$tagcloud = get_records_sql('SELECT tg.rawname, tg.id, tg.name, tg.tagtype, COUNT(ti.id) AS count, tg.flag '.
'FROM '. $CFG->prefix .'tag_instance ti INNER JOIN '. $CFG->prefix .'tag tg ON tg.id = ti.tagid '.
'WHERE ti.itemtype != \'tag\' '.
'GROUP BY tg.id, tg.rawname, tg.name, tg.flag, tg.tagtype '.
'ORDER BY count DESC, tg.name ASC', 0, $nr_of_tags) ) { $tagcloud = array(); }

$tagkeys = array_keys($tagcloud);
$firsttagkey = $tagkeys[0];
$maxcount = $tagcloud[$firsttagkey]->count;

$etags = array();

foreach ($tagcloud as $tag) { $size = ((int)((($tag->count) / $maxcount) * 20)); $tag->class = "$tag->tagtype s$size"; $etags[] = $tag; }

usort($etags, "tag_cloud_sort");
$output = '';
$output .= "\n<ul class='tag_cloud inline-list'>\n";
foreach ($etags as $tag) {
if ($tag->flag > 0 && $can_manage_tags) { $tagname = '<span class="flagged-tag">'. tag_display_name($tag) .'</span>'; } else { $tagname = tag_display_name($tag); }

$link = $CFG->wwwroot .'/tag/index.php?tag='. rawurlencode($tag->name);
$output .= '<li><a href="'. $link .'" class="'. $tag->class .'" '.
'title="'. get_string('numberofentries', 'blog', $tag->count) .'">'.
$tagname .'</a></li> ';
}
$output .= "\n</ul>\n";

if ($return) { return $output; } else { echo $output; }
}

Thanks, I finally gave this a try and committed it.