Thanks for the awesome tutorial. I toyed around with it for a bit and made a slight modification for Font Awesome.
<div class="forumbit_{$lightbulb['folder']}" title="{$lightbulb['altonoff']}"><i class="icon-folder-{$lightbulb['folder']}"></i></div>
Inside your global.css add the three classes .icon-folder-on, .icon-folder-off, .icon-folder-offlock that point to your respective icons. I actually used the .icon-folder-open-alt, icon-folder-closed-alt, and icon-folder-closed respectively.
.icon-folder-on:before {
content: "\f07c";
color: purple;
}
I also made forum_displaythread use Font Awesome. If you want to get crazy you can mess with .icon-stack and some of the other tricks. This omits the hot thread icons and uses the four different icon-comment series to differentiate between unread, read, read by you, and unread by you.
Change:
<td align="center" class="{$bgcolor}{$thread_type_class}" width="2%"><img src="{$theme['imgdir']}/{$folder}.gif" alt="{$folder_label}" title="{$folder_label}" /></td>
To:
<td align="center" class="{$bgcolor}{$thread_type_class}" width="2%"><i class="icon-thread-{$folder} icon-stack-base" title="{$folder_label}"></i></td>
Style however you want with CSS:
.icon-thread-folder:before{
content:"\f0e5";
color: cyan;
}
.icon-thread-newfolder:before{
content:"\f075";
color: magenta;
}
.icon-thread-dot_newfolder:before{
content:"\f086";
color: magenta;
}
.icon-thread-dot_folder:before{
content:"\f0e6";
color: cyan;
}
.icon-thread-dot_lockfolder:before,.icon-thread-lockfolder:before,.icon-thread-newlockfolder:before,.icon-thread-dot_newlockfolder:before {
content:"\f023";
color: red;
}
Change your legend in forumdisplay_threadlist:
<div class="float_left">
<div class="float_left">
<dl class="thread_legend smalltext">
<dd><i class="icon-thread-newfolder"></i>{$lang->new_thread}</dd>
<dd><i class="icon-thread-folder"></i>{$lang->no_new_thread}</dd>
</dl>
</div>
<div class="float_left">
<dl class="thread_legend smalltext">
<dd><i class="icon-thread-dot_folder"></i>{$lang->posts_by_you}</dd>
<dd><i class="icon-thread-lockfolder"></i>{$lang->locked_thread}</dd>
</dl>
</div>
<br style="clear: both" />
</div>