Silverstripe: LinkingMode with Custom Controller - content-management-system

Question

I have following problem:
Some links that show up in the Menu (the children of "Portfolio") are links to custom controllers. Of course now the LinkingMode is not available for that Links. Thats a image of the Menu:
So the children of Portfolio (Website, Application, etc.) are actually Category-DataObjects, which do not have a SiteTree Representation. The Submenu of Portfolio is created via checking and looping for all found categories in the Database.
The menu creation looks like that:
<ul>
<% loop Menu(1) %>
<li class="$LinkingMode">
[$LinkingMode] $MenuTitle.XML
<% if Children %>
<ul class="secondary">
<% if ClassName == 'ProjectsPage' %>
<% loop $Top.Categories %> <!-- loop all found categories, every found item links to the custom category controller -->
<li class="$LinkingMode">$Name</li>
<% end_loop %>
<% else %>
<% loop Children %>
<li class="$LinkingMode"><span class="text">$MenuTitle.XML</span></li>
<% end_loop %>
<% end_if %>
</ul>
<% end_if %>
</li>
<% end_loop %>
</ul>
Every Category (Website, Mobile) in the Menu links to a custom controller, which looks basically like that:
class Category_Controller extends Page_Controller {
public function show($arguments) {
return $this; //there will be more code to display all projects of a category
}
}
I expect that I have to add some custom code for the Category_Controller which tells the Portfolio Page which linkingmode it has...
Many thx,
Florian

Answer 1

I´ve found good tips here:
http://www.ssbits.com/snippets/2009/extending-linkingmode-to-handle-controller-actions/
http://www.ssbits.com/tutorials/2010/dataobjects-as-pages-part-1-keeping-it-simple/
Thats the Category_Controller.php (a public var CategoryID is set there):
class Category_Controller extends Page_Controller {
public $CategoryID;
public function index($arguments) {
$slug = $arguments->param("Slug");
$category = Category::get()->filter(array('Slug' => $slug))->First();
$this->CategoryID = $category->ID;
}
}
DataObject Category (LinkingMode function checks if the current CategoryID set in the Controller equals the ID of the Category DateObject):
class Category extends DataObject {
public function LinkingMode(){
$categoryID = Controller::curr()->CategoryID;
return ($categoryID == $this->ID) ? 'current' : 'link';
}
}
In the template you can check then the linking mode as usual:
<% loop $Categories %>
<li class="$LinkingMode">$Name</li>
<% end_loop %>
Cheers,
Florian