<?php
class ResourcePage extends Page
{
   static $has_many = array (
      'Resources' => 'Resource'
   );
   
   public function getCMSFields()
   {
      $f = parent::getCMSFields();
      $manager = new FileDataObjectManager(
         $this, // Controller
         'Resources', // Source name
         'Resource', // Source class
         'Attachment', // File name on DataObject
         array(
            'Name' => 'Name',
            'Description' => 'Description',
            'Category' => 'Category'
         ), // Headings
         'getCMSFields_forPopup' // Detail fields (function name or FieldSet object)
         // Filter clause
         // Sort clause
         // Join clause
      );
      
      $manager->setFilter(
         'Category', // Name of field to filter
         'Filter by Category', // Label for filter
         singleton('Resource')->dbObject('Category')->enumValues() // Map for filter (could be $dataObject->toDropdownMap(), e.g.)
      );
      
      // If undefined, all types are allowed. Pass with or without a leading "."      
      $manager->setAllowedFileTypes(array('pdf','doc'));
      
      // Label for the upload button in the popup
      $manager->setBrowseButtonText("Upload (PDF or DOC only)");
      
      // In grid view, what field will appear underneath the icon. If left out, it defaults to the file title.
      $manager->setGridLabelField('Name');
      
      // Plural form of the objects being managed. Used on the "Add" button.
      // If left out, this defaults to [MyObjectName]s
      $manager->setPluralTitle('Resources');
            
      $f->addFieldToTab("Root.Content.Resources", $manager);

      return $f;
   }
   
   function MyFileObjects()
   {
      $filter = Director::urlParam('Action');
      return $filter ? $this->Resources("Category = '$filter'") : $this->Resources();
   }

}

class ResourcePage_Controller extends Page_Controller
{

}
?>