Using Ditto to retrieve documents that a manager has access to edit.

$e = &$modx->Event;
$output = '';

function myChildren ($children){
    $list = '<ul>';
    foreach ($children as $id => $child){
        $list .= '<li><a href="index.php?a=27&id='.$child['self']['id'].'">'.$child['self']['pagetitle'].'</a>';
        $list .= ' <a href="index.php?a=4&pid='.$child['self']['id'].'"><img src="/manager/media/style/MODxCarbon/images/icons/page_white_add.png"></a>';
        if (isset($child['children'])){
            $list .= myChildren($child['children']);
        }
        $list .= '</li>';
    }
    $list .= '</ul>';
    return $list;
}

if ($e->name == 'OnManagerWelcomeHome') {
    $member = $modx->db->escape($_SESSION['mgrInternalKey']);
    $query  = <<<EOQ
        select distinct c.id, c.pagetitle, ifnull(c.parent, '0') parent
        from modx_member_groups      g 
        join modx_membergroup_access a ON g.user_group = a.membergroup
        join modx_document_groups    d ON d.document_group = a.documentgroup
        join modx_site_content       c ON d.document = c.id
        where g.member = $member
        order by c.pagetitle
EOQ;
    $result = $modx->db->query( $query );

    $tree = array();
    while( $row = $modx->db->getRow( $result ) ) {
        if (!isset($tree[$row['id']])){
            $tree[$row['id']] = array();
        }        
        if (!isset($tree[$row['parent']])){
            $tree[$row['parent']] = array();
        }
        if (!isset($tree[$row['parent']]['children'])){
            $tree[$row['parent']]['children'] = array();
        }
        $tree[$row['id']]['self'] = $row;
    	$tree[$row['parent']]['children'][] = &$tree[$row['id']];
    }

    foreach ($tree as $id => $branch){
        if (!isset($branch['self']) && isset($branch['children'])){
           $output .= myChildren($branch['children']);
        }
    }
}

$e->output($output);

return;