Source for file HierarchyPrinter.class.php

<?php
/**
 * @package polyphony.HierarchyPrinter
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: HierarchyPrinter.class.php,v 1.14 2007/09/19 14:04:46 adamfranco Exp $
 */
 
/**
 * This class will print an expandible, view of a hierarchy
 *
 * @package polyphony.HierarchyPrinter
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: HierarchyPrinter.class.php,v 1.14 2007/09/19 14:04:46 adamfranco Exp $
 */
 
class HierarchyPrinter {
    
    /**
     * Print a node and the expanded children
     * 
     * @param object $node 
     * @param string $printFunction Function that prints the current node's info.
     * @param string $hasChildrenFunction Function that returns true if the node
     *         has children.
     * @param string $getChildrenFunction Function that returns an array of the
     *         children of this node.
     * @return void 
     * @access public
     * @since 11/8/04
     */
    function printNode ($node, $harmoni,
                                $startingPathInfoKey,
                                $printFunction, 
                                $hasChildrenFunction, 
                                $getChildrenFunction, 
                                $color = NULL ) 
    {
        
        print "\n<div";
        if ($color !== NULL) {
            print " style='";
//            print " border: 1px solid #000;";
            print " padding-top: 5px; padding-left: 5px; padding-bottom: 10px;";
            print " background-color: ".$color->getHTMLcolor().";'";
        }
        print ">";
        
        // Get a string of our nodeIds
        $nodeId =$node->getId();
        
        // Break the path info into parts for the enviroment and parts that
        // designate which nodes to expand.
        $expandedNodes = explode("!", $harmoni->request->get('expanded_nodes'));
        
        print "\n\n<table>\n\t<tr><td valign='top'>";
        // Print The node
        eval('$hasChildren = '.$hasChildrenFunction.'($node);');
        if ($hasChildren) {
        ?>
 
<div style='
    border: 1px solid #000; 
    width: 15px; 
    height: 15px;
    text-align: center;
    text-decoration: none;
    font-weight: bold;
'>
        <?php
/**
 * @package polyphony.library.
 */        
            // The child nodes are already expanded for this node. 
            // Show option to collapse the list.        
            if (in_array($nodeId->getIdString(), $expandedNodes)) {
                $newExpandedNodes = array_diff($expandedNodes, 
                    array($nodeId->getIdString()));     
                $symbol = '-';
                $expanded = TRUE;
            
            // The node is not already expanded.  Show option to expand.    
            } else { 
                $newExpandedNodes = array_merge($expandedNodes, 
                    array($nodeId->getIdString())); 
                $symbol = '+';
                $expanded = FALSE;
            }
            
            $url =$harmoni->request->mkURLWithPassthrough();
            $url->setValue('expanded_nodes', implode('!', $newExpandedNodes));
            
            print "<a style='text-decoration: none;' href='".$url->write()."'>".$symbol."</a>";
            
            print "\n\t\t</div>";
            
            // Make a vertical line to connect to the line in front of the children
            if ($expanded) {
                print <<<END
        <div style='
                height: 100%; 
                border-left: 1px #000 solid;
                margin-left: 10px; 
                margin-right: 0px; 
                margin-top:0px; 
        '>&nbsp;</div>
END;
            }
            
        // The node has no children.  Do not show options to expand/collapse.
        } else {
            print "\n\t\t<div style='width: 15px;'>&nbsp;</div>";
        }
        
        print "\n\t</td><td valign='top'>\n\t\t";
        eval($printFunction.'( $node );');
        print "\n\t</td></tr>\n</table>";
        
        
        // Recursively print the children.
        
        if (in_array($nodeId->getIdString(), $expandedNodes)) {
            print <<<END
 
<div style='
    margin-left: 13px; 
    margin-right: 0px; 
    margin-top:0px; 
    padding-left: 10px;
    border-left: 1px solid #000;
END;
            print "'>";
            
            if ($color !== NULL) {
                $childColor =$color->replicate();
                $childColor->darken(20);
            } else {
                $childColor = NULL;
            }
            
            eval('$children = '.$getChildrenFunction.'($node);');
            foreach (array_keys($children) as $key) {
                HierarchyPrinter::printNode( $children[$key],                                                        $harmoni, $startingPathInfoKey, $printFunction, $hasChildrenFunction,    $getChildrenFunction, $childColor );
            }        
            print "\n</div>";
        }
        
        print "\n</div>";
    }
    
    
    
}
 
?>