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<?php
//
// +----------------------------------------------------------------------+
// | PEAR :: DB_NestedSet_TreeMenu |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Jason Rust <jrust@rustyparts.com> |
// +----------------------------------------------------------------------+
//
// $Id: TreeMenu.php,v 1.10 2003/07/18 18:52:10 jrust Exp $
//
require_once 'HTML/TreeMenu.php';
// {{{ DB_NestedSet_TreeMenu:: class
/**
* A helper class to translate the data from a nested set table into a HTML_TreeMenu object
* so that it can be used to create a dynamic tree menu using the PEAR HTML_TreeMenu class.
*
* @see docs/TreeMenu_example.php
* @author Jason Rust <jrust@rustyparts.com>
* @package DB_NestedSet
* @version $Revision: 1.10 $
* @access public
*/
// }}}
class DB_NestedSet_TreeMenu extends DB_NestedSet_Output {
// {{{ properties
/**
* @var array The current menu structure
* @access private
*/
var $_structTreeMenu = false;
// }}}
// {{{ DB_NestedSet_TreeMenu
function &DB_NestedSet_TreeMenu($params) {
$this->_structTreeMenu =& $this->_createFromStructure($params);
}
// }}}
// {{{ _createFromStructure()
/**
* <pre>Creates a HTML_TreeMenu structure based off of the results from getAllNodes() method
* of the DB_NestedSet class. The needed parameters are:
* o 'structure' => the result from $nestedSet->getAllNodes(true)
* o 'textField' => the field in the table that has the text for node
* o 'linkField' => the field in the table that has the link for the node
* o 'options' => (optional) an array of any additional options to pass to the node when
* Additionally these parameters may be added to the individual nodes to control their
* behavior:
* o 'ensureVisible' => (optional) whether or not the field should be forced as visible
* creating it such as 'icon' or 'expandedIcon'
* o 'events' => (optional) an array of any events to pass to the node when creating it
* such as 'onclick' or 'onexpand'</pre>
*
* @access public
* @return object A HTML_TreeMenu object
*/
function &_createFromStructure($params)
{
// Basically we go through the array of nodes checking to see
// if each node has children and if so recursing. The reason this
// works is because the data from getAllNodes() is ordered by level
// so a root node will always be first, and sub children will always
// be after them.
if (!isset($params['treeMenu'])) {
$treeMenu =& new HTML_TreeMenu();
} else {
$treeMenu =& $params['treeMenu'];
}
// always start at level 1
if (!isset($params['currentLevel'])) {
$params['currentLevel'] = 1;
}
// have to use a while loop here because foreach works on a copy of the array and
// the child nodes are passed by reference during the recursion so that the parent
// will know when they have been hit.
reset($params['structure']);
while(list($key, $node) = each($params['structure'])) {
// see if we've already been here before
if (isset($node['hit'])) {
continue;
}
// mark that we've hit this node
$params['structure'][$key]['hit'] = $node['hit'] = true;
$tag = array(
'text' => $node[$params['textField']],
'link' => $node[$params['linkField']],
'ensureVisible' => isset($node['ensureVisible']) ? $node['ensureVisible'] : false,
);
$options = isset($params['options']) ? array_merge($params['options'], $tag) : $tag;
$events = isset($node['events']) ? $node['events'] : array();
$parentNode =& $treeMenu->addItem(new HTML_TreeNode($options, $events));
// see if it has children
if (($node['r'] - 1) != $node['l']) {
$children = array();
// harvest all the children
$tempStructure = $params['structure'];
foreach ($tempStructure as $childKey => $childNode) {
if (!isset($childNode['hit']) &&
$childNode['l'] > $node['l'] &&
$childNode['r'] < $node['r'] &&
$childNode['rootid'] == $node['rootid']) {
// important that we assign it by reference here, so that when the child
// marks itself 'hit' the parent loops will know
$children[] =& $params['structure'][$childKey];
}
}
$recurseParams = $params;
$recurseParams['structure'] = $children;
$recurseParams['treeMenu'] =& $parentNode;
$recurseParams['currentLevel']++;
$this->_createFromStructure($recurseParams);
}
}
return $treeMenu;
}
// }}}
// {{{ printTree()
/**
* Print's the current tree using the output driver
*
* @access public
*/
function printTree() {
$options = $this->_getOptions('printTree');
$tree =& new HTML_TreeMenu_DHTML($this->_structTreeMenu, $options);
$tree->printMenu();
}
// }}}
// {{{ printListbox()
/**
* Print's a listbox representing the current tree
*
* @access public
*/
function printListbox() {
$options = $this->_getOptions('printListbox');
$listBox =& new HTML_TreeMenu_Listbox($this->_structTreeMenu, $options);
$listBox->printMenu();
}
// }}}
}
?>
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