Viewing file:  CollapsingTree.php (2.92 KB) -rw-rw-rw-
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* @package SPLIB
* @version $Id: CollapsingTree.php,v 1.1 2003/12/12 08:06:02 kevin Exp $
*/
/**
* CollapsingTree class
* <pre>
* Home
* - About
* - Contact
* Products
* Etc
* </pre>
* @access public
* @package SPLIB
*/
class CollapsingTree extends Menu {
/**
* All parent nodes from the current location
* @access private
* @var array
*/
var $parents;
/**
* The children of the select parents
* @access private
* @var array
*/
var $children;
/**
* CollapsingTree constructor
* @param object database connection
* @param string URL fragment
* @access public
*/
function CollapsingTree (&$db,$location='') {
Menu::Menu($db);
$treeItem=$this->locate($location);
$this->parents=array($treeItem->name()=>$treeItem);
$this->getParents($treeItem);
$this->getChildren();
$this->build();
}
/**
* Resursive function that fetches all parents
* above the current location
* @param object instance of MenuItem
* @return void
* @access private
*/
function getParents($treeItem) {
foreach ( $this->items as $item ) {
if ($treeItem->parent_id() == $item->id()) {
$this->parents[$item->name()]=$item;
$this->getParents($item);
}
}
}
/**
* Gets the children of each selected parent
* @return void
* @access private
*/
function getChildren() {
foreach ( $this->parents as $parent ) {
$this->children[$parent->name()]=array();
foreach ( $this->items as $item ) {
if ( $item->parent_id() == $parent->id() ) {
$this->children[$parent->name()][]=$item;
}
}
}
}
/**
* Resursive function that adds any children to the
* current node
* @param object instance of MenuItem
* @return void
* @access private
*/
function appendChildren ($item) {
if (array_key_exists($item->name(),$this->parents)) {
$this->menu[]=new Marker('start');
foreach ( $this->children[$item->name()] as $child ) {
$this->menu[]=$child;
$this->appendChildren($child);
}
$check=end($this->menu);
if ( $check->isStart() )
array_pop($this->menu);
else
$this->menu[]=new Marker('end');
}
}
/**
* Starts construction, building the root elements
* @return void
* @access private
*/
function build () {
foreach ( $this->items as $item ) {
if ( $item->isRoot() ) {
$this->menu[]=$item;
$this->appendChildren($item);
}
}
reset ( $this->menu );
}
}
?>
|