| // +----------------------------------------------------------------------+ // // $Id: TreeMenu.php,v 1.1 2006-12-14 15:04:29 jp_milcent 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 * @package DB_NestedSet * @version $Revision: 1.1 $ * @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() /** *

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'

* * @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(); } // }}} // }}} // {{{ tree_toHTML() /** * Returns the HTML for the DHTML-menu. This method can be * used instead of printMenu() to use the menu system * with a template system. * * @access public * @return string The HTML for the menu * @Author Emanuel Zueger */ function tree_toHTML() { $options = $this->_getOptions('toHTML'); $tree =& new HTML_TreeMenu_DHTML($this->_structTreeMenu, $options); return $tree->toHTML(); } // }}} // {{{ listbox_toHTML() /** * Returns the HTML for the listbox. This method can be * used instead of printListbox() to use the menu system * with a template system. * * @access public * @return string The HTML for the listbox * @author Emanuel Zueger */ function listbox_toHTML() { $options = $this->_getOptions('toHTML'); $listBox =& new HTML_TreeMenu_Listbox($this->_structTreeMenu, $options); return $listBox->toHTML(); } // }}} } ?>