Treeview avec jsTree

bonjour,
j'ai suivi le tutoriel de Ivan Bozhanov sur http://www.jstree.com/demo pour créer des arbres. Toutefois, j'ai besoin de pouvoir créer plusieurs arbres, j'ai donc modifié la structure de la table donnée en exemple (qui ne contenait que les items d'un seul arbre, pas conçu pour plusieurs): j'ai ajouté une colonne IDE_plans (clé étrangère).
Mais je ne parviens pas à modifier le code en conséquence, pouvez vous m'aider? :oops:
La page php:

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<?php
/**
 * @file affichage_plan.php
 * Affichage d'un plan 
 */
$session = new Session();
 
require_once ('../params/config.inc.php');
require_once ('../classes/loader.class.inc.php');
require_once ('HTML/QuickForm.php');
 
$html = new html();
$titre_page=gettext($plan_en_cours->getTitre());
 
//	Affichage
$html->page_title = $titre_page;
$html->body_open('head.php');
 
$html->addJavascriptLibrary('jquery.js');
$html->addJavascriptLibrary('jquery.cookie.js');
$html->addJavascriptLibrary('jquery.hotkeys.js');
$html->addJavascriptLibrary('jquery.jstree.js');
 
//	titres
echo '<h2>'.gettext('Plan').'</h2>';
echo '<h4>'.$plan_en_cours->getTitre().'</h4>';
 
//	Affichage du plan - Arbre JsTree
echo '<fieldset>
	<legend>'.gettext('Plan').'</legend>

	<div id="plan" class="plan" style="height:200px;"></div>';
	?>
	<div style="height:30px; text-align:center;">
	<input type="button" style='width:170px; height:24px; margin:5px auto;' value="reconstruct" onclick="$.get('./server_jsTree.php?reconstruct', function () { $('#plan').jstree('refresh',-1); });" />
	<input type="button" style='width:170px; height:24px; margin:5px auto;' value="refresh" onclick="$('#plan').jstree('refresh',-1);" />
</div>
 
	<?php
	echo '</fieldset>';
?>
<!-- JavaScript neccessary for the tree -->
<script type="text/javascript" class="source below">
 
jQuery(document).ready(function () {
 
jQuery("#plan")
 
	.jstree({
		"core" : {
			/* core options	*/
			"html_titles" : false,
			"strings" : { loading : "Chargement en cours ...", new_node : "Nouvel intitulé" }
		},
 
		"plugins" : [ 
			"themes","json_data","ui","crrm","cookies","dnd","search","types","hotkeys","contextmenu" 
		],
 
		// I usually configure the plugin that handles the data first
		// This example uses JSON as it is most common
		"json_data" : { 
			// This tree is ajax enabled - as this is most common, and maybe a bit more complex
			// All the options are almost the same as jQuery's AJAX (read the docs)
			"ajax" : {
				// the URL to fetch the data
				"url" : "./server_jsTree.php?idplan=<?php  echo $id_plan ?>",
				// the `data` function is executed in the instance's scope
				// the parameter is the node being loaded 
				// (may be -1, 0, or undefined when loading the root nodes)
				"data" : function (n) { 
					// the result is fed to the AJAX request `data` option
					return { 
						"operation" : "get_children", 
						"id" : n.attr ? n.attr("id").replace("node_","") : 1 
					}; 
				}
			}
		},
 
		// Configuring the search plugin
		"search" : {
			// As this has been a common question - async search
			// Same as above - the `ajax` config option is actually jQuery's AJAX object
			"ajax" : {
				"url" : "./server_jsTree.php?idplan=<?php  echo $id_plan ?>",
				// You get the search string as a parameter
				"data" : function (str) {
					return { 
						"operation" : "search", 
						"search_str" : str 
					}; 
				}
			}
		},
 
		// Using types - most of the time this is an overkill
		// read the docs carefully to decide whether you need types
		"types" : {
			// I set both options to -2, as I do not need depth and children count checking
			// Those two checks may slow jstree a lot, so use only when needed
			"max_depth" : -2,
			"max_children" : -2,
			// I want only `drive` nodes to be root nodes 
			// This will prevent moving or creating any other type as a root node
			"valid_children" : [ "drive" ],
			"types" : {
				// The default type
				"default" : {
					// I want this type to have no children (so only leaf nodes)
					// In my case - those are files
					"valid_children" : "none",
					// If we specify an icon for the default type it WILL OVERRIDE the theme icons
					"icon" : {
						"image" : "./images/file.png"
					}
				},
				// The `folder` type
				"folder" : {
					// can have files and other folders inside of it, but NOT `drive` nodes
					"valid_children" : [ "default", "folder" ],
					"icon" : {
						"image" : "./images/folder2.png"
					}
				},
				// The `drive` nodes 
				"drive" : {
					// can have files and folders inside, but NOT other `drive` nodes
					"valid_children" : [ "default", "folder" ],
					"icon" : {
						"image" : "./images/root.png"
					},
					// those prevent the functions with the same name to be used on `drive` nodes
					// internally the `before` event is used
					"start_drag" : false,
					"move_node" : false,
					"delete_node" : false,
					"remove" : false
				}
			}
		},
 
		// the UI plugin - it handles selecting/deselecting/hovering nodes
		"ui" : {
			// this makes the node with ID node_4 selected onload
			"initially_select" : [ "node_1" ]
		},
 
		// the core plugin - not many options here
		"core" : { 
			// just open those two nodes up
			// as this is an AJAX enabled tree, both will be downloaded from the server
			"initially_open" : [ "node_2" , "node_3" ] 
		}
	}
	)
 
	.bind("create.jstree", function (e, data) {
		jQuery.post(
			"./server_jsTree.php?idplan=<?php  echo $id_plan ?>", 
			{ 
				"operation" : "create_node", 
				"id" : data.rslt.parent.attr("id").replace("node_",""), 
				"position" : data.rslt.position,
				"title" : data.rslt.name,
				"type" : data.rslt.obj.attr("rel")
			}, 
			function (r) {
				if(r.status) {
					jQuery(data.rslt.obj).attr("id", "node_" + r.id);
				}
				else {
					jQuery.jstree.rollback(data.rlbk);
				}
			}
		);
	})
 
	.bind("remove.jstree", function (e, data) {
		data.rslt.obj.each(function () {
			jQuery.ajax({
				async : false,
				type: 'POST',
				url: "./server_jsTree.php?idplan=<?php  echo $id_plan ?>",
				data : { 
					"operation" : "remove_node", 
					"id" : this.id.replace("node_","")
				}, 
				success : function (r) {
					if(!r.status) {
						data.inst.refresh();
					}
				}
			});
		});
	})
 
	.bind("rename.jstree", function (e, data) {
		jQuery.post(
			"./server_jsTree.php?idplan=<?php  echo $id_plan ?>", 
			{ 
				"operation" : "rename_node", 
				"id" : data.rslt.obj.attr("id").replace("node_",""),
				"title" : data.rslt.new_name
			}, 
			function (r) {
				if(!r.status) {
					jQuery.jstree.rollback(data.rlbk);
				}
			}
		);
	})
 
	.bind("move_node.jstree", function (e, data) {
		data.rslt.o.each(function (i) {
			jQuery.ajax({
				async : false,
				type: 'POST',
				url: "./server_jsTree.php?idplan=<?php  echo $id_plan ?>",
				data : { 
					"operation" : "move_node", 
					"id" : jQuery(this).attr("id").replace("node_",""), 
					"ref" : data.rslt.cr === -1 ? 1 : data.rslt.np.attr("id").replace("node_",""), 
					"position" : data.rslt.cp + i,
					"title" : data.rslt.name,
					"copy" : data.rslt.cy ? 1 : 0
				},
				success : function (r) {
					if(!r.status) {
						jQuery.jstree.rollback(data.rlbk);
					}
					else {
						jQuery(data.rslt.oc).attr("id", "node_" + r.id);
						if(data.rslt.cy && jQuery(data.rslt.oc).children("UL").length) {
							data.inst.refresh(data.inst._get_parent(data.rslt.oc));
						}
					}
					jQuery("#analyze").click();
				}
			});
		});
	});
});
</script>
<?php
$html->body_close();

server_jsTree.php:

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<?php
$id_plan=1;
if(isset($_REQUEST["idplan"])) {
	$id_plan=$_REQUEST["idplan"];
}
 
require_once("../params/config_jsTree.php");
$jstree = new json_tree();
 
$jstree->setIdePlans($id_plan);
 
if(isset($_GET["reconstruct"])) {
	$jstree->_reconstruct();
	die();
}
if(isset($_GET["analyze"])) {
	echo $jstree->_analyze();
	die();
}
 
if($_REQUEST["operation"] && strpos($_REQUEST["operation"], "_") !== 0 && method_exists($jstree, $_REQUEST["operation"])) {
	header("HTTP/1.0 200 OK");
	header('Content-type: application/json; charset=utf-8');
	header("Cache-Control: no-cache, must-revalidate");
	header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
	header("Pragma: no-cache");
	echo $jstree->{$_REQUEST["operation"]}($_REQUEST);
	die();
}
header("HTTP/1.0 404 Not Found");
?>

La classe:

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<?php
class _tree_struct {
	// Structure table and fields
	protected $table	= "";
	protected $ide_plans = 0;			// val par defaut, plan par defaut 
	protected $fields	= array(
			"id"		=> false,
			"IDE_plans"	=> false,
			"parent_id"	=> false,
			"position"	=> false,
			"left"		=> false,
			"right"		=> false,
			"level"		=> false,
			"title"		=> false,
			"type"		=> false,
			"type_item"	=> false,
			"muid"		=> false,
			"mtime"		=> false,
			"cuid"		=> false,
			"ctime"		=> false
		);
 
	// Constructor
	function __construct($table = "plans_item", $fields = array()) {
		$this->table = $table;
 
		if(!count($fields)) {
			foreach($this->fields as $k => &$v) { $v = $k; }
		}
		else {
			foreach($fields as $key => $field) {
				switch($key) {
					case "id":
					case "IDE_plans":
					case "parent_id":
					case "position":
					case "left":
					case "right":
					case "level":
					case "title":
					case "type":
					case "type_item":
					case "muid":
					case "mtime":
					case "cuid":
					case "ctime":
						$this->fields[$key] = $field;
						break;
				}
			}
		}
		// Database
		$this->db = new _database;
	}
 
	function setIdePlans($idplan) {
		$this->ide_plans=$idplan;
	}
 
	function getIdePlans() {
		return $this->ide_plans;
	}
 
	function _get_node($id) {
		$this->db->query("SELECT `".implode("` , `", $this->fields)."` 
							FROM `".$this->table."` 
							WHERE `".$this->fields["id"]."` = ".(int) $id)." 
								AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans();
		$this->db->nextr();
		return $this->db->nf() === 0 ? false : $this->db->get_row("assoc");
	}
	function _get_children($id, $recursive = false) {
		$children = array();
		$idplan=$this->getIdePlans();
 
		if($recursive) {
			$node = $this->_get_node($id);
 
			//	Mes essais :
			$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` 
								WHERE `".$this->fields["left"]."` >= ".(int) $node[$this->fields["left"]]." AND `".$this->fields["right"]."` <= ".(int) $node[$this->fields["right"]]." 
									AND `".$this->fields["IDE_plans"]."` = ".$idplan." 
								ORDER BY `".$this->fields["left"]."` ASC");
 
			//	La bonne version sigh :
			/*$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` 
								WHERE `".$this->fields["left"]."` >= ".(int) $node[$this->fields["left"]]." AND `".$this->fields["right"]."` <= ".(int) $node[$this->fields["right"]]." 
								ORDER BY `".$this->fields["left"]."` ASC");*/
		}
		else {
			//	Mes essais :
			$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` 
								WHERE `".$this->fields["parent_id"]."` = ".(int) $id." 
									AND `".$this->fields["IDE_plans"]."` = ".$idplan." 
								ORDER BY `".$this->fields["position"]."` ASC");
 
			//	La bonne version sigh :
			/*$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` 
								WHERE `".$this->fields["parent_id"]."` = ".(int) $id." 
								ORDER BY `".$this->fields["position"]."` ASC");*/
		}
		while($this->db->nextr()) $children[$this->db->f($this->fields["id"])] = $this->db->get_row("assoc");
 
		return $children;
	}
 
	function _get_path($id) {
		$node = $this->_get_node($id);
		$path = array();
		if(!$node === false) return false;
		$this->db->query("SELECT `".implode("` , `", $this->fields)."` 
							FROM `".$this->table."` 
							WHERE `".$this->fields["left"]."` <= ".(int) $node[$this->fields["left"]]." 
							AND `".$this->fields["right"]."` >= ".(int) $node[$this->fields["right"]]." 
							AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		while($this->db->nextr()) $path[$this->db->f($this->fields["id"])] = $this->db->get_row("assoc");
		return $path;
	}
 
	function _create($parent, $position) {
		return $this->_move(0, $parent, $position);
	}
	function _remove($id) {
		if((int)$id === 1) { return false; }
		$data = $this->_get_node($id);
		$lft = (int)$data[$this->fields["left"]];
		$rgt = (int)$data[$this->fields["right"]];
		$dif = $rgt - $lft + 1;
 
		// deleting node and its children
		$this->db->query("" . 
			"DELETE FROM `".$this->table."` " . 
			"WHERE `".$this->fields["left"]."` >= ".$lft." AND `".$this->fields["right"]."` <= ".$rgt
		);
		// shift left indexes of nodes right of the node
		$this->db->query("".
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` - ".$dif." " . 
			"WHERE `".$this->fields["left"]."` > ".$rgt
		);
		// shift right indexes of nodes right of the node and the node's parents
		$this->db->query("" . 
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` - ".$dif." " . 
			"WHERE `".$this->fields["right"]."` > ".$lft
		);
 
		$pid = (int)$data[$this->fields["parent_id"]];
		$pos = (int)$data[$this->fields["position"]];
 
		// Update position of siblings below the deleted node
		$this->db->query("" . 
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` - 1 " . 
			"WHERE `".$this->fields["parent_id"]."` = ".$pid." AND `".$this->fields["position"]."` > ".$pos
		);
		return true;
	}
	function _move($id, $ref_id, $position = 0, $is_copy = false) {
		if((int)$ref_id === 0 || (int)$id === 1) { return false; }
		$sql		= array();						// Queries executed at the end
		$node		= $this->_get_node($id);		// Node data
		$nchildren	= $this->_get_children($id);	// Node children
		$ref_node	= $this->_get_node($ref_id);	// Ref node data
		$rchildren	= $this->_get_children($ref_id);// Ref node children
 
		$ndif = 2;
		$node_ids = array(-1);
		if($node !== false) {
			$node_ids = array_keys($this->_get_children($id, true));
			// TODO: should be !$is_copy && , but if copied to self - screws some right indexes
			if(in_array($ref_id, $node_ids)) return false;
			$ndif = $node[$this->fields["right"]] - $node[$this->fields["left"]] + 1;
		}
		if($position >= count($rchildren)) {
			$position = count($rchildren);
		}
 
		// Not creating or copying - old parent is cleaned
		if($node !== false && $is_copy == false) {
			$sql[] = "" . 
				"UPDATE `".$this->table."` " . 
					"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` - 1 " . 
				"WHERE " . 
					"`".$this->fields["parent_id"]."` = ".$node[$this->fields["parent_id"]]." AND " . 
					"`".$this->fields["position"]."` > ".$node[$this->fields["position"]];
			$sql[] = "" . 
				"UPDATE `".$this->table."` " . 
					"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` - ".$ndif." " . 
				"WHERE `".$this->fields["left"]."` > ".$node[$this->fields["right"]];
			$sql[] = "" . 
				"UPDATE `".$this->table."` " . 
					"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` - ".$ndif." " . 
				"WHERE " . 
					"`".$this->fields["right"]."` > ".$node[$this->fields["left"]]." AND " . 
					"`".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ";
		}
		// Preparing new parent
		$sql[] = "" . 
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` + 1 " . 
			"WHERE " . 
				"`".$this->fields["parent_id"]."` = ".$ref_id." AND " . 
				"`".$this->fields["position"]."` >= ".$position." " . 
				( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
 
		$ref_ind = $ref_id === 0 ? (int)$rchildren[count($rchildren) - 1][$this->fields["right"]] + 1 : (int)$ref_node[$this->fields["right"]];
		$ref_ind = max($ref_ind, 1);
 
		$self = ($node !== false && !$is_copy && (int)$node[$this->fields["parent_id"]] == $ref_id && $position > $node[$this->fields["position"]]) ? 1 : 0;
		foreach($rchildren as $k => $v) {
			if($v[$this->fields["position"]] - $self == $position) {
				$ref_ind = (int)$v[$this->fields["left"]];
				break;
			}
		}
		if($node !== false && !$is_copy && $node[$this->fields["left"]] < $ref_ind) {
			$ref_ind -= $ndif;
		}
 
		$sql[] = "" . 
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` + ".$ndif." " . 
			"WHERE " . 
				"`".$this->fields["left"]."` >= ".$ref_ind." " . 
				( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
		$sql[] = "" . 
			"UPDATE `".$this->table."` " . 
				"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` + ".$ndif." " . 
			"WHERE " . 
				"`".$this->fields["right"]."` >= ".$ref_ind." " . 
				( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
 
		$ldif = $ref_id == 0 ? 0 : $ref_node[$this->fields["level"]] + 1;
		$idif = $ref_ind;
		if($node !== false) {
			$ldif = $node[$this->fields["level"]] - ($ref_node[$this->fields["level"]] + 1);
			$idif = $node[$this->fields["left"]] - $ref_ind;
			if($is_copy) {
				$sql[] = "" . 
					"INSERT INTO `".$this->table."` (" . 
						"`".$this->fields["parent_id"]."`, " . 
						"`".$this->fields["position"]."`, " . 
						"`".$this->fields["left"]."`, " . 
						"`".$this->fields["right"]."`, " . 
						"`".$this->fields["level"]."`" . 
					") " . 
						"SELECT " . 
							"".$ref_id.", " . 
							"`".$this->fields["position"]."`, " . 
							"`".$this->fields["left"]."` - (".($idif + ($node[$this->fields["left"]] >= $ref_ind ? $ndif : 0))."), " . 
							"`".$this->fields["right"]."` - (".($idif + ($node[$this->fields["left"]] >= $ref_ind ? $ndif : 0))."), " . 
							"`".$this->fields["level"]."` - (".$ldif.") " .
						"FROM `".$this->table."` " . 
						"WHERE " . 
							"`".$this->fields["id"]."` IN (".implode(",", $node_ids).") " . 
							" AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans().
						" ORDER BY `".$this->fields["level"]."` ASC";
			}
			else {
				$sql[] = "" . 
					"UPDATE `".$this->table."` SET " . 
						"`".$this->fields["parent_id"]."` = ".$ref_id.", " . 
						"`".$this->fields["position"]."` = ".$position." " . 
					"WHERE " . 
						"`".$this->fields["id"]."` = ".$id;
				$sql[] = "" . 
					"UPDATE `".$this->table."` SET " . 
						"`".$this->fields["left"]."` = `".$this->fields["left"]."` - (".$idif."), " . 
						"`".$this->fields["right"]."` = `".$this->fields["right"]."` - (".$idif."), " . 
						"`".$this->fields["level"]."` = `".$this->fields["level"]."` - (".$ldif.") " . 
					"WHERE " . 
						"`".$this->fields["id"]."` IN (".implode(",", $node_ids).") ";
			}
		}
		else {
			$sql[] = "" . 
				"INSERT INTO `".$this->table."` (" . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."`, " . 
					"`".$this->fields["left"]."`, " . 
					"`".$this->fields["right"]."`, " . 
					"`".$this->fields["level"]."` " .  
					") " . 
				"VALUES (" . 
					$ref_id.", " . 
					$position.", " . 
					$idif.", " . 
					($idif + 1).", " . 
					$ldif. 
				")";
		}
		foreach($sql as $q) { $this->db->query($q); }
		$ind = $this->db->insert_id();
		if($is_copy) $this->_fix_copy($ind, $position);
		return $node === false || $is_copy ? $ind : true;
	}
	function _fix_copy($id, $position) {
		$node = $this->_get_node($id);
		$children = $this->_get_children($id, true);
 
		$map = array();
		for($i = $node[$this->fields["left"]] + 1; $i < $node[$this->fields["right"]]; $i++) {
			$map[$i] = $id;
		}
		foreach($children as $cid => $child) {
			if((int)$cid == (int)$id) {
				$this->db->query("UPDATE `".$this->table."` SET `".$this->fields["position"]."` = ".$position." WHERE `".$this->fields["id"]."` = ".$cid);
				continue;
			}
			$this->db->query("UPDATE `".$this->table."` SET `".$this->fields["parent_id"]."` = ".$map[(int)$child[$this->fields["left"]]]." WHERE `".$this->fields["id"]."` = ".$cid);
			for($i = $child[$this->fields["left"]] + 1; $i < $child[$this->fields["right"]]; $i++) {
				$map[$i] = $cid;
			}
		}
	}
 
	function _reconstruct() {
		$this->db->query("" . 
			"CREATE TEMPORARY TABLE `temp_tree` (" . 
				"`".$this->fields["id"]."` INTEGER NOT NULL, " . 
				"`".$this->fields["parent_id"]."` INTEGER NOT NULL, " . 
				"`". $this->fields["position"]."` INTEGER NOT NULL, " . 
				"`". $this->fields["IDE_plans"]."` INTEGER NOT NULL" . 
			") type=HEAP"
		);
		$this->db->query("" . 
			"INSERT INTO `temp_tree` " . 
				"SELECT " . 
					"`".$this->fields["id"]."`, " . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."`, " . 
					"`".$this->fields["IDE_plans"]."` " . 
				"FROM `".$this->table."` 
				WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans() 
		);
 
		$this->db->query("" . 
			"CREATE TEMPORARY TABLE `temp_stack` (" . 
				"`".$this->fields["id"]."` INTEGER NOT NULL, " . 
				"`".$this->fields["left"]."` INTEGER, " . 
				"`".$this->fields["right"]."` INTEGER, " . 
				"`".$this->fields["level"]."` INTEGER, " . 
				"`stack_top` INTEGER NOT NULL, " . 
				"`".$this->fields["parent_id"]."` INTEGER, " . 
				"`".$this->fields["position"]."` INTEGER, " . 
				"`".$this->fields["IDE_plans"]."` INTEGER " . 
			") type=HEAP"
		);
		$counter = 2;
		$this->db->query("SELECT COUNT(*) 
							FROM temp_tree 
							WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		$this->db->nextr();
		$maxcounter = (int) $this->db->f(0) * 2;
		$currenttop = 1;
		$this->db->query("" . 
			"INSERT INTO `temp_stack` " . 
				"SELECT " . 
					"`".$this->fields["id"]."`, " . 
					"1, " . 
					"NULL, " . 
					"0, " . 
					"1, " . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."` " . 
				"FROM `temp_tree` " . 
				"WHERE `".$this->fields["parent_id"]."` = 0 
					AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()
		);
		$this->db->query("DELETE FROM `temp_tree` WHERE `".$this->fields["parent_id"]."` = 0 
					AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()
					);
 
		while ($counter <= $maxcounter) {
			$this->db->query("" . 
				"SELECT " . 
					"`temp_tree`.`".$this->fields["id"]."` AS tempmin, " . 
					"`temp_tree`.`".$this->fields["parent_id"]."` AS pid, " . 
					"`temp_tree`.`".$this->fields["position"]."` AS lid, " . 
					"`temp_tree`.`".$this->fields["IDE_plans"]."` AS idplan " . 
				"FROM `temp_stack`, `temp_tree` " . 
				"WHERE " . 
					"`temp_stack`.`".$this->fields["id"]."` = `temp_tree`.`".$this->fields["parent_id"]."` AND " . 
					"`temp_stack`.`stack_top` = ".$currenttop." 
					AND `".$this->fields["IDE_plans"]."` = " .$this->getIdePlans(). 
				" ORDER BY `temp_tree`.`".$this->fields["position"]."` ASC LIMIT 1"
			);
 
			if ($this->db->nextr()) {
				$tmp = $this->db->f("tempmin");
 
				$q = "INSERT INTO temp_stack (stack_top, `".$this->fields["id"]."`, `".$this->fields["left"]."`, `".$this->fields["right"]."`, `".$this->fields["level"]."`, `".$this->fields["parent_id"]."`, 
						`".$this->fields["position"]."`, `".$this->fields["IDE_plans"]."`) 
						VALUES(".($currenttop + 1).", ".$tmp.", ".$counter.", NULL, ".$currenttop.", ".$this->db->f("pid").", ".$this->db->f("lid").", ".$this->db->f("idplan").")";
				$this->db->query($q);
				$this->db->query("DELETE FROM `temp_tree` WHERE `".$this->fields["id"]."` = ".$tmp);
				$counter++;
				$currenttop++;
			}
			else {
				$this->db->query("" . 
					"UPDATE temp_stack SET " . 
						"`".$this->fields["right"]."` = ".$counter.", " . 
						"`stack_top` = -`stack_top` " . 
					"WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()." 
						AND `stack_top` = ".$currenttop
				);
				$counter++;
				$currenttop--;
			}
		}
 
		$temp_fields = $this->fields;
		unset($temp_fields["parent_id"]);
		unset($temp_fields["position"]);
		unset($temp_fields["left"]);
		unset($temp_fields["right"]);
		unset($temp_fields["level"]);
		unset($temp_fields["IDE_plans"]);
		if(count($temp_fields) > 1) {
			$this->db->query("" . 
				"CREATE TEMPORARY TABLE `temp_tree2` " . 
					"SELECT `".implode("`, `", $temp_fields)."` 
					FROM `".$this->table."` 
					WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()
			);
		}
		//$this->db->query("TRUNCATE TABLE `".$this->table."`");
		$this->db->query("" . 
			"INSERT INTO ".$this->table." (" . 
					"`".$this->fields["id"]."`, " . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."`, " . 
					"`".$this->fields["left"]."`, " . 
					"`".$this->fields["right"]."`, " . 
					"`".$this->fields["level"]."`, " . 
					"`".$this->fields["IDE_plans"]."` " . 
				") " . 
				"SELECT " . 
					"`".$this->fields["id"]."`, " . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."`, " . 
					"`".$this->fields["left"]."`, " . 
					"`".$this->fields["right"]."`, " . 
					"`".$this->fields["level"]."`, " . 
					"`".$this->fields["IDE_plans"]."` " . 
				"FROM temp_stack " . 
				"ORDER BY `".$this->fields["id"]."`"
		);
		if(count($temp_fields) > 1) {
			$sql = "" . 
				"UPDATE `".$this->table."` v, `temp_tree2` SET v.`".$this->fields["id"]."` = v.`".$this->fields["id"]."` ";
			foreach($temp_fields as $k => $v) {
				if($k == "id") continue;
				$sql .= ", v.`".$v."` = `temp_tree2`.`".$v."` ";
			}
			$sql .= " WHERE v.`".$this->fields["id"]."` = `temp_tree2`.`".$this->fields["id"]."` ";
			$this->db->query($sql);
		}
	}
 
	function _analyze() {
		$report = array();
 
		$this->db->query("" . 
			"SELECT " . 
				"`".$this->fields["left"]."` FROM `".$this->table."` s " . 
			"WHERE " . 
				"`".$this->fields["parent_id"]."` = 0 
				AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()
		);
		$this->db->nextr();
		if($this->db->nf() == 0) {
			$report[] = "[FAIL]\tNo root node.";
		}
		else {
			$report[] = ($this->db->nf() > 1) ? "[FAIL]\tMore than one root node." : "[OK]\tJust one root node.";
		}
		$report[] = ($this->db->f(0) != 1) ? "[FAIL]\tRoot node's left index is not 1." : "[OK]\tRoot node's left index is 1.";
 
		$this->db->query("" . 
			"SELECT " . 
				"COUNT(*) FROM `".$this->table."` s " . 
			"WHERE " . 
				"`".$this->fields["parent_id"]."` != 0 
				AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans().
				" AND " . 
				"(SELECT COUNT(*) FROM `".$this->table."` WHERE `".$this->fields["id"]."` = s.`".$this->fields["parent_id"]."`) = 0 AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		$this->db->nextr();
		$report[] = ($this->db->f(0) > 0) ? "[FAIL]\tMissing parents." : "[OK]\tNo missing parents.";
 
		$this->db->query("SELECT MAX(`".$this->fields["right"]."`) FROM `".$this->table."` WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		$this->db->nextr();
		$n = $this->db->f(0);
		$this->db->query("SELECT COUNT(*) FROM `".$this->table."` WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		$this->db->nextr();
		$c = $this->db->f(0);
		$report[] = ($n/2 != $c) ? "[FAIL]\tRight index does not match node count." : "[OK]\tRight index matches count.";
 
		$this->db->query("" . 
			"SELECT COUNT(`".$this->fields["id"]."`) FROM `".$this->table."` s " . 
			"WHERE 
				`".$this->fields["IDE_plans"]."` = ".$this->getIdePlans(). 
				" AND (SELECT COUNT(*) FROM `".$this->table."` WHERE " . 
					"`".$this->fields["right"]."` < s.`".$this->fields["right"]."` AND " . 
					"`".$this->fields["left"]."` > s.`".$this->fields["left"]."` AND " . 
					"`".$this->fields["level"]."` = s.`".$this->fields["level"]."` + 1 AND ".
					"`".$this->fields["IDE_plans"]."` = ".$this->getIdePlans().
				") != " .
				"(SELECT COUNT(*) FROM `".$this->table."` WHERE " . 
					"`".$this->fields["parent_id"]."` = s.`".$this->fields["id"]."` AND 
					`".$this->fields["IDE_plans"]."` = ".$this->getIdePlans().
				") "
			);
		$this->db->nextr();
		$report[] = ($this->db->f(0) > 0) ? "[FAIL]\tAdjacency and nested set do not match." : "[OK]\tNS and AJ match";
 
		return implode("<br />",$report);
	}
 
	function _dump($output = false) {
		$nodes = array();
		$this->db->query("SELECT * FROM ".$this->table." 
							WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans()." 
							ORDER BY `".$this->fields["left"]."`");
		while($this->db->nextr()) $nodes[] = $this->db->get_row("assoc");
		if($output) {
			echo "<pre>";
			foreach($nodes as $node) {
				echo str_repeat(" ",(int)$node[$this->fields["level"]] * 2);
				echo $node[$this->fields["id"]]." (".$node[$this->fields["left"]].",".$node[$this->fields["right"]].",".$node[$this->fields["level"]].",".$node[$this->fields["parent_id"]].",".$node[$this->fields["position"]].")<br />";
			}
			echo str_repeat("-",40);
			echo "</pre>";
		}
		return $nodes;
	}
	function _drop() {
		//$this->db->query("TRUNCATE TABLE `".$this->table."`");
		/*$this->db->query("" . 
				"INSERT INTO `".$this->table."` (" . 
					"`".$this->fields["id"]."`, " . 
					"`".$this->fields["parent_id"]."`, " . 
					"`".$this->fields["position"]."`, " . 
					"`".$this->fields["left"]."`, " . 
					"`".$this->fields["right"]."`, " . 
					"`".$this->fields["level"]."` " . 
					") " . 
				"VALUES (" . 
					"1, " . 
					"0, " . 
					"0, " . 
					"1, " . 
					"2, " . 
					"0 ". 
				")");*/
	}
}
 
class json_tree extends _tree_struct { 
	function __construct($table = "plans_item", $fields = array(), $add_fields = array("title" => "title", "type" => "type")) {
		parent::__construct($table, $fields);
		$this->fields = array_merge($this->fields, $add_fields);
		$this->add_fields = $add_fields;
	}
 
	function create_node($data) {
		$id = parent::_create((int)$data[$this->fields["id"]], (int)$data[$this->fields["position"]]);
		if($id) {
			$data["id"] = $id;
			$this->set_data($data);
			return  "{ \"status\" : 1, \"id\" : ".(int)$id." }";
		}
		return "{ \"status\" : 0 }";
	}
	function set_data($data) {
		if(count($this->add_fields) == 0) { return "{ \"status\" : 1 }"; }
		$s = "UPDATE `".$this->table."` SET `".$this->fields["id"]."` = `".$this->fields["id"]."` "; 
		foreach($this->add_fields as $k => $v) {
			if(isset($data[$k]))	$s .= ", `".$this->fields[$v]."` = \"".$this->db->escape($data[$k])."\" ";
			else					$s .= ", `".$this->fields[$v]."` = `".$this->fields[$v]."` ";
		}
		$s .= "WHERE `".$this->fields["id"]."` = ".(int)$data["id"];
		$this->db->query($s);
		return "{ \"status\" : 1 }";
	}
	function rename_node($data) { return $this->set_data($data); }
 
	function move_node($data) { 
		$id = parent::_move((int)$data["id"], (int)$data["ref"], (int)$data["position"], (int)$data["copy"]);
		if(!$id) return "{ \"status\" : 0 }";
		if((int)$data["copy"] && count($this->add_fields)) {
			$ids	= array_keys($this->_get_children($id, true));
			$data	= $this->_get_children((int)$data["id"], true);
 
			$i = 0;
			foreach($data as $dk => $dv) {
				$s = "UPDATE `".$this->table."` SET `".$this->fields["id"]."` = `".$this->fields["id"]."` "; 
				foreach($this->add_fields as $k => $v) {
					if(isset($dv[$k]))	$s .= ", `".$this->fields[$v]."` = \"".$this->db->escape($dv[$k])."\" ";
					else				$s .= ", `".$this->fields[$v]."` = `".$this->fields[$v]."` ";
				}
				$s .= "WHERE `".$this->fields["id"]."` = ".$ids[$i];
				$this->db->query($s);
				$i++;
			}
		}
		return "{ \"status\" : 1, \"id\" : ".$id." }";
	}
	function remove_node($data) {
		$id = parent::_remove((int)$data["id"]);
		return "{ \"status\" : 1 }";
	}
	function get_children($data) {
		$tmp = $this->_get_children((int)$data["id"]);
		if((int)$data["id"] === 1 && count($tmp) === 0) {
			//$this->_create_default();
			$tmp = $this->_get_children((int)$data["id"]);
		}
		$result = array();
		if((int)$data["id"] === 0) return json_encode($result);
		foreach($tmp as $k => $v) {
			$result[] = array(
				"attr" => array("id" => "node_".$k, "rel" => $v[$this->fields["type"]]),
				"data" => $v[$this->fields["title"]],
				"state" => ((int)$v[$this->fields["right"]] - (int)$v[$this->fields["left"]] > 1) ? "closed" : ""
			);
		}
		return json_encode($result);
	}
	function search($data) {
		$this->db->query("SELECT `".$this->fields["left"]."`, `".$this->fields["right"]."` 
								FROM `".$this->table."` 
								WHERE `".$this->fields["title"]."` LIKE '%".$this->db->escape($data["search_str"])."%' 
								AND `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans());
		if($this->db->nf() === 0) return "[]";
		//$q = "SELECT DISTINCT `".$this->fields["id"]."` FROM `".$this->table."` WHERE 0 ";
		$q = "SELECT DISTINCT `".$this->fields["id"]."` FROM `".$this->table."` WHERE `".$this->fields["IDE_plans"]."` = ".$this->getIdePlans();
		while($this->db->nextr()) {
			$q .= " OR (`".$this->fields["left"]."` < ".(int)$this->db->f(0)." AND `".$this->fields["right"]."` > ".(int)$this->db->f(1).") ";
		}
		$result = array();
		$this->db->query($q);
		while($this->db->nextr()) { $result[] = "#node_".$this->db->f(0); }
		return json_encode($result);
	}
 
	function _create_default() {
		//$this->_drop();
		$this->create_node(array(
			"id" => 1,
			"position" => 0,
			"title" => "C:",
			"type" => "drive"
		));
		$this->create_node(array(
			"id" => 1,
			"position" => 1,
			"title" => "D:",
			"type" => "drive"
		));
		$this->create_node(array(
			"id" => 2,
			"position" => 0,
			"title" => "_demo",
			"type" => "folder"
		));
		$this->create_node(array(
			"id" => 2,
			"position" => 1,
			"title" => "_docs",
			"type" => "folder"
		));
		$this->create_node(array(
			"id" => 4,
			"position" => 0,
			"title" => "index.html",
			"type" => "default"
		));
		$this->create_node(array(
			"id" => 5,
			"position" => 1,
			"title" => "doc.html",
			"type" => "default"
		));
	}
}
 
?>

Bdd:

Code:

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DROP TABLE IF EXISTS `plans_item`;
CREATE TABLE IF NOT EXISTS `plans_item` (
  `id` int(10) unsigned NOT NULL auto_increment,
  `IDE_plans` int(10) unsigned default NULL,
  `parent_id` int(10) unsigned default NULL,
  `position` bigint(20) unsigned default NULL,
  `left` bigint(20) unsigned default NULL,
  `right` bigint(20) unsigned default NULL,
  `level` bigint(20) unsigned default NULL,
  `title` varchar(255) default NULL COMMENT 'Intitulé pour 1 item',
  `type` varchar(255) default NULL COMMENT 'type pour affichage icone',
  `type_item` varchar(255) default NULL COMMENT 'type pour item: catégorie || terme',
  `muid` int(10) unsigned default NULL,
  `mtime` timestamp NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
  `cuid` int(10) unsigned default NULL,
  `ctime` timestamp NULL default '0000-00-00 00:00:00',
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COMMENT='Items des plans de lecture' AUTO_INCREMENT=10 ;
 
--
-- Contenu de la table `plans_item`
--
 
INSERT INTO `plans_item` (`IDE_plans`, `parent_id`, `position`, `left`, `right`, `level`, `title`, `type`, `type_item`, `muid`, `mtime`, `cuid`, `ctime`) VALUES
( 3, 0, 0, 1, 18, 0, NULL, NULL, NULL, NULL, '2011-09-12 14:21:49', NULL, '0000-00-00 00:00:00'),
(3, 1, 0, 2, 3, 1, 'Esthétique et critique', 'folder', 'Fragment', 90, '2011-09-12 14:56:10', 90, '2011-09-12 14:21:40'),
( 3, 1, 1, 4, 17, 1, 'Histoire et idées scientifiques', 'folder', 'Fragment', 90, '2011-09-12 14:56:10', 90, '2011-09-12 14:21:40'),
(3, 2, 0, 5, 10, 2, 'Esthétique', 'folder', 'Fragment', 90, '2011-09-12 14:56:59', 90, '2011-09-12 14:21:49'),
(3, 2, 1, 11, 16, 2, 'Critique', 'folder', 'Fragment', 90, '2011-09-12 14:59:06', 90, '2011-09-12 14:21:49'),
(3, 3, 0, 6, 7, 3, "Contradictions de l'histoire", 'folder', 'Fragment', 90, '2011-09-12 14:32:34', 90, '2011-09-12 14:21:49'),
(3, 3, 1, 8, 9, 2, 'Idées scientifiques', 'default', 'Fragment', 90, '2011-09-12 15:06:43', 90, '2011-09-12 14:21:49'),
(3, 3, 2, 12, 13, 2, "Histoire", 'default', 'Fragment', 90, '2011-09-12 15:25:16', 90, '2011-09-12 14:47:00');
 
INSERT INTO `plans_item` (`ID`, `IDE_plans`, `parent_id`, `position`, `left`, `right`, `level`, `title`, `type`, `type_item`, `muid`, `mtime`, `cuid`, `ctime`) VALUES
(9, 1, 0, 0, 1, 18, 0, NULL, NULL, NULL, NULL, '2011-09-12 14:21:49', NULL, '0000-00-00 00:00:00'),
(10, 1, 9, 0, 2, 3, 1, 'manu rentre chez toi', 'folder', 'Fragment', 90, '2011-09-12 14:56:10', 90, '2011-09-12 14:21:40'),
(11, 1, 9, 1, 4, 17, 1, 'je pensais même que soufrir, ça pouvait pas arriver', 'folder', 'Fragment', 90, '2011-09-12 14:56:10', 90, '2011-09-12 14:21:40'),
(12, 1, 10, 0, 5, 10, 2, 'Les copains qui reviennent', 'folder', 'Fragment', 90, '2011-09-12 14:56:59', 90, '2011-09-12 14:21:49'),
(13, 1, 10, 1, 11, 16, 2, 'une gonzesse de perdue', 'folder', 'Fragment', 90, '2011-09-12 14:59:06', 90, '2011-09-12 14:21:49'),
(14, 1, 11, 0, 6, 7, 3, "Déconne pas Manu", 'folder', 'Fragment', 90, '2011-09-12 14:32:34', 90, '2011-09-12 14:21:49'),
(15, 1, 11, 1, 8, 9, 2, 'elle a mis sur le mur', 'default', 'Fragment', 90, '2011-09-12 15:06:43', 90, '2011-09-12 14:21:49'),
(16, 1, 11, 2, 12, 13, 2, "une photo de Rimbaud", 'default', 'Fragment', 90, '2011-09-12 15:25:16', 90, '2011-09-12 14:47:00');

Résultat, pour l'instant:
pour mon plan 3 (IDE_plans=3), l'arbre s'affiche sans problème.
Pour les autres valeurs (IDE_plans=1), l'arbre n'est pas affiché.

Merci à tous ceux qui auront pris la peine de lire tout cela.