From e44a7e37b6c7b5961adaffc62b9042b8d442938e Mon Sep 17 00:00:00 2001
From: mensonge
Date: Thu, 13 Nov 2008 09:49:11 +0000
Subject: New feature: basic Ajax suggestion for tags and implementation of
 Dojo toolkit

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
---
 includes/js/dijit/Tree.js | 1336 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1336 insertions(+)
 create mode 100644 includes/js/dijit/Tree.js

(limited to 'includes/js/dijit/Tree.js')

diff --git a/includes/js/dijit/Tree.js b/includes/js/dijit/Tree.js
new file mode 100644
index 0000000..fc9be8b
--- /dev/null
+++ b/includes/js/dijit/Tree.js
@@ -0,0 +1,1336 @@
+if(!dojo._hasResource["dijit.Tree"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dijit.Tree"] = true;
+dojo.provide("dijit.Tree");
+
+dojo.require("dojo.fx");
+
+dojo.require("dijit._Widget");
+dojo.require("dijit._Templated");
+dojo.require("dijit._Container");
+dojo.require("dojo.cookie");
+
+dojo.declare(
+	"dijit._TreeNode",
+	[dijit._Widget, dijit._Templated, dijit._Container, dijit._Contained],
+{
+	// summary
+	//		Single node within a tree
+
+	// item: dojo.data.Item
+	//		the dojo.data entry this tree represents
+	item: null,	
+
+	isTreeNode: true,
+
+	// label: String
+	//		Text of this tree node
+	label: "",
+	
+	isExpandable: null, // show expando node
+	
+	isExpanded: false,
+
+	// state: String
+	//		dynamic loading-related stuff.
+	//		When an empty folder node appears, it is "UNCHECKED" first,
+	//		then after dojo.data query it becomes "LOADING" and, finally "LOADED"	
+	state: "UNCHECKED",
+	
+	templateString:"<div class=\"dijitTreeNode\" waiRole=\"presentation\"\n\t><div dojoAttachPoint=\"rowNode\" waiRole=\"presentation\"\n\t\t><span dojoAttachPoint=\"expandoNode\" class=\"dijitTreeExpando\" waiRole=\"presentation\"\n\t\t></span\n\t\t><span dojoAttachPoint=\"expandoNodeText\" class=\"dijitExpandoText\" waiRole=\"presentation\"\n\t\t></span\n\t\t><div dojoAttachPoint=\"contentNode\" class=\"dijitTreeContent\" waiRole=\"presentation\">\n\t\t\t<div dojoAttachPoint=\"iconNode\" class=\"dijitInline dijitTreeIcon\" waiRole=\"presentation\"></div>\n\t\t\t<span dojoAttachPoint=\"labelNode\" class=\"dijitTreeLabel\" wairole=\"treeitem\" tabindex=\"-1\" waiState=\"selected-false\" dojoAttachEvent=\"onfocus:_onNodeFocus\"></span>\n\t\t</div\n\t></div>\n</div>\n",		
+
+	postCreate: function(){
+		// set label, escaping special characters
+		this.setLabelNode(this.label);
+
+		// set expand icon for leaf
+		this._setExpando();
+
+		// set icon and label class based on item
+		this._updateItemClasses(this.item);
+
+		if(this.isExpandable){
+			dijit.setWaiState(this.labelNode, "expanded", this.isExpanded);
+		}
+	},
+
+	markProcessing: function(){
+		// summary: visually denote that tree is loading data, etc.
+		this.state = "LOADING";
+		this._setExpando(true);	
+	},
+
+	unmarkProcessing: function(){
+		// summary: clear markup from markProcessing() call
+		this._setExpando(false);	
+	},
+
+	_updateItemClasses: function(item){
+		// summary: set appropriate CSS classes for icon and label dom node (used to allow for item updates to change respective CSS)
+		var tree = this.tree, model = tree.model;
+		if(tree._v10Compat && item === model.root){
+			// For back-compat with 1.0, need to use null to specify root item (TODO: remove in 2.0)
+			item = null;
+		}
+		this.iconNode.className = "dijitInline dijitTreeIcon " + tree.getIconClass(item, this.isExpanded);
+		this.labelNode.className = "dijitTreeLabel " + tree.getLabelClass(item, this.isExpanded);
+	},
+
+	_updateLayout: function(){
+		// summary: set appropriate CSS classes for this.domNode
+		var parent = this.getParent();
+		if(!parent || parent.rowNode.style.display == "none"){
+			/* if we are hiding the root node then make every first level child look like a root node */
+			dojo.addClass(this.domNode, "dijitTreeIsRoot");
+		}else{
+			dojo.toggleClass(this.domNode, "dijitTreeIsLast", !this.getNextSibling());
+		}
+	},
+
+	_setExpando: function(/*Boolean*/ processing){
+		// summary: set the right image for the expando node
+
+		// apply the appropriate class to the expando node
+		var styles = ["dijitTreeExpandoLoading", "dijitTreeExpandoOpened",
+			"dijitTreeExpandoClosed", "dijitTreeExpandoLeaf"];
+		var idx = processing ? 0 : (this.isExpandable ?	(this.isExpanded ? 1 : 2) : 3);
+		dojo.forEach(styles,
+			function(s){
+				dojo.removeClass(this.expandoNode, s);
+			}, this
+		);
+		dojo.addClass(this.expandoNode, styles[idx]);
+
+		// provide a non-image based indicator for images-off mode
+		this.expandoNodeText.innerHTML =
+			processing ? "*" :
+				(this.isExpandable ?
+					(this.isExpanded ? "-" : "+") : "*");
+	},	
+
+	expand: function(){
+		// summary: show my children
+		if(this.isExpanded){ return; }
+		// cancel in progress collapse operation
+		if(this._wipeOut.status() == "playing"){
+			this._wipeOut.stop();
+		}
+
+		this.isExpanded = true;
+		dijit.setWaiState(this.labelNode, "expanded", "true");
+		dijit.setWaiRole(this.containerNode, "group");
+		this.contentNode.className = "dijitTreeContent dijitTreeContentExpanded";
+		this._setExpando();
+		this._updateItemClasses(this.item);
+
+		this._wipeIn.play();
+	},
+
+	collapse: function(){					
+		if(!this.isExpanded){ return; }
+
+		// cancel in progress expand operation
+		if(this._wipeIn.status() == "playing"){
+			this._wipeIn.stop();
+		}
+
+		this.isExpanded = false;
+		dijit.setWaiState(this.labelNode, "expanded", "false");
+		this.contentNode.className = "dijitTreeContent";
+		this._setExpando();
+		this._updateItemClasses(this.item);
+
+		this._wipeOut.play();
+	},
+
+	setLabelNode: function(label){
+		this.labelNode.innerHTML="";
+		this.labelNode.appendChild(dojo.doc.createTextNode(label));
+	},
+
+	setChildItems: function(/* Object[] */ items){
+		// summary:
+		//		Sets the child items of this node, removing/adding nodes
+		//		from current children to match specified items[] array.
+
+		var tree = this.tree,
+			model = tree.model;
+
+		// Orphan all my existing children.
+		// If items contains some of the same items as before then we will reattach them.
+		// Don't call this.removeChild() because that will collapse the tree etc.
+		this.getChildren().forEach(function(child){
+			dijit._Container.prototype.removeChild.call(this, child);
+		}, this);
+
+		this.state = "LOADED";
+
+		if(items && items.length > 0){
+			this.isExpandable = true;
+			if(!this.containerNode){ // maybe this node was unfolderized and still has container
+				this.containerNode = this.tree.containerNodeTemplate.cloneNode(true);
+				this.domNode.appendChild(this.containerNode);
+			}
+
+			// Create _TreeNode widget for each specified tree node, unless one already
+			// exists and isn't being used (presumably it's from a DnD move and was recently
+			// released
+			dojo.forEach(items, function(item){
+				var id = model.getIdentity(item),
+					existingNode = tree._itemNodeMap[id],
+					node = 
+						( existingNode && !existingNode.getParent() ) ?
+						existingNode :
+						new dijit._TreeNode({
+							item: item,
+							tree: tree,
+							isExpandable: model.mayHaveChildren(item),
+							label: tree.getLabel(item)
+						});
+				this.addChild(node);
+				// note: this won't work if there are two nodes for one item (multi-parented items); will be fixed later
+				tree._itemNodeMap[id] = node;
+				if(this.tree.persist){
+					if(tree._openedItemIds[id]){
+						tree._expandNode(node);
+					}
+				}
+			}, this);
+
+			// note that updateLayout() needs to be called on each child after
+			// _all_ the children exist
+			dojo.forEach(this.getChildren(), function(child, idx){
+				child._updateLayout();
+			});
+		}else{
+			this.isExpandable=false;
+		}
+
+		if(this._setExpando){
+			// change expando to/from dot or + icon, as appropriate
+			this._setExpando(false);
+		}
+
+		// On initial tree show, put focus on either the root node of the tree,
+		// or the first child, if the root node is hidden
+		if(!this.parent){
+			var fc = this.tree.showRoot ? this : this.getChildren()[0],
+				tabnode = fc ? fc.labelNode : this.domNode;
+			tabnode.setAttribute("tabIndex", "0");
+		}
+
+		// create animations for showing/hiding the children (if children exist)
+		if(this.containerNode && !this._wipeIn){
+			this._wipeIn = dojo.fx.wipeIn({node: this.containerNode, duration: 150});
+			this._wipeOut = dojo.fx.wipeOut({node: this.containerNode, duration: 150});
+		}
+	},
+
+	removeChild: function(/* treeNode */ node){
+		this.inherited(arguments);
+
+		var children = this.getChildren();		
+		if(children.length == 0){
+			this.isExpandable = false;
+			this.collapse();
+		}
+
+		dojo.forEach(children, function(child){
+				child._updateLayout();
+		});
+	},
+
+	makeExpandable: function(){
+		//summary
+		//		if this node wasn't already showing the expando node,
+		//		turn it into one and call _setExpando()
+		this.isExpandable = true;
+		this._setExpando(false);
+	},
+
+	_onNodeFocus: function(evt){
+		var node = dijit.getEnclosingWidget(evt.target);
+		this.tree._onTreeFocus(node);
+	}
+});
+
+dojo.declare(
+	"dijit.Tree",
+	[dijit._Widget, dijit._Templated],
+{
+	// summary
+	//	This widget displays hierarchical data from a store.  A query is specified
+	//	to get the "top level children" from a data store, and then those items are
+	//	queried for their children and so on (but lazily, as the user clicks the expand node).
+	//
+	//	Thus in the default mode of operation this widget is technically a forest, not a tree,
+	//	in that there can be multiple "top level children".  However, if you specify label,
+	//	then a special top level node (not corresponding to any item in the datastore) is
+	//	created, to father all the top level children.
+
+	// store: String||dojo.data.Store
+	//	The store to get data to display in the tree.
+	//	May remove for 2.0 in favor of "model".
+	store: null,
+
+	// model: dijit.Tree.model
+	//	Alternate interface from store to access data (and changes to data) in the tree
+	model: null,
+
+	// query: anything
+	//	Specifies datastore query to return the root item for the tree.
+	//
+	//	Deprecated functionality: if the query returns multiple items, the tree is given
+	//	a fake root node (not corresponding to any item in the data store), 
+	//	whose children are the items that match this query.
+	//
+	//	The root node is shown or hidden based on whether a label is specified.
+	//
+	//	Having a query return multiple items is deprecated.
+	//	If your store doesn't have a root item, wrap the store with
+	//	dijit.tree.ForestStoreModel, and specify model=myModel
+	//
+	// example:
+	//		{type:'continent'}
+	query: null,
+
+	// label: String
+	//	Deprecated.  Use dijit.tree.ForestStoreModel directly instead.
+	//	Used in conjunction with query parameter.
+	//	If a query is specified (rather than a root node id), and a label is also specified,
+	//	then a fake root node is created and displayed, with this label.
+	label: "",
+
+	// showRoot: Boolean
+	//	Should the root node be displayed, or hidden?
+	showRoot: true,
+
+	// childrenAttr: String[]
+	//		one ore more attributes that holds children of a tree node
+	childrenAttr: ["children"],
+
+	// openOnClick: Boolean
+	//		If true, clicking a folder node's label will open it, rather than calling onClick()
+	openOnClick: false,
+
+	templateString:"<div class=\"dijitTreeContainer\" waiRole=\"tree\"\n\tdojoAttachEvent=\"onclick:_onClick,onkeypress:_onKeyPress\">\n</div>\n",		
+
+	isExpandable: true,
+
+	isTree: true,
+
+	// persist: Boolean
+	//	enables/disables use of cookies for state saving.
+	persist: true,
+	
+	// dndController: String
+	//	class name to use as as the dnd controller
+	dndController: null,
+
+	//parameters to pull off of the tree and pass on to the dndController as its params
+	dndParams: ["onDndDrop","itemCreator","onDndCancel","checkAcceptance", "checkItemAcceptance"],
+
+	//declare the above items so they can be pulled from the tree's markup
+	onDndDrop:null,
+	itemCreator:null,
+	onDndCancel:null,
+	checkAcceptance:null,	
+	checkItemAcceptance:null,
+
+	_publish: function(/*String*/ topicName, /*Object*/ message){
+		// summary:
+		//		Publish a message for this widget/topic
+		dojo.publish(this.id, [dojo.mixin({tree: this, event: topicName}, message||{})]);
+	},
+
+	postMixInProperties: function(){
+		this.tree = this;
+
+		this._itemNodeMap={};
+
+		if(!this.cookieName){
+			this.cookieName = this.id + "SaveStateCookie";
+		}
+	},
+
+	postCreate: function(){
+		// load in which nodes should be opened automatically
+		if(this.persist){
+			var cookie = dojo.cookie(this.cookieName);
+			this._openedItemIds = {};
+			if(cookie){
+				dojo.forEach(cookie.split(','), function(item){
+					this._openedItemIds[item] = true;
+				}, this);
+			}
+		}
+		
+		// make template for container node (we will clone this and insert it into
+		// any nodes that have children)
+		var div = dojo.doc.createElement('div');
+		div.style.display = 'none';
+		div.className = "dijitTreeContainer";	
+		dijit.setWaiRole(div, "presentation");
+		this.containerNodeTemplate = div;
+
+		// Create glue between store and Tree, if not specified directly by user
+		if(!this.model){
+			this._store2model();
+		}
+
+		// monitor changes to items
+		this.connect(this.model, "onChange", "_onItemChange");
+		this.connect(this.model, "onChildrenChange", "_onItemChildrenChange");
+		// TODO: monitor item deletes so we don't end up w/orphaned nodes?
+
+		this._load();
+
+		this.inherited("postCreate", arguments);
+
+		if(this.dndController){
+			if(dojo.isString(this.dndController)){
+				this.dndController= dojo.getObject(this.dndController);
+			}	
+			var params={};
+			for (var i=0; i<this.dndParams.length;i++){
+				if(this[this.dndParams[i]]){
+					params[this.dndParams[i]]=this[this.dndParams[i]];
+				}
+			}
+			this.dndController= new this.dndController(this, params);
+		}
+	},
+
+	_store2model: function(){
+		// summary: user specified a store&query rather than model, so create model from store/query
+		this._v10Compat = true;
+		dojo.deprecated("Tree: from version 2.0, should specify a model object rather than a store/query");
+
+		var modelParams = {
+			id: this.id + "_ForestStoreModel",
+			store: this.store,
+			query: this.query,
+			childrenAttrs: this.childrenAttr
+		};
+
+		// Only override the model's mayHaveChildren() method if the user has specified an override
+		if(this.params.mayHaveChildren){
+			modelParams.mayHaveChildren = dojo.hitch(this, "mayHaveChildren");
+		}
+					
+		if(this.params.getItemChildren){
+			modelParams.getChildren = dojo.hitch(this, function(item, onComplete, onError){
+				this.getItemChildren((this._v10Compat && item === this.model.root) ? null : item, onComplete, onError);
+			});
+		}
+		this.model = new dijit.tree.ForestStoreModel(modelParams);
+		
+		// For backwards compatibility, the visibility of the root node is controlled by
+		// whether or not the user has specified a label
+		this.showRoot = Boolean(this.label);
+	},
+
+	_load: function(){
+		// summary: initial load of the tree
+		// load root node (possibly hidden) and it's children
+		this.model.getRoot(
+			dojo.hitch(this, function(item){
+				var rn = this.rootNode = new dijit._TreeNode({
+					item: item,
+					tree: this,
+					isExpandable: true,
+					label: this.label || this.getLabel(item)
+				});
+				if(!this.showRoot){
+					rn.rowNode.style.display="none";
+				}
+				this.domNode.appendChild(rn.domNode);
+				this._itemNodeMap[this.model.getIdentity(item)] = rn;
+
+				rn._updateLayout();		// sets "dijitTreeIsRoot" CSS classname
+
+				// load top level children
+				this._expandNode(rn);
+			}),
+			function(err){
+				console.error(this, ": error loading root: ", err);
+			}
+		);
+	},
+
+	////////////// Data store related functions //////////////////////
+	// These just get passed to the model; they are here for back-compat
+
+	mayHaveChildren: function(/*dojo.data.Item*/ item){
+		// summary
+		//		User overridable function to tell if an item has or may have children.
+		//		Controls whether or not +/- expando icon is shown.
+		//		(For efficiency reasons we may not want to check if an element actually
+		//		has children until user clicks the expando node)
+	},
+
+	getItemChildren: function(/*dojo.data.Item*/ parentItem, /*function(items)*/ onComplete){
+		// summary
+		// 		User overridable function that return array of child items of given parent item,
+		//		or if parentItem==null then return top items in tree
+	},
+
+	///////////////////////////////////////////////////////
+	// Functions for converting an item to a TreeNode
+	getLabel: function(/*dojo.data.Item*/ item){
+		// summary: user overridable function to get the label for a tree node (given the item)
+		return this.model.getLabel(item);	// String
+	},
+
+	getIconClass: function(/*dojo.data.Item*/ item, /*Boolean*/ opened){
+		// summary: user overridable function to return CSS class name to display icon
+		return (!item || this.model.mayHaveChildren(item)) ? (opened ? "dijitFolderOpened" : "dijitFolderClosed") : "dijitLeaf"
+	},
+
+	getLabelClass: function(/*dojo.data.Item*/ item, /*Boolean*/ opened){
+		// summary: user overridable function to return CSS class name to display label
+	},
+
+	/////////// Keyboard and Mouse handlers ////////////////////
+
+	_onKeyPress: function(/*Event*/ e){
+		// summary: translates keypress events into commands for the controller
+		if(e.altKey){ return; }
+		var treeNode = dijit.getEnclosingWidget(e.target);
+		if(!treeNode){ return; }
+
+		// Note: On IE e.keyCode is not 0 for printables so check e.charCode.
+		// In dojo charCode is universally 0 for non-printables.
+		if(e.charCode){  // handle printables (letter navigation)
+			// Check for key navigation.
+			var navKey = e.charCode;
+			if(!e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey){
+				navKey = (String.fromCharCode(navKey)).toLowerCase();
+				this._onLetterKeyNav( { node: treeNode, key: navKey } );
+				dojo.stopEvent(e);
+			}
+		}else{  // handle non-printables (arrow keys)
+			var map = this._keyHandlerMap;
+			if(!map){
+				// setup table mapping keys to events
+				map = {};
+				map[dojo.keys.ENTER]="_onEnterKey";
+				map[this.isLeftToRight() ? dojo.keys.LEFT_ARROW : dojo.keys.RIGHT_ARROW]="_onLeftArrow";
+				map[this.isLeftToRight() ? dojo.keys.RIGHT_ARROW : dojo.keys.LEFT_ARROW]="_onRightArrow";
+				map[dojo.keys.UP_ARROW]="_onUpArrow";
+				map[dojo.keys.DOWN_ARROW]="_onDownArrow";
+				map[dojo.keys.HOME]="_onHomeKey";
+				map[dojo.keys.END]="_onEndKey";
+				this._keyHandlerMap = map;
+			}
+			if(this._keyHandlerMap[e.keyCode]){
+				this[this._keyHandlerMap[e.keyCode]]( { node: treeNode, item: treeNode.item } );	
+				dojo.stopEvent(e);
+			}
+		}
+	},
+
+	_onEnterKey: function(/*Object*/ message){
+		this._publish("execute", { item: message.item, node: message.node} );
+		this.onClick(message.item, message.node);
+	},
+
+	_onDownArrow: function(/*Object*/ message){
+		// summary: down arrow pressed; get next visible node, set focus there
+		var node = this._getNextNode(message.node);
+		if(node && node.isTreeNode){
+			this.focusNode(node);
+		}	
+	},
+
+	_onUpArrow: function(/*Object*/ message){
+		// summary: up arrow pressed; move to previous visible node
+
+		var node = message.node;
+
+		// if younger siblings		
+		var previousSibling = node.getPreviousSibling();
+		if(previousSibling){
+			node = previousSibling;
+			// if the previous node is expanded, dive in deep
+			while(node.isExpandable && node.isExpanded && node.hasChildren()){
+				// move to the last child
+				var children = node.getChildren();
+				node = children[children.length-1];
+			}
+		}else{
+			// if this is the first child, return the parent
+			// unless the parent is the root of a tree with a hidden root
+			var parent = node.getParent();
+			if(!(!this.showRoot && parent === this.rootNode)){
+				node = parent;
+			}
+		}
+
+		if(node && node.isTreeNode){
+			this.focusNode(node);
+		}
+	},
+
+	_onRightArrow: function(/*Object*/ message){
+		// summary: right arrow pressed; go to child node
+		var node = message.node;
+
+		// if not expanded, expand, else move to 1st child
+		if(node.isExpandable && !node.isExpanded){
+			this._expandNode(node);
+		}else if(node.hasChildren()){
+			node = node.getChildren()[0];
+			if(node && node.isTreeNode){
+				this.focusNode(node);
+			}
+		}
+	},
+
+	_onLeftArrow: function(/*Object*/ message){
+		// summary:
+		//		Left arrow pressed.
+		//		If not collapsed, collapse, else move to parent.
+
+		var node = message.node;
+
+		if(node.isExpandable && node.isExpanded){
+			this._collapseNode(node);
+		}else{
+			node = node.getParent();
+			if(node && node.isTreeNode){
+				this.focusNode(node);
+			}
+		}
+	},
+
+	_onHomeKey: function(){
+		// summary: home pressed; get first visible node, set focus there
+		var node = this._getRootOrFirstNode();
+		if(node){
+			this.focusNode(node);
+		}
+	},
+
+	_onEndKey: function(/*Object*/ message){
+		// summary: end pressed; go to last visible node
+
+		var node = this;
+		while(node.isExpanded){
+			var c = node.getChildren();
+			node = c[c.length - 1];
+		}
+
+		if(node && node.isTreeNode){
+			this.focusNode(node);
+		}
+	},
+
+	_onLetterKeyNav: function(message){
+		// summary: letter key pressed; search for node starting with first char = key
+		var node = startNode = message.node,
+			key = message.key;
+		do{
+			node = this._getNextNode(node);
+			//check for last node, jump to first node if necessary
+			if(!node){
+				node = this._getRootOrFirstNode();
+			}
+		}while(node !== startNode && (node.label.charAt(0).toLowerCase() != key));
+		if(node && node.isTreeNode){
+			// no need to set focus if back where we started
+			if(node !== startNode){
+				this.focusNode(node);
+			}
+		}
+	},
+
+	_onClick: function(/*Event*/ e){
+		// summary: translates click events into commands for the controller to process
+		var domElement = e.target;
+
+		// find node
+		var nodeWidget = dijit.getEnclosingWidget(domElement);	
+		if(!nodeWidget || !nodeWidget.isTreeNode){
+			return;
+		}
+
+		if( (this.openOnClick && nodeWidget.isExpandable) ||
+			(domElement == nodeWidget.expandoNode || domElement == nodeWidget.expandoNodeText) ){
+			// expando node was clicked, or label of a folder node was clicked; open it
+			if(nodeWidget.isExpandable){
+				this._onExpandoClick({node:nodeWidget});
+			}
+		}else{
+			this._publish("execute", { item: nodeWidget.item, node: nodeWidget} );
+			this.onClick(nodeWidget.item, nodeWidget);
+			this.focusNode(nodeWidget);
+		}
+		dojo.stopEvent(e);
+	},
+
+	_onExpandoClick: function(/*Object*/ message){
+		// summary: user clicked the +/- icon; expand or collapse my children.
+		var node = message.node;
+		
+		// If we are collapsing, we might be hiding the currently focused node.
+		// Also, clicking the expando node might have erased focus from the current node.
+		// For simplicity's sake just focus on the node with the expando.
+		this.focusNode(node);
+
+		if(node.isExpanded){
+			this._collapseNode(node);
+		}else{
+			this._expandNode(node);
+		}
+	},
+
+	onClick: function(/* dojo.data */ item, /*TreeNode*/ node){
+		// summary: user overridable function for executing a tree item
+	},
+
+	_getNextNode: function(node){
+		// summary: get next visible node
+
+		if(node.isExpandable && node.isExpanded && node.hasChildren()){
+			// if this is an expanded node, get the first child
+			return node.getChildren()[0];		// _TreeNode	
+		}else{
+			// find a parent node with a sibling
+			while(node && node.isTreeNode){
+				var returnNode = node.getNextSibling();
+				if(returnNode){
+					return returnNode;		// _TreeNode
+				}
+				node = node.getParent();
+			}
+			return null;
+		}
+	},
+
+	_getRootOrFirstNode: function(){
+		// summary: get first visible node
+		return this.showRoot ? this.rootNode : this.rootNode.getChildren()[0];
+	},
+
+	_collapseNode: function(/*_TreeNode*/ node){
+		// summary: called when the user has requested to collapse the node
+
+		if(node.isExpandable){
+			if(node.state == "LOADING"){
+				// ignore clicks while we are in the process of loading data
+				return;
+			}
+
+			node.collapse();
+			if(this.persist && node.item){
+				delete this._openedItemIds[this.model.getIdentity(node.item)];
+				this._saveState();
+			}
+		}
+	},
+
+	_expandNode: function(/*_TreeNode*/ node){
+		// summary: called when the user has requested to expand the node
+
+		if(!node.isExpandable){
+			return;
+		}
+
+		var model = this.model,
+			item = node.item;
+
+		switch(node.state){
+			case "LOADING":
+				// ignore clicks while we are in the process of loading data
+				return;
+
+			case "UNCHECKED":
+				// need to load all the children, and then expand
+				node.markProcessing();
+				var _this = this;
+				model.getChildren(item, function(items){
+						node.unmarkProcessing();
+						node.setChildItems(items);
+						_this._expandNode(node);
+					},
+					function(err){
+						console.error(_this, ": error loading root children: ", err);
+					});
+				break;
+
+			default:
+				// data is already loaded; just proceed
+				node.expand();
+				if(this.persist && item){
+					this._openedItemIds[model.getIdentity(item)] = true;
+					this._saveState();
+				}
+		}
+	},
+
+	////////////////// Miscellaneous functions ////////////////
+
+	blurNode: function(){
+		// summary
+		//	Removes focus from the currently focused node (which must be visible).
+		//	Usually not called directly (just call focusNode() on another node instead)
+		var node = this.lastFocused;
+		if(!node){ return; }
+		var labelNode = node.labelNode;
+		dojo.removeClass(labelNode, "dijitTreeLabelFocused");
+		labelNode.setAttribute("tabIndex", "-1");
+		dijit.setWaiState(labelNode, "selected", false);
+		this.lastFocused = null;
+	},
+
+	focusNode: function(/* _tree.Node */ node){
+		// summary
+		//	Focus on the specified node (which must be visible)
+
+		// set focus so that the label will be voiced using screen readers
+		node.labelNode.focus();
+	},
+
+	_onBlur: function(){
+		// summary:
+		// 		We've moved away from the whole tree.  The currently "focused" node
+		//		(see focusNode above) should remain as the lastFocused node so we can
+		//		tab back into the tree.  Just change CSS to get rid of the dotted border
+		//		until that time
+
+		this.inherited(arguments);
+		if(this.lastFocused){
+			var labelNode = this.lastFocused.labelNode;
+			dojo.removeClass(labelNode, "dijitTreeLabelFocused");	
+		}
+	},
+
+	_onTreeFocus: function(/*Widget*/ node){
+		// summary:
+		//		called from onFocus handler of treeitem labelNode to set styles, wai state and tabindex
+		//		for currently focused treeitem.
+		
+		if (node){
+			if(node != this.lastFocused){
+				this.blurNode();
+			}
+			var labelNode = node.labelNode;
+			// set tabIndex so that the tab key can find this node
+			labelNode.setAttribute("tabIndex", "0");
+			dijit.setWaiState(labelNode, "selected", true);
+			dojo.addClass(labelNode, "dijitTreeLabelFocused");
+			this.lastFocused = node;
+		}
+	},
+
+	//////////////// Events from the model //////////////////////////
+	
+	_onItemDelete: function(/*Object*/ item){
+		//summary: delete event from the store
+		// TODO: currently this isn't called, and technically doesn't need to be,
+		// but it would help with garbage collection
+
+		var identity = this.model.getIdentity(item);
+		var node = this._itemNodeMap[identity];
+
+		if(node){
+			var parent = node.getParent();
+			if(parent){
+				// if node has not already been orphaned from a _onSetItem(parent, "children", ..) call...
+				parent.removeChild(node);
+			}
+			delete this._itemNodeMap[identity];
+			node.destroyRecursive();
+		}
+	},
+
+	_onItemChange: function(/*Item*/ item){
+		//summary: set data event on an item in the store
+		var model = this.model,
+			identity = model.getIdentity(item),
+			node = this._itemNodeMap[identity];
+
+		if(node){
+			node.setLabelNode(this.getLabel(item));
+			node._updateItemClasses(item);
+		}
+	},
+
+	_onItemChildrenChange: function(/*dojo.data.Item*/ parent, /*dojo.data.Item[]*/ newChildrenList){
+		//summary: set data event on an item in the store
+		var model = this.model,
+			identity = model.getIdentity(parent),
+			parentNode = this._itemNodeMap[identity];
+
+		if(parentNode){
+			parentNode.setChildItems(newChildrenList);
+		}
+	},
+
+	/////////////// Miscellaneous funcs
+	
+	_saveState: function(){
+		//summary: create and save a cookie with the currently expanded nodes identifiers
+		if(!this.persist){
+			return;
+		}
+		var ary = [];
+		for(var id in this._openedItemIds){
+			ary.push(id);
+		}
+		dojo.cookie(this.cookieName, ary.join(","));
+	},
+
+	destroy: function(){
+		if(this.rootNode){
+			this.rootNode.destroyRecursive();
+		}
+		this.rootNode = null;
+		this.inherited(arguments);
+	},
+	
+	destroyRecursive: function(){
+		// A tree is treated as a leaf, not as a node with children (like a grid),
+		// but defining destroyRecursive for back-compat.
+		this.destroy();
+	}
+});
+
+
+dojo.declare(
+	"dijit.tree.TreeStoreModel",
+	null,
+{
+	// summary
+	//		Implements dijit.Tree.model connecting to a store with a single
+	//		root item.  Any methods passed into the constructor will override
+	//		the ones defined here.
+
+	// store: dojo.data.Store
+	//		Underlying store
+	store: null,
+
+	// childrenAttrs: String[]
+	//		one ore more attributes that holds children of a tree node
+	childrenAttrs: ["children"],
+	
+	// root: dojo.data.Item
+	//		Pointer to the root item (read only, not a parameter)
+	root: null,
+
+	// query: anything
+	//		Specifies datastore query to return the root item for the tree.
+	//		Must only return a single item.   Alternately can just pass in pointer
+	//		to root item.
+	// example:
+	//		{id:'ROOT'}
+	query: null,
+
+	constructor: function(/* Object */ args){
+		// summary: passed the arguments listed above (store, etc)
+		dojo.mixin(this, args);
+
+		this.connects = [];
+
+		var store = this.store;
+		if(!store.getFeatures()['dojo.data.api.Identity']){
+			throw new Error("dijit.Tree: store must support dojo.data.Identity");			
+		}
+
+		// if the store supports Notification, subscribe to the notification events
+		if(store.getFeatures()['dojo.data.api.Notification']){
+			this.connects = this.connects.concat([
+				dojo.connect(store, "onNew", this, "_onNewItem"),
+				dojo.connect(store, "onDelete", this, "_onDeleteItem"),
+				dojo.connect(store, "onSet", this, "_onSetItem")
+			]);
+		}
+	},
+
+	destroy: function(){
+		dojo.forEach(this.connects, dojo.disconnect);
+	},
+
+	// =======================================================================
+	// Methods for traversing hierarchy
+
+	getRoot: function(onItem, onError){
+		// summary:
+		//		Calls onItem with the root item for the tree, possibly a fabricated item.
+		//		Calls onError on error.
+		if(this.root){
+			onItem(this.root);
+		}else{
+			this.store.fetch({
+				query: this.query,
+				onComplete: dojo.hitch(this, function(items){
+					if(items.length != 1){
+						throw new Error(this.declaredClass + ": query " + query + " returned " + items.length +
+						 	" items, but must return exactly one item");
+					}
+					this.root = items[0];
+					onItem(this.root);
+				}),
+				onError: onError
+			});
+		}
+	},
+
+	mayHaveChildren: function(/*dojo.data.Item*/ item){
+		// summary
+		//		Tells if an item has or may have children.  Implementing logic here
+		//		avoids showing +/- expando icon for nodes that we know don't have children.
+		//		(For efficiency reasons we may not want to check if an element actually
+		//		has children until user clicks the expando node)
+		return dojo.some(this.childrenAttrs, function(attr){
+			return this.store.hasAttribute(item, attr);
+		}, this);
+	},
+
+	getChildren: function(/*dojo.data.Item*/ parentItem, /*function(items)*/ onComplete, /*function*/ onError){
+		// summary
+		// 		Calls onComplete() with array of child items of given parent item, all loaded.
+
+		var store = this.store;
+
+		// get children of specified item
+		var childItems = [];
+		for (var i=0; i<this.childrenAttrs.length; i++){
+			var vals = store.getValues(parentItem, this.childrenAttrs[i]);
+			childItems = childItems.concat(vals);
+		}
+
+		// count how many items need to be loaded
+		var _waitCount = 0;
+		dojo.forEach(childItems, function(item){ if(!store.isItemLoaded(item)){ _waitCount++; } });
+
+		if(_waitCount == 0){
+			// all items are already loaded.  proceed...
+			onComplete(childItems);
+		}else{
+			// still waiting for some or all of the items to load
+			var onItem = function onItem(item){
+				if(--_waitCount == 0){
+					// all nodes have been loaded, send them to the tree
+					onComplete(childItems);
+				}
+			}
+			dojo.forEach(childItems, function(item){
+				if(!store.isItemLoaded(item)){
+					store.loadItem({
+						item: item,
+						onItem: onItem,
+						onError: onError
+					});
+				}
+			});
+		}
+	},
+
+	// =======================================================================
+	// Inspecting items
+
+	getIdentity: function(/* item */ item){
+		return this.store.getIdentity(item);	// Object
+	},
+
+	getLabel: function(/*dojo.data.Item*/ item){
+		// summary: get the label for an item
+		return this.store.getLabel(item);	// String
+	},
+
+	// =======================================================================
+	// Write interface
+
+	newItem: function(/* Object? */ args, /*Item*/ parent){
+		// summary
+		//		Creates a new item.   See dojo.data.api.Write for details on args.
+		//		Used in drag & drop when item from external source dropped onto tree.
+		var pInfo = {parent: parent, attribute: this.childrenAttrs[0]};
+		return this.store.newItem(args, pInfo);
+	},
+
+	pasteItem: function(/*Item*/ childItem, /*Item*/ oldParentItem, /*Item*/ newParentItem, /*Boolean*/ bCopy){
+		// summary
+		//		Move or copy an item from one parent item to another.
+		//		Used in drag & drop
+		var store = this.store,
+			parentAttr = this.childrenAttrs[0];	// name of "children" attr in parent item
+
+		// remove child from source item, and record the attributee that child occurred in	
+		if(oldParentItem){
+			dojo.forEach(this.childrenAttrs, function(attr){
+				if(store.containsValue(oldParentItem, attr, childItem)){
+					if(!bCopy){
+						var values = dojo.filter(store.getValues(oldParentItem, attr), function(x){
+							return x != childItem;
+						});
+						store.setValues(oldParentItem, attr, values);
+					}
+					parentAttr = attr;
+				}
+			});
+		}
+
+		// modify target item's children attribute to include this item
+		if(newParentItem){
+			store.setValues(newParentItem, parentAttr,
+				store.getValues(newParentItem, parentAttr).concat(childItem));
+		}
+	},
+
+	// =======================================================================
+	// Callbacks
+	
+	onChange: function(/*dojo.data.Item*/ item){
+		// summary
+		//		Callback whenever an item has changed, so that Tree
+		//		can update the label, icon, etc.   Note that changes
+		//		to an item's children or parent(s) will trigger an
+		//		onChildrenChange() so you can ignore those changes here.
+	},
+
+	onChildrenChange: function(/*dojo.data.Item*/ parent, /*dojo.data.Item[]*/ newChildrenList){
+		// summary
+		//		Callback to do notifications about new, updated, or deleted items.
+	},
+
+	// =======================================================================
+	///Events from data store
+
+	_onNewItem: function(/* dojo.data.Item */ item, /* Object */ parentInfo){
+		// summary: handler for when new items appear in the store.
+
+		//	In this case there's no correspond onSet() call on the parent of this
+		//	item, so need to get the new children list of the parent manually somehow.
+		if(!parentInfo){
+			return;
+		}
+		this.getChildren(parentInfo.item, dojo.hitch(this, function(children){
+			// NOTE: maybe can be optimized since parentInfo contains the new and old attribute value
+			this.onChildrenChange(parentInfo.item, children);
+		}));
+	},
+	
+	_onDeleteItem: function(/*Object*/ item){
+		// summary: handler for delete notifications from underlying store
+	},
+
+	_onSetItem: function(/* item */ item, 
+					/* attribute-name-string */ attribute, 
+					/* object | array */ oldValue,
+					/* object | array */ newValue){
+		//summary: set data event on an item in the store
+	
+		if(dojo.indexOf(this.childrenAttrs, attribute) != -1){
+			// item's children list changed
+			this.getChildren(item, dojo.hitch(this, function(children){
+				// NOTE: maybe can be optimized since parentInfo contains the new and old attribute value
+				this.onChildrenChange(item, children);
+			}));
+		}else{
+			// item's label/icon/etc. changed.
+			this.onChange(item);
+		}
+	}
+});
+
+dojo.declare("dijit.tree.ForestStoreModel", dijit.tree.TreeStoreModel, {
+	// summary
+	//		Interface between Tree and a dojo.store that doesn't have a root item, ie,
+	//		has multiple "top level" items.
+	//
+	// description
+	//		Use this class to wrap a dojo.store, making all the items matching the specified query
+	//		appear as children of a fabricated "root item".  If no query is specified then all the
+	//		items returned by fetch() on the underlying store become children of the root item.
+	//		It allows dijit.Tree to assume a single root item, even if the store doesn't have one.
+
+	// Parameters to constructor
+
+	// rootId: String
+	//	ID of fabricated root item
+	rootId: "$root$",
+
+	// rootLabel: String
+	//	Label of fabricated root item
+	rootLabel: "ROOT",
+
+	// query: String
+	//	Specifies the set of children of the root item.
+	// example:
+	//		{type:'continent'}
+	query: null,
+
+	// End of parameters to constructor
+
+	constructor: function(params){
+		// Make dummy root item
+		this.root = {
+			store: this,
+			root: true,
+			id: params.rootId,
+			label: params.rootLabel,
+			children: params.rootChildren	// optional param
+		};
+	},
+
+	// =======================================================================
+	// Methods for traversing hierarchy
+
+	mayHaveChildren: function(/*dojo.data.Item*/ item){
+		// summary
+		//		Tells if an item has or may have children.  Implementing logic here
+		//		avoids showing +/- expando icon for nodes that we know don't have children.
+		//		(For efficiency reasons we may not want to check if an element actually
+		//		has children until user clicks the expando node)
+		return item === this.root || this.inherited(arguments);
+	},
+
+	getChildren: function(/*dojo.data.Item*/ parentItem, /*function(items)*/ callback, /*function*/ onError){
+		// summary
+		// 		Calls onComplete() with array of child items of given parent item, all loaded.
+		if(parentItem === this.root){
+			if(this.root.children){
+				// already loaded, just return
+				callback(this.root.children);
+			}else{
+				this.store.fetch({
+					query: this.query,
+					onComplete: dojo.hitch(this, function(items){
+						this.root.children = items;
+						callback(items);
+					}),
+					onError: onError
+				});
+			}
+		}else{
+			this.inherited(arguments);
+		}
+	},
+
+	// =======================================================================
+	// Inspecting items
+
+	getIdentity: function(/* item */ item){
+		return (item === this.root) ? this.root.id : this.inherited(arguments);
+	},
+
+	getLabel: function(/* item */ item){
+		return	(item === this.root) ? this.root.label : this.inherited(arguments);
+	},
+
+	// =======================================================================
+	// Write interface
+
+	newItem: function(/* Object? */ args, /*Item*/ parent){
+		// summary
+		//		Creates a new item.   See dojo.data.api.Write for details on args.
+		//		Used in drag & drop when item from external source dropped onto tree.
+		if(parent===this.root){
+			this.onNewRootItem(args);
+			return this.store.newItem(args);
+		}else{
+			return this.inherited(arguments);
+		}
+	},
+ 
+	onNewRootItem: function(args){
+		// summary:
+		//		User can override this method to modify a new element that's being
+		//		added to the root of the tree, for example to add a flag like root=true
+	},
+
+	pasteItem: function(/*Item*/ childItem, /*Item*/ oldParentItem, /*Item*/ newParentItem, /*Boolean*/ bCopy){
+		// summary
+		//		Move or copy an item from one parent item to another.
+		//		Used in drag & drop
+		if(oldParentItem === this.root){
+			if(!bCopy){
+				// It's onLeaveRoot()'s responsibility to modify the item so it no longer matches
+				// this.query... thus triggering an onChildrenChange() event to notify the Tree
+				// that this element is no longer a child of the root node
+				this.onLeaveRoot(childItem);
+			}
+		}
+		dijit.tree.TreeStoreModel.prototype.pasteItem.call(this, childItem,
+			oldParentItem === this.root ? null : oldParentItem,
+			newParentItem === this.root ? null : newParentItem
+		);
+		if(newParentItem === this.root){
+			// It's onAddToRoot()'s responsibility to modify the item so it matches
+			// this.query... thus triggering an onChildrenChange() event to notify the Tree
+			// that this element is now a child of the root node
+			this.onAddToRoot(childItem);
+		}
+	},
+
+	// =======================================================================
+	// Callbacks
+	
+	onAddToRoot: function(/* item */ item){
+		// summary
+		//		Called when item added to root of tree; user must override
+		//		to modify the item so that it matches the query for top level items
+		// example
+		//	|	store.setValue(item, "root", true);
+		console.log(this, ": item ", item, " added to root");
+	},
+
+	onLeaveRoot: function(/* item */ item){
+		// summary
+		//		Called when item removed from root of tree; user must override
+		//		to modify the item so it doesn't match the query for top level items
+		// example
+		// 	|	store.unsetAttribute(item, "root");
+		console.log(this, ": item ", item, " removed from root");
+	},
+	
+	// =======================================================================
+	// Events from data store
+
+	_requeryTop: function(){
+		// reruns the query for the children of the root node,
+		// sending out an onSet notification if those children have changed
+		var _this = this,
+			oldChildren = this.root.children;
+		this.store.fetch({
+			query: this.query,
+			onComplete: function(newChildren){
+				_this.root.children = newChildren;
+
+				// If the list of children or the order of children has changed...	
+				if(oldChildren.length != newChildren.length ||
+					dojo.some(oldChildren, function(item, idx){ return newChildren[idx] != item;})){
+					_this.onChildrenChange(_this.root, newChildren);
+				}
+			}
+		});
+	},
+
+	_onNewItem: function(/* dojo.data.Item */ item, /* Object */ parentInfo){
+		// summary: handler for when new items appear in the store.
+
+		//		In theory, any new item could be a top level item.
+		//		Do the safe but inefficient thing by requerying the top
+		//		level items.   User can override this function to do something
+		//		more efficient.
+		this._requeryTop();
+
+		this.inherited(arguments);
+	},
+
+	_onDeleteItem: function(/*Object*/ item){
+		// summary: handler for delete notifications from underlying store
+
+		// check if this was a child of root, and if so send notification that root's children
+		// have changed
+		if(dojo.indexOf(this.root.children, item) != -1){
+			this._requeryTop();
+		}
+
+		this.inherited(arguments);
+	}
+});
+
+}
-- 
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