flymis/WebRoot/dojojs/src/widget/TreeDndControllerV3.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/


dojo.provide("dojo.widget.TreeDndControllerV3");

dojo.require("dojo.dnd.TreeDragAndDropV3");
	
dojo.widget.defineWidget(
	"dojo.widget.TreeDndControllerV3",
	[dojo.widget.HtmlWidget, dojo.widget.TreeCommon],
	function() {
		this.dragSources = {};
		this.dropTargets = {};
		this.listenedTrees = {};
	},
{
	listenTreeEvents: ["afterChangeTree","beforeTreeDestroy", "afterAddChild"],
	listenNodeFilter: function(elem) { return elem instanceof dojo.widget.Widget}, 
	
	initialize: function(args) {
		this.treeController = dojo.lang.isString(args.controller) ? dojo.widget.byId(args.controller) : args.controller;
		
		if (!this.treeController) {
			dojo.raise("treeController must be declared");
		}
		
	},

	onBeforeTreeDestroy: function(message) {
		this.unlistenTree(message.source);
	},
	
	// first Dnd registration happens in addChild
	// because I have information about parent on this stage and can use it
	// to check locking or other things
	onAfterAddChild: function(message) {
		//dojo.debug("Dnd addChild "+message.child);
		this.listenNode(message.child);		
	},


	onAfterChangeTree: function(message) {
		/* catch new nodes on afterAddChild, because I need parent */		
		if (!message.oldTree) return;
		
		//dojo.debug("HERE");
		
		if (!message.newTree || !this.listenedTrees[message.newTree.widgetId]) {			
			this.processDescendants(message.node, this.listenNodeFilter, this.unlistenNode);
		}		
		
		if (!this.listenedTrees[message.oldTree.widgetId]) {
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