source: Dev/trunk/src/client/dojox/mdnd/LazyManager.js

define([
        "dojo/_base/kernel",    
        "dojo/_base/declare",
        "dojo/_base/lang",      // dojo.hitch
        "dojo/dom-class",
        "dojo/dom-construct",
        "dojo/dom-attr",
        "dojo/dnd/common",
        "dojo/dnd/Manager",
        "./PureSource",
        "dojo/_base/unload"  // dojo.addOnUnload
],function(dojo, declare, lang, domClass, domConstruct, domAttr, dnd, Manager, PureSource){
        return declare(
                "dojox.mdnd.LazyManager",
                null,
        {
                // summary:
                //              This class allows to launch a drag and drop dojo on the fly.
                
                constructor: function(){
                        //console.log("dojox.mdnd.LazyManager ::: constructor");
                        this._registry = {};
                        // initialization of the _fakeSource to enabled DragAndDrop :
                        this._fakeSource = new PureSource(domConstruct.create("div"), {
                                'copyOnly': false
                        });
                        this._fakeSource.startup();
                        dojo.addOnUnload(lang.hitch(this, "destroy"));
                        this.manager = Manager.manager();
                },
                
                getItem: function(/*DOMNode*/draggedNode){
                        //console.log("dojox.mdnd.LazyManager ::: getItem");
                        var type = draggedNode.getAttribute("dndType");
                        return {
                                'data' : draggedNode.getAttribute("dndData") || draggedNode.innerHTML,
                                'type' : type ? type.split(/\s*,\s*/) : ["text"]
                        }
                },
                
                startDrag: function(/*Event*/e, /*DOMNode?*/draggedNode){
                        // summary:
                        //              launch a dojo drag and drop on the fly.
        
                        //console.log("dojox.mdnd.LazyManager ::: startDrag");
                        draggedNode = draggedNode || e.target;
                        if(draggedNode){
                                var m = this.manager,
                                        object = this.getItem(draggedNode);
                                if(draggedNode.id == ""){
                                  domAttr.set(draggedNode, "id", dnd.getUniqueId());
                                }
                                domClass.add(draggedNode, "dojoDndItem");
                                this._fakeSource.setItem(draggedNode.id, object);
                                m.startDrag(this._fakeSource, [draggedNode], false);
                                m.onMouseMove(e);
                        }
                },
                
                cancelDrag: function(){
                        // summary:
                        //              cancel a drag and drop dojo on the fly.
        
                        //console.log("dojox.mdnd.LazyManager ::: cancelDrag");
                        var m = this.manager;
                        m.target = null;
                        m.onMouseUp();
                },
                
                
                destroy: function(){
                        //console.log("dojox.mdnd.LazyManager ::: destroy");
                        this._fakeSource.destroy();
                }
        });
});