/*!
 * Ext JS Library 3.2.0
 * Copyright(c) 2006-2010 Ext JS, Inc.
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
/** * @class Ext.dd.Registry * Provides easy access to all drag drop components that are registered on a page. Items can be retrieved either * directly by DOM node id, or by passing in the drag drop event that occurred and looking up the event target. * @singleton */ Ext.dd.Registry = function(){ var elements = {}; var handles = {}; var autoIdSeed = 0; var getId = function(el, autogen){ if(typeof el == "string"){ return el; } var id = el.id; if(!id && autogen !== false){ id = "extdd-" + (++autoIdSeed); el.id = id; } return id; }; return {
/** * Resgister a drag drop element * @param {String/HTMLElement} element The id or DOM node to register * @param {Object} data (optional) An custom data object that will be passed between the elements that are involved * in drag drop operations. You can populate this object with any arbitrary properties that your own code * knows how to interpret, plus there are some specific properties known to the Registry that should be * populated in the data object (if applicable): *
Value      Description
--------- ------------------------------------------
handles Array of DOM nodes that trigger dragging
for the element being registered
isHandle True if the element passed in triggers
dragging itself, else false
*/ register : function(el, data){ data = data || {}; if(typeof el == "string"){ el = document.getElementById(el); } data.ddel = el; elements[getId(el)] = data; if(data.isHandle !== false){ handles[data.ddel.id] = data; } if(data.handles){ var hs = data.handles; for(var i = 0, len = hs.length; i < len; i++){ handles[getId(hs[i])] = data; } } },
/** * Unregister a drag drop element * @param {String/HTMLElement} element The id or DOM node to unregister */ unregister : function(el){ var id = getId(el, false); var data = elements[id]; if(data){ delete elements[id]; if(data.handles){ var hs = data.handles; for(var i = 0, len = hs.length; i < len; i++){ delete handles[getId(hs[i], false)]; } } } },
/** * Returns the handle registered for a DOM Node by id * @param {String/HTMLElement} id The DOM node or id to look up * @return {Object} handle The custom handle data */ getHandle : function(id){ if(typeof id != "string"){ // must be element? id = id.id; } return handles[id]; },
/** * Returns the handle that is registered for the DOM node that is the target of the event * @param {Event} e The event * @return {Object} handle The custom handle data */ getHandleFromEvent : function(e){ var t = Ext.lib.Event.getTarget(e); return t ? handles[t.id] : null; },
/** * Returns a custom data object that is registered for a DOM node by id * @param {String/HTMLElement} id The DOM node or id to look up * @return {Object} data The custom data */ getTarget : function(id){ if(typeof id != "string"){ // must be element? id = id.id; } return elements[id]; },
/** * Returns a custom data object that is registered for the DOM node that is the target of the event * @param {Event} e The event * @return {Object} data The custom data */ getTargetFromEvent : function(e){ var t = Ext.lib.Event.getTarget(e); return t ? elements[t.id] || handles[t.id] : null; } }; }();