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<pre class="prettyprint lang-js"><span id='Ext-dd-Registry'>/**
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</span> * Provides easy access to all drag drop components that are registered on a page. Items can be retrieved either
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* directly by DOM node id, or by passing in the drag drop event that occurred and looking up the event target.
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*/
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Ext.define('Ext.dd.Registry', {
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singleton: true,
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<span id='Ext-dd-Registry-method-constructor'> constructor: function() {
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</span> this.elements = {};
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this.handles = {};
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this.autoIdSeed = 0;
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},
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<span id='Ext-dd-Registry-method-getId'> getId: function(el, autogen){
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</span> if(typeof el == "string"){
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return el;
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}
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var id = el.id;
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if(!id && autogen !== false){
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id = "extdd-" + (++this.autoIdSeed);
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el.id = id;
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}
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return id;
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},
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<span id='Ext-dd-Registry-method-register'> /**
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</span> * Registers a drag drop element.
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*
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* @param {String/HTMLElement} element The id or DOM node to register
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* @param {Object} data An custom data object that will be passed between the elements that are involved in drag
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* drop operations. You can populate this object with any arbitrary properties that your own code knows how to
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* interpret, plus there are some specific properties known to the Registry that should be populated in the data
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* object (if applicable):
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* @param {HTMLElement[]} data.handles Array of DOM nodes that trigger dragging for the element being registered.
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* @param {Boolean} data.isHandle True if the element passed in triggers dragging itself, else false.
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*/
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register : function(el, data){
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data = data || {};
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if (typeof el == "string") {
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el = document.getElementById(el);
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}
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data.ddel = el;
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this.elements[this.getId(el)] = data;
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if (data.isHandle !== false) {
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this.handles[data.ddel.id] = data;
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}
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if (data.handles) {
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var hs = data.handles,
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i, len;
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for (i = 0, len = hs.length; i < len; i++) {
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this.handles[this.getId(hs[i])] = data;
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}
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}
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},
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<span id='Ext-dd-Registry-method-unregister'> /**
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</span> * Unregister a drag drop element
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* @param {String/HTMLElement} element The id or DOM node to unregister
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*/
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unregister : function(el){
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var id = this.getId(el, false),
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data = this.elements[id],
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hs, i, len;
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if(data){
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delete this.elements[id];
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if(data.handles){
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hs = data.handles;
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for (i = 0, len = hs.length; i < len; i++) {
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delete this.handles[this.getId(hs[i], false)];
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}
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}
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}
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},
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<span id='Ext-dd-Registry-method-getHandle'> /**
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</span> * Returns the handle registered for a DOM Node by id
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* @param {String/HTMLElement} id The DOM node or id to look up
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* @return {Object} handle The custom handle data
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*/
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getHandle : function(id){
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if(typeof id != "string"){ // must be element?
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id = id.id;
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}
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return this.handles[id];
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},
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<span id='Ext-dd-Registry-method-getHandleFromEvent'> /**
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</span> * Returns the handle that is registered for the DOM node that is the target of the event
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* @param {Event} e The event
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* @return {Object} handle The custom handle data
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*/
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getHandleFromEvent : function(e){
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var t = e.getTarget();
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return t ? this.handles[t.id] : null;
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},
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<span id='Ext-dd-Registry-method-getTarget'> /**
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</span> * Returns a custom data object that is registered for a DOM node by id
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* @param {String/HTMLElement} id The DOM node or id to look up
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* @return {Object} data The custom data
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*/
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getTarget : function(id){
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if(typeof id != "string"){ // must be element?
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id = id.id;
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}
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return this.elements[id];
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},
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<span id='Ext-dd-Registry-method-getTargetFromEvent'> /**
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</span> * Returns a custom data object that is registered for the DOM node that is the target of the event
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* @param {Event} e The event
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* @return {Object} data The custom data
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*/
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getTargetFromEvent : function(e){
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var t = e.getTarget();
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return t ? this.elements[t.id] || this.handles[t.id] : null;
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}
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});</pre>
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