/** * 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. */Ext.define('Ext.dd.Registry', { singleton: true, constructor: function() { this.elements = {}; this.handles = {}; this.autoIdSeed = 0; }, getId: function(el, autogen) { var id; if (typeof el === "string") { return el; } id = el.id; if (!id && autogen !== false) { id = "extdd-" + (++this.autoIdSeed); el.id = id; } return id; }, /** * Registers a drag drop element. * * @param {String/HTMLElement} el The id or DOM node to register * @param {Object} data 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): * @param {HTMLElement[]} data.handles Array of DOM nodes that trigger dragging for the element * being registered. * @param {Boolean} data.isHandle True if the element passed in triggers dragging itself, * else false. */ register: function(el, data) { var hs, i, len; data = data || {}; if (typeof el === "string") { el = document.getElementById(el); } data.ddel = el; this.elements[this.getId(el)] = data; if (data.isHandle !== false) { this.handles[data.ddel.id] = data; } if (data.handles) { hs = data.handles; for (i = 0, len = hs.length; i < len; i++) { this.handles[this.getId(hs[i])] = data; } } }, /** * Unregister a drag drop element * @param {String/HTMLElement} el The id or DOM node to unregister */ unregister: function(el) { var id = this.getId(el, false), data = this.elements[id], hs, i, len; if (data) { delete this.elements[id]; if (data.handles) { hs = data.handles; for (i = 0, len = hs.length; i < len; i++) { delete this.handles[this.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 this.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 = e.getTarget(); return t ? this.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 this.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 = e.getTarget(); return t ? this.elements[t.id] || this.handles[t.id] : null; }});