/*! - * Ext JS Library 3.2.1 - * Copyright(c) 2006-2010 Ext JS, Inc. - * licensing@extjs.com - * http://www.extjs.com/license +\ No newline at end of fileSencha Documentation Project /** + * @class Ext.util.Sorter + * @extends Object + * Represents a single sorter that can be applied to a Store */ -/** - * @class Ext.list.Sorter - * @extends Ext.util.Observable - *- - \ No newline at end of file +});Supporting Class for Ext.list.ListView
- * @constructor - * @param {Object} config - */ -Ext.list.Sorter = Ext.extend(Ext.util.Observable, { - /** - * @cfg {Array} sortClasses - * The CSS classes applied to a header when it is sorted. (defaults to ["sort-asc", "sort-desc"]) - */ - sortClasses : ["sort-asc", "sort-desc"], +Ext.define('Ext.util.Sorter', { - constructor: function(config){ - Ext.apply(this, config); - Ext.list.Sorter.superclass.constructor.call(this); + /** + * @cfg {String} property The property to sort by. Required unless {@link #sorter} is provided + */ + + /** + * @cfg {Function} sorterFn A specific sorter function to execute. Can be passed instead of {@link #property} + */ + + /** + * @cfg {String} root Optional root property. This is mostly useful when sorting a Store, in which case we set the + * root to 'data' to make the filter pull the {@link #property} out of the data object of each item + */ + + /** + * @cfg {Function} transform A function that will be run on each value before + * it is compared in the sorter. The function will receive a single argument, + * the value. + */ + + /** + * @cfg {String} direction The direction to sort by. Defaults to ASC + */ + direction: "ASC", + + constructor: function(config) { + var me = this; + + Ext.apply(me, config); + + //<debug> + if (me.property == undefined && me.sorterFn == undefined) { + Ext.Error.raise("A Sorter requires either a property or a sorter function"); + } + //</debug> + + me.updateSortFunction(); }, - - init : function(listView){ - this.view = listView; - listView.on('render', this.initEvents, this); + + /** + * @private + * Creates and returns a function which sorts an array by the given property and direction + * @return {Function} A function which sorts by the property/direction combination provided + */ + createSortFunction: function(sorterFn) { + var me = this, + property = me.property, + direction = me.direction || "ASC", + modifier = direction.toUpperCase() == "DESC" ? -1 : 1; + + //create a comparison function. Takes 2 objects, returns 1 if object 1 is greater, + //-1 if object 2 is greater or 0 if they are equal + return function(o1, o2) { + return modifier * sorterFn.call(me, o1, o2); + }; }, + + /** + * @private + * Basic default sorter function that just compares the defined property of each object + */ + defaultSorterFn: function(o1, o2) { + var me = this, + transform = me.transform, + v1 = me.getRoot(o1)[me.property], + v2 = me.getRoot(o2)[me.property]; + + if (transform) { + v1 = transform(v1); + v2 = transform(v2); + } - initEvents : function(view){ - view.mon(view.innerHd, 'click', this.onHdClick, this); - view.innerHd.setStyle('cursor', 'pointer'); - view.mon(view.store, 'datachanged', this.updateSortState, this); - this.updateSortState.defer(10, this, [view.store]); + return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0); }, - - updateSortState : function(store){ - var state = store.getSortState(); - if(!state){ - return; - } - this.sortState = state; - var cs = this.view.columns, sortColumn = -1; - for(var i = 0, len = cs.length; i < len; i++){ - if(cs[i].dataIndex == state.field){ - sortColumn = i; - break; - } - } - if(sortColumn != -1){ - var sortDir = state.direction; - this.updateSortIcon(sortColumn, sortDir); - } + + /** + * @private + * Returns the root property of the given item, based on the configured {@link #root} property + * @param {Object} item The item + * @return {Object} The root property of the object + */ + getRoot: function(item) { + return this.root == undefined ? item : item[this.root]; }, - - updateSortIcon : function(col, dir){ - var sc = this.sortClasses; - var hds = this.view.innerHd.select('em').removeClass(sc); - hds.item(col).addClass(sc[dir == "DESC" ? 1 : 0]); + + // @TODO: Add docs for these three methods + setDirection: function(direction) { + var me = this; + me.direction = direction; + me.updateSortFunction(); }, - - onHdClick : function(e){ - var hd = e.getTarget('em', 3); - if(hd && !this.view.disableHeaders){ - var index = this.view.findHeaderIndex(hd); - this.view.store.sort(this.view.columns[index].dataIndex); - } + + toggle: function() { + var me = this; + me.direction = Ext.String.toggle(me.direction, "ASC", "DESC"); + me.updateSortFunction(); + }, + + updateSortFunction: function() { + var me = this; + me.sort = me.createSortFunction(me.sorterFn || me.defaultSorterFn); } -}); - -// Backwards compatibility alias -Ext.ListView.Sorter = Ext.list.Sorter;