www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/widgets/tree/TreeSorter.js
/* * Ext JS Library 2.0.2 * Copyright(c) 2006-2008, Ext JS, LLC. * licensing@extjs.com * * http://extjs.com/license */ /** * @class Ext.tree.TreeSorter * Provides sorting of nodes in a TreePanel * * @cfg {Boolean} folderSort True to sort leaf nodes under non leaf nodes * @cfg {String} property The named attribute on the node to sort by (defaults to text) * @cfg {String} dir The direction to sort (asc or desc) (defaults to asc) * @cfg {String} leafAttr The attribute used to determine leaf nodes in folder sort (defaults to "leaf") * @cfg {Boolean} caseSensitive true for case sensitive sort (defaults to false) * @cfg {Function} sortType A custom "casting" function used to convert node values before sorting * @constructor * @param {TreePanel} tree * @param {Object} config */ Ext.tree.TreeSorter = function(tree, config){ Ext.apply(this, config); tree.on("beforechildrenrendered", this.doSort, this); tree.on("append", this.updateSort, this); tree.on("insert", this.updateSort, this); tree.on("textchange", this.updateSortParent, this); var dsc = this.dir && this.dir.toLowerCase() == "desc"; var p = this.property || "text"; var sortType = this.sortType; var fs = this.folderSort; var cs = this.caseSensitive === true; var leafAttr = this.leafAttr || 'leaf'; this.sortFn = function(n1, n2){ if(fs){ if(n1.attributes[leafAttr] && !n2.attributes[leafAttr]){ return 1; } if(!n1.attributes[leafAttr] && n2.attributes[leafAttr]){ return -1; } } var v1 = sortType ? sortType(n1) : (cs ? n1.attributes[p] : n1.attributes[p].toUpperCase()); var v2 = sortType ? sortType(n2) : (cs ? n2.attributes[p] : n2.attributes[p].toUpperCase()); if(v1 < v2){ return dsc ? +1 : -1; }else if(v1 > v2){ return dsc ? -1 : +1; }else{ return 0; } }; }; Ext.tree.TreeSorter.prototype = { doSort : function(node){ node.sort(this.sortFn); }, compareNodes : function(n1, n2){ return (n1.text.toUpperCase() > n2.text.toUpperCase() ? 1 : -1); }, updateSort : function(tree, node){ if(node.childrenRendered){ this.doSort.defer(1, this, [node]); } }, updateSortParent : function(node){ var p = node.parentNode; if(p && p.childrenRendered){ this.doSort.defer(1, this, [p]); } } };