easyui-combotree指定key和text

原版easyu没有对combotree组件提供valueField和textField的指定，网上查找资料后得到如下解决方案

$.fn.tree.defaults.loadFilter = function(data, parent) {
	var options = $(this).data().tree.options;
	var idField = options.idField || 'id',
	textField = options.textField || 'text',
	iconField = options.iconField || 'iconCls',
 
	attributes = options.attributes || [];
 
	var transform = function(node) {
		if (!node['id'] && node[idField]) 
			node['id'] = node[idField];
		if (!node['text'] && node[textField]) 
			node['text'] = node[textField];
		if (!node['iconCls'] && node[iconField]) 
			node['iconCls'] = node[iconField];
	
		if (attributes && $.isArray(attributes)) {
			if (!node['attributes']) {
				node['attributes'] = {};
			}
 
			for (var i = 0; i < attributes.length; i++) {
				node['attributes'][attributes[i]] = node[attributes[i]];
			}
		}
 
		if (node['children']) {
			for (var i = 0; i < node['children'].length; i++) {
				transform(node['children'][i]);
			}
		}
	}
 
	for (var i = 0; i < data.length; i++) {
		transform(data[i]);
	}
 
	return data;
}
 
$.fn.combotree.defaults.loadFilter = $.fn.tree.defaults.loadFilter;