easyui Combotree根据用户输入显示对应的tree值

(function(){
$.fn.combotree.defaults.editable = true;
$.extend($.fn.combotree.defaults.keyHandler,{
up:function(){
console.log('up');
},
down:function(){
console.log('down');
},
enter:function(){
console.log('enter');
},
query:function(q){
$(this).combotree('tree').tree('expandAll');
var t = $(this).combotree('tree');
var nodes = t.tree('getChildren');

for(var i=0; i<nodes.length; i++){
var node = nodes[i];
if (node.text.indexOf(q) >= 0){

$(node.target).show();
} else {
$(node.target).hide();
}
}
var opts = $(this).combotree('options');
if (!opts.hasSetEvents){
opts.hasSetEvents = true;
var onShowPanel = opts.onShowPanel;
opts.onShowPanel = function(){
var nodes = t.tree('getChildren');
for(var i=0; i<nodes.length; i++){
$(nodes[i].target).show();
}
onShowPanel.call(this);
};
$(this).combo('options').onShowPanel = opts.onShowPanel;
}
}
});
})(jQuery);