easyUI combobox combotree 模糊查询,带上下键选择功能，待完善。。。。

/2017年4月9日 11:52:36
/**
 * combobox和combotree模糊查询
 * combotree 结果带两级父节点(手动设置数量)
 * 键盘上下键选择叶子节点
 * 键盘回车键设置文本的值
 */
(function(){
    //combobox可编辑，自定义模糊查询
    $.fn.combobox.defaults.editable = true;
    $.fn.combobox.defaults.filter = function(q, row){
        var opts = $(this).combobox('options');
        return row[opts.textField].indexOf(q) >= 0;
    };
    //combotree可编辑，自定义模糊查询
    $.fn.combotree.defaults.editable = true;
    //选中行索引
    var leafBlockIndex=0;
    //当前选中行索引
    var nowLeafBlockIndex=-1;
    //combotree 组件
    var    comboTree=null;
    //叶子节点DOM Array
    var leafBlocks=null;;
    //将所有的结果叶子节点放入 DOM Array中
    function getDOMArray(data){
        comboTree = $(data).combotree('tree');
        leafBlocks=new Array();
        var leafs = comboTree.tree('getChildren');
        for (var i = 0; i < leafs.length; i++) {
            var leaf = leafs[i];
            var dis =$(leaf.target).css('display')+'';
            if('block' == dis){
                if(comboTree.tree('isLeaf',leaf.target)){
                    leafBlocks.push(leaf.target);
                }
            }
        };
    };
    //-------------------------------------
    $.extend($.fn.combotree.defaults.keyHandler,{
        up:function(e){
            leafBlockIndex=nowLeafBlockIndex;
            leafBlockIndex--;
            getDOMArray(this);
            if(leafBlockIndex <0){
                leafBlockIndex=leafBlocks.length-1;
            }
            comboTree.tree('select',leafBlocks[leafBlockIndex]);
//            easyui 1.3.4版开始可用
//            comboTree.tree('scrollTo',leafBlocks[leafBlockIndex]);
            nowLeafBlockIndex=leafBlockIndex;
        },
        down:function(e){
            leafBlockIndex=nowLeafBlockIndex;
            leafBlockIndex++;
            getDOMArray(this);
            if(leafBlockIndex >= leafBlocks.length){
                leafBlockIndex=0;
            }
            comboTree.tree('select',leafBlocks[leafBlockIndex]);
//            easyui 1.3.4版开始可用
//            comboTree.tree('scrollTo',leafBlocks[leafBlockIndex]);
            nowLeafBlockIndex=leafBlockIndex;
        },
        left: function(e){
            console.log('left');
//            var val = $(this).combo('getText');
//            $(this).combo('setText',val+' ');
        },
        right: function(e){
            console.log('right');
//            var val = $(this).combo('getText');
//            console.log(val);
//            $(this).combo('setText',val+' ');
        },
        enter:function(e){
            var leaf =$(leafBlocks[nowLeafBlockIndex]);
            var value =leaf.children('span').last().text();
            $(this).combo('setText',value);
            $(this).combo('hidePanel')
        },
        query:function(q){
            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();
                    var parent=t.tree('getParent',node.target);
                    if(parent){
                        $(parent.target).show();
                        if(parent){
                            parent=t.tree('getParent',parent.target);
                            $(parent.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); 

• 引用的别人的原代码：

(function ($) {
    //combotree可编辑，自定义模糊查询
    $.fn.combotree.defaults.editable = true;
    $.extend($.fn.combotree.defaults.keyHandler, {
        query: function (q) {
            var t = $(this).combotree('tree');
            t.tree("search", q);
        }
    });
    $.extend($.fn.tree.methods, {           /**
         * 扩展easyui tree的搜索方法
         * @param tree easyui tree的根DOM节点(UL节点)的jQuery对象          * @param searchText 检索的文本
         * @param this-context easyui tree的tree对象          */
        search: function (jqTree, searchText) {
            //easyui tree的tree对象。可以通过tree.methodName(jqTree)方式调用easyui tree的方法
            var tree = this;
            //获取所有的树节点
            var nodeList = getAllNodes(jqTree, tree);
            //如果没有搜索条件，则展示所有树节点
            searchText = $.trim(searchText);
            if (searchText == "") {
                for (var i = 0; i < nodeList.length; i++) {
                    $(".tree-node-targeted",
                nodeList[i].target).removeClass("tree-node-targeted");
                    $(nodeList[i].target).show();
                }
                //展开已选择的节点（如果之前选择了）
                var selectedNode = tree.getSelected(jqTree);
                if (selectedNode) {
                    tree.expandTo(jqTree, selectedNode.target);
                }
                return;
            }
            //搜索匹配的节点并高亮显示
            var matchedNodeList = [];
            if (nodeList && nodeList.length > 0) {
                var node = null;
                for (var i = 0; i < nodeList.length; i++) {
                    node = nodeList[i];
                    if (isMatch(searchText, node.text)) {
                        matchedNodeList.push(node);
                    }
                }
                //隐藏所有节点
                for (var i = 0; i < nodeList.length; i++) {
                    $(".tree-node-targeted", nodeList[i].target).removeClass("tree-node-targeted");
                    $(nodeList[i].target).hide();
                }
                //折叠所有节点
                tree.collapseAll(jqTree);
                //展示所有匹配的节点以及父节点 

                for (var i = 0; i < matchedNodeList.length; i++) {
                    showMatchedNode(jqTree, tree, matchedNodeList[i]);
                }
            }
        },
        /**
        * 展示节点的子节点（子节点有可能在搜索的过程中被隐藏了）
        * @param node easyui tree节点
        */
        showChildren: function (jqTree, node) {
            //easyui tree的tree对象。可以通过tree.methodName(jqTree)方式调用easyui tree的方法
            var tree = this;
            //展示子节点
            if (!tree.isLeaf(jqTree, node.target)) {
                var children = tree.getChildren(jqTree, node.target);
                if (children && children.length > 0) {
                    for (var i = 0; i < children.length; i++) {
                        if ($(children[i].target).is(":hidden")) {
                            $(children[i].target).show();
                        }
                    }
                }
            }
        },
        /**
        * 将滚动条滚动到指定的节点位置，使该节点可见（如果有滚动条才滚动，没有滚动条就不滚动）
        * @param param {
        * treeContainer: easyui tree的容器（即存在滚动条的树容器）。如果为null，则取easyui tree的根UL节点的父节点。
        * argetNode:  将要滚动到的easyui tree节点。如果targetNode为空，则默认滚动到当前已选中的节点，如果没有选中的节点，则不滚动          * }             */
        scrollTo: function (jqTree, param) {
            //easyui tree的tree对象。可以通过tree.methodName(jqTree)方式调用easyui tree的方法
            var tree = this;
            //如果node为空，则获取当前选中的node
            var targetNode = param && param.targetNode ? param.targetNode : tree.getSelected(jqTree);
            if (targetNode != null) {
                //判断节点是否在可视区域                 var root = tree.getRoot(jqTree);
                var $targetNode = $(targetNode.target);
                var Container = param && param.treeContainer ? param.treeContainer : jqTree.parent();
                var containerH = container.height();
                var nodeOffsetHeight = $targetNode.offset().top - container.offset().top;
                if (nodeOffsetHeight > (containerH - 30)) {
                    var scrollHeight = container.scrollTop() + nodeOffsetHeight - containerH + 30;
                    container.scrollTop(scrollHeight);
                }
            }
        }
    });
    /**
         * 展示搜索匹配的节点      */
    function showMatchedNode(jqTree, tree, node) {
        //展示所有父节点
        $(node.target).show();
        $(".tree-title", node.target).addClass("tree-node-targeted");
        var pNode = node;
        while ((pNode = tree.getParent(jqTree, pNode.target))) {
            $(pNode.target).show();
        }
        //展开到该节点
        tree.expandTo(jqTree, node.target);
        //如果是非叶子节点，需折叠该节点的所有子节点
        if (!tree.isLeaf(jqTree, node.target)) {
            tree.collapse(jqTree, node.target);
        }
    }
    /**
     * 判断searchText是否与targetText匹配
     * @param searchText 检索的文本      * @param targetText 目标文本
     * @return true-检索的文本与目标文本匹配；否则为false.
    */
    function isMatch(searchText, targetText) {
        return $.trim(targetText) != "" && targetText.indexOf(searchText) != -1;
    }
    /**
     * 获取easyui tree的所有node节点      */
    function getAllNodes(jqTree, tree) {
        var allNodeList = jqTree.data("allNodeList");
        if (!allNodeList) {
            var roots = tree.getRoots(jqTree);
            allNodeList = getChildNodeList(jqTree, tree, roots);
            jqTree.data("allNodeList", allNodeList);
        }
        return allNodeList;
    }
    /**
     * 定义获取easyui tree的子节点的递归算法      */
    function getChildNodeList(jqTree, tree, nodes) {
        var childNodeList = [];
        if (nodes && nodes.length > 0) {
            var node = null;
            for (var i = 0; i < nodes.length; i++) {
                node = nodes[i];
                childNodeList.push(node);
                if (!tree.isLeaf(jqTree, node.target)) {
                    var children = tree.getChildren(jqTree, node.target);
                    childNodeList = childNodeList.concat(getChildNodeList(jqTree, tree, children));
                }
            }
        }
        return childNodeList;
    }
})(jQuery);