jQuery EasyUI 树形菜单 - 树形菜单加载父/子节点

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pre-wrap;}jQuery EasyUI 树形菜单 - 树形菜单加载父/子节点通常表示一个树节点的方式就是在每一个节点存储一个 parentid。这个也被称为邻接列表模型。直接加载这些数据到树形菜单（Tree）是不允许的。但是我们可以在加载树形菜单之前，把它转换为标准标准的树形菜单（Tree）数据格式。树（Tree）插件提供一个 'loadFilter' 选项函数，它可以实现这个功能。它提供一个机会来改变任何一个进入数据。本教程向您展示如何使用 'loadFilter' 函数加载父/子节点到树形菜单（Tree）。父/子节点数据    [    {"id":





1,"parendId":





0,"name":





"Foods"},    {"id":





2,"parentId":





1,"name":





"Fruits"},    {"id":





3,"parentId":





1,"name":





"Vegetables"},    {"id":





4,"parentId":





2,"name":





"apple"},    {"id":





5,"parentId":





2,"name":





"orange"},    {"id":





6,"parentId":





3,"name":





"tomato"},    {"id":





7,"parentId":





3,"name":





"carrot"},    {"id":





8,"parentId":





3,"name":





"cabbage"},    {"id":





9,"parentId":





3,"name":





"potato"},    {"id":





10,"parentId":





3,"name":





"lettuce"}    ]使用 'loadFilter' 创建树形菜单（Tree）    $('





#tt').tree({        url:





'data/tree6_data.json',        loadFilter:





function(rows){            return convert(rows);        }    });转换的实现    function convert(rows){        function exists(rows, parentId){            for(var i=0; i<rows.length; i++){                if (rows[i].id == parentId) return true;            }            return false;        }                var nodes = [];        // get the top level nodes        for(var i=0; i<rows.length; i++){            var row = rows[i];            if (!exists(rows, row.parentId)){                nodes.push({                    id:





row.id,                    text:





row.name                });            }        }                var toDo = [];        for(var i=0; i<nodes.length; i++){            toDo.push(nodes[i]);        }        while(toDo.length){            var node = toDo.shift();    // the parent node            // get the children nodes            for(var i=0; i<rows.length; i++){                var row = rows[i];                if (row.parentId == node.id){                    var child = {id:





row.id,text:





row.name};                    if (node.children){                        node.children.push(child);                    } else {                        node.children = [child];                    }                    toDo.push(child);                }            }        }        return nodes;    }下载 jQuery EasyUI 实例jeasyui-tree-tree6.zip