vxe-table中树形结构

如图，同事让帮忙实现一个需求

从二级树节点开始，同时选中的只能有一个二级树节点，选中的二级树节点之下的子节点都可以被选中。否则不能被选中

直接上代码

需要注意的是，文中树状图传递的数据是打平的数据，设置代码是下图，而不是树状图!!

javascript 复制代码

:tree-config="{transform: true, rowField: 'cguid', parentField: 'cparentid'}"

上述的这一点非常重要

下面的全乎的数据图

html 复制代码

<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <!-- import CSS -->
  <!-- 引入样式 -->
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/vxe-table@legacy/lib/style.css">
  <!-- 引入vue -->
  <script src="https://cdn.jsdelivr.net/npm/vue@2"></script>
  <!-- 引入组件 -->
  <script src="https://cdn.jsdelivr.net/npm/xe-utils"></script>
  <script src="https://cdn.jsdelivr.net/npm/vxe-table@3.6.9"></script>
  <script src="data.js"></script>
</head>

<body>
  <div id="app">
    <vxe-table ref="treeNode" resizable :tree-config="{transform: true, rowField: 'cguid', parentField: 'cparentid'}" :data="tableData"
      :checkbox-config="{labelField: 'cguid', highlight: true,visibleMethod:()=>true,checkMethod:()=>true}"
      @checkbox-change="selectChangeEvent">
      <vxe-column type="checkbox" title="ID" width="280" tree-node></vxe-column>
      <vxe-column field="cname" title="Name"></vxe-column>
    </vxe-table>
  </div>
</body>
1：删除
2:节点禁用
3:筛选
<script>
  new Vue({
    el: '#app',
    data: function () {
      return {
        tableData: [], 
        chooseDataTree: null,//选中的树节点的内容
        data2tree: [],//将打平数据封装成树结构
      }
    },
    created() {
      this.tableData = dataList;
      //将数据改为树状结构
      children = getJsonTree(dataList, '000000');
      //遍历需要这种结构
      this.data2tree = {
        cguid: "000000",
        children,
      }
    },
    methods: {
      selectChangeEvent({ $table, indeterminates, row, records }) {
        console.log(arguments) 
        //将当前选中的数据 被选中子节点到root的数据
        this.handleCheckChange([...records, ...indeterminates],row)
      },
      handleCheckChange(data,row) {
        //整理成树状图 
        let chooseTree = getJsonTree(data, '000000') 
        //当前选中节点是不是在第一次选中的树节点中
        let bool = this.checkMethod({row,chooseTree,chooseList:data})
        console.log('bool:',bool)
        //不再就不让勾选，同时提示
        if(!bool){
          this.$refs.treeNode.setCheckboxRow(row,false)
          VXETable.modal.message('当前无法被选中')
        }
      }, 
      checkMethod({ chooseList,row ,chooseTree}) {
        //有选中的数据
        if (chooseList.length > 0 ) { 
          //已经存在选中的tree
          if(this.chooseDataTree){
            //已经选中的tree中是否存在当前选中的项
            let haveBool = hasChildNode(this.chooseDataTree, row.cguid);
            return haveBool
          }
          //获取选中的树表格 
          let chooseTreeData = chooseTree[0];
          //从树表格中获取第二级的节点（只有选中节点数据）
          let leve2Item = chooseTreeData.children[0];
          //从完整的树表中获取完整的指定节点数据
          let getThenTree = getLeafNode(this.data2tree, leve2Item.cguid); 
          //将选中的二级节点保存起来 用于校验
          this.setChooseDataTree(getThenTree);
          //检查当前节点是不是在选中的二级节点之中 
          let haveBool = hasChildNode(getThenTree, row.cguid);
          console.log('getThenTree:',getThenTree.cname,getThenTree);
          console.log('row:',row.cname,row)
          return haveBool
        } else {
          console.log('选中的内容空空如也')
          //将选中内容置空
          this.setChooseDataTree(null);
          return true
        }
      },
      //设置选中后的数据内容
      setChooseDataTree(data){
        this.chooseDataTree = data
      }
    }

  })

  //讲打平的数据组将组为树状图
  function getJsonTree(data, cparentid) {
    var result = [], temp;
    for (var i = 0; i < data.length; i++) {
      if (data[i].cparentid == cparentid) {
        if (cparentid === "000000") data[i]['disabled'] = true;
        var obj = { "name": data[i].cname, "id": data[i].cguid };
        obj = Object.assign(obj, data[i]);
        temp = this.getJsonTree(data, data[i].cguid);
        if (temp.length > 0) {
          obj.children = temp;
        }
        result.push(obj);
      }
    }
    return result;
  }
  //指定的节点中是否包含相应的子节点
  function hasChildNode(root, cguid) {
    if (root == null) {
      return false;
    }
    if (root.cguid === cguid) {
      return true;
    }
    let found = false;
    if (root.children && root.children.length > 0) {
      root.children.forEach(child => {
        if (hasChildNode(child, cguid)) {
          found = true;
        }
      });
    }
    return found;
  }
  //从树的表格中获取指定字节点内容数据
  function getLeafNode(root, cguid) {
    if (root == null) {
      return null;
    }
    if (root.cguid == cguid) {
      return root;
    }
    let result = null;
    if (root.children && root.children.length > 0) {
      root.children.forEach(child => {
        const leafNode = getLeafNode(child, cguid);
        if (leafNode != null) {
          result = leafNode;
        }
      });
    }
    return result;
  }



</script>

</html>

json打平的数据结构是

javascript 复制代码

const dataList = [
    {
        "cguid": "5422",
        "ccode": "01",
        "cname": "01 资产",
        "cparentid": "000000",
        "ileaf": "0"
    },
    {
        "cguid": "70",
        "ccode": "1004",
        "cname": "1004 汇总科目",
        "cparentid": "5422",
        "ileaf": "0"
    },
    {
        "cguid": "78",
        "ccode": "100401",
        "cname": "100401 汇总科目1",
        "cparentid": "70",
        "ileaf": "1"
    },
    {
        "cguid": "95",
        "ccode": "100402",
        "cname": "100402 汇总科目2",
        "cparentid": "70",
        "ileaf": "1"
    },
    {
        "cguid": "47",
        "ccode": "100403",
        "cname": "100403 汇总科目3",
        "cparentid": "70",
        "ileaf": "1"
    },
    {
        "cguid": "87",
        "ccode": "100404",
        "cname": "100404 汇总科目4",
        "cparentid": "70",
        "ileaf": "0"
    },
    {
        "cguid": "97",
        "ccode": "10040401",
        "cname": "10040401 汇总科目4-1",
        "cparentid": "87",
        "ileaf": "1"
    },
    {
        "cguid": "41",
        "ccode": "90000201",
        "cname": "90000201 B2c1",
        "cparentid": "31",
        "ileaf": "1"
    },
    {
        "cguid": "77",
        "ccode": "90000202",
        "cname": "90000202 B2c2",
        "cparentid": "31",
        "ileaf": "1"
    },
    {
        "cguid": "428",
        "ccode": "1001",
        "cname": "1001 库xxx",
        "cparentid": "422",
        "ileaf": "1"
    },
    {
        "cguid": "430",
        "ccode": "1002",
        "cname": "1002 银xxx",
        "cparentid": "422",
        "ileaf": "1"
    },
    
]