vue+element UI实现树形表格带复选框的示例代码

一：在component文件夹下新建如下treetable文件夹，里面有2个文件：

eval.js:将数据转换成树形数据

/**
 * @author: jianglei
 * @date: 2017-10-12 12:06:49
 */
"use strict";
import vue from "vue";
export default function treetoarray(
 data,
 expandall,
 parent = null,
 level = null
) {
 let tmp = [];
 array.from(data).foreach(function(record) {
 if (record._expanded === undefined) {
  vue.set(record, "_expanded", expandall);
 }
 let _level = 1;
 if (level !== undefined && level !== null) {
  _level = level + 1;
 }
 vue.set(record, "_level", _level);
 // 如果有父元素
 if (parent) {
  vue.set(record, "parent", parent);
 }
 tmp.push(record);
 if (record.child && record.child.length > 0) {
  const child = treetoarray(record.child, expandall, record, _level);
  tmp = tmp.concat(child);
 }
 });
 return tmp;
}

index.vue:树形表格组件

<template>
 <el-table ref="multipletable" :data="formatdata" :row-style="showrow" v-bind="$attrs"> <!-- @header-click="chooseall" -->
 <el-table-column :render-header="renderheader" width="50" align="center">
  <template slot-scope="scope">
  <el-checkbox v-model="scope.row.checks" @change="toselect(scope.row)"></el-checkbox>
  </template>
 </el-table-column>
 <el-table-column v-if="columns.length===0" width="150">
  <template slot-scope="scope">
  <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
  <span v-if="iconshow(0,scope.row)" class="tree-ctrl" @click="toggleexpanded(scope.$index)">
   <i v-if="!scope.row._expanded" class="el-icon-plus"/>
   <i v-else class="el-icon-minus"/>
  </span>
  {{ scope.$index }}
  </template>
 </el-table-column>
 <el-table-column v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width">
  <template slot-scope="scope">
  <!-- todo -->
  <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
  <span v-for="space in scope.row._level" v-if="index === 0" :key="space" class="ms-tree-space"/>
  <span v-if="iconshow(index,scope.row)" class="tree-ctrl" @click="toggleexpanded(scope.$index)">
   <i v-if="!scope.row._expanded" class="el-icon-plus"/>
   <i v-else class="el-icon-minus"/>
  </span>
  {{ scope.row[column.value] }}
  </template>
 </el-table-column>
 <slot/>
 </el-table>
</template>
 
<script>
/**
 auth: lei.j1ang
 created: 2018/1/19-13:59
*/
import treetoarray from "./eval";
export default {
 name: "treetable",
 data() {
 return {
  chooseson: true, //全选
  key: true //单个点击直到全部选中
 };
 },
 props: {
 /* eslint-disable */
 data: {
  type: [array, object],
  required: true
 },
 columns: {
  type: array,
  default: () => []
 },
 evalfunc: function,
 evalargs: array,
 expandall: {
  type: boolean,
  default: false
 }
 },
 computed: {
 // 格式化数据源
 formatdata: function() {
  let tmp;
  if (!array.isarray(this.data)) {
  tmp = [this.data];
  } else {
  tmp = this.data;
  }
  const func = this.evalfunc || treetoarray;
  const args = this.evalargs
  ? [tmp, this.expandall].concat(this.evalargs)
  : [tmp, this.expandall];
  return func.apply(null, args);
 }
 },
 methods: {
 showrow: function(row) {
  const show = row.row.parent
  ? row.row.parent._expanded && row.row.parent._show
  : true;
  row.row._show = show;
  return show
  ? "animation:treetableshow 1s;-webkit-animation:treetableshow 1s;"
  : "display:none;";
 },
 // 切换下级是否展开
 toggleexpanded: function(trindex) {
  const record = this.formatdata[trindex];
  record._expanded = !record._expanded;
 },
 // 图标显示
 iconshow(index, record) {
  return index === 0 && record.child && record.child.length > 0;
 },
 
 //设置表头全选
 renderheader(h, data) {
  return h("span", [
  h("input", {
   attrs: {
   id: "chooseall",
   type: "checkbox",
   style:
    "border: 1px solid #dcdfe6;border-radius: 2px;box-sizing: border-box;width: 14px;height: 14px;background-color: #fff;"
   }
  })
  ]);
 },
 //功能函数:选中部分子集
 setchildtobeselect(arr, key) {
  arr.foreach((v, i) => {
  v.checks = key;
  // v._expanded = key;//选中后展开子项
  if (v.child) {
   this.setchildtobeselect(v.child, v.checks);
  }
  });
 },
 //是否所有的都被选中
 isallchecked(arr) {
  arr.foreach((v, i) => {
  if (!v.checks) {
   this.key = false;
  }
  if (v.child) {
   this.isallchecked(v.child);
  }
  });
 },
 //设置父级为 未选中状态（父级的父级没改变-有bug）
 setparentfalse(arr, id, level) {
  arr.foreach((v, i) => {
  if (v._level == level - 1 && v.child) {
   v.child.foreach((val, ind) => {
   if (val.id == id) {
    v.checks = false;
    return false; //终止此次循环，减少循环次数
   }
   });
  }
  if (v.child) {
   this.setparentfalse(v.child, id, level);
  }
  });
 },
 //设置父级为 选中状态
 setparenttrue(arr, id, level) {
  arr.foreach((v, i) => {
  if (v._level == level - 1 && v.child) {
   let key = true;
   let sameidkey = false;
   v.child.foreach((val, ind) => {
   if (val.id == id) {
    //确保当前点击的在该父级内
    sameidkey = true;
   }
   if (!val.checks) {
    key = false;
   }
   });
   if (key && sameidkey) {
   v.checks = true;
   }
  }
  if (v.child) {
   this.setparentfalse(v.child, id, level);
  }
  });
 },
 //某个复选框被点击时
 toselect(row) {
  console.log(row);
  // row._expanded = row.checks;//选中后是否展开
  //1、若有子集先让子选中
  if (row.child) {
  this.setchildtobeselect(row.child, row.checks);
  }
  //2、然后判断是否全选中
  this.key = true; //重置为true，防止上次已经是false的状态
  this.isallchecked(this.formatdata);
  //3、设置多选框的状态
  if (!row.checks) {
  this.setparentfalse(this.formatdata, row.id, row._level); //设置父级选中的状态为false
  document.getelementbyid("chooseall").checked = false; //设置全选框的状态
  } else {
  this.setparenttrue(this.formatdata, row.id, row._level); //设置父级选中的状态为true
  }
  if (this.key) {
  document.getelementbyid("chooseall").checked = true; //设置全选框的状态
  }
 }
 },
 mounted() {
 this.$nexttick(() => {
  var that = this;
  const all = document.getelementbyid("chooseall");
  all.onchange = function(e) {
  console.log(all.checked);
  if (all.checked == true) {
   that.setchildtobeselect(that.formatdata, true);
  } else {
   that.setchildtobeselect(that.formatdata, false);
  }
  };
 });
 }
};
</script>
<style rel="stylesheet/css">
@keyframes treetableshow {
 from {
 opacity: 0;
 }
 to {
 opacity: 1;
 }
}
@-webkit-keyframes treetableshow {
 from {
 opacity: 0;
 }
 to {
 opacity: 1;
 }
}
</style>
 
<style scoped>
.ms-tree-space {
 position: relative;
 top: 1px;
 display: inline-block;
 font-style: normal;
 font-weight: 400;
 line-height: 1;
 width: 18px;
 height: 14px;
}
.ms-tree-space::before {
 content: "";
}
.processcontainer {
 width: 100%;
 height: 100%;
}
table td {
 line-height: 26px;
}
.tree-ctrl {
 position: relative;
 cursor: pointer;
 color: #2196f3;
 margin-left: -18px;
}
</style>

二：在需要的地方引入该组件：

例如：在component文件夹下新建a.vue:

<tree-table :data="data" :columns="columns" border/>

import treetable from "./treetable";
components: { treetable },
data() {
 return {
  columns: [
  {
   text: "事件",
   value: "event",
   width: 200
  },
  {
   text: "id",
   value: "id"
  }
  ],
  data: [
  {
   id: 0,
   event: "事件1",
   timeline: 50,
   comment: "无"
  },
  {
   id: 1,
   event: "事件1",
   timeline: 100,
   comment: "无",
   children: [
   {
    id: 2,
    event: "事件2",
    timeline: 10,
    comment: "无"
   },
   {
    id: 3,
    event: "事件3",
    timeline: 90,
    comment: "无",
    children: [
    {
     id: 4,
     event: "事件4",
     timeline: 5,
     comment: "无"
    },
    {
     id: 5,
     event: "事件5",
     timeline: 10,
     comment: "无"
    },
    {
     id: 6,
     event: "事件6",
     timeline: 75,
     comment: "无",
     children: [
     {
      id: 7,
      event: "事件7",
      timeline: 50,
      comment: "无",
      children: [
      {
       id: 71,
       event: "事件71",
       timeline: 25,
       comment: "xx"
      },
      {
       id: 72,
       event: "事件72",
       timeline: 5,
       comment: "xx"
      },
      {
       id: 73,
       event: "事件73",
       timeline: 20,
       comment: "xx"
      }
      ]
     },
     {
      id: 8,
      event: "事件8",
      timeline: 25,
      comment: "无"
     }
     ]
    }
    ]
   }
   ]
  }
  ]
 };
 },

最终效果：

这样就大工告成了，想要了解更多，可以关注 vue-element-admin，一个很不错的后台管理模版

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。