树表格的实现

树表格的实现
https://www.cnblogs.com/yuwenjing0727/p/9487779.html

有时候我们会遇到表格树的展示，类似于下图的需求：

其中组件的封装主要在table-tree文件夹内：

main.vue的内容如下：

<template>
  <el-table :data="formatData"
            :stripe="option.stripe"
            :row-style="showRow"
            :row-class-name="rowClassName"
            v-bind="$attrs"
            :border="border">
    <el-table-column v-if="columns.length===0"
                     width="150">
      <template slot-scope="scope">
        <span v-for="space in scope.row._level"
              class="ms-tree-space"
              :key="space"></span>
        <span class="tree-ctrl"
              v-if="iconShow(0,scope.row)"
              @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded"
             class="el-icon-plus"></i>
          <i v-else
             class="el-icon-minus"></i>
        </span>
        {{scope.$index}}
      </template>
    </el-table-column>
    <el-table-column v-else
                     v-for="(column, index) in columns"
                     :key="column.value"
                     :label="column.text"
                     :width="column.width">
      <template slot-scope="scope">
        <span v-if="index === 0"
              v-for="space in scope.row._level"
              class="ms-tree-space"
              :key="space"></span>
        <span class="tree-ctrl"
              v-if="iconShow(index,scope.row)"
              @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded"
             class="el-icon-plus"></i>
          <i v-else
             class="el-icon-minus"></i>
        </span>
        {{scope.row[column.value]}}
      </template>
    </el-table-column>
    <slot></slot>
  </el-table>
</template>

<script>
import treeToArray from "./eval";
export default {
  name: "AvueTreeTable",
  props: {
    option: {
      type: Object,
      required: true
    },
    rowClassName: Function,
    evalFunc: Function,
    evalArgs: Array
  },
  data() {
    return {};
  },
  created() {},
  computed: {
    data: function() {
      return this.option.data || [];
    },
    columns: function() {
      return this.option.columns || [];
    },
    expandAll: function() {
      return this.option.expandAll;
    },
    border: function() {
      return this.option.border || true;
    },
    // 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
        ? Array.concat([tmp, this.expandAll], 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.children && record.children.length > 0;
    }
  }
};
</script>
<style rel="stylesheet/css">
@keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-webkit-keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
</style>

<style lang="scss" rel="stylesheet/scss" scoped>
$color-blue: #2196f3;
$space-width: 18px;
.ms-tree-space {
  position: relative;
  top: 1px;
  display: inline-block;
  font-style: normal;
  font-weight: 400;
  line-height: 1;
  width: $space-width;
  height: 14px;
  &::before {
    content: "";
  }
}
.processContainer {
  width: 100%;
  height: 100%;
}
table td {
  line-height: 26px;
}

.tree-ctrl {
  position: relative;
  cursor: pointer;
  color: $color-blue;
  margin-left: -$space-width;
}
</style>

eval.js的内容如下：

/**
* @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.children && record.children.length > 0) {
      const children = treeToArray(record.children, expandAll, record, _level)
      tmp = tmp.concat(children)
    }
  })
  return tmp
}

index.js的内容如下：

import TableTree from './src/main';

/* istanbul ignore next */
TableTree.install = function(Vue) {
    Vue.component(TableTree.name, TableTree);
};

export default TableTree;

在其他组件内只需要引入main.vue即可,

js中option变量为：

option: {
        expandAll: true,
        columns: [
          {
            text: '事件',
            value: 'event',
            width: 200
          },
          {
            text: 'ID',
            value: 'id'
          },
          {
            text: '时间线',
            value: 'timeLine'
          },
          {
            text: '备注',
            value: 'comment'
          }
        ],
        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'
                      }
                    ]
                  }
                ]
              }
            ]
          }
        ]
      }

哈哈哈，这样就实现了表格树

但是有时候我们要自定义表格的列，如下图：

实现方式如下（底层封装组件不变，只是在引用的组件内做些改变即可）：

<tree-table :option="option">
        <el-table-column label="事件">
          <template slot-scope="scope">
            <span style="color:sandybrown">{{scope.row.event}}</span>
            <el-tag>{{scope.row.timeLine+'ms'}}</el-tag>
          </template>
        </el-table-column>
        <el-table-column label="时间线">
          <template slot-scope="scope">
            <el-tooltip effect="dark"
                        :content="scope.row.timeLine+'ms'"
                        placement="left">
              <div class="processContainer">
                <div class="process"
                     :style="{ width:scope.row._width * 500+'px',
              background:scope.row._width>0.5?'rgba(233,0,0,.5)':'rgba(0,0,233,0.5)',
              marginLeft:scope.row._marginLeft * 500+'px' }">
                  <span style="display:inline-block"></span>
                </div>
              </div>
            </el-tooltip>
          </template>
        </el-table-column>
        <el-table-column label="操作"
                         width="200">
          <template slot-scope="scope">
            <el-button type="text"
                       @click="message(scope.row)">点击</el-button>
          </template>
        </el-table-column>
      <tree-table>


option: {
        data: {
          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'
                    }
                  ]
                }
              ]
            }
          ]
        }
      }