ELement-UI之树形表格（treeTable&&treeGrid）

'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
}

<template>
<div>
<el-table :data="formatData" :row-style="showRow" v-bind="$attrs" @row-click="singleClick"
style="width: 100%;height: 700px;overflow: hidden" tooltip-effect="dark"
>
<el-table-column v-if="columns.length===0" width="150">
<template slot-scope="scope">
<span v-for="space in scope.row._level" class="ms-tree-space" :key="space"></span>
<span class="tree-ctrl" v-if="iconShow(0,scope.row)" @click="toggleExpanded(scope.$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>
</div>
</template><script> import treeToArray from './eval' export default {
name: 'treeTable',
props: {
data: {
type: [Array, Object],
required: true
},
columns: {
type: Array,
default: () => []
},
evalFunc: Function,
evalArgs: Array,
expandAll: {
type: Boolean,
default: false
},
singleClick: Function,
},
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 ? Array.concat([tmp, this.expandAll], this.evalArgs) : [tmp, this.expandAll];
return func.apply(null, args)//赋值function里前两位值data与expandAll
},
},
methods: {
showRow(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(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>
/*$color-blue:*/
/*$space-width: */
.ms-tree-space {
position: relative;
top: 1px;
display: inline-block;
font-style: normal;
font-weight: 400;
line-height: 1;
width: 18px;
height: 14px; &
::before {
content: ""
} }
.processContainer {
width: 100%;
height: 100%;
} table td {
line-height: 26px;
} .tree-ctrl {
position: relative;
cursor: pointer;
color: #2196F3;
margin-left: -18px;
} .el-table__body tr.current-row > td {
background: rgba(185, 221, 249, .75) !important;
}
</style>

## 写在前面
此组件仅提供一个创建TreeTable的解决思路## prop说明
#### *data*
**必填** 原始数据,要求是一个数组或者对象
```javascript
[{
key1: value1,
key2: value2,
children: [{
key1: value1
},
{
key1: value1
}]
},
{
key1: value1
}]
```
或者
```javascript
{
key1: value1,
key2: value2,
children: [{
key1: value1
},
{
key1: value1
}]
}
```#### columns
列属性,要求是一个数组 1. text: 显示在表头的文字
2. value: 对应data的key。treeTable将显示相应的value
3. width: 每列的宽度，为一个数字(可选) 如果你想要每个字段都有自定义的样式或者嵌套其他组件，columns可不提供，直接像在el-table一样写即可，如果没有自定义内容，提供columns将更加的便捷方便 如果你有几个字段是需要自定义的，几个不需要，那么可以将不需要自定义的字段放入columns，将需要自定义的内容放入到slot中，详情见后文
```javascript
[{
value:string,
text:string,
width:number
},{
value:string,
text:string,
width:number
}]
```#### expandAll
是否默认全部展开，boolean值，默认为false#### evalFunc
解析函数，function，非必须 如果不提供，将使用默认的[evalFunc](./eval.js) 如果提供了evalFunc,那么会用提供的evalFunc去解析data，并返回treeTable渲染所需要的值。如何编写一个evalFunc，请参考[*eval.js*](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/components/TreeTable/eval.js)或[*customEval.js*](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customEval.js)#### evalArgs
解析函数的参数，是一个数组 **请注意，自定义的解析函数参数第一个为this.data，第二个参数为， this.expandAll,你不需要在evalArgs填写。一定记住，这两个参数是强制性的，并且位置不可颠倒** *this.data为需要解析的数据，this.expandAll为是否默认展开* 如你的解析函数需要的参数为`(this.data, this.expandAll,1,2,3,4)`，那么你只需要将`[1,2,3,4]`赋值给`evalArgs`就可以了 如果你的解析函数参数只有`(this.data, this.expandAll)`,那么就可以不用填写evalArgs了 具体可参考[*customEval.js*](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customEval.js)的函数参数和[customTreeTable](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customTreeTable.vue)的`evalArgs`属性值 ## slot
这是一个自定义列的插槽。 默认情况下，treeTable只有一行行展示数据的功能。但是一般情况下，我们会要给行加上一个操作按钮或者根据当行数据展示不同的样式，这时我们就需要自定义列了。请参考[customTreeTable](https://github.com/PanJiaChen/vue-element-admin/blob/master/src/views/example/table/treeTable/customTreeTable.vue)，[实例效果](http://panjiachen.github.io/vue-element-admin/#/example/table/custom-tree-table) `slot`和`columns属性`可同时存在,columns里面的数据列会在slot自定义列的左边展示 ## 其他
如果有其他的需求，请参考[el-table](http://element-cn.eleme.io/#/en-US/component/table)的api自行修改index.vue

findRow(data, row) {//data 编辑之后的数据源 row选中的行
for (let i = 0; i < data.length; i++) {
if (data[i].children.length > 0) {
if (data[i].value === row.value) {//查找编辑之后对应的行新数据
this.$refs.singleTable.selectRow(data[i]);//设置高亮行
this.row = data[i];//个人需要使用选中的数据
} else {
this.findRow(data[i].children, row);//递归查找
}
} else {//没有子级直接比较
if (data[i].value === row.value) {
this.$refs.singleTable.selectRow(data[i]);
this.row = data[i];
}
}
}
}