<template>
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<el-table-column :prop="prop" v-bind="$attrs">
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<template slot-scope="scope">
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<span @click.prevent="toggleHandle(scope.$index, scope.row)" :style="childStyles(scope.row)">
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<i :class="iconClasses(scope.row)" :style="iconStyles(scope.row)"></i>
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{{ scope.row[prop] }}
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</span>
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</template>
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</el-table-column>
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</template>
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<script>
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import isArray from 'lodash/isArray'
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export default {
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name: 'table-tree-column',
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props: {
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prop: {
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type: String
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},
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treeKey: {
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type: String,
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default: 'id'
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},
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parentKey: {
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type: String,
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default: 'parentId'
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},
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levelKey: {
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type: String,
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default: '_level'
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},
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childKey: {
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type: String,
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default: 'children'
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}
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},
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methods: {
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childStyles (row) {
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return { 'padding-left': (row[this.levelKey] > 1 ? row[this.levelKey] * 7 : 0) + 'px' }
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},
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iconClasses (row) {
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return [ !row._expanded ? 'el-icon-caret-right' : 'el-icon-caret-bottom' ]
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},
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iconStyles (row) {
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return { 'visibility': this.hasChild(row) ? 'visible' : 'hidden' }
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},
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hasChild (row) {
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return (isArray(row[this.childKey]) && row[this.childKey].length >= 1) || false
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},
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// 切换处理
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toggleHandle (index, row) {
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if (this.hasChild(row)) {
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var data = this.$parent.store.states.data.slice(0)
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data[index]._expanded = !data[index]._expanded
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if (data[index]._expanded) {
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data = data.splice(0, index + 1).concat(row[this.childKey]).concat(data)
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} else {
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data = this.removeChildNode(data, row[this.treeKey])
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}
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this.$parent.store.commit('setData', data)
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this.$nextTick(() => {
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this.$parent.doLayout()
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})
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}
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},
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// 移除子节点
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removeChildNode (data, parentId) {
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var parentIds = isArray(parentId) ? parentId : [parentId]
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if (parentId.length <= 0) {
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return data
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}
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var ids = []
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for (var i = 0; i < data.length; i++) {
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if (parentIds.indexOf(data[i][this.parentKey]) !== -1 && parentIds.indexOf(data[i][this.treeKey]) === -1) {
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data[i]._expanded = false
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ids.push(data.splice(i, 1)[0][this.treeKey])
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i--
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}
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}
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return this.removeChildNode(data, ids)
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}
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}
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}
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</script>
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