完整组件，作为路由可以直接看到效果：
<template>
<div class="box">
<div class="exam_structure">
<!-- <el-input v-model="filterText" placeholder="输入关键字进行过滤"> </el-input>
<el-button type="primary" size="small" class="add_new_question" @click="add_new_question">添加</el-button> -->
</div>
<div class="question_info_lists">
<el-tree
ref="tree"
:key="tree_key"
:data="treeData"
node-key="id"
:render-content="renderContent"
:expand-on-click-node="false"
:default-expanded-keys="defaultExpand"
:filter-node-method="filterNode"
></el-tree>
<el-row v-show="add_question_flag" class="add_question">
<el-col :span="12">
<el-input v-model="new_question_name" placeholder="请输入大题名称"></el-input>
</el-col>
<el-col :span="12">
<el-button size="mini" class="btn_sure" @click.stop="add_question_sure">确定</el-button>
<el-button size="mini" class="btn_cancel" @click.stop="add_question_cancel">取消</el-button>
</el-col>
</el-row>
</div>
</div>
</template>
<script>
export default {
name: 'Tree1',
data() {
return {
filterText: '',
treeData: [
{
id: 1,
label: '一级 1',
isEdit: false,
children: [
{
id: 4,
label: '二级 1-1',
isEdit: false,
children: [
{ id: 9, label: '三级 1-1-1', isEdit: false, children: [] },
{
id: 10,
label: '三级 1-1-2',
isEdit: false,
children: []
},
{
id: 11,
label: '三级 1-1-3',
isEdit: false,
children: []
}
]
},
{
id: 12,
label: '二级 1-2',
isEdit: false,
children: []
},
{
id: 13,
label: '二级 1-3',
isEdit: false,
children: []
}
]
},
{
id: 2,
label: '一级 2',
isEdit: false,
children: [
{ id: 5, label: '二级 2-1', isEdit: false, children: [] },
{
id: 6,
label: '二级 2-2',
isEdit: false,
children: []
}
]
},
{
id: 3,
label: '一级 3',
isEdit: false,
children: [
{ id: 7, label: '二级 3-1', isEdit: false, children: [] },
{
id: 8,
label: '二级 3-2',
isEdit: false,
children: []
}
]
}
],
add_question_flag: false,
new_question_name: '',
tree_key: 0,
defaultExpand: []
}
},
watch: {
filterText(val) {
this.$refs.tree.filter(val)
}
},
methods: {
filterNode(value, data) {
if (!value) return true
return data.label.indexOf(value) !== -1
},
// 添加新大题
add_new_question() {
this.add_question_flag = true
},
add_question_sure() {
// 确定
const nodeObj = { id: '', label: this.new_question_name, isEdit: false, children: [] }
this.treeData.push(nodeObj)
this.add_question_flag = false
},
add_question_cancel() {
// 取消
this.add_question_flag = false
this.new_question_name = ''
},
// 增加
append(store, node, data) {
let maxid = '20'
// 新增数据
const nodeapp = { id: ++maxid, label: '增加节点', isEdit: false, children: [] }
data.children.push(nodeapp)
if (!node.expanded) {
node.expanded = true
}
const parent = node.parent
const children = parent.data
const cIndex = children.findIndex(d => d.id === data.id)
const tempChildrenNodex2 = children[cIndex] // 拿到被添加的上一级
console.log(tempChildrenNodex2.children[cIndex - 1])
},
// 修改
nodeEdit(ev, store, data) {
data.isEdit = true
this.$nextTick(() => {
const $input =
ev.target.parentNode.parentNode.querySelector('input') ||
ev.target.parentElement.parentElement.querySelector('input')
!$input ? '' : $input.focus()
})
},
edit_sure(ev, data) {
const $input =
ev.target.parentNode.parentNode.querySelector('input') ||
ev.target.parentElement.parentElement.querySelector('input')
if (!$input) {
return false
} else {
data.label = $input.value
data.isEdit = false
}
},
// 节点删除
nodeDelete(node, data) {
const parent = node.parent
const children = parent.data.children || parent.data
const index = children.findIndex(d => d.id === data.id)
children.splice(index, 1)
},
// 节点上移
nodeUp(node, data) {
const parent = node.parent
const children = parent.data.children || parent.data
const cIndex = children.findIndex(d => d.id === data.id)
if (parent.level === 0 && cIndex === 0) {
return
} else if (parent.level !== 0 && cIndex === 0) {
// 不同父节点中移动
alert('不同父节点中移动')
// const parent2 = parent.parent
// const children2 = parent2.data.children || parent2.data
// const pIndex2 = parseInt(children2.findIndex(p => p.id === parent.data.id), 10) - 1
// if (pIndex2 < 0) return
// children2[pIndex2].children.push(data)
// children.splice(cIndex, 1)
// this.defaultExpand[0] = children2[pIndex2].id
} else if ((parent.level === 0 && cIndex !== 0) || (parent.level !== 0 && cIndex !== 0)) {
const tempChildrenNodex1 = children[cIndex - 1]
const tempChildrenNodex2 = children[cIndex]
this.$set(children, cIndex - 1, tempChildrenNodex2)
this.$set(children, cIndex, tempChildrenNodex1)
this.defaultExpand[0] = data.id
}
this.tree_key++
},
// 节点下移
nodeDown(store, node, data) {
const parent = node.parent
const children = parent.data.children || parent.data
const cIndex = children.findIndex(d => d.id === data.id)
const cLength = children.length - 1 // 最边上的节点
const allLevel = store.data.length - 1 // 树的深度
if (parent.level === allLevel && cIndex === cLength) {
// 最最末的节点
return
} else if (parent.level !== allLevel && cIndex === cLength) {
// 父节点不同
alert('不能移动')
// const parent2 = parent.parent
// const children2 = parent2.data.children || parent2.data
// const pIndex2 = parseInt((children2.findIndex(p => p.id === parent.data.id)), 10)
// if (pIndex2 === allLevel) return
// children2[pIndex2 + 1].children.push(data)
// children.splice(cIndex, 1)
// this.defaultExpand[0] = children2[pIndex2 + 1].id
} else if (
(parent.level === allLevel && cIndex !== cLength) ||
(parent.level !== allLevel && cIndex !== cLength)
) {
// 父节点相同
const tempChildrenNodex1 = children[cIndex + 1]
const tempChildrenNodex2 = children[cIndex]
this.$set(children, cIndex + 1, tempChildrenNodex2)
this.$set(children, cIndex, tempChildrenNodex1)
this.defaultExpand[0] = data.id
}
this.tree_key++
},
showOrEdit(data) {
if (data.isEdit) {
return <input type="text" value={data.label} on-blur={ev => this.edit_sure(ev, data)} />
} else {
return <span className="node_labe">{data.label}</span>
}
},
// 结构树操作group node,
renderContent(h, { node, data, store }) {
// console.log(node, '~~@#$$%', data, '88888888', store)
return (
<div
class="custom-tree-node"
on-mouseover={() => {
this.$set(data, 'isShow', true)
}}
on-mouseout={() => {
data.isShow = false
}}
>
<span>{this.showOrEdit(data)}</span>
<div v-show={data.isShow} class="tree_node_op" style="float: right;">
<i class="el-icon-edit" on-click={ev => this.nodeEdit(ev, store, data)}></i>
<i class="el-icon-delete" on-click={() => this.nodeDelete(node, data)}></i>
<i class="el-icon-upload2" on-click={() => this.nodeUp(node, data)}></i>
<i class="el-icon-download" on-click={() => this.nodeDown(store, node, data)}></i>
<i class="el-icon-plus" on-click={() => this.append(store, node, data)}></i>
</div>
</div>
)
}
}
}
</script>
<style lang="scss" scoped>
.box {
margin: 30px;
}
</style>