Tree 树形控件
用清晰的层级结构展示信息,可展开或折叠。
ts
import { createApp } from 'vue'
import { Tree as ElTree } from '@szhn/dh-design-pc'
const app = createApp()
app.use(ElTree)基础用法
基础的树形结构展示
<template>
<el-tree
style="max-width: 600px"
:data="data"
:props="defaultProps"
@node-click="handleNodeClick"
/>
</template>
<script lang="ts" setup>
import { Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
label: string
children?: Tree[]
}
const handleNodeClick = (data: Tree) => {
console.log(data)
}
const data: Tree[] = [
{
label: 'Level one 1',
children: [
{
label: 'Level two 1-1',
children: [
{
label: 'Level three 1-1-1',
},
],
},
],
},
{
label: 'Level one 2',
children: [
{
label: 'Level two 2-1',
children: [
{
label: 'Level three 2-1-1',
},
],
},
{
label: 'Level two 2-2',
children: [
{
label: 'Level three 2-2-1',
},
],
},
],
},
{
label: 'Level one 3',
children: [
{
label: 'Level two 3-1',
children: [
{
label: 'Level three 3-1-1',
},
],
},
{
label: 'Level two 3-2',
children: [
{
label: 'Level three 3-2-1',
},
],
},
],
},
]
const defaultProps = {
children: 'children',
label: 'label',
}
</script>可选择
适用于需要选择层级时使用。
WARNING
WARNING 在使用 show-checkbox 时,因为 check-on-click-leaf 默认值为 true, 最后一个树节点可以通过点击节点进行勾选。
<template>
<el-tree
style="max-width: 600px"
:props="props"
:load="loadNode"
lazy
show-checkbox
@check-change="handleCheckChange"
/>
</template>
<script lang="ts" setup>
import type { LoadFunction } from '@szhn/dh-design-pc'
import { Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
name: string
}
let count = 1
const props = {
label: 'name',
children: 'zones',
}
const handleCheckChange = (
data: Tree,
checked: boolean,
indeterminate: boolean
) => {
console.log(data, checked, indeterminate)
}
const loadNode: LoadFunction = (node, resolve) => {
if (node.level === 0) {
return resolve([{ name: 'Root1' }, { name: 'Root2' }])
}
if (node.level > 3) return resolve([])
let hasChild = false
if (node.data.name === 'region1') {
hasChild = true
} else if (node.data.name === 'region2') {
hasChild = false
} else {
hasChild = Math.random() > 0.5
}
setTimeout(() => {
let data: Tree[] = []
if (hasChild) {
data = [
{
name: `zone${count++}`,
},
{
name: `zone${count++}`,
},
]
} else {
data = []
}
resolve(data)
}, 500)
}
</script>懒加载自定义叶子节点
<template>
<el-tree
style="max-width: 600px"
:props="props"
:load="loadNode"
lazy
show-checkbox
/>
</template>
<script lang="ts" setup>
import type { LoadFunction } from '@szhn/dh-design-pc'
import { Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
name: string
leaf?: boolean
}
const props = {
label: 'name',
children: 'zones',
isLeaf: 'leaf',
}
const loadNode: LoadFunction = (node, resolve) => {
if (node.level === 0) {
return resolve([{ name: 'region' }])
}
if (node.level > 1) return resolve([])
setTimeout(() => {
const data: Tree[] = [
{
name: 'leaf',
leaf: true,
},
{
name: 'zone',
},
]
resolve(data)
}, 500)
}
</script>多次懒加载 (2.6.3)
<template>
<el-tree style="max-width: 600px" :props="props" :load="loadNode" lazy />
</template>
<script lang="ts" setup>
import type { LoadFunction } from '@szhn/dh-design-pc'
import { Tree as ElTree } from '@szhn/dh-design-pc'
const props = {
label: 'name',
children: 'zones',
isLeaf: 'leaf',
}
let time = 0
const loadNode: LoadFunction = (node, resolve, reject) => {
if (node.level === 0) {
return resolve([{ name: 'region' }])
}
time++
if (node.level >= 1) {
setTimeout(() => {
if (time > 3) {
return resolve([
{ name: 'zone1', leaf: true },
{ name: 'zone2', leaf: true },
{ name: 'zone3', leaf: true },
])
} else {
return reject()
}
}, 3000)
}
}
</script>禁用复选框
节点的复选框可以设置为禁用。
<template>
<el-tree
style="max-width: 600px"
:data="data"
:props="defaultProps"
show-checkbox
/>
</template>
<script lang="ts" setup>
import { Tree as ElTree } from '@szhn/dh-design-pc'
const defaultProps = {
children: 'children',
label: 'label',
disabled: 'disabled',
}
const data = [
{
id: 1,
label: 'Level one 1',
children: [
{
id: 3,
label: 'Level two 2-1',
children: [
{
id: 4,
label: 'Level three 3-1-1',
},
{
id: 5,
label: 'Level three 3-1-2',
disabled: true,
},
],
},
{
id: 2,
label: 'Level two 2-2',
disabled: true,
children: [
{
id: 6,
label: 'Level three 3-2-1',
},
{
id: 7,
label: 'Level three 3-2-2',
disabled: true,
},
],
},
],
},
]
</script>默认展开以及默认选中
树节点可以在初始化阶段被设置为展开和选中。
<template>
<el-tree
style="max-width: 600px"
:data="data"
show-checkbox
node-key="id"
:default-expanded-keys="[2, 3]"
:default-checked-keys="[5]"
:props="defaultProps"
/>
</template>
<script lang="ts" setup>
import { Tree as ElTree } from '@szhn/dh-design-pc'
const defaultProps = {
children: 'children',
label: 'label',
}
const data = [
{
id: 1,
label: 'Level one 1',
children: [
{
id: 4,
label: 'Level two 1-1',
children: [
{
id: 9,
label: 'Level three 1-1-1',
},
{
id: 10,
label: 'Level three 1-1-2',
},
],
},
],
},
{
id: 2,
label: 'Level one 2',
children: [
{
id: 5,
label: 'Level two 2-1',
},
{
id: 6,
label: 'Level two 2-2',
},
],
},
{
id: 3,
label: 'Level one 3',
children: [
{
id: 7,
label: 'Level two 3-1',
},
{
id: 8,
label: 'Level two 3-2',
},
],
},
]
</script>树节点的选择
<template>
<el-tree
ref="treeRef"
style="max-width: 600px"
:data="data"
show-checkbox
default-expand-all
node-key="id"
highlight-current
:props="defaultProps"
/>
<div class="flex flex-wrap gap-1 mt-2">
<el-button class="!ml-0" @click="getCheckedNodes">get by node</el-button>
<el-button class="!ml-0" @click="getCheckedKeys">get by key</el-button>
<el-button class="!ml-0" @click="setCheckedNodes">set by node</el-button>
<el-button class="!ml-0" @click="setCheckedKeys">set by key</el-button>
<el-button class="!ml-0" @click="resetChecked">reset</el-button>
</div>
</template>
<script lang="ts" setup>
import { ref } from 'vue'
import type { RenderContentContext, TreeInstance } from '@szhn/dh-design-pc'
import { Button as ElButton, Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
id: number
label: string
children?: Tree[]
}
type Node = RenderContentContext['node']
const treeRef = ref<TreeInstance>()
const getCheckedNodes = () => {
console.log(treeRef.value!.getCheckedNodes(false, false))
}
const getCheckedKeys = () => {
console.log(treeRef.value!.getCheckedKeys(false))
}
const setCheckedNodes = () => {
treeRef.value!.setCheckedNodes(
[
{
id: 5,
label: 'Level two 2-1',
},
{
id: 9,
label: 'Level three 1-1-1',
},
] as Node[],
false
)
}
const setCheckedKeys = () => {
treeRef.value!.setCheckedKeys([3], false)
}
const resetChecked = () => {
treeRef.value!.setCheckedKeys([], false)
}
const defaultProps = {
children: 'children',
label: 'label',
}
const data: Tree[] = [
{
id: 1,
label: 'Level one 1',
children: [
{
id: 4,
label: 'Level two 1-1',
children: [
{
id: 9,
label: 'Level three 1-1-1',
},
{
id: 10,
label: 'Level three 1-1-2',
},
],
},
],
},
{
id: 2,
label: 'Level one 2',
children: [
{
id: 5,
label: 'Level two 2-1',
},
{
id: 6,
label: 'Level two 2-2',
},
],
},
{
id: 3,
label: 'Level one 3',
children: [
{
id: 7,
label: 'Level two 3-1',
},
{
id: 8,
label: 'Level two 3-2',
},
],
},
]
</script>自定义节点内容
节点的内容支持自定义,可以在节点区添加按钮或图标等内容
<template>
<div class="custom-tree-container">
<p>Using render-content</p>
<el-tree
ref="treeRef1"
style="max-width: 600px"
:data="dataSource"
show-checkbox
node-key="id"
default-expand-all
:expand-on-click-node="false"
:render-content="renderContent"
/>
<p>Using scoped slot</p>
<el-tree
ref="treeRef2"
style="max-width: 600px"
:data="dataSource"
show-checkbox
node-key="id"
default-expand-all
:expand-on-click-node="false"
>
<template #default="{ node, data }">
<div class="custom-tree-node">
<span>{{ node.label }}</span>
<div>
<el-button type="primary" link @click="append(data)">
Append
</el-button>
<el-button
style="margin-left: 4px"
type="danger"
link
@click="remove(node, data)"
>
Delete
</el-button>
</div>
</div>
</template>
</el-tree>
</div>
</template>
<script lang="ts" setup>
import { ref } from 'vue'
import type { RenderContentContext, RenderContentFunction, TreeInstance } from '@szhn/dh-design-pc'
import { Button as ElButton, Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
id: number
label: string
children?: Tree[]
}
type Node = RenderContentContext['node']
type Data = RenderContentContext['data']
let id = 1000
const treeRef1 = ref<TreeInstance>()
const treeRef2 = ref<TreeInstance>()
const append = (data: Data) => {
const newChild = { id: id++, label: 'testtest', children: [] }
treeRef1.value?.append(newChild, data)
treeRef2.value?.append(newChild, data)
}
const remove = (node: Node, data: Data) => {
treeRef1.value?.remove(data)
treeRef2.value?.remove(data)
}
const renderContent: RenderContentFunction = (h, { node, data }) => {
return h(
'div',
{
class: 'custom-tree-node',
},
[
h('span', null, node.label),
h('div', null, [
h(
ElButton,
{
type: 'primary',
link: true,
onClick: () => append(data),
},
{
default: () => 'Append',
}
),
h(
ElButton,
{
type: 'danger',
link: true,
style: 'margin-left: 4px',
onClick: () => remove(node, data),
},
{
default: () => 'Delete',
}
),
]),
]
)
}
const dataSource = ref<Tree[]>([
{
id: 1,
label: 'Level one 1',
children: [
{
id: 4,
label: 'Level two 1-1',
children: [
{
id: 9,
label: 'Level three 1-1-1',
},
{
id: 10,
label: 'Level three 1-1-2',
},
],
},
],
},
{
id: 2,
label: 'Level one 2',
children: [
{
id: 5,
label: 'Level two 2-1',
},
{
id: 6,
label: 'Level two 2-2',
},
],
},
{
id: 3,
label: 'Level one 3',
children: [
{
id: 7,
label: 'Level two 3-1',
},
{
id: 8,
label: 'Level two 3-2',
},
],
},
])
</script>
<style>
.custom-tree-node {
flex: 1;
display: flex;
align-items: center;
justify-content: space-between;
font-size: 14px;
padding-right: 8px;
}
</style>自定义节点类名
节点的类名支持自定义。
<template>
<div class="custom-tree-node-container">
<el-tree
style="max-width: 600px"
:data="data"
show-checkbox
node-key="id"
default-expand-all
:expand-on-click-node="false"
:props="{ class: customNodeClass }"
/>
</div>
</template>
<script lang="ts" setup>
import type { TreeNodeData } from '@szhn/dh-design-pc'
import { Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
id: number
label: string
isPenultimate?: boolean
children?: Tree[]
}
const customNodeClass = ({ isPenultimate }: TreeNodeData) =>
isPenultimate ? 'is-penultimate' : ''
const data: Tree[] = [
{
id: 1,
label: 'Level one 1',
children: [
{
id: 4,
label: 'Level two 1-1',
isPenultimate: true,
children: [
{
id: 9,
label: 'Level three 1-1-1',
},
{
id: 10,
label: 'Level three 1-1-2',
},
],
},
],
},
{
id: 2,
label: 'Level one 2',
isPenultimate: true,
children: [
{
id: 5,
label: 'Level two 2-1',
},
{
id: 6,
label: 'Level two 2-2',
},
],
},
{
id: 3,
label: 'Level one 3',
isPenultimate: true,
children: [
{
id: 7,
label: 'Level two 3-1',
},
{
id: 8,
label: 'Level two 3-2',
},
],
},
]
</script>
<style>
.is-penultimate > .el-tree-node__content .el-tree-node__label {
color: #626aef;
}
.is-penultimate > .el-tree-node__children > div {
display: inline-block;
margin-right: 4px;
&:not(:first-child) .el-tree-node__content {
padding-left: 0px !important;
}
.el-tree-node__content {
padding-right: 16px;
}
}
</style>树节点过滤
树节点是可以被过滤的
<template>
<el-input
v-model="filterText"
class="w-60 mb-2"
placeholder="Filter keyword"
/>
<el-tree
ref="treeRef"
style="max-width: 600px"
class="filter-tree"
:data="data"
:props="defaultProps"
default-expand-all
:filter-node-method="filterNode"
/>
</template>
<script lang="ts" setup>
import { ref, watch } from 'vue'
import type { FilterNodeMethodFunction, TreeInstance } from '@szhn/dh-design-pc'
import { Input as ElInput, Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
[key: string]: any
}
const filterText = ref('')
const treeRef = ref<TreeInstance>()
const defaultProps = {
children: 'children',
label: 'label',
}
watch(filterText, (val) => {
treeRef.value!.filter(val)
})
const filterNode: FilterNodeMethodFunction = (value: string, data: Tree) => {
if (!value) return true
return data.label.includes(value)
}
const data: Tree[] = [
{
id: 1,
label: 'Level one 1',
children: [
{
id: 4,
label: 'Level two 1-1',
children: [
{
id: 9,
label: 'Level three 1-1-1',
},
{
id: 10,
label: 'Level three 1-1-2',
},
],
},
],
},
{
id: 2,
label: 'Level one 2',
children: [
{
id: 5,
label: 'Level two 2-1',
},
{
id: 6,
label: 'Level two 2-2',
},
],
},
{
id: 3,
label: 'Level one 3',
children: [
{
id: 7,
label: 'Level two 3-1',
},
{
id: 8,
label: 'Level two 3-2',
},
],
},
]
</script>手风琴模式
对于同一级的节点,每次只能展开一个
<template>
<el-tree
style="max-width: 600px"
:data="data"
:props="defaultProps"
accordion
@node-click="handleNodeClick"
/>
</template>
<script lang="ts" setup>
import { Tree as ElTree } from '@szhn/dh-design-pc'
interface Tree {
label: string
children?: Tree[]
}
const handleNodeClick = (data: Tree) => {
console.log(data)
}
const data: Tree[] = [
{
label: 'Level one 1',
children: [
{
label: 'Level two 1-1',
children: [
{
label: 'Level three 1-1-1',
},
],
},
],
},
{
label: 'Level one 2',
children: [
{
label: 'Level two 2-1',
children: [
{
label: 'Level three 2-1-1',
},
],
},
{
label: 'Level two 2-2',
children: [
{
label: 'Level three 2-2-1',
},
],
},
],
},
{
label: 'Level one 3',
children: [
{
label: 'Level two 3-1',
children: [
{
label: 'Level three 3-1-1',
},
],
},
{
label: 'Level two 3-2',
children: [
{
label: 'Level three 3-2-1',
},
],
},
],
},
]
const defaultProps = {
children: 'children',
label: 'label',
}
</script>可拖拽节点
通过 draggable 属性可让节点变为可拖拽
<template>
<el-tree
style="max-width: 600px"
:allow-drop="allowDrop"
:allow-drag="allowDrag"
:data="data"
draggable
default-expand-all
node-key="id"
@node-drag-start="handleDragStart"
@node-drag-enter="handleDragEnter"
@node-drag-leave="handleDragLeave"
@node-drag-over="handleDragOver"
@node-drag-end="handleDragEnd"
@node-drop="handleDrop"
/>
</template>
<script lang="ts" setup>
import type { AllowDropType, NodeDropType, RenderContentContext } from '@szhn/dh-design-pc'
import { Tree as ElTree } from '@szhn/dh-design-pc'
type Node = RenderContentContext['node']
const handleDragStart = (node: Node, ev: DragEvent) => {
console.log('drag start', node)
}
const handleDragEnter = (draggingNode: Node, dropNode: Node, ev: DragEvent) => {
console.log('tree drag enter:', dropNode.label)
}
const handleDragLeave = (draggingNode: Node, dropNode: Node, ev: DragEvent) => {
console.log('tree drag leave:', dropNode.label)
}
const handleDragOver = (draggingNode: Node, dropNode: Node, ev: DragEvent) => {
console.log('tree drag over:', dropNode.label)
}
const handleDragEnd = (
draggingNode: Node,
dropNode: Node | null,
dropType: NodeDropType,
ev: DragEvent
) => {
console.log('tree drag end:', dropNode && dropNode.label, dropType)
}
const handleDrop = (
draggingNode: Node,
dropNode: Node,
dropType: Exclude<NodeDropType, 'none'>,
ev: DragEvent
) => {
console.log('tree drop:', dropNode.label, dropType)
}
const allowDrop = (draggingNode: Node, dropNode: Node, type: AllowDropType) => {
if (dropNode.data.label === 'Level two 3-1') {
return type !== 'inner'
} else {
return true
}
}
const allowDrag = (draggingNode: Node) => {
return !draggingNode.data.label.includes('Level three 3-1-1')
}
const data = [
{
label: 'Level one 1',
children: [
{
label: 'Level two 1-1',
children: [
{
label: 'Level three 1-1-1',
},
],
},
],
},
{
label: 'Level one 2',
children: [
{
label: 'Level two 2-1',
children: [
{
label: 'Level three 2-1-1',
},
],
},
{
label: 'Level two 2-2',
children: [
{
label: 'Level three 2-2-1',
},
],
},
],
},
{
label: 'Level one 3',
children: [
{
label: 'Level two 3-1',
children: [
{
label: 'Level three 3-1-1',
},
],
},
{
label: 'Level two 3-2',
children: [
{
label: 'Level three 3-2-1',
},
],
},
],
},
]
</script>Tree API
属性
| 属性名 | 说明 | 类型 | 默认值 |
|---|---|---|---|
| data | 展示数据 | array | — |
| empty-text | 内容为空的时候展示的文本 | string | — |
| node-key | 每个树节点用来作为唯一标识的属性,整棵树应该是唯一的 | string | — |
| props | 配置选项,具体看下表 | object | — |
| render-after-expand | 是否在第一次展开某个树节点后才渲染其子节点 | boolean | true |
| load | 加载子树数据的方法,仅当 lazy 属性为true 时生效 | Function | — |
| render-content | 树节点的内容区的渲染 Function | Function | — |
| highlight-current | 是否高亮当前选中节点,默认值是 false。 | boolean | false |
| default-expand-all | 是否默认展开所有节点 | boolean | false |
| expand-on-click-node | 是否在点击节点的时候展开或者收缩节点, 默认值为 true,如果为 false,则只有点箭头图标的时候才会展开或者收缩节点。 | boolean | true |
| check-on-click-node | 是否在点击节点的时候选中节点,默认值为 false,即只有在点击复选框时才会选中节点。 | boolean | false |
| check-on-click-leaf 2.9.6 | 点击叶节点(最后一个子节点)时是否选中或取消选中节点。 | boolean | true |
| auto-expand-parent | 展开子节点的时候是否自动展开父节点 | boolean | true |
| default-expanded-keys | 默认展开的节点的 key 的数组 | array | — |
| show-checkbox | 节点是否可被选择 | boolean | false |
| check-strictly | 在显示复选框的情况下,是否严格的遵循父子不互相关联的做法,默认为 false | boolean | false |
| default-checked-keys | 默认勾选的节点的 key 的数组 | array | — |
| current-node-key | 当前选中的节点 | string / number | — |
| filter-node-method | 对树节点进行筛选时执行的方法, 返回 false 则表示这个节点会被隐藏 | Function | — |
| accordion | 是否每次只打开一个同级树节点展开 | boolean | false |
| indent | 相邻级节点间的水平缩进,单位为像素 | number | 18 |
| icon | 自定义树节点图标组件 | string / Component | — |
| lazy | 是否懒加载子节点,需与 load 方法结合使用 | boolean | false |
| draggable | 是否开启拖拽节点功能 | boolean | false |
| allow-drag | 判断节点能否被拖拽 如果返回 false ,节点不能被拖动 | Function | — |
| allow-drop | 拖拽时判定目标节点能否成为拖动目标位置。 如果返回 false ,拖动节点不能被拖放到目标节点。 type 参数有三种情况:'prev'、'inner' 和 'next',分别表示放置在目标节点前、插入至目标节点和放置在目标节点后 | Function | — |
Props
| Props | 说明 | 类型 | 默认值 |
|---|---|---|---|
| label | 指定节点标签为节点对象的某个属性值 | string / Function | — |
| children | 指定子树为节点对象的某个属性值 | string | — |
| disabled | 指定节点选择框是否禁用为节点对象的某个属性值 | string / Function | — |
| isLeaf | 指定节点是否为叶子节点,仅在指定了 lazy 属性的情况下生效 | string / Function | — |
| class | 自定义节点类名 | string / Function | — |
对外暴露的方法
| 方法 | 说明 | 回调参数 |
|---|---|---|
| filter | 过滤所有树节点,过滤后的节点将被隐藏 | 接收一个参数并指定为 filter-node-method 属性的第一个参数 |
| updateKeyChildren | 为节点设置新数据,只有当设置 node-key 属性的时候才可用 | (key, data) 接收两个参数: 1. 节点的 key 2. 新数据 |
| getCheckedNodes | 如果节点可以被选中,(show-checkbox 为 true), 本方法将返回当前选中节点的数组 | (leafOnly, includeHalfChecked) 接收两个布尔类型参数: 1. 默认值为 false. 若参数为 true, 它将返回当前选中节点的子节点 2. 默认值为 false. 如果参数为 true, 返回值包含半选中节点数据 |
| setCheckedNodes | 设置目前选中的节点,使用此方法必须设置 node-key 属性 | (nodes, leafOnly) 接收两个参数: 1. 要选中的节点对象构成的数组 2. 布尔类型的值 如果设置为 true,将只设置选中的叶子节点状态。 默认值是 false. |
| getCheckedKeys | 若节点可用被选中 (show-checkbox 为 true), 它将返回当前选中节点 key 的数组 | (leafOnly) 接收一个布尔类型参数,默认为 false. 若参数为 true, 它将返回当前选中节点的子节点 |
| setCheckedKeys | 设置目前选中的节点,使用此方法必须设置 node-key 属性 | (keys, leafOnly) 接收两个参数: 1. 一个需要被选中的多节点 key 的数组 2. 布尔类型的值 如果设置为 true,将只设置选中的叶子节点状态。 默认值是 false. |
| setChecked | 设置节点是否被选中, 使用此方法必须设置 node-key 属性 | (key/data, checked, deep) 接收三个参数: 1. 要选中的节点的 key 或者数据 2. 一个布尔类型参数表明是否选中. 3. 一个布尔类型的参数,用于指示是否为深层(deep)操作(注意:check-strictly 必须为 false)。 |
| getHalfCheckedNodes | 如果节点可用被选中 (show-checkbox 为 true), 它将返回当前半选中的节点组成的数组 | — |
| getHalfCheckedKeys | 若节点可被选中(show-checkbox 为 true),则返回目前半选中的节点的 key 所组成的数组 | — |
| getCurrentKey | 返回当前被选中节点的数据 (如果没有则返回 null) | — |
| getCurrentNode | 返回当前被选中节点的数据 (如果没有则返回 null) | — |
| setCurrentKey | 通过 key 设置某个节点的当前选中状态,使用此方法必须设置 node-key 属性 | (key, shouldAutoExpandParent=true) 1. 待被选节点的 key, 如果为 null, 取消当前选中的节点 2. 是否展开父节点 |
| setCurrentNode | 设置节点为选中状态,使用此方法必须设置 node-key 属性 | (node, shouldAutoExpandParent=true) 1. 待被选中的节点 2. 是否展开父节点 |
| getNode | 根据 data 或者 key 拿到 Tree 组件中的 node | (data) 节点的 data 或 key |
| remove | 删除 Tree 中的一个节点,使用此方法必须设置 node-key 属性 | (data) 要删除的节点的 data 或者 node 对象 |
| append | 为 Tree 中的一个节点追加一个子节点 | (data, parentNode) 1. 要追加的子节点的 data 2. 父节点的 data, key 或 node |
| insertBefore | 在 Tree 中给定节点前插入一个节点 | (data, refNode) 1. 要增加的节点的 data 2. 参考节点的 data, key 或 node |
| insertAfter | 在 Tree 中给定节点后插入一个节点 | (data, refNode) 1. 要增加的节点的 data 2. 参考节点的 data, key 或 node |
事件
| 方法名 | 说明 | 类型 |
|---|---|---|
| node-click | 当节点被点击的时候触发 | 四个参数:对应于节点点击的节点对象,TreeNode 的 node 属性, TreeNode和事件对象 |
| node-contextmenu | 当某一节点被鼠标右键点击时会触发该事件 | 共四个参数,依次为:event、传递给 data 属性的数组中该节点所对应的对象、节点对应的 Node、节点组件本身。 |
| check-change | 当复选框被点击的时候触发 | 共三个参数,依次为:传递给 data 属性的数组中该节点所对应的对象、节点本身是否被选中、节点的子树中是否有被选中的节点 |
| check | 点击节点复选框之后触发 | 共两个参数,依次为:传递给 data 属性的数组中该节点所对应的对象、树目前的选中状态对象,包含 checkedNodes、checkedKeys、halfCheckedNodes、halfCheckedKeys 四个属性 |
| current-change | 当前选中节点变化时触发的事件 | 共两个参数,依次为:当前节点的数据,当前节点的 Node 对象 |
| node-expand | 节点被展开时触发的事件 | 共三个参数,依次为:传递给 data 属性的数组中该节点所对应的对象、节点对应的 Node、节点组件本身 |
| node-collapse | 节点被关闭时触发的事件 | 共三个参数,依次为:传递给 data 属性的数组中该节点所对应的对象、节点对应的 Node、节点组件本身 |
| node-drag-start | 节点开始拖拽时触发的事件 | 共两个参数,依次为:被拖拽节点对应的 Node、event |
| node-drag-enter | 拖拽进入其他节点时触发的事件 | 共三个参数,依次为:被拖拽节点对应的 Node、所进入节点对应的 Node、event |
| node-drag-leave | 拖拽离开某个节点时触发的事件 | 共三个参数,依次为:被拖拽节点对应的 Node、所离开节点对应的 Node、event |
| node-drag-over | 在拖拽节点时触发的事件(类似浏览器的 mouseover 事件) | 共三个参数,依次为:被拖拽节点对应的 Node、当前进入节点对应的 Node、event |
| node-drag-end | 拖拽结束时(可能未成功)触发的事件 | 共四个参数,依次为:被拖拽节点对应的 Node、结束拖拽时最后进入的节点(可能为空)、被拖拽节点的放置位置(before、after、inner)、event |
| node-drop | 拖拽成功完成时触发的事件 | 共四个参数,依次为:被拖拽节点对应的 Node、结束拖拽时最后进入的节点、被拖拽节点的放置位置(before、after、inner)、event |
插槽
| 插槽名 | 描述 | Type |
|---|---|---|
| default | 自定义树节点的内容。 | object |
| empty 2.3.4 | 当数据为空时自定义的内容 | — |
