基于vue实现多功能树形结构组件的示例代码
作者：一点一木
一个优雅展示树形结构数据的 Vue 组件,递归渲染每个节点及其子节点,支持自定义颜色、文本和布局,通过独特的样式巧妙处理不同层级,为用户打造丰富的视觉盛宴,文中通过代码给大家介绍的非常详细,感兴趣的同学可以自己动手尝试一下
核心功能
- 递归渲染：组件可以递归地渲染每个节点及其子节点，形成树形结构；
- 自定义样式：支持通过传入的节点数据自定义节点颜色和文本；
- 动态布局：可以根据传入的属性决定节点是左布局、右布局还是左右布局；
- 层级颜色：根据节点的层级显示不同的颜色。
废话不多说，我们直接开始！
效果图：
首先，我们在components文件夹下新建一个组件PathoNode.vue，该组件将负责渲染每个节点及其子节点。
其中，LEVEL_COLORS 为不同层级节点定义了颜色，isLeaf 计算属性用于判断当前节点是否为叶子节点。
代码如下：
<template>
<div class="node-item" :class="{left: isLeft}">
<div class="node-item_not-leaf" v-if="!isLeaf">
<div class="node-name" :style="{background: node.color || LEVEL_COLORS[node.level] || LEVEL_COLORS[3]}" :class="{'round': node.level === 2}">{{node.text}}</div>
<div class="node-children">
<patho-node v-for="(childNode, i) in node.children" :key="'childNode' + i" :node="childNode" :isLeft="isLeft"/>
</div>
</div>
<div class="node-item_leaf" v-else>
<div class="node-name">{{node.text}}</div>
</div>
</div>
</template>
<script>
const LEVEL_COLORS = {
1: '#1A4843',
2: '#464885',
3: '#46857E',
4: '#857146',
5: '#6A8546',
6: '#854646',
7: '#818076',
8: '#979B33',
9: '#336E9B',
10: '#854683'
}
export default {
name: 'PathoNode',
props: {
node: {
type: Object,
default () {
return {}
}
},
isLeft: {
type: Boolean,
default: false
}
},
data () {
return {
LEVEL_COLORS
}
},
computed: {
isLeaf () {
return !(this.node.children && this.node.children.length > 0)
}
},
methods: {
}
}
</script>
<style lang="scss" scoped>
$border-color-primary: #B5BDC4;
$text-color-primary: #b4babf;
$color-black: #000000;
@mixin firstNode {
position: relative;
border: none;
}
@mixin rightNode {
position: relative;
padding-left: 10px;
border-left: 1px solid $border-color-primary;
}
@mixin leftNode {
position: relative;
padding: 0;
padding-right: 10px;
border: none;
border-right: 1px solid $border-color-primary;
}
@mixin rightHorizonLine {
content: '';
position: absolute;
top: 50%;
left: 0;
width: 10px;
border-top: 1px solid $border-color-primary;
}
@mixin leftHorizonLine {
@include rightHorizonLine;
left: auto;
right: 0;
}
@mixin beforeRightFirstChild {
bottom: 0;
border-radius: 4px 0 0 0;
border-left: 1px solid $border-color-primary;
}
@mixin beforeRightLastChild {
left: 0;
top: 0;
bottom: 50%;
border-radius: 0 0 0 4px;
border: none;
border-left: 1px solid $border-color-primary;
border-bottom: 1px solid $border-color-primary;
}
// 左边第一个child
@mixin beforeLeftFirstChild {
@include beforeRightFirstChild;
border: none;
border-radius: 0 4px 0 0;
border-top: 1px solid $border-color-primary;
border-right: 1px solid $border-color-primary;
}
// 左边最后一个child
@mixin beforeLeftLastChild {
@include beforeRightLastChild;
border-radius: 0 0 4px 0;
border: none;
border-right: 1px solid $border-color-primary;
border-bottom: 1px solid $border-color-primary;
}
@mixin beforeRightOnlyOneChild {
left: 0;
top: 50%;
bottom: auto;
border: 0;
border-radius: 0;
border-top: 1px solid $border-color-primary;
}
@mixin beforeLeftOnlyOneChild {
@include beforeRightOnlyOneChild;
left: auto;
right: 0;
}
.node-item {
display: flex;
position: relative;
flex-direction: row;
justify-content: flex-start;
@include rightNode;
&::before{
@include rightHorizonLine;
}
&:first-child{
@include firstNode;
&::before{
@include beforeRightFirstChild;
}
}
&:last-child{
border-left: none;
&::before{
@include beforeRightLastChild;
}
}
&:first-child:last-child{
border-left: none;
}
&:first-child:last-child::before{
@include beforeRightOnlyOneChild;
}
.node-name{
flex-shrink: 0;
display: inline-block;
font-size: 14px;
border-radius: 1px;
margin: 10px 0;
padding: 5px 20px;
width: auto;
line-height: 20px;
font-weight: 600;
height: auto;
border-radius: 3px;
color: $color-black;
&.round{
width: 64px;
height: 64px;
padding: 0;
border-radius: 50%;
line-height: 64px;
text-align: center;
}
}
.node-children{
@include rightNode;
border-left: none;
&::before{
@include rightHorizonLine;
}
}
.node-item_not-leaf{
display: flex;
flex-direction: row;
justify-content: flex-start;
align-items: center;
&::before{
border-left: 1px solid $border-color-primary;
}
}
.node-item_leaf{
.node-name{
background: $color-black;
color: $text-color-primary;
border: 1px solid $text-color-primary;
margin-right: 20px;
}
}
&.left{
@include leftNode;
&::before{
@include leftHorizonLine;
}
&:first-child{
@include firstNode;
}
&:first-child::before{
@include beforeLeftFirstChild;
}
&:last-child{
border: none;
&::before{
@include beforeLeftLastChild;
}
}
&:first-child:last-child{
border-right: none;
}
&:first-child:last-child::before{
@include beforeLeftOnlyOneChild;
}
.node-item_not-leaf{
&::before{
border: none;
border-right: 1px solid $border-color-primary;
}
}
.node-name{
&::after{
content: '\200E';
}
}
.node-children{
@include leftNode;
border-right: none;
&::before{
@include leftHorizonLine;
}
}
.node-item_leaf{
.node-name{
margin-right: 0;
margin-left: 20px;
}
}
}
// transition
.node-fade-enter-acitve, .node-fade-leave-active {
transition: all .5s;
}
.node-fade-enter, .node-fade-leave-to{
opacity: 0;
}
.node-fade-enter-to, .node-fade-leave {
opacity: 1;
}
}
</style>
节点组件部分负责定义单个节点的渲染结构，并通过递归调用<patho-node>组件处理子节点。当然，根据具体业务需求，你也可以进一步封装此文件成为专用的业务组件。
<template>
<div class="patho-tab" ref="pathoChartContainer">
<div class="patho-tab__zoom" @click="clickHandler">
<el-scrollbar style="height:100%; width:100%;">
<transition name="patho-chart">
<div class="patho-chart" :style="{ transform: `scale(${scaleRatio}) translate(${translateX}px, ${translateY}px)` }">
<div class="patho-chart__section patho-chart__section_left" v-if="leftDatas.length > 0">
<patho-node v-for="(node, i) in leftDatas" :key="'node' + i" :node="node" :isLeft="true" />
</div>
<div class="patho-chart__section patho-chart__section_center root-node" v-if="nodeData">{{ nodeData.text }}
</div>
<div class="patho-chart__section patho-chart__section_right " v-if="rightDatas.length > 0">
<patho-node v-for="(node, i) in rightDatas" :key="'node' + i" :node="node" :isLeft="false" />
</div>
</div>
</transition>
</el-scrollbar>
</div>
</div>
</template>
<script>
import pathoNode from '@/components/PathoNode.vue'
export default {
components: {
pathoNode
},
data() {
return {
scaleRatio: 1,
translateX: 0,
translateY: 0,
// 组织结构图数据
nodeData: {
"text": "综合分析",
"color": null,
"level": 1,
"children": [
{
"text": "血",
"color": "#9BBA5B",
"level": 2,
"children": [
{
"text": "活血化瘀",
"color": null,
"level": 3,
"children": [
{
"text": "岷归",
"color": null,
"level": 4,
"children": null
}
]
}
]
},
{
"text": "汗",
"color": "#C58080",
"level": 2,
"children": [
{
"text": "固涩_止汗",
"color": null,
"level": 3,
"children": [
{
"text": "白芍",
"color": null,
"level": 4,
"children": null
},
{
"text": "于朮",
"color": null,
"level": 4,
"children": null
}
]
}
]
}
// ...
]
}
}
},
computed: {
leftDatas() {
const children = this.nodeData.children || []
const len = children.length
return children.slice(0, Math.floor(len / 2))
},
rightDatas() {
const children = this.nodeData.children || []
const len = children.length
return children.slice(len / 2)
}
},
methods: {
clickHandler() {
if (this.scaleRatio === 1) {
this.scaleRatio = 1.2;
} else {
this.scaleRatio = 1;
}
}
}
}
</script>
<style lang="scss" scoped>
$border-color-primary: #B5BDC4;
$color-primary: #49B8A3;
$color-black: #000000;
@mixin rightHorizonLine {
content: '';
position: absolute;
top: 50%;
left: 0;
width: 10px;
border-top: 1px solid $border-color-primary;
}
@mixin leftHorizonLine {
@include rightHorizonLine;
left: auto;
right: 0;
}
.patho-tab {
display: flex;
flex-direction: column;
height: 100%;
position: relative;
&__body {
user-select: none;
overflow: hidden;
flex-grow: 1;
}
.patho-chart {
position: relative;
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
margin: 0 auto;
padding: 2em 0;
width: max-content;
cursor: pointer;
.patho-chart__section {
display: flex;
flex-direction: column;
flex-shrink: 0;
flex-basis: auto;
&.patho-chart__section_right {
position: relative;
padding: 0 0 0 10px;
&::before {
@include rightHorizonLine
}
}
&.patho-chart__section_left {
position: relative;
direction: rtl;
text-align: left;
justify-content: flex-end;
padding: 0 10px 0 0;
&::before {
@include leftHorizonLine;
}
}
}
.root-node {
width: 90px;
height: 90px;
border-radius: 50%;
background: #1A4843;
color: $color-black;
font-size: 16px;
font-weight: 600;
color: $color-primary;
text-align: center;
line-height: 90px;
}
}
}
/deep/ .el-scrollbar__view {
min-height: 100%;
}
.patho-tab__zoom {
position: fixed;
left: 0;
bottom: 0;
width: 100vw;
height: 100vh;
background: rgba(0, 0, 0, 0.8);
user-select: none;
z-index: 100;
.patho-chart {
margin: 0;
transform-origin: 0 0;
}
}
.patho-tab__no-datas {
margin-top: 20%;
text-align: center;
&_icon {
width: 200px;
}
&_text {
@include noDatas;
}
}
.patho-chart-enter-active,
.patho-chart-leave-active {
transition: opacity .5s;
}
.patho-chart-enter,
.patho-chart-leave-to {
opacity: 0;
}
.patho-chart-enter-to,
.patho-chart-leave {
opacity: 1;
}
</style>
通过以上设计，我们成功打造了一个多功能的树形结构组件，具备丰富的自定义选项，涵盖节点颜色、文本和布局等方面。这样的组件不仅能够实现功能性的树形结构展示，同时为用户提供了生动多彩的视觉体验。
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