使用 AntV X6 + vue 实现单线流程图
X6 是 AntV 旗下的图编辑引擎，提供了一系列开箱即用的交互组件和简单易用的节点定制能力，方便我们快速搭建 DAG 图、ER 图、流程图等应用。
官方文档
安装
yarn add @antv/x6@1.34.6
Tips： 目前 X6 有 1.x 和 2.x 两个版本，因为官方文档的示例代码都是 1.x 版本的，所以本文档也是基于 1.x 版本的，如果你使用的是 2.x 版本，可以参考官方文档。
常用 API
| API | 说明 | 使用方法 |
|---|---|---|
| Graph | 图实例 | const graph=new Graph() |
| graph.zoomTo | 缩放图形 | graph.zoomTo(0.8) |
| graph.centerContent | 图形居中 | graph.centerContent() |
| graph.getCell | 获取节点 | graph.getCell(node.id) |
| graph.addCell | 新增节点 | graph.addCell([node1,edge1,node2,node3]) |
| graph.removeCells | 删除节点 | graph.removeCells(cell) |
| graph.createEdge | 创建连接线 | graph.createEdge(node1,node2) |
| graph.removeEdge | 删除连接线 | graph.removeEdge(edge.id) |
| graph.getNodes | 获取所有节点 | graph.getNodes() |
| graph.getEdges | 获取所有连接线 | graph.getEdges() |
| Graph.registerNod | 自定义元素样式 | 可查看文档 |
demo 代码（以下为 vue 实现单线流程图示例）
实现效果
vue 代码
Tips： 示例代码需安装 dagre 和 insert-css 依赖
<template><div id="container"></div>
</template>
<script setup lang="ts">import { Graph, Cell, Node, Color, Dom } from '@antv/x6'import dagre from 'dagre'import insertCss from 'insert-css'import { ref, reactive, computed, watch, onMounted, onUnmounted } from 'vue'const male ='https://gw.alipayobjects.com/mdn/rms_43231b/afts/img/A*kUy8SrEDp6YAAAAAAAAAAAAAARQnAQ'const female ='https://gw.alipayobjects.com/mdn/rms_43231b/afts/img/A*f6hhT75YjkIAAAAAAAAAAAAAARQnAQ'let graph, nodes, edges// 自定义节点，使用的是 svg格式Graph.registerNode('org-node',{width: 260,height: 88,markup: [{tagName: 'rect',attrs: {class: 'card',},},{tagName: 'image',attrs: {class: 'image',},},{tagName: 'text',attrs: {class: 'rank',},},{tagName: 'text',attrs: {class: 'name',},},{tagName: 'g',attrs: {class: 'btn add',},children: [{tagName: 'circle',attrs: {class: 'add',},},{tagName: 'text',attrs: {class: 'add',},},],},{tagName: 'g',attrs: {class: 'btn del',},children: [{tagName: 'circle',attrs: {class: 'del',},},{tagName: 'text',attrs: {class: 'del',},},],},],attrs: {'.card': {rx: 10,ry: 10,refWidth: '100%',refHeight: '100%',fill: '#5F95FF',stroke: '#5F95FF',strokeWidth: 1,pointerEvents: 'visiblePainted',},'.image': {x: 16,y: 16,width: 56,height: 56,opacity: 0.7,},'.rank': {refX: 0.95,refY: 0.5,fill: 'blue',fontFamily: 'Courier New',fontSize: 13,textAnchor: 'end',textVerticalAnchor: 'middle',},'.name': {refX: 0.95,refY: 0.7,fill: '#fff',fontFamily: 'Arial',fontSize: 14,fontWeight: '600',textAnchor: 'end',},'.btn.add': {refDx: -16,refY: 16,event: 'node:add',},'.btn.del': {refDx: -44,refY: 16,event: 'node:delete',},'.btn > circle': {r: 10,fill: 'transparent',stroke: '#fff',strokeWidth: 1,},'.btn.add > text': {fontSize: 20,fontWeight: 800,fill: '#fff',x: -5.5,y: 7,fontFamily: 'Times New Roman',text: '+',},'.btn.del > text': {fontSize: 28,fontWeight: 500,fill: '#fff',x: -4.5,y: 6,fontFamily: 'Times New Roman',text: '-',},},},true,)// 自定义边Graph.registerEdge('org-edge',{zIndex: -1,attrs: {line: {strokeWidth: 2,stroke: '#A2B1C3',sourceMarker: null,targetMarker: null,},},},true,)let i = 1// 监听自定义事件function setup() {graph.on('node:add', ({ e, node }) => {e.stopPropagation()const member = createNode('新建字段' + i, '新建字段' + i, Math.random() < 0.5 ? male : female)i++graph.freeze()const { preEdge, nextEdge, preNode, nextNode } = getPreAndNextNodeEdge(node.id)if (nextEdge) {graph.removeEdge(nextEdge.id)graph.addCell([createEdge(member, nextNode)])}graph.addCell([member, createEdge(node, member)])layout()})graph.on('node:delete', ({ e, node }) => {e.stopPropagation()graph.freeze()const { preEdge, nextEdge, preNode, nextNode } = getPreAndNextNodeEdge(node.id)if (preEdge) {graph.removeEdge(preEdge.id)}if (nextEdge) {graph.removeEdge(nextEdge.id)}if (preEdge && nextEdge) {graph.addCell([createEdge(preNode, nextNode)])}graph.removeNode(node.id)layout()})}function updateEdges() {edges = nodes.reduce((arr, node, index) => {if (index === 0) {return []}arr.push(createEdge(nodes[index - 1], node))return arr}, [])console.log('edges', edges)}function getPreAndNextNodeEdge(id: string) {let preEdge, nextEdge, preNode, nextNodeconst edges = graph.getEdges()edges.forEach(edge => {const _preId = edge.store.previous.source.cellconst _nextId = edge.store.previous.target.cellif (_preId === id) {nextEdge = edgenextNode = graph.getCell(_nextId)}if (_nextId === id) {preEdge = edgepreNode = graph.getCell(_preId)}})return { preEdge, nextEdge, preNode, nextNode }}// 自动布局function layout() {const nodes = graph.getNodes()const edges = graph.getEdges()const g = new dagre.graphlib.Graph()g.setGraph({ nodesep: 16, ranksep: 16 })g.setDefaultEdgeLabel(() => ({}))const width = 260const height = 90nodes.forEach(node => {g.setNode(node.id, { width, height })})edges.forEach(edge => {const source = edge.getSource()const target = edge.getTarget()g.setEdge(source.cell, target.cell)})dagre.layout(g)graph.freeze()g.nodes().forEach(id => {const node = graph.getCell(id) as Nodeif (node) {const pos = g.node(id)node.position(pos.x, pos.y)}})edges.forEach(edge => {const source = edge.getSourceNode()!const target = edge.getTargetNode()!const sourceBBox = source.getBBox()const targetBBox = target.getBBox()console.log(sourceBBox, targetBBox)if (sourceBBox.x !== targetBBox.x) {const gap = targetBBox.y - sourceBBox.y - sourceBBox.heightconst fix = sourceBBox.heightconst y = sourceBBox.y + fix + gap / 2edge.setVertices([{ x: sourceBBox.center.x, y },{ x: targetBBox.center.x, y },])} else {edge.setVertices([])}})graph.unfreeze()}function createNode(rank: string, name: string, image: string) {return graph.createNode({shape: 'org-node',attrs: {'.image': { xlinkHref: image },'.rank': {text: Dom.breakText(rank, { width: 160, height: 45 }),},'.name': {text: Dom.breakText(name, { width: 160, height: 45 }),},},})}function createEdge(source: Cell, target: Cell) {return graph.createEdge({shape: 'org-edge',source: { cell: source.id },target: { cell: target.id },})}onMounted(() => {// 定义样式// 我们用 insert-css 演示引入自定义样式// 推荐将样式添加到自己的样式文件中// 若拷贝官方代码，别忘了 npm install insert-cssinsertCss(` .x6-cell {cursor: default;}.x6-node .btn {cursor: pointer;}`)// 创建画布graph = new Graph({container: document.getElementById('container')!,scroller: true,interacting: false,width: 800,height: 600,})nodes = [createNode('董事长', '审批', male),createNode(' CEO', '呵呵', female),createNode('小李', '描述', male),]updateEdges()graph.resetCells([...nodes, ...edges])layout()graph.zoomTo(0.8)graph.centerContent()setup()})onUnmounted(() => {graph.dispose()})
</script><style scoped></style>
