vue3+ts 绘制流程图 vueflow 附代码及效果图

已完成渲染流程图，自定义模板内容(上下分级),自定义样式，新增节点addRandomNode，点击修改节点nodeClickHandler(从父组件传值)

官网：https://vueflow.dev/guide/node.html#node-template
文档比较复杂，很多想找的方法没法一下就找到需要注意

我装了三个，如果npm安装报错可以试试yarn add

    "@vue-flow/background": "^1.2.0",
    "@vue-flow/core": "^1.20.2",
    "vue3-flowchart": "^0.19.1"

<template>
  <div style="height: 500px;">
    <VueFlow v-model="elements" @nodeClick="nodeClickHandler"  fit-view-on-init @edgeClick="clickadd"
      @edge-update="onEdgeUpdate" :style="{ background: 'transparent' }" :default-zoom="1.5">

      <Background :pattern-color="'#aaa'" gap="8" />
      

      <template #node-custom="props">
        <CustomNode :node="props"  />
      </template>
<!-- 新增 @edgeClick="clickadd"  -->
    </VueFlow>
  </div>
  <dynamic-modal :visible="visible" top="15vh" width="500px" :title="title" :form="addForm" :items="items" @submit="submit"
    @reset="reset" @close="close" />

  <dynamic-modal :visible="visible_edit" top="15vh" width="500px" :title="'修改节点'" :form="editForm" :items="items" @submit="submit2"
    @reset="reset" @close="close" />
</template>

 
<script setup>
import { ref, reactive, computed, watch , markRaw } from 'vue'
import { Panel, PanelPosition, VueFlow, useVueFlow , isNode,applyChanges} from '@vue-flow/core'
import { Background } from '@vue-flow/background'
import { onMounted } from 'vue'
import useLoading from '@/hooks/loading'
import dynamicModal from '@/components/modal/dynamicModal.vue';
import { Message } from '@arco-design/web-vue'
import { queryPostList } from '@/api/data-assets/base-assets.ts'
import { useI18n } from 'vue-i18n';
import router from '@/router';
import CustomNode  from './CustomNode.vue'

const props = defineProps(['processData'])
const { loading, setLoading } = useLoading(true);

const { t } = useI18n()

const { nodes, addNodes, updateEdge, removeEdges, getElements, getNode, addEdges, onConnect, dimensions } = useVueFlow()
onConnect((params) => addEdges(params))
const visible = ref(false)
const visible_edit = ref(false)
const title = ref('选择节点操作')
const img_params = ref({})
// const nodeTypes = {
//   custom: markRaw(CustomNode),
// }
let addForm = ref({
  nodeOperations: '',
  postNames:[],
  ccNames:[],
})
let editForm = ref({
  nodeOperations: '',
})
const op2 = [
  { label: '审批', value: '审批' },
  { label: '确认', value: '确认' },
  { label: '处理', value: '处理' },
]
let optionPost = ref([])
// 新增、编辑弹框
const items = reactive([
  
  { field: 'nodeOperations',width:24, label: computed(()=> t('data.departmentCollaboration.columns.process.flow_1')),disabled:true, type: 'radio_comm',option: op2, rules: [{ required: true, message: computed(()=> t('data.departmentCollaboration.columns.process.select')) }], placeholder: computed(()=> t('data.dictory.form.columns.desc.placeholder'))},
  { field: 'postIds', type: 'select', label: computed(()=> t('data.departmentCollaboration.columns.process.flow_2')),multiple:true,fieldNames: { label: 'postName', value: 'postId' }, rules: [{ required: true, message: computed(()=> t('data.departmentCollaboration.columns.process.select')) }],option: optionPost, placeholder: computed(()=> t('data.departmentCollaboration.columns.process.select')) },
  { field: 'ccIds', type: 'select', label: computed(()=> t('data.departmentCollaboration.columns.process.flow_3')),multiple:true,fieldNames: { label: 'postName', value: 'postId' }, rules: [{ required: true, message: computed(()=> t('data.departmentCollaboration.columns.process.select')) }],option: optionPost, placeholder: computed(()=> t('data.departmentCollaboration.columns.process.select')) }

])
// 提交方法
const submit = async(params)=> {
  
  // console.log(params,img_params.value)
  // let ccNames = []
  // params.ccIds.forEach(id=>{
  //   ccNames.push(optionPost.value.filter(i=>i.postId==id)[0].postName)
  // })
  // params.ccNames = ccNames
  // let postNames = []
  // params.postIds.forEach(id=>{
  //   postNames.push(optionPost.value.filter(i=>i.postId==id)[0].postName)
  // })
  // params.postNames = postNames
  try {
    await addRandomNode(params)
    visible.value = false
    Message.success("添加成功")
  } catch (error) {
    console.log(error)
  }
}

// 重置方法
const reset = ()=> {
  addForm.value = {
    remark:undefined
  }
  editForm.value = {
    remark:undefined
  }
}
const close = ()=> {
  visible.value = false
  visible_edit.value = false
  addForm.value = {
    remark:undefined
  }
  editForm.value = {
    remark:undefined
  }
}
function clickadd  (params){
  Message.info("暂无法新增")
  // img_params.value=params
  // console.log("点击",params)
  // visible.value = true
}
const handleEdgeMouseEnter = (edge) => {
  console.log('Mouse entered edge:', edge);
};
// let elements = ref([])
// elements = computed(() => {
//     return JSON.parse(JSON.stringify(props.processData))
//   })
const elements = ref(
  [
  {
    id: '1', type: 'input', position: { x: 400, y: 5 }, label: "发起人",
     data: {
      title: '发起人',
      content: '这是发起人的内容',
      ccIds:[],//抄送人IDs 实际为岗位数组
      postIds:[],//操作人IDs 实际为岗位数组
      postNames:[],
      ccNames:[],
      nodeOperations:"确认",//操作节点
    },
  },
 
  {
    id: '2', type: 'custom',  position: { x: 400, y: 100 }, label: "审批",
    // template: markRaw(OverwriteCustomNode),
    data: {
      ccIds:[],//抄送人IDs 实际为岗位数组
      postIds:[],//操作人IDs 实际为岗位数组
      postNames:[],
      ccNames:[],
      nodeOperations:"审批",//操作节点
    },
  },
  {
    id: '3', type: 'custom',  position: { x: 400, y: 250 }, label: "处理",
    data: {
      ccIds:[],//抄送人IDs 实际为岗位数组
      postIds:[],//操作人IDs 实际为岗位数组
      postNames:[],
      ccNames:[],
      nodeOperations:"处理",//操作节点
    },
  },
  {
    id: '4',type: 'custom',   position: { x: 400, y: 400 }, label: "确认",
    data: {
      ccIds:[],//抄送人IDs 实际为岗位数组
      postIds:[],//操作人IDs 实际为岗位数组
      postNames:[],
      ccNames:[],
      nodeOperations:"确认",//操作节点
    },
  },
  {
    id: '5', type: 'output', position: { x: 400, y: 550 }, label: "完成",
    data: {
      title: '流程结束',
      content: '这是流程结束的内容',
    },
  },

  { id: 'e1-2', source: '1', type: 'smoothstep', label: '＋', target: '2',
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },},

  { id: 'e2-3', source: '2', type: 'smoothstep', label: '＋', target: '3',
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },},

  { id: 'e3-4', source: '3', type: 'smoothstep', label: '＋', target: '4',
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },},

  { id: 'e4-5', source: '4', type: 'smoothstep', label: '＋', target: '5',
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },},
])
//取父组件的值
//elements.value = props.processData
// console.log(props.processData)
// 修改方法
const submit2 = async(params)=> {
  console.log("params",JSON.stringify(params))
  let ccNames = []
  JSON.parse(JSON.stringify(params.ccIds)).forEach(id=>{
    ccNames.push(optionPost.value.filter(i=>i.postId==id)[0].postName)
  })
  params.ccNames = ccNames
  let postNames = []
  params.postIds.forEach(id=>{
    postNames.push(optionPost.value.filter(i=>i.postId==id)[0].postName)
  })
  params.postNames = postNames

  console.log("params",JSON.stringify(params))
  console.log(elements.value,elements)
  elements.value.forEach(e => {
    if(e.id == img_params.value.node.id){
      // console.log("匹配到了")
      e.data = JSON.parse(JSON.stringify(params))
      e.label = e.data.nodeOperations +"<br/>"+ e.data.postNames
      // console.log(e)
    }
  });
  console.log(elements.value)
  visible_edit.value=false
  // try {
  //   await addRandomNode(params)
  //   visible.value = false
  //   Message.success("添加成功")
  // } catch (error) {
    
  // }
}
const nodeClickHandler = (params) => {
  console.log()
  console.log(JSON.stringify(params.node.data));
  // 如果是发起工单和流程结束，跳过
  if(params.node.label=="发起人" || params.node.label=="完成" ) return
  img_params.value=params
  console.log("点击",params)
  visible_edit.value = true
  editForm.value = params.node.data
};
// addNodes(node1)
// addEdges(edge1)

//新增一个节点
function addRandomNode(params) {
  console.log(img_params)
  //1.新建node，节点位置为(img_params.value.edge.events.sourceX+img_params.value.edge.events.targetX)/2-30,(img_params.value.edge.events.sourceY+img_params.value.edge.events.targetY)/2-15,
  //2.将当前edge线段的target改为新建的nodeid
  //3.新建一个edge线段，source为新建的nodeid，target为原有target，即img_params.value里面的
  //4.将当前新建的node节点以及往后的所有节点的y都新增150
  const nodeId = (nodes.value.length + 1).toString()+'add'
  // console.log(getNode,img_params.value.edge.source)
  // console.log(getNode,img_params.value.edge.source)
  // const source = getNode(img_params.value.edge.source)
  // console.log(source)
  const newNode = {
    id: nodeId,
    label: JSON.parse(JSON.stringify(params.nodeOperations)),
    type:'custom',
    // label: `新增Node: ${nodeId}`,
    position: { x: img_params.value.edge.sourceX-75, y: (img_params.value.edge.sourceY + img_params.value.edge.targetY) / 2 - 15 },
    // position: { x: (img_params.value.edge.sourceX + img_params.value.edge.targetX) / 2 - 30, y: (img_params.value.edge.sourceY + img_params.value.edge.targetY) / 2 - 15 },
    data:JSON.parse(JSON.stringify(params))
    // position: { x: Math.random() * dimensions.value.width, y: Math.random() * dimensions.value.height },
  }
  removeEdges(img_params.value.edge.id)
  const newEdge = {
    id: img_params.value.edge.id,
    source: img_params.value.edge.source,
    type: img_params.value.edge.type,
    label: img_params.value.edge.label,
    target: nodeId,
    updatable: img_params.value.edge.updatable,
    // events: { click: clickadd },
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },

  }
  const newEdge2 = {
    id: nodeId + 'add',
    source: nodeId,
    type: img_params.value.edge.type,
    label: img_params.value.edge.label,
    target: img_params.value.edge.target,
    updatable: img_params.value.edge.updatable,
    // events: { click: clickadd },
    labelBgPadding: [8, 4],
    labelStyle: { fill: '#fff', fontWeight: 700 },
    labelBgBorderRadius: 4,
    labelBgStyle: { fill: '#10b981', color: '#fff', fillOpacity: 1 },
  }
//   //找到当前指向的下一个节点
//   let index = elements.value.findIndex(item => item.id == img_params.value.edge.target)
//   // console.log(elements.value,img_params.value.edge.target)
//   // console.log(elements.value.findIndex(item => item.id == img_params.value.edge.target))
//   //将节点的y设置
//   for (let i = 0; i > index-1; i++) {
//     let node = elements.value[i]
//     if(isNode(node)){
//       console.log("是node")
//       node.position.y = node.position.y +153
//       // applyChanges(elements.value,{nodes:[node]})
//     }    
//   }
// console.log(elements.value)
  addNodes([newNode])
  addEdges([newEdge])
  addEdges([newEdge2])
}

//新增一个分支
function onEdgeUpdate({ edge, connection }) {
  console.log(edge, connection)
  return updateEdge(edge, connection)
}
const dosomething = ()=>{
  // return getElements.value
  return elements.value
}
onMounted(async() => {
  const a = { page: 1, pageSize: 1000 }
  try {
    const { data } = await queryPostList(a)
    optionPost.value = data.records
  } catch (err) {
    Message.error(err.message)
  }
})
watch(visible_edit, (newValue) => {
  // console.log(elements.value)
  if (!newValue) {
  // console.log("修改？？",newValue)
    // 可以在这里执行重新渲染操作
    elements.value = [...elements.value];
  // console.log("修elements改？？",elements.value)
  }
});
defineExpose({
  dosomething
})
</script>
 
<style>
/* these are necessary styles for vue flow */
@import "@vue-flow/core/dist/style.css";

/* this contains the default theme, these are optional styles */
@import "@vue-flow/core/dist/theme-default.css";

.custom-node {
  background-color: #f2f2f2;
  border: 1px solid #ccc;
  padding: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.node-title {
  font-weight: bold;
}

.node-content {
  margin-top: 4px;
}</style>