Vue3 流程图组件库 Vue Flow 简单使用

官网

Vue Flow 官网
Vue Flow GitHub

安装

npm i --save @vue-flow/core
 
yarn add @vue-flow/core
 
pnpm i @vue-flow/core

使用

<template>
  <VueFlow v-model="elements" />
</template>
 
<script setup>
import { VueFlow  } from '@vue-flow/core'
 
const elements = ref([
  // Nodes
  // An input node, specified by using `type: 'input'`
  { id: '1', type: 'input', label: 'Node 1', position: { x: 250, y: 5 } },
 
  // Default nodes, you can omit `type: 'default'`
  { id: '2', label: 'Node 2', position: { x: 100, y: 100 }, },
  { id: '3', label: 'Node 3', position: { x: 400, y: 100 } },
 
  // An output node, specified by using `type: 'output'`
  { id: '4', type: 'output', label: 'Node 4', position: { x: 400, y: 200 } },
 
  // Edges
  // Most basic edge, only consists of an id, source-id and target-id
  { id: 'e1-3', source: '1', target: '3' },
 
  // An animated edge
  { id: 'e1-2', source: '1', target: '2', animated: true },
])
</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";
</style>

常用功能：

1. 画布居中

import { VueFlow, useVueFlow } from "@vue-flow/core";
const { onPaneReady } = useVueFlow();
const state = reactive({
  instance: null,
});
onPaneReady((instance) => {
  instance.fitView();
  // 将对象缓存
  state.instance = instance;
});
 
// 设置缩放级别
state.instance.fitView({ offset: { y: 50 } });
state.instance.zoomTo(1);

2. 点击事件

  <VueFlow
    v-model="flowElement"
    :style="{ background: 'transparent' }"
    :default-zoom="1"
    fit-view-on-init
    @nodeClick="nodeClickHandler"
  />
  const nodeClickHandler = (props) => {
    const node = props.node;
    console.log(node.id);
  };