Ⅰ- 壹 - 功能展示和使用需求

需求描述

使用LogicFlow来绘制兼容 BPMN2.0 规范的流程，使用react hooks 根据官方示例改的

下载图片功能只能在谷歌浏览器中使用（官方不支持其他的）

功能展示

目录结构

Ⅱ - 贰 - 封装代码

img文件

index.tsx

import LogicFlow from '@logicflow/core';
import {BpmnElement,BpmnXmlAdapter,Snapshot,Control,Menu,SelectionSelect,
} from '@logicflow/extension';
import './index.css';
import '@logicflow/extension/lib/style/index.css';
import '@logicflow/core/dist/style/index.css';
import { useEffect, useRef, useState } from 'react';
import BpmnPattern from './pattern';
import BpmnIo from './io';
const config = {stopScrollGraph: true,stopZoomGraph: true,metaKeyMultipleSelected: true,grid: {size: 10,type: 'dot',},keyboard: {enabled: true,},snapline: true,width: 1500,height: 800,
};const index = () => {const refContainer = useRef<any>();const [lfData, setLfData] = useState<any>(null);useEffect(() => {LogicFlow.use(BpmnElement);LogicFlow.use(BpmnXmlAdapter);LogicFlow.use(Snapshot);LogicFlow.use(Control);LogicFlow.use(Menu);LogicFlow.use(SelectionSelect);// use 必须放上面const lf = new LogicFlow({container: document.querySelector('#graph') as HTMLElement,// container: refContainer.current,...config,});lf.render();setLfData(() => lf);}, []);useEffect(() => {if (!lfData) return;// setIState(() => true);}, [lfData]);return (<div className="bpmn-example-container"><div id="graph" ref={refContainer} className="viewport"></div>{lfData && (<><BpmnPattern lf={lfData} /><BpmnIo lf={lfData} /></>)}</div>);
};
export default index;

index.css

.bpmn-example-container {position: relative;height: 100%;overflow: hidden;
}
.pattern {position: absolute;top: 10px;left: 10px;z-index: 111;display: flex;flex-direction: column;align-items: center;width: 60px;padding: 10px 0;color: #676768;font-size: 12px;background: rgba(255, 255, 255, 0.8);box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);-ms-user-select: none;-webkit-user-select: none;user-select: node;
}
.pattern-selection {width: 36px;height: 36px;background: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAAH6ji2bAAAABGdBTUEAALGPC/xhBQAAAOVJREFUOBGtVMENwzAIjKP++2026ETdpv10iy7WFbqFyyW6GBywLCv5gI+Dw2Bluj1znuSjhb99Gkn6QILDY2imo60p8nsnc9bEo3+QJ+AKHfMdZHnl78wyTnyHZD53Zzx73MRSgYvnqgCUHj6gwdck7Zsp1VOrz0Uz8NbKunzAW+Gu4fYW28bUYutYlzSa7B84Fh7d1kjLwhcSdYAYrdkMQVpsBr5XgDGuXwQfQr0y9zwLda+DUYXLaGKdd2ZTtvbolaO87pdo24hP7ov16N0zArH1ur3iwJpXxm+v7oAJNR4JEP8DoAuSFEkYH7cAAAAASUVORK5CYII=')center center no-repeat;cursor: pointer;opacity: 0.99;
}
.pattern-start {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}
.pattern-end {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}
.pattern-user {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}
.pattern-condition {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}
.pattern-circle {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}.pattern-rect {width: 36px;height: 36px;background: url('data:image/png;base64,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')center center no-repeat;cursor: grab;opacity: 0.99;
}
.graph-io {position: absolute;bottom: 10px;left: 10px;z-index: 9999;display: flex;padding: 10px;background: rgba(255, 255, 255, 0.8);box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
.graph-io > span {margin: 0 5px;cursor: pointer;
}
#upload-xml {position: relative;display: inline-block;overflow: hidden;cursor: pointer;
}
.upload {position: absolute;top: 0;left: 0;z-index: 99;cursor: pointer;opacity: 0;
}
.upload::-webkit-file-upload-button {cursor: pointer;
}

io.tsx


import React from 'react';
import LogicFlow from '@logicflow/core';
import { Input, Image } from 'antd';const downloadImg = require('./img/download.png');
const photo = require('./img/img.png');
const uploadImg = require('./img/upload.png');type IProps = {lf: LogicFlow;
};function download(filename: string, text: string) {var element = document.createElement('a');element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));element.setAttribute('download', filename);element.style.display = 'none';document.body.appendChild(element);element.click();document.body.removeChild(element);
}type FileEventTarget = EventTarget & { files: FileList };const BpmnIo: any = (props: IProps) => {const { lf } = props;const downloadXml = () => {const data = lf.getGraphData() as string;download('logic-flow.xml', data);};const uploadXml = (ev: React.ChangeEvent<HTMLInputElement>) => {const file = (ev.target as FileEventTarget).files[0];const reader = new FileReader();reader.onload = (event: ProgressEvent<FileReader>) => {if (event.target) {const xml = event.target.result as string;lf.render(xml);}};reader.readAsText(file); // you could also read images and other binaries};const downloadImage = async () => {const { lf } = props;lf.getSnapshot('', '#fff');// lf.extension.snapshot.getSnapshot();};return (<div className="graph-io"><span title="下载 XML" onMouseDown={() => downloadXml()}><Image preview={false} width={'10'} height={'10'} src={downloadImg} alt="下载XML" /></span><span id="download-img" title="下载图片" onMouseDown={() => downloadImage()}><Image preview={false} width={'10'} height={'10'} src={photo} alt="下载图片" /></span><span id="upload-xml" title="上传 XML"><Input type="file" className="upload" onChange={(ev) => uploadXml(ev)} /><Image preview={false} width={'10'} height={'10'} src={uploadImg} alt="上传XML" /></span></div>);
};export default BpmnIo;

pattern.tsx

import React, { useEffect } from 'react';
import LogicFlow from '@logicflow/core';type IProps = {lf: LogicFlow;
};const BpmnPattern = (props: IProps) => {const { lf } = props;useEffect(() => {lf &&lf.on('selection:selected', () => {lf.updateEditConfig({stopMoveGraph: false,});});}, [lf]);const addStartNode = () => {lf.dnd.startDrag({type: 'bpmn:startEvent',text: '开始',});};const addUserTask = () => {lf.dnd.startDrag({type: 'bpmn:userTask',});};const addServiceTask = () => {lf.dnd.startDrag({type: 'bpmn:serviceTask',});};const addGateWay = () => {lf.dnd.startDrag({type: 'bpmn:exclusiveGateway',});};const addEndNode = () => {lf.dnd.startDrag({type: 'bpmn:endEvent',text: '结束',});};const openSelection = () => {lf.updateEditConfig({stopMoveGraph: true,});};const onMouseDownFun = (type: any) => {switch (type) {case 'openSelection':lf.updateEditConfig({stopMoveGraph: true,});break;case 'addStartNode':lf.dnd.startDrag({type: 'bpmn:startEvent',text: '开始',});break;case 'addUserTask':lf.dnd.startDrag({type: 'bpmn:userTask',});break;case 'addServiceTask':lf.dnd.startDrag({type: 'bpmn:serviceTask',});break;case 'addGateWay':lf.dnd.startDrag({type: 'bpmn:exclusiveGateway',});break;case 'addEndNode':lf.dnd.startDrag({type: 'bpmn:endEvent',text: '结束',});break;case 'circle':lf.dnd.startDrag({type: 'circle',text: '圆形',});break;case 'rect':lf.dnd.startDrag({type: 'rect',text: '矩形',});break;default:break;}};return (<div className="pattern"><div className="pattern-selection" onMouseDown={() => onMouseDownFun('openSelection')} /><div>选区</div><div className="pattern-start" onMouseDown={() => onMouseDownFun('addStartNode')} /><div>开始</div><div className="pattern-user" onMouseDown={() => onMouseDownFun('addUserTask')}></div><div>用户任务</div><div className="pattern-user" onMouseDown={() => onMouseDownFun('addServiceTask')}></div><div>系统任务</div><div className="pattern-circle" onMouseDown={() => onMouseDownFun('circle')}></div><div>圆形</div><div className="pattern-rect" onMouseDown={() => onMouseDownFun('rect')}></div><div>矩形</div><div className="pattern-condition" onMouseDown={() => onMouseDownFun('addGateWay')}></div><div>条件判断</div><div className="pattern-end" onMouseDown={() => onMouseDownFun('addEndNode')}></div><div>结束</div></div>);
};export default BpmnPattern;

Ⅲ - 叁 - 使用

import Bpmn from './components/bpmn/index';
const Demo = () => {return <Bpmn></Bpmn>;
};export default Demo;

LogicFlow 来绘制兼容 BPMN2.0 规范的流程 (React hooks版)相关推荐

BPMN2.0规范及流程引擎选型方案
BPMN2.0规范及流程引擎选型方案一.基本概念二.BPMN意义三.主要元素 3.1 活动任务子流程调用活动事件子流程事务 3.2 网关排他网关包容网关并行网关事件网关复杂网 ...
BPMN2.0规范简述
BPMN2.0规范简介主要图元启动事件结束事件顺序流任务网关流程图例简介 BPMN的全称为Business Process Model And Notation,中文为业务流程模型与 ...
（二）BPMN2.0规范介绍——2事件 Events
目录一.事件定义 1. 定时器事件定义 Timer Event Definitions (1)定义 (2)timeDate (3)timeDuration (4)timeCycle (5)ISO 8 ...
小白学流程引擎-FLowable(五) — BPMN2.0模型规范
前言: 不用到处百度BPMN2的博客了,本篇文章带你系统掌握BPMN2规范的核心知识点.全文2万字,全覆盖BPMN2知识点,图文并茂,泡杯咖啡,慢慢细品- 一.BPMN是什么 BPMN(Busines ...
BPMN2.0协议简介
一.BPMN是什么如果想了解BPMN是什么,就先需要了解BPM是什么. BPM(Business Process Managment)--"通过建模.自动化.管理和优化流程,打破跨部门跨系 ...
深入浅出了解BPM、BPMN、BPMN2.0
BPM.BPMN.BPMN2.0概念介绍基本概念 BPM(Business Process Management)业务流程管理,从管理业务流程的角度来说,我们现有的IT系统大多数都属于这一类,比如供 ...
基于BPMN2.0的工单系统架构设计（下）
版权声明: 本文为博主原创文章,未经博主允许不得转载.关注公众号技术汇(ID: jishuhui_2015) 可联系到作者. 在上两篇文章中,介绍了BPMN2.0和工作流定义语言(以下简称WDL),以 ...
【A】兼容Core3.0后 Natasha 的隔离域与热编译操作。
文章转载授权级别:A 预计阅读时间:15分钟一. 2.0预览版本增加了哪些功能大部分为底层的升级优化,例如: 引擎兼容 Core3.0 优化编译流程,增加编译前语法检测及日志,统 ...
BPMN 2.0规范详解
2019独角兽企业重金招聘Python工程师标准>>> 转载地址:http://www.mossle.com/docs/jbpm4devguide/html/bpmn2.html 第 ...

LogicFlow 来绘制兼容 BPMN2.0 规范的流程 (React hooks版)

Ⅰ- 壹 - 功能展示和使用需求

需求描述

功能展示

目录结构

Ⅱ - 贰 - 封装代码

img文件

index.tsx

index.css

io.tsx

pattern.tsx

Ⅲ - 叁 - 使用

LogicFlow 来绘制兼容 BPMN2.0 规范的流程 (React hooks版)相关推荐

最新文章

热门文章