bpmn-js画流程图 (一)基本安装使用
1. 在页面上直接引用bpmn.js
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>BPMNJS</title> <!--CDN--> <script src="https://unpkg.com/bpmn-js@6.0.2/dist/bpmn-viewer.development.js"></script> <style> #canvas { height: 400px; } </style> </head> <body> <div id="canvas"></div> <script> var bpmnJS = new BpmnJS({ container: '#canvas' }); bpmnXML='<?xml version="1.0" encoding="UTF-8"?>\n' + '<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" id="sid-38422fae-e03e-43a3-bef4-bd33b32041b2" targetNamespace="http://bpmn.io/bpmn" exporter="bpmn-js (https://demo.bpmn.io)" exporterVersion="6.3.3">\n' + ' <process id="Process_1" isExecutable="false">\n' + ' <startEvent id="StartEvent_1y45yut" name="hunger noticed">\n' + ' <outgoing>SequenceFlow_0h21x7r</outgoing>\n' + ' </startEvent>\n' + ' <task id="Task_1hcentk" name="choose recipe">\n' + ' <incoming>SequenceFlow_0h21x7r</incoming>\n' + ' <outgoing>SequenceFlow_0wnb4ke</outgoing>\n' + ' </task>\n' + ' <sequenceFlow id="SequenceFlow_0h21x7r" sourceRef="StartEvent_1y45yut" targetRef="Task_1hcentk" />\n' + ' <exclusiveGateway id="ExclusiveGateway_15hu1pt" name="desired dish?">\n' + ' <incoming>SequenceFlow_0wnb4ke</incoming>\n' + ' </exclusiveGateway>\n' + ' <sequenceFlow id="SequenceFlow_0wnb4ke" sourceRef="Task_1hcentk" targetRef="ExclusiveGateway_15hu1pt" />\n' + ' </process>\n' + ' <bpmndi:BPMNDiagram id="BpmnDiagram_1">\n' + ' <bpmndi:BPMNPlane id="BpmnPlane_1" bpmnElement="Process_1">\n' + ' <bpmndi:BPMNShape id="StartEvent_1y45yut_di" bpmnElement="StartEvent_1y45yut">\n' + ' <omgdc:Bounds x="152" y="102" width="36" height="36" />\n' + ' <bpmndi:BPMNLabel>\n' + ' <omgdc:Bounds x="134" y="145" width="73" height="14" />\n' + ' </bpmndi:BPMNLabel>\n' + ' </bpmndi:BPMNShape>\n' + ' <bpmndi:BPMNShape id="Task_1hcentk_di" bpmnElement="Task_1hcentk">\n' + ' <omgdc:Bounds x="240" y="80" width="100" height="80" />\n' + ' </bpmndi:BPMNShape>\n' + ' <bpmndi:BPMNEdge id="SequenceFlow_0h21x7r_di" bpmnElement="SequenceFlow_0h21x7r">\n' + ' <omgdi:waypoint x="188" y="120" />\n' + ' <omgdi:waypoint x="240" y="120" />\n' + ' </bpmndi:BPMNEdge>\n' + ' <bpmndi:BPMNShape id="ExclusiveGateway_15hu1pt_di" bpmnElement="ExclusiveGateway_15hu1pt" isMarkerVisible="true">\n' + ' <omgdc:Bounds x="395" y="95" width="50" height="50" />\n' + ' <bpmndi:BPMNLabel>\n' + ' <omgdc:Bounds x="388" y="152" width="65" height="14" />\n' + ' </bpmndi:BPMNLabel>\n' + ' </bpmndi:BPMNShape>\n' + ' <bpmndi:BPMNEdge id="SequenceFlow_0wnb4ke_di" bpmnElement="SequenceFlow_0wnb4ke">\n' + ' <omgdi:waypoint x="340" y="120" />\n' + ' <omgdi:waypoint x="395" y="120" />\n' + ' </bpmndi:BPMNEdge>\n' + ' </bpmndi:BPMNPlane>\n' + ' </bpmndi:BPMNDiagram>\n' + '</definitions>'; // import diagram bpmnJS.importXML(bpmnXML, function(err) { if (!err) { console.log('success!'); // var canvas = bpmnJS.get('canvas') canvas.zoom('fit-viewport') } else { return console.error('could not import BPMN 2.0 diagram', err); } }); </script> </body> </html>
如上所示, 使用DNS加速直接引入bpmn.js, 然后本地指定一个容器(id为canvas的那个div), 接着用bpmn.js提供的方法importXML就可以解析xml字符串生成对应的工作流图。
2. 使用npm安装bpmn.js
首先需要安装bpmn-js
npm install bpmn-js --save-dev
安装好这个只能支持在线绘制工作流,而不能对工作流上的每个节点进行属性设置,这个时候需要安装bpmn-js的一个panel插件。
npm install bpmn-js-properties-panel --save-dev
示例代码可参见 https://github.com/-io/bpmn-js-examples 里的 properties-panel 示例工程。
运行效果如下
npm run dev