ProcessViewer.vue
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<template>
<div class="my-process-designer">
<div class="my-process-designer__container">
<div class="my-process-designer__canvas" ref="bpmn-canvas"></div>
</div>
</div>
</template>
<script>
import BpmnViewer from "bpmn-js/lib/Viewer";
import DefaultEmptyXML from "./plugins/defaultEmpty";
export default {
name: "MyProcessViewer",
componentName: "MyProcessViewer",
props: {
value: String, // xml 字符串
prefix: {
type: String,
default: "camunda"
},
taskData: {
type: Array,
default: () => []
}
},
data() {
return {
xml: '',
tasks: [],
};
},
mounted() {
this.xml = this.value;
this.tasks = this.taskData;
// 初始化
this.initBpmnModeler();
this.createNewDiagram(this.xml);
this.$once("hook:beforeDestroy", () => {
if (this.bpmnModeler) this.bpmnModeler.destroy();
this.$emit("destroy", this.bpmnModeler);
this.bpmnModeler = null;
});
// 初始模型的监听器
this.initModelListeners();
},
watch: {
value: function (newValue) { // 在 xmlString 发生变化时，重新创建，从而绘制流程图
this.xml = newValue;
this.createNewDiagram(this.xml);
},
taskData: function (newTaskData) {
this.tasks = newTaskData;
this.createNewDiagram(this.xml);
}
},
methods: {
initBpmnModeler() {
if (this.bpmnModeler) return;
this.bpmnModeler = new BpmnViewer({
container: this.$refs["bpmn-canvas"],
bpmnRenderer: {
}
})
},
/* 创建新的流程图 */
async createNewDiagram(xml) {
// 将字符串转换成图显示出来
let newId = `Process_${new Date().getTime()}`;
let newName = `业务流程_${new Date().getTime()}`;
let xmlString = xml || DefaultEmptyXML(newId, newName, this.prefix);
try {
// console.log(this.bpmnModeler.importXML);
let { warnings } = await this.bpmnModeler.importXML(xmlString);
if (warnings && warnings.length) {
warnings.forEach(warn => console.warn(warn));
}
// 高亮流程图
await this.highlightDiagram();
} catch (e) {
console.error(e);
// console.error(`[Process Designer Warn]: ${e?.message || e}`);
}
},
/* 高亮流程图 */
async highlightDiagram() {
let activityList = this.tasks;
if (activityList.length === 0) {
return;
}
// 参考自 https://gitee.com/tony2y/RuoYi-flowable/blob/master/ruoyi-ui/src/components/Process/index.vue#L222 实现
// 再次基础上，增加不同审批结果的颜色等等
let canvas = this.bpmnModeler.get('canvas');
let todoActivity = activityList.find(m => !m.endTime) // 找到待办的任务
let endActivity = activityList[activityList.length - 1] // 找到结束任务
this.bpmnModeler.getDefinitions().rootElements[0].flowElements?.forEach(n => {
let activity = activityList.find(m => m.key === n.id) // 找到对应的活动
if (n.$type === 'bpmn:UserTask') { // 用户任务
if (!activity) {
return;
}
if (activity.task) {
const result = activity.task.result;
if (result === 1) {
canvas.addMarker(n.id, 'highlight-todo');
} else if (result === 2) {
canvas.addMarker(n.id, 'highlight');
} else if (result === 3) {
canvas.addMarker(n.id, 'highlight-reject');
} else if (result === 4) {
canvas.addMarker(n.id, 'highlight-cancel');
}
}
n.outgoing?.forEach(nn => {
let targetTask = activityList.find(m => m.key === nn.targetRef.id)
if (targetTask) {
canvas.addMarker(nn.id, targetTask.endTime ? 'highlight' : 'highlight-todo');
} else if (nn.targetRef.$type === 'bpmn:ExclusiveGateway') {
// canvas.addMarker(nn.id, 'highlight');
canvas.addMarker(nn.id, activity.endTime ? 'highlight' : 'highlight-todo');
canvas.addMarker(nn.targetRef.id, activity.endTime ? 'highlight' : 'highlight-todo');
} else if (nn.targetRef.$type === 'bpmn:EndEvent') {
if (!todoActivity && endActivity.key === n.id) {
canvas.addMarker(nn.id, 'highlight');
canvas.addMarker(nn.targetRef.id, 'highlight');
}
if (!activity.endTime) {
canvas.addMarker(nn.id, 'highlight-todo');
canvas.addMarker(nn.targetRef.id, 'highlight-todo');
}
}
});
} else if (n.$type === 'bpmn:ExclusiveGateway') { // 排它网关
n.outgoing?.forEach(nn => {
let targetTask = activityList.find(m => m.key === nn.targetRef.id)
if (targetTask) {
canvas.addMarker(nn.id, targetTask.endTime ? 'highlight' : 'highlight-todo');
}
})
} else if (n.$type === 'bpmn:ParallelGateway') { // 并行网关
if (activity) {
canvas.addMarker(n.id, activity.endTime ? 'highlight' : 'highlight-todo')
n.outgoing?.forEach(nn => {
const targetTask = activityList.find(m => m.key === nn.targetRef.id)
if (targetTask) {
canvas.addMarker(nn.id, targetTask.endTime ? 'highlight' : 'highlight-todo')
canvas.addMarker(nn.targetRef.id, targetTask.endTime ? 'highlight' : 'highlight-todo')
}
})
}
} else if (n.$type === 'bpmn:StartEvent') { // 开始节点
n.outgoing?.forEach(nn => { // outgoing 例如说【bpmn:SequenceFlow】连线
let fromTask = activityList.find(m => m.key === nn.targetRef.id)
if (fromTask) {
canvas.addMarker(nn.id, 'highlight');
canvas.addMarker(n.id, 'highlight');
}
});
} else if (n.$type === 'bpmn:EndEvent') { // 结束节点
if (endActivity.key !== n.id) { // 保证 endActivity 就是 EndEvent
return;
}
// 在并行网关后，跟着多个任务，如果其中一个任务完成，endActivity 的 endTime 就会存在值
// 所以，通过 todoActivity 在做一次判断
if (endActivity.endTime && !todoActivity) {
canvas.addMarker(n.id, 'highlight');
}
}
})
},
initModelListeners() {
const EventBus = this.bpmnModeler.get("eventBus");
const that = this;
// 注册需要的监听事件, 将. 替换为 - , 避免解析异常
EventBus.on('element.hover', function(eventObj) {
let element = eventObj ? eventObj.element : null;
that.elementHover(element);
});
EventBus.on('element.out', function(eventObj) {
let element = eventObj ? eventObj.element : null;
that.elementOut(element);
});
},
// 流程图的元素被 hover
elementHover(element) {
this.element = element;
!this.elementOverlayIds && (this.elementOverlayIds = {});
!this.overlays && (this.overlays = this.bpmnModeler.get("overlays"));
// 展示信息
if (!this.elementOverlayIds[element.id] && element.type !== "bpmn:Process") {
this.elementOverlayIds[element.id] = this.overlays.add(element, {
position: { left: 0, bottom: 0 },
html: `<div class="element-overlays">
<p>Elemet id: ${element.id}</p>
<p>Elemet type: ${element.type}</p>
</div>`
});
}
},
// 流程图的元素被 out
elementOut(element) {
this.overlays.remove({ element });
this.elementOverlayIds[element.id] = null;
},
}
};
</script>
<style>
/** 通过 */
.highlight.djs-shape .djs-visual > :nth-child(1) {
fill: green !important;
stroke: green !important;
fill-opacity: 0.2 !important;
}
.highlight.djs-shape .djs-visual > :nth-child(2) {
fill: green !important;
}
.highlight.djs-shape .djs-visual > path {
fill: green !important;
fill-opacity: 0.2 !important;
stroke: green !important;
}
.highlight.djs-connection > .djs-visual > path {
stroke: green !important;
}
.highlight:not(.djs-connection) .djs-visual > :nth-child(1) {
fill: green !important; /* color elements as green */
}
/deep/.highlight.djs-shape .djs-visual > :nth-child(1) {
fill: green !important;
stroke: green !important;
fill-opacity: 0.2 !important;
}
/deep/.highlight.djs-shape .djs-visual > :nth-child(2) {
fill: green !important;
}
/deep/.highlight.djs-shape .djs-visual > path {
fill: green !important;
fill-opacity: 0.2 !important;
stroke: green !important;
}
/deep/.highlight.djs-connection > .djs-visual > path {
stroke: green !important;
}
/** 处理中 */
.highlight-todo.djs-connection > .djs-visual > path {
stroke: orange !important;
stroke-dasharray: 4px !important;
fill-opacity: 0.2 !important;
}
.highlight-todo.djs-shape .djs-visual > :nth-child(1) {
fill: orange !important;
stroke: orange !important;
stroke-dasharray: 4px !important;
fill-opacity: 0.2 !important;
}
/deep/.highlight-todo.djs-connection > .djs-visual > path {
stroke: orange !important;
stroke-dasharray: 4px !important;
fill-opacity: 0.2 !important;
marker-end: url(#sequenceflow-end-_E7DFDF-_E7DFDF-803g1kf6zwzmcig1y2ulm5egr);
}
/deep/.highlight-todo.djs-shape .djs-visual > :nth-child(1) {
fill: orange !important;
stroke: orange !important;
stroke-dasharray: 4px !important;
fill-opacity: 0.2 !important;
}
/** 不通过 */
.highlight-reject.djs-shape .djs-visual > :nth-child(1) {
fill: red !important;
stroke: red !important;
fill-opacity: 0.2 !important;
}
.highlight-reject.djs-shape .djs-visual > :nth-child(2) {
fill: red !important;
}
.highlight-reject.djs-shape .djs-visual > path {
fill: red !important;
fill-opacity: 0.2 !important;
stroke: red !important;
}
.highlight-reject.djs-connection > .djs-visual > path {
stroke: red !important;
}
.highlight-reject:not(.djs-connection) .djs-visual > :nth-child(1) {
fill: red !important; /* color elements as green */
}
/deep/.highlight-reject.djs-shape .djs-visual > :nth-child(1) {
fill: red !important;
stroke: red !important;
fill-opacity: 0.2 !important;
}
/deep/.highlight-reject.djs-shape .djs-visual > :nth-child(2) {
fill: red !important;
}
/deep/.highlight-reject.djs-shape .djs-visual > path {
fill: red !important;
fill-opacity: 0.2 !important;
stroke: red !important;
}
/deep/.highlight-reject.djs-connection > .djs-visual > path {
stroke: red !important;
}
/** 已取消 */
.highlight-cancel.djs-shape .djs-visual > :nth-child(1) {
fill: grey !important;
stroke: grey !important;
fill-opacity: 0.2 !important;
}
.highlight-cancel.djs-shape .djs-visual > :nth-child(2) {
fill: grey !important;
}
.highlight-cancel.djs-shape .djs-visual > path {
fill: grey !important;
fill-opacity: 0.2 !important;
stroke: grey !important;
}
.highlight-cancel.djs-connection > .djs-visual > path {
stroke: grey !important;
}
.highlight-cancel:not(.djs-connection) .djs-visual > :nth-child(1) {
fill: grey !important; /* color elements as green */
}
/deep/.highlight-cancel.djs-shape .djs-visual > :nth-child(1) {
fill: grey !important;
stroke: grey !important;
fill-opacity: 0.2 !important;
}
/deep/.highlight-cancel.djs-shape .djs-visual > :nth-child(2) {
fill: grey !important;
}
/deep/.highlight-cancel.djs-shape .djs-visual > path {
fill: grey !important;
fill-opacity: 0.2 !important;
stroke: grey !important;
}
/deep/.highlight-cancel.djs-connection > .djs-visual > path {
stroke: grey !important;
}
</style>