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"
}
},
data() {
return {};
},
mounted() {
this.initBpmnModeler();
this.createNewDiagram(this.value);
this.$once("hook:beforeDestroy", () => {
if (this.bpmnModeler) this.bpmnModeler.destroy();
this.$emit("destroy", this.bpmnModeler);
this.bpmnModeler = null;
});
},
watch: {
value: function (newValue) { // 在 xmlString 发生变化时，重新创建，从而绘制流程图
this.createNewDiagram(newValue);
}
},
methods: {
initBpmnModeler() {
if (this.bpmnModeler) return;
this.bpmnModeler = new BpmnViewer({
container: this.$refs["bpmn-canvas"]
})
},
/* 创建新的流程图 */
async createNewDiagram(xml) {
// 将字符串转换成图显示出来
let newId = `Process_${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));
}
} catch (e) {
console.error(`[Process Designer Warn]: ${e?.message || e}`);
}
}
}
};
</script>