Adds example code from bpmn-js-example-angular

This commit is contained in:
Aaron Louie 2020-01-07 09:48:27 -05:00
parent fb58d0e540
commit 94dcd9788e
8 changed files with 204 additions and 537 deletions

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@ -1,538 +1,49 @@
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<h1>Add bpmn-js to Angular</h1>
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</p>

View File

@ -0,0 +1,14 @@
.diagram-parent {
height: 400px;
border: solid 3px #EEE;
position: relative;
}
.import-error {
color: red;
padding: 20px;
position: absolute;
top: 0;
left: 0;
}

View File

@ -6,5 +6,27 @@ import { Component } from '@angular/core';
styleUrls: ['./app.component.scss']
})
export class AppComponent {
title = 'cr-connect-bpmn';
title = 'bpmn-js-angular';
diagramUrl = 'https://cdn.staticaly.com/gh/bpmn-io/bpmn-js-examples/dfceecba/starter/diagram.bpmn';
importError?: Error;
handleImported(event) {
const {
type,
error,
warnings
} = event;
if (type === 'success') {
console.log(`Rendered diagram (%s warnings)`, warnings.length);
}
if (type === 'error') {
console.error('Failed to render diagram', error);
}
this.importError = error;
}
}

View File

@ -1,3 +1,4 @@
import {HttpClientModule} from '@angular/common/http';
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
@ -12,7 +13,8 @@ import { DiagramComponent } from './diagram/diagram.component';
],
imports: [
BrowserModule,
AppRoutingModule
AppRoutingModule,
HttpClientModule
],
providers: [],
bootstrap: [AppComponent]

View File

@ -1 +1 @@
<p>diagram works!</p>
<div #ref class="diagram-container"></div>

View File

@ -0,0 +1,4 @@
.diagram-container {
height: 100%;
width: 100%;
}

View File

@ -1,15 +1,93 @@
import { Component, OnInit } from '@angular/core';
import {HttpClient} from '@angular/common/http';
import {
AfterContentInit,
Component,
ElementRef,
EventEmitter,
Input,
OnChanges,
OnDestroy,
Output,
SimpleChanges,
ViewChild
} from '@angular/core';
/**
* You may include a different variant of BpmnJS:
*
* bpmn-viewer - displays BPMN diagrams without the ability
* to navigate them
* bpmn-modeler - bootstraps a full-fledged BPMN editor
*/
import * as BpmnJS from 'bpmn-js/dist/bpmn-modeler.production.min.js';
import {throwError} from 'rxjs';
import {catchError} from 'rxjs/operators';
import {importDiagram} from './rx';
@Component({
selector: 'app-diagram',
templateUrl: './diagram.component.html',
styleUrls: ['./diagram.component.scss']
})
export class DiagramComponent implements OnInit {
export class DiagramComponent implements AfterContentInit, OnChanges, OnDestroy {
private bpmnJS: BpmnJS;
constructor() { }
@ViewChild('ref', {static: true}) private el: ElementRef;
@Output() private importDone: EventEmitter<any> = new EventEmitter();
ngOnInit() {
@Input() private url: string;
constructor(private http: HttpClient) {
this.bpmnJS = new BpmnJS();
this.bpmnJS.on('import.done', ({error}) => {
if (!error) {
this.bpmnJS.get('canvas').zoom('fit-viewport');
}
});
}
ngAfterContentInit(): void {
this.bpmnJS.attachTo(this.el.nativeElement);
}
ngOnChanges(changes: SimpleChanges) {
// re-import whenever the url changes
if (changes.url) {
this.loadUrl(changes.url.currentValue);
}
}
ngOnDestroy(): void {
this.bpmnJS.destroy();
}
/**
* Load diagram from URL and emit completion event
*/
loadUrl(url: string) {
return (
this.http.get(url, {responseType: 'text'}).pipe(
catchError(err => throwError(err)),
importDiagram(this.bpmnJS)
).subscribe(
(warnings) => {
this.importDone.emit({
type: 'success',
warnings
});
},
(err) => {
this.importDone.emit({
type: 'error',
error: err
});
}
)
);
}
}

36
src/app/diagram/rx.ts Normal file
View File

@ -0,0 +1,36 @@
import {Observable} from 'rxjs';
/**
* An operator that imports the first XML piped via the piped diagram XML
* into the passed BpmnJS instance.
*/
export const importDiagram = (bpmnJS) => <Object>(source: Observable<string>) =>
new Observable<string>(observer => {
const subscription = source.subscribe({
next(xml: string) {
// canceling the subscription as we are interested
// in the first diagram to display only
subscription.unsubscribe();
bpmnJS.importXML(xml, (err, warnings) => {
if (err) {
observer.error(err);
} else {
observer.next(warnings);
}
observer.complete();
});
},
error(e) {
console.log('ERROR');
observer.error(e);
},
complete() {
observer.complete();
}
});
});