How to find click events on jquery flowchart?

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jQuery

CSS3

HTML5

jQuery-UI

There is an example of how to use JQuery flowchart in Angular programs here :https://github.com/nephilimboy/Angular_FlowChartJS. What I am trying to do is adding click events to the selected operator in the chart.

These are related codes of the flowchart:

HTML:

<div id="chart_container" #chart_container>
        <!-- <pan-zoom [config]="panzoomConfig"> -->
        <div class="flowchart-example-container" id="exampleDiv" #exampleDiv></div>
        <!-- </pan-zoom> -->
      </div>
    
    
    
    <input type="button" value="add operator" (click)="addNewOperator()">
    <input type="button" value="add operator2" (click)="addNewOperator2()">
    <input type="button" value="delete" (click)="deleteOperationOrLink()">
    <input type="button" value="load" (click)="load()">
    <input type="button" value="get" (click)="get()">
    <br />
    <textarea nbInput fullWidth shape="round" name="diagModel" [(ngModel)]="diagModel" placeholder="model"
      style="height: 300px; width: 500px"></textarea>

CSS:

body {
        font-family: 'Helvetica Neue', Helvetica, Arial, serif;
        font-size: 15px;
        font-weight: 400;
        line-height: 1.5;
        color: #666;
      }
      
      #chart_container {
        width: 100%;
        height: 500px;
        overflow: hidden;
        background: repeating-linear-gradient(
          45deg,
          #eee,
          #eee 10px,
          #e5e5e5 10px,
          #e5e5e5 20px
        );
        border: 1px solid black;
      }
    
      #exampleDiv {
        width: 2000px;
        height: 2000px;
        background: white;
      }
      
      .flowchart-example-container {
        height: 200px;
        border: 1px solid #BBB;
        margin-bottom: 10px;
      }
      
      /* #exampleDiv {
        width: 100%;
        height: 2000px;
        background: white;
      } */
      
      .draggable_operators_label {
        margin-bottom: 5px;
      }
      
      .draggable_operators_divs {
        margin-bottom: 20px;
      }
      
      .draggable_operator {
        display: inline-block;
        padding: 2px 5px 2px 5px;
        border: 1px solid #ccc;
        cursor: grab;
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        -khtml-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
      }
    
    
    
    
    .flowchart-container {
        position: relative;
        overflow: hidden;
    }
    
    .flowchart-links-layer, .flowchart-operators-layer, .flowchart-temporary-link-layer {
        position: absolute;
        top: 0px;
        left: 0px;
        width: 100%;
        height: 100%;
    }
    
    .flowchart-operators-layer, .flowchart-temporary-link-layer {
        pointer-events: none;
    }
    
    .flowchart-temporary-link-layer {
        display: none;
    }
    
    
    
    .flowchart-link, .flowchart-operator {
        cursor: default;
    }
    
    
    .flowchart-operator-connector {
        position: relative;
        padding-top: 5px;
        padding-bottom: 5px;
    }
    
    .flowchart-operator-connector-label {
        font-size: small;
    }
    
    .flowchart-operator-inputs .flowchart-operator-connector-label {
        margin-left: 14px;
    }
    
    .flowchart-operator-outputs .flowchart-operator-connector-label {
        text-align: right;
        margin-right: 5px;
    }
    
    .flowchart-operator-connector-arrow {
        width: 0px;
        height: 0px;
        border-top: 10px solid transparent;
        border-bottom: 10px solid transparent;
        border-left: 10px solid rgb(204, 204, 204);
        position: absolute;
        top: 0px;
    }
    
    .flowchart-operator-connector-small-arrow {
        width: 0px;
        height: 0px;
        border-top: 5px solid transparent;
        border-bottom: 5px solid transparent;
        border-left: 5px solid transparent; /*rgb(100, 100, 100);*/
        position: absolute;
        top: 5px;
        pointer-events: none;
    }
    
    .flowchart-operator-connector:hover .flowchart-operator-connector-arrow {
        border-left: 10px solid rgb(105, 255, 5);
    }
    
    .flowchart-operator-inputs .flowchart-operator-connector-arrow {
        left: -1px;
    }
    
    .flowchart-operator-outputs .flowchart-operator-connector-arrow {
        right: -10px;
    }
    
    .flowchart-operator-inputs .flowchart-operator-connector-small-arrow {
        left: -1px;
    }
    
    .flowchart-operator-outputs .flowchart-operator-connector-small-arrow {
        right: -7px;
    }
    
    .unselectable {
       -moz-user-select: none;
       -khtml-user-select: none;
       -webkit-user-select: none;
    
       /*
         Introduced in IE 10.
         See http://ie.microsoft.com/testdrive/HTML5/msUserSelect/
       */
       -ms-user-select: none;
       user-select: none;
    }
    
    
    /* Default Operator */
    
    .flowchart-operator {
        position: absolute;
        width: 140px;
        border: 1px solid #CCCCCC;
        background: #FAFAFA;
        pointer-events: initial;
    }
    
    .flowchart-operator:hover {
        border-color: rgb(255, 238, 0) !important;
    }
    
    .flowchart-operator.selected {
        /* border-color: #555; */
        border: 5px solid black;
    }
    
    
    
    .flowchart-operator .flowchart-operator-title {
        width: 100%;
        padding: 5px;
        font-weight: bold;
        box-sizing: border-box;
        border-bottom: 1px solid #DDDDDD;
        /* background: #F0F0F0; */
        height: auto;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        cursor: move;
        
    
        /* background-color: #2aa58f;
        color: white; */
    }
    
    .flowchart-operator .flowchart-operator-inputs-outputs {
        display: table;
        width: 100%;
        margin-top: 5px;
        margin-bottom: 5px;
    }
    
    .flowchart-operator .flowchart-operator-inputs, .flowchart-default-operator .flowchart-operator-outputs {
        display: table-cell;
        width: 50%;
    }
    
    
    /* .flowchart-link > path{
        stroke: #2aa58f;
    } */
    
    
    
    
    .myTest{
        background-color: #2a7ea5;
        color: white;
    }
    
    .myTest2{
        background-color: #4c0f8d;;
        color: white;
    }

TS:

<pre lang="Javascript"><pre lang="Javascript">import { Component, ViewChild, ElementRef, OnInit, AfterViewInit, AfterContentInit, AfterViewChecked, AfterContentChecked } from '@angular/core';
    import {
      Compiler,
      ComponentFactory,
      ComponentFactoryResolver,
      ComponentRef,
      Input,
      ModuleWithComponentFactories,
      NgModule,
      ViewContainerRef
    } from '@angular/core';
    declare var $: any;
    
    @Component({
      selector: 'app-root',
      templateUrl: "./app.component.html",
    })
    export class AppComponent implements AfterViewInit {
    
      public diagModel: any;
    
      private cx: number;
      private cy: number;
    
    
    
      @ViewChild('exampleDiv') exampleDiv: ElementRef;
    
    
    
    
      constructor() {
      }
    
    
    
      ngAfterViewInit() {
    
    
        var container = $('#chart_container');
        this.cx = $('#exampleDiv').width() / 2;
        this.cy = $('#exampleDiv').height() / 2;
        $('#exampleDiv').panzoom({
        });
        $('#exampleDiv').panzoom('pan', -this.cx + container.width() / 2, -this.cy + container.height() / 2);
    
        var possibleZooms = [0.5, 0.75, 1, 2, 3];
        var currentZoom = 2;
        container.on('mousewheel.focal', function (e) {
          e.preventDefault();
          var delta = (e.delta || e.originalEvent.wheelDelta) || e.originalEvent.detail;
          var zoomOut: any = delta ? delta < 0 : e.originalEvent.deltaY > 0;
          currentZoom = Math.max(0, Math.min(possibleZooms.length - 1, (currentZoom + (zoomOut * 2 - 1))));
          $('#exampleDiv').flowchart('setPositionRatio', possibleZooms[currentZoom]);
          $('#exampleDiv').panzoom('zoom', possibleZooms[currentZoom], {
            animate: false,
            focal: e
          });
    
        });
    
    
        setTimeout(() => {
          $(this.exampleDiv.nativeElement).flowchart({
            data: '',
            multipleLinksOnOutput: true,
          });
    
        }, 1000);
    
      }
    
    
      getOperatorData($element) {
        var nbInputs = parseInt($element.data('nb-inputs'));
        var nbOutputs = parseInt($element.data('nb-outputs'));
        var data = {
          properties: {
            title: $element.text(),
            inputs: {},
            outputs: {}
          }
        };
    
        var i = 0;
        for (i = 0; i < nbInputs; i++) {
          data.properties.inputs['input_' + i] = {
            label: 'Input ' + (i + 1)
          };
        }
        for (i = 0; i < nbOutputs; i++) {
          data.properties.outputs['output_' + i] = {
            label: 'Output ' + (i + 1)
          };
        }
    
        return data;
      }
    
    
    
      operatorI = 0;
      operatorII = 0;
      addNewOperator() {
    
        var operatorId = 'created_operator_' + this.operatorI;
        var operatorData = {
          top: this.cx,
          left: this.cy,
          properties: {
            title: 'Operator ' + (this.operatorI + 3),
            class: 'myTest',
            inputs: {},
            outputs: {
              output_1: {
                label: 'Output 1',
              },
              output_2: {
                label: 'Output 2',
              },
              output_3: {
                label: 'Output 3',
              },
              output_4: {
                label: 'Output 4',
              },
            }
          }
        }
    
        this.operatorI++;
        $(this.exampleDiv.nativeElement).flowchart('createOperator', operatorId, operatorData);
      }
    
      addNewOperator2() {
    
        var operatorId = 'created_operator_' + this.operatorI;
        var operatorData = {
          top: this.cx,
          left: this.cy,
          properties: {
            title: 'Operator ' + (this.operatorI + 3),
            class: 'myTest2',
            inputs: {
              input_1: {
                label: 'Input 1',
              },
              input_2: {
                label: 'Input 2',
              },
              input_3: {
                label: 'Input 3',
              },
            },
            outputs: {}
          }
        }
    
        this.operatorI++;
        $(this.exampleDiv.nativeElement).flowchart('createOperator', operatorId, operatorData);
      }
    
    
    
      deleteOperationOrLink() {
        $(this.exampleDiv.nativeElement).flowchart('deleteSelected');
      }
    
      load() {
        $(this.exampleDiv.nativeElement).flowchart('deleteSelected');
        var data = JSON.parse(this.diagModel);
        $(this.exampleDiv.nativeElement).flowchart('setData', data);
      }
    
    
      get() {
        $(this.exampleDiv.nativeElement).flowchart('deleteSelected');
        var data = $(this.exampleDiv.nativeElement).flowchart('getData');
        this.diagModel = JSON.stringify(data, null, 2);
      }
    
    }

What I have tried:

When I select operators on the screen, the border color will change and also when hovering it the border becomes yellow. But I don't know how to add click events to them to open a form when I click(select) them?