It should be possible to define context from within a component. This way you can use this in the action method:

context = [
    {
      text: 'Select element',
      context: ['select-element'],
      action: (args: any) => {
        this.selected = args.element;
      }
    }
  ];

Right now Contexr adds context every time such a component is created.

Example code

import { Component } from '@angular/core';
import {ContexrService} from '../../../../projects/contexr/src/lib/providers/contexr.service';

@Component({
  selector: 'app-example-page',
  templateUrl: './example-page.component.html',
  styleUrls: ['./example-page.component.css']
})
export class ExamplePageComponent {

  dataSource = [
    {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
    {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
    {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
    {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
    {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
    {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
    {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
    {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
    {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
    {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
  ];

  displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];

  selected;

  context = [
    {
      text: 'Select element',
      context: ['select-element'],
      action: (args: any) => {
        this.selected = args.element;
      }
    }
  ];

  constructor(private contexr: ContexrService) {
    this.contexr.registerContextMenuItems(this.context);
  }
}

<table mat-table [dataSource]="dataSource" class="mat-elevation-z8">
  <!-- Position Column -->
  <ng-container matColumnDef="position">
    <th mat-header-cell *matHeaderCellDef> No. </th>
    <td mat-cell *matCellDef="let element"> {{element.position}} </td>
  </ng-container>

  <!-- Name Column -->
  <ng-container matColumnDef="name">
    <th mat-header-cell *matHeaderCellDef> Name </th>
    <td mat-cell *matCellDef="let element"> {{element.name}} </td>
  </ng-container>

  <!-- Weight Column -->
  <ng-container matColumnDef="weight">
    <th mat-header-cell *matHeaderCellDef> Weight </th>
    <td mat-cell *matCellDef="let element"> {{element.weight}} </td>
  </ng-container>

  <!-- Symbol Column -->
  <ng-container matColumnDef="symbol">
    <th mat-header-cell *matHeaderCellDef> Symbol </th>
    <td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
  </ng-container>

  <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
  <tr mat-row
    *matRowDef="let row;
    columns: displayedColumns;"
    [ctx]="'select-element'"
    [ctxArgs]="{element: row}"
  ></tr>
</table>

<div class="element" *ngIf="selected">
  <h1>Selected element</h1>

  <mat-card>
    <mat-card-header>
      {{selected.name}}
    </mat-card-header>
    <mat-card-content>
      <ul>
        <li>Weight: <b>{{selected.weight}}</b></li>
        <li>Symbol: <b>{{selected.symbol}}</b></li>
      </ul>
    </mat-card-content>
  </mat-card>
</div>

kayvanbree / contexr

Define context in components #23

Example code