set trigger in Angular component in for loop

I do have an Angular component in a for loop like this:

<div *ngFor="let schedule of schedules">
   <my-app-component [schedule]="schedule"></my-app-component>
</div>

The MyAppComponent looks like this:

@Component({
  selector: 'my-app-component',
  templateUrl: '...',
  styleUrls: ['...'],
  encapsulation: ViewEncapsulation.None
})
export class MyAppComponent implements OnInit {

  public disableButtonTrigger: boolean;

 ngOnInit() {
     this.disableButtonTrigger = false;
 }

 someFunction() {
     ...
     this.disableButtonTrigger = true; // this should set disableButtonTrigger to true only for this component and not for all components in the loop
     ...
  }

In the MyAppComponent is a boolean trigger to disable buttons in this component. My problem now is if I set disableButtonTrigger = true than all buttons in all components in the for- loop are disabled. May aim would be that only the buttons on the specific component should be diasbled and not in all component. How can I achive this?