Class CdkMenuTrigger

src/cdk/menu/menu-trigger.ts:80–385

  ],
})
export class CdkMenuTrigger extends CdkMenuTriggerBase implements OnChanges, OnDestroy {
  private readonly _elementRef: ElementRef<HTMLElement> = inject(ElementRef);
  private readonly _ngZone = inject(NgZone);
  private readonly _changeDetectorRef = inject(ChangeDetectorRef);
  private readonly _inputModalityDetector = inject(InputModalityDetector);
  private readonly _directionality = inject(Directionality, {optional: true});
  private readonly _renderer = inject(Renderer2);
  private readonly _injector = inject(Injector);
  private _cleanupMouseenter!: () => void;

  /** The app's menu tracking registry */
  private readonly _menuTracker = inject(MenuTracker);

  /** The parent menu this trigger belongs to. */
  private readonly _parentMenu = inject(CDK_MENU, {optional: true});

  /** The menu aim service used by this menu. */
  private readonly _menuAim = inject(MENU_AIM, {optional: true});

  constructor() {
    super();
    this._setRole();
    this._registerCloseHandler();
    this._subscribeToMenuStackClosed();
    this._subscribeToMouseEnter();
    this._subscribeToMenuStackHasFocus();
    this._setType();
  }

  /** Toggle the attached menu. */
  toggle() {
    this.isOpen() ? this.close() : this.open();
  }

  /** Open the attached menu. */
  open() {
    if (!this._parentMenu) {
      this._menuTracker.update(this);
    }
    if (!this.isOpen() && this.menuTemplateRef != null) {
      this.opened.next();

      this.overlayRef =
        this.overlayRef || createOverlayRef(this._injector, this._getOverlayConfig());
      this.overlayRef.attach(this.getMenuContentPortal());
      this._changeDetectorRef.markForCheck();
      this._subscribeToOutsideClicks();
    }
  }

  /** Close the opened menu. */
  close() {
    if (this.isOpen()) {
      this.closed.next();

      this.overlayRef!.detach();
      this._changeDetectorRef.markForCheck();
    }