Class CdkHeaderRowDef

src/cdk/table/row.ts:90–125

  inputs: [{name: 'columns', alias: 'cdkHeaderRowDef'}],
})
export class CdkHeaderRowDef extends BaseRowDef implements CanStick, OnChanges {
  _table? = inject(CDK_TABLE, {optional: true});

  private _hasStickyChanged = false;

  /** Whether the row is sticky. */
  @Input({alias: 'cdkHeaderRowDefSticky', transform: booleanAttribute})
  get sticky(): boolean {
    return this._sticky;
  }
  set sticky(value: boolean) {
    if (value !== this._sticky) {
      this._sticky = value;
      this._hasStickyChanged = true;
    }
  }
  private _sticky = false;

  // Prerender fails to recognize that ngOnChanges in a part of this class through inheritance.
  // Explicitly define it so that the method is called as part of the Angular lifecycle.
  override ngOnChanges(changes: SimpleChanges<this>): void {
    super.ngOnChanges(changes);
  }

  /** Whether the sticky state has changed. */
  hasStickyChanged(): boolean {
    const hasStickyChanged = this._hasStickyChanged;
    this.resetStickyChanged();
    return hasStickyChanged;
  }

  /** Resets the sticky changed state. */
  resetStickyChanged(): void {
    this._hasStickyChanged = false;
  }
}

/**
 * Footer row definition for the CDK table.