Method _setSelection

src/cdk/collections/selection-model.ts:179–190

Sets the current selection from an array of items.

(values: T[])

  /** Sets the current selection from an array of items. */
  private _setSelection(values: T[]) {
    this._verifyValueAssignment(values);
    const oldValues = this.selected;
    const newSelectedSet = new Set(values.map(value => this._getConcreteValue(value)));
    values.forEach(value => this._markSelected(value));
    oldValues
      .filter(value => !newSelectedSet.has(this._getConcreteValue(value, newSelectedSet)))
      .forEach(value => this._unmarkSelected(value));
    const changed = this._hasQueuedChanges();
    this._emitChangeEvent();
    return changed;
  }

  /** Emits a change event and clears the records of selected and deselected values. */
  private _emitChangeEvent() {