ng-multiselect-dropdown总是被触发

Question

我正在使用ng-multiselect-dropdown。我对其中一个回调有疑问

     <ng-multiselect-dropdown *ngIf="filteredSids.length > 0"
                                         [data]="filteredSids"
                                         [disabled]="false"
                                         [(ngModel)]="selectedSids"
                                         (onSelect)="selectedSIDs($event); onItemSelect($event)"
                                         (onSelectAll)="onSelectAll($event)"
                                         (onDeSelect)="onItemDeSelect($event)"
                                         (onDeSelectAll)="onDeSelectAll($event)"
                                         [settings]="dropdownSettings"
                                         (onDropDownClose)="onCloseDialog($event)">
                </ng-multiselect-dropdown>

onDropDownClose回调不仅在取消下拉菜单时触发，而且在我单击页面中的任意位置时触发。即使下拉菜单处于关闭状态，它也会被触发。我确实需要仅在下拉菜单关闭时才触发此操作。任何帮助表示赞赏。