trigger MouseDown in x-map-polygon  #119

can you please tell me how I can trigger the MouseDown (mousedown) event from the x-map-polygon component
I tried to do that in the following way, but it did not work.

` <x-map #xmap
[Options]="_options"
[Box]="_box"
(MouseDown)="_eventMouseDown($event)"

    <x-map-polygon  *ngIf="showCircle()"
    (MouseDown)="_eventMouseDown($event)" 

    [Paths]="_path" 
    [Editable]="true" 

    ></x-map-polygon>
  </x-map> ` ***Component.html

_eventMouseDown(event){ console.log('_eventMouseDown(event)'); } ***Component.html