Callback events to trigger either window closed or print completes

[akshaybhagwat76]

Html->

<button class="btn btn-primary" tooltip="Print" style="margin-left: 12px;" [useExistingCss]="true"
[styleSheetFile]="stylesURL" printSectionId="sectiontoprint" ngxPrint>print
Print Order

I were using this above snippet for html print with this feature ngx-print, but i want to request and to know how to make sense(trigger) either print is complete or cancel pressed. Could you please add this ability.
Thanks!