public TouchPopUpEventFilter(IEventSource <TouchEventData> source, IPopupLocationSource locationSource) : base(locationSource)
 {
     this.source = source;
 }
 protected PopUpEventFilter(IPopupLocationSource locationSource)
 {
     this.locationSource = locationSource;
 }
 public MousePopUpEventFilter(IEventSource <MouseEventData> source, IPopupLocationSource locationSource) : base(locationSource)
 {
     this.source = source;
 }
 public PopupClosingEventProcessor(IPopupLocationSource root)
 {
     this.root = root;
 }