public AGSUIEvents(UIEventsAggregator aggregator)
{
_aggregator = aggregator;
MouseEnter = new AGSEvent <MousePositionEventArgs> ();
MouseLeave = new AGSEvent <MousePositionEventArgs> ();
MouseMove = new AGSEvent <MousePositionEventArgs> ();
MouseClicked = new AGSEvent <MouseClickEventArgs> ();
MouseDoubleClicked = new AGSEvent <MouseClickEventArgs>();
MouseDown = new AGSEvent <MouseButtonEventArgs> ();
MouseUp = new AGSEvent <MouseButtonEventArgs> ();
LostFocus = new AGSEvent <MouseButtonEventArgs>();
}