Add InfoWindow to current click position

[HaukeGulich]

I want to open a InfoWindow when clicking on a polyline:

` map.addUIEventHandler(polygon, UIEventType.click, (JSObject obj) -> {

        System.out.println("Polygon click");
        InfoWindowOptions infoWindowOptions = new InfoWindowOptions();
        infoWindowOptions.position(new LatLong( 31.33255233509554    , 121.6711721454525 ));
        infoWindowOptions.content("<h2>Fred Wilkie</h2>"
                + "Current Location: Safeway<br>"
                + "ETA: 45 minutes" );

        InfoWindow fredWilkeInfoWindow = new InfoWindow(infoWindowOptions);
        fredWilkeInfoWindow.open(map);
    });

`

But how can I set the position to the position the mouse was clicked? In my case I have a shipping route and as soon as someone clicks on the route I want a popup at that position on the map.

Thanks for your help