Question

First, yes I have searched already and found this answer already:

GWT JSNI – problem passing Strings

I’m trying to call a java method from a JSNI method, but not getting anywhere. I’ve tried the advice given above, but it still won’t work.

Here’s the code:

public native void initCustomListeners(MapmakerMapViewPresenter.MyView view) /*-{
//public native void initCustomListeners() /*-{

    $wnd.getLocationDescriptions = function(lng, lat) {
        $entry([e-mail]::getLocationDescriptions(DD)(lng, lat));
    }

    $wnd.google.maps.event.addListener(map, 'click', function(event) {
        var lat = event.latLng.lat().toFixed(3);
        var lng = event.latLng.lng().toFixed(3);
        alert("(" + lat + ", " + lng + ")");
        $wnd.getLocationDescriptions(lng, lat);

        alert("Test!");
    });
}-*/;    @Override
public void getLocationDescriptions(double lng, double lat) {
    getUiHandlers().doGetLocationDescriptions(lng, lat);
}

Can anyone help me out?

Jason

Answer 1

I don’t know if that’s the issue (you don’t even say how that code behaves vs. how you expect it to behave) but there are a few bugs in your code:

• $entry wraps a function, so you have to call the function it returns, rather than (uselessly) wrap the result of the function after calling it!
  I.e. $entry(function(lat,lng) { [e-mail]::quux(DD)(a, b); } rather than $entry([e-mail]::quux(DD)(a, b))

• you addListener on a map but that variable is never defined.