[Gwt-openlayers-users] osm + gmaps (either) + wms (geoserver)

[Armando F. <arm...@gm...>]

Hi,
I thought this was a simple enough exercise... I did refrain myself from
asking for help here... but after two days of messing around with all the
combinations I could try and getting a massive headhache, here I am.
I am trying do display a GeoServer WMS layer on top of OSM and gMap base
layers. I would be more than happy with a single base layer though!
I understand that both OSM and gMap are in EPSG:900913 and, unless I host my
own OSM, I'm stuck with this projection. But that's fine, I'll reproject my
own WMSs (originally in EPSG:27700, British Coord Sys). Only it does not
work. All sorts of things happen: the WMS display correctly on top of OSM
only to disappear when I zoom further in (and this is the closest I got to a
working app!). Is there a working example somewhere? Again, all I'm trying
to achieve is displaying my own WMSs (and perhaps WMSs too) on top of a base
layer (osm, gmap, bing, anything). Below is what I've done. Thank you.

MapOptions defaultMapOptions = new MapOptions();
defaultMapOptions.setAllOverlays(true);
MapWidget mapWidget = new MapWidget("400px", "300px", defaultMapOptions);

WMSParams wmsParams = new WMSParams();
wmsParams.setFormat("image/png");
wmsParams.setLayers("my_wms");  // this is forced declared in GeoServer from
its native 27700 to 900913, but I tried a native 900913 too with no luck
wmsParams.setStyles("");
wmsParams.setIsTransparent(true);

WMS wmsLayer = new WMS("WMS Layer", "http://myip:8080/geoserver/wms",
wmsParams);
wmsLayer.setIsBaseLayer(false);

GoogleOptions googleLayeroptions= new  GoogleOptions();
googleLayeroptions.setSphericalMercator(true);
GMapType gmapType = GMapType.G_NORMAL_MAP;
googleLayeroptions.setType(gmapType);
Google googleLayer = new Google("Goole Layer",googleLayeroptions);

OSM osm = OSM.Osmarender("Osmarender"); // as I said, I could do with a
single base layer.

Map map = mapWidget.getMap();

map.addLaye(wmsLayer);
map.addLayer(osm);
map.addLayer(googleLayer);

map.addControl(new LayerSwitcher());
map.addControl(new MousePosition());