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Re: [Gwt-openlayers-users] MapClickListener support
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From: Jon B. <jon...@go...> - 2010-11-29 10:01:11
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Sorry if I wasn't clear in my previous email, but the server is actually
receiving and dealing with the request. I've tried another remote server
and I get the same problem. I've debugged the website with Chrome, and it
just hangs when making the request - it says "pending" under Status.
However, the Chrome debugging console shows the following errors:
XMLHttpRequest cannot load
http://localhost:8080/geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&LAYERS=topp%3Atasmania_state_boundaries&QUERY_LAYERS=topp%3Atasmania_state_boundaries&STYLES=&BBOX=140.328735%2C-44.906872%2C151.98523%2C-38.315075&FEATURE_COUNT=10&HEIGHT=600&WIDTH=1061&FORMAT=image%2Fpng&INFO_FORMAT=text%2Fhtml&SRS=EPSG%3A4326&X=592&Y=322.
Origin http://127.0.0.1:8888 <http://127.0.0.1/> is not allowed by
Access-Control-Allow-Origin.
1. Uncaught java.lang.IllegalArgumentException: Something other than a
Java object was returned from JSNI method
'@org.gwtopenmaps.openlayers.client.util.JSObjectHelper::getProperty(Lorg/gwtopenmaps/openlayers/client/util/JSObject;Ljava/lang/String;)':
JS value of type int, expected java.lang.Object
wms<http://localhost:8080/geoserver/wms?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetFeatureInfo&LAYERS=topp%3Atasmania_state_boundaries&QUERY_LAYERS=topp%3Atasmania_state_boundaries&STYLES=&BBOX=140.328735%2C-44.906872%2C151.98523%2C-38.315075&FEATURE_COUNT=10&HEIGHT=600&WIDTH=1061&FORMAT=image%2Fpng&INFO_FORMAT=text%2Fhtml&SRS=EPSG%3A4326&X=592&Y=322>Failed
to load resource
Following the link loads the correct result.
Jon
On 29 November 2010 08:42, Lukas Johansson <luk...@de...>wrote:
> Have you checked with firebug if any request are actually sent? Probably
> they aren’t as you get a JS error and you don’t see anything in the log at
> the server.
>
> By just “dry reading” your code I don’t see anything that pops out.
>
> You do get a “String cannot be cast to JSObject” exception and the only row
> I can guess cases this is:
>
> options.setLayers(getWMSMapLayers().toArray(new WMS[0]));
>
>
>
> What does getWMSMapLayers() return? Which toArray method is called?....
>
> /Lukas
>
>
>
>
>
> *Från:* man...@go... [mailto:
> man...@go...] *För *Jon Britton
>
> *Skickat:* den 26 november 2010 18:49
> *Till:* Lukas Johansson
> *Kopia:* gwt-openlayers-users
> *Ämne:* Re: [Gwt-openlayers-users] MapClickListener support
>
>
>
> Hi Lukas,
>
>
>
> I've added a WMSGetFeatureInfo control to my map, but when I make a request
> (by clicking on the map) the map freezes. I've checked by WMS server logs
> and it did receive a GetFeatureInfo request and seems to have returned a
> result.
>
>
>
> I was originally testing in Google Chrome, but I tried Firefox and get the
> same problem - however I also get a JavaScript exception:
>
>
>
> Uncaught JavaScript exception [uncaught exception:
> java.lang.ClassCastException: java.lang.String cannot be cast to
> org.gwtopenmaps.openlayers.client.util.JSObject] in , line 0
>
>
>
> Any idea what could be causing this? My code is shown below.
>
>
>
> Thanks,
>
>
>
> Jon
>
>
>
> public void resetWMSSelectControl() {
>
> if (wmsSelectControl != null)
>
>
> SmartWPS.getSmartWPS().getMap().removeControl(wmsSelectControl);
>
> WMSGetFeatureInfoOptions options = new
> WMSGetFeatureInfoOptions();
>
> options.setLayers(getWMSMapLayers().toArray(new
> WMS[0]));
>
> options.setDrillDown(true);
>
> options.setQueryVisible(true);
>
> options.setInfoFormat("application/vnd.ogc.gml");
>
>
>
> wmsSelectControl = new WMSGetFeatureInfo(options);
>
> wmsSelectControl.addGetFeatureListener(new
> GetFeatureInfoListener() {
>
>
>
> @Override
>
> public void onGetFeatureInfo(
>
>
> org.gwtopenmaps.openlayers.client.event.GetFeatureInfoListener.GetFeatureInfoEvent
> eventObject) {
>
> VectorFeature[]
> features = eventObject.getFeatures();
>
> System.out.println("FeatureInfo:
> " + eventObject.getText());
>
> }
>
> });
>
>
>
>
> SmartWPS.getSmartWPS().getMap().addControl(wmsSelectControl);
>
> wmsSelectControl.activate();
>
> }
>
>
>
> On 24 November 2010 16:01, Lukas Johansson <luk...@de...>
> wrote:
>
> I’ve commited a version that make the control a more complete and which
> uses the drilldown parameter introduced in OL 2.9[1] which can be used to
> access multiple servers.
>
> In october we realized that my patch hadn’t been commited so this was
> taken care of, however I do not think that its in the current stable build.
> Instead you need to checkout your own version.
>
>
>
> [1]
> http://dev.openlayers.org/releases/OpenLayers-2.9.1/doc/apidocs/files/OpenLayers/Control/WMSGetFeatureInfo-js.html#OpenLayers.Control.WMSGetFeatureInfo.drillDown
>
>
>
> You add the controller to the map, if you do not use drilldown only to top
> layer is queried. Most settings are set in WmsGetFeatureInfoOptions and not
> on the control itself.
>
>
>
> Usage is something along this path (copied from our working code, but you
> get the idea):
>
> WMSGetFeatureInfoOptions options = new WMSGetFeatureInfoOptions();
>
> options.setLayers(arrayOfLayersToQuery));
> //allows you to tell what layers that should
> be queried
>
> options.setDrillDown(true);
>
> options.setQueryVisible(true);
>
> options.setInfoFormat("application/vnd.ogc.gml");
> //return result as gml
>
>
>
>
>
>
>
> wmsSelectControl = new WMSGetFeatureInfo(options);
>
> wmsSelectControl.addGetFeatureListener(new GetFeatureInfoListener(){
>
>
> public void onGetFeatureInfo(GetFeatureInfoEvent eventObject) {
>
> VectorFeature[] features = eventObject.getFeatures();
>
>
> String html = "foo";
>
> FrameCloud popup = new FramedCloud("MapFeaturePopup",
> features[0].getCenterLonLat(), new Size(300, 400), html);
>
> }
>
> }
>
> map.addControl(wmsSelectControl);
>
>
>
> /Lukas
>
>
>
> *Från:* man...@go... [mailto:
> man...@go...] *För *Jon Britton
> *Skickat:* den 24 november 2010 16:42
> *Till:* Lukas Johansson
> *Kopia:* gwt-openlayers-users
> *Ämne:* Re: [Gwt-openlayers-users] MapClickListener support
>
>
>
> Hi Lukas,
>
>
>
> You haven't misunderstood, I wasn't aware there was a map control for this.
> My client application is for displaying many WMS layers, possibly from
> different servers. The user can add/remove WMS layers as they see fit by
> using their own WMS URLs. What I want to do is display the feature info for
> every layer currently visible on my map, but I'm struggling to figure out
> how WMSGetFeatureInfo can be used for this as each control corresponds to
> only one WMS URL. Would I need to make a new control for each map layer?
>
>
>
> Another problem is that the GWT-Openlayers WMGetFeatureInfo control seems
> to be incomplete as I can't access many of it's properties directly (such as
> url, title, layers...).
>
>
>
> Thanks,
>
>
>
> Jon
>
>
>
> On 24 November 2010 15:37, Lukas Johansson <luk...@de...>
> wrote:
>
> You want the x/y of the mouseclick in order to construct a
> WMSGetFeautureInfo? Why not use the existing WMSGetFeatureInfo control to
> begin with? This will handle the events, the request to the server and you
> can get it to produce a parsable result in GML from witch you can create
> features.
>
>
>
> Or have I misunderstood your usecase?
>
> /Lukas
>
>
>
>
>
> *Från:* Jon Britton [mailto:jon...@go...]
> *Skickat:* den 24 november 2010 15:20
> *Till:* gwt-openlayers-users
> *Ämne:* [Gwt-openlayers-users] MapClickListener support
>
>
>
> Hi
>
>
>
> I'm trying to register a MapClickListener so that I can generate a
> GetFeatureInfo request using the mouse x and y coordinates. Here is what
> I've got so far:
>
>
>
> mw.getMap().getListeners().add(new MapClickListener() {
>
> @Override
>
> public void onClick(MapClickEvent e) {
>
> SC.say("Map click at " + e.getLonLat());
>
> }
>
> });
>
>
>
> However, getListeners() isn't supported as far as I can tell (I get an
> UnsupportedOperationException on the first line above). Are there any plans
> to implement this soon? Alternatively, is there any other way to access the
> map coordinates of the mouse cursor?
>
>
>
> Thanks,
>
>
>
> Jon
>
>
>
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>
>
>
>
>
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>
>
>
>
> ------------------------------------------------------------------------------
> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500!
> Tap into the largest installed PC base & get more eyes on your game by
> optimizing for Intel(R) Graphics Technology. Get started today with the
> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs.
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>
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