[mapserver-users] WMSGetFeautureInfo

[Peter Huis in 't Veld]

Hi Steve,

The layer is already a global variable. But nevertherless I think I 
found the problem based on your remark. I have used the layer name
of mapserver and not the javascript variable layer reference!


Thanks!!!

Stephen Woodbridge schreef:
> Hi Peter,
>
> Since I just struggle my through this exact example, I think I might 
> be able to help :)
>
> Peter Huis in 't Veld wrote:
>> Hi,
>>
>> I'm trying to set up a WMS service with the possibility to obtain a 
>> popup containing the feature items.
>>
>> the components I''m using is:
>> - Openlayer
>> - Mapserver
>>
>> Testing it I can visualize all items but I get the following error 
>> message :
>>
>> Message: Object doesn't support this property or method
>> Line: 229
>> Char: 9
>> Code: 0
>> URI: http://myserver/lib/OpenLayers/Handler/Feature.js
>>
>> Looking at the code it looks like it has something to with the 
>> evalaution of the mouse click event
>>
>> I've three questions:
>> - Could someone explain a bit more about this error?
>> - Should I stick with WMS or should I use WFS?
>> - Does someone has some advice what might cause a problem based on 
>> the code snippet underneath?
>>
>> Thanks in advance for any support
>>
>> Peter
>>
>>
>> --------------------
>> Within in my webpage I've some javascript looking like:
>
> The problem is that you need to declare you layer as a global:
>
>
> var test;
>
>>   function init() {
>
>         test =  = new OpenLayers.Layer.WMS( ... );
>
>>   ....
>>         info = {
>>           click: new OpenLayers.Control.WMSGetFeatureInfo({
>>            'url': 'http://cccc',
>>            'title': 'Identify features by clicking',
>
> then change the next line to be:
>              'layers': [test],
>
>>            'layers': "test",
>
> I think that might fix things up for you.
>
> -Steve W
>
>
>>            'queryVisible': true
>>           })};
>>        for (var i in info) {
>>            info[i].events.register("getfeatureinfo", this, showInfo);
>>            map.addControl(info[i]);
>>        }
>>
>>      info.click.activate();
>>   ....
>>   }
>>
>>    function showInfo(evt) {
>>        if (evt.features && evt.features.length) {
>>             highlightLayer.destroyFeatures();
>>             highlightLayer.addFeatures(evt.features);
>>             highlightLayer.redraw();
>>        } else {
>>            $('responseText').innerHTML = evt.text;
>>        }
>>    }
>>
>>
>>
>> In mapserver I've defined the layer and all wms_... parameters
>> LAYER
>>
>>  METADATA
>>      "wms_title" "IVS90 Stremmingen"
>>      "wms_include_items" "all"
>>       "wms_feature_info_mime_type" "text/html"
>>   END
>>
>>  TYPE POINT
>>  TOLERANCE 10
>>  TOLERANCEUNITS kilometers
>>  ...
>>
>>  CLASS
>>       TEMPLATE "template.html"
>>       ...
>>  END
>>
>> END
>>
>>
>>
>>
>>
>>
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>
>