[OpenLayers-Users] Success! was: Couple of questions using WFS layer

[Stephen Woodbridge]

Thank you all for you help and advice!

I thought I would share my small success playing with wfs. The page 
loads county polygons and builds a list of their names. onHover over the 
name in the list or the polygon selects the polygon and highlights the 
name. I used jQuery for messing with the DOM elements.

devs if you think this would make a worthy example I'm happy to 
contribute it. You can use any polygons in an example.

If you want to pan you will need to use the layer switch to turn off the 
  wfs layer. I'll add select/navigate control later.

Also, any thoughts on better ways of doing this would be appreciated as 
I'm happy to learn more.

-Steve

Stephen Woodbridge wrote:
> Robert,
> 
> Thank you! that was obvious and documented. I must have read the WFS 
> page 2-3 times and never noticed the extractAttributes property. DUH!
> 
> Thanks,
>    -Steve
> 
> Robert Sanson wrote:
>> Hi Stephen
>>  
>> Here is some code I use. I load the WFS layer as a GML, and make sure 
>> that extractAttributes is set to True on load:
>>  
>> var apigml = new OpenLayers.Layer.GML("Selected Apiary",
>>                  
>> "http://10.65.192.1/cgi-bin/apimgwfs.exe?apiaryid="+apiaryid+"&request=getfeature&typename=apiaries&service=wfs&version=1.0.0&BBOX="+x1+","+y1+","+x2+","+y2 
>> <http://10.65.192.1/cgi-bin/apimgwfs.exe?apiaryid="+apiaryid+"&request=getfeature&typename=apiaries&service=wfs&version=1.0.0&BBOX="+x1+","+y1+","+x2+","+y2>,
>>                  {styleMap: myStyles, extractAttributes: true});
>>          map.addLayer(apigml);
>>          var options = {
>>                     hover: true,
>>                     onSelect: function(feature) {
>>                       OpenLayers.Util.getElement('apiary').innerHTML = 
>> "<strong>Apiary_id:</strong>" + feature.attributes.apiary_id + " 
>> <strong>Beekeeper_reg_no:</strong>" + 
>> feature.attributes.beekeeper_reg_no + " <strong>MAF_id:</strong>" + 
>> feature.attributes.maf_id
>> Cheers,
>>  
>> Robert Sanson                    }
>>
>>  >>> Stephen Woodbridge <woodbri at swoodbridge.com> 9/02/2009 10:26 a.m. >>>
>> Hi all,
>>
>> I'm making progress but can't find the attributes of the WFS features.
>>
>> My goal is to load a WFS layer, pull the attributes into a div as a
>> scrolling list of items and when you mouse over the item in the
>> scrolling list have it highlight the feature on the map.
>>
>> To start with, I'm approaching this backwards and just displaying the
>> WFS and highlighting the features onHover over the map, with the idea
>> that if I can grab the attributes and make a list, I can add onHover
>> handler to the list items and have them select the feature. Any way that
>> was my thought, but maybe there is a better way to do this.
>>
>> I assume I can hook the beforefeatureadded or featureadded to extract
>> the attributes and add them to the list in some div, assuming that I
>> have access to the attributes which is a problem at the moment.
>>
>> Thoughts and pointers to examples would be appreciated.
>>
>> Anyway, missing attributes - the attributes are in the XML, but do not
>> appear to be added to the features objects at least as far as I can tell
>> but looking in the DOM with firebug. And adding to the selectFeature
>> control:
>>
>> onSelect: function (feature) {
>>    alert(feature.attributes["gid"]);
>> }
>>
>> returns a undefined. Here is a link to the page:
>>
>> http://imaptools.com/maps2/test.html
>>
>> Once it loads and displays the vector layer, a hover will generate an alert.
>>
>> Thanks,
>>    -Steve
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>>
>>
>>
>>
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