[OpenLayers-Users] How can I show a picture a popup (URL for the pic should be read automatically from the attributes)

Tue Feb 3 15:09:35 EST 2009

Ok, that sounds like an idea. 

I´ve been reading a bit more about JavaScript-development in general. So I
developed the following change in the setHTML-function that allows me to
show a picture when the function is executed.

>>>

function setHTML(response){
var img = document.createElement("img");
img.setAttribute("src", "qu18_2.jpg");
document.getElementById('nodelist').innerHTML=response.responseText;
document.getElementById('pic-container').replaceChild(img,document.getElementById('pic-container').lastChild);}

This works fine for a predefined pic. But how can I get the specific
attribute that contains the URL out of the getFeatureRequest-response. So
what I´m searching for is something like "response.getContent[5]" (fictional
code ;-)).

So, as you see, by now it´s a bit abstract to me what I exactly get back
from this getFeatureRequest and how I can get further informations out of
it...

Thank you for your help Ivan and Till and thanks to everyone else in advance
Max Stephan

Till Adams wrote:
> 
> Max,
> 
> in general you need to define your output format which comes back from
> Geoserver as text or Xml or whatever - then you may parse the backcoming
> stuff and put the URL in an html image tag - basically you can see what to
> do regarding the OL featureinfo example:: 
> you must do alter it at the place when you receive the result from your
> WMS
> back and before you put it this in the result-div in your client - you'll
> have to parse it and rewrite it to html, alternatively you may define a
> template for your WMS which gives the results back in Html, so you can do
> sth like:
> 
> <html>
> ...
>  [URL] 
> ...
> 
> Where [URL] will be filled by your WMS server - this is mainly the
> proceeding I know from UMN mapserver.
> 
> Just some ideas - regards, Till
> 
> 
> "Max Stephan" <x.zam at gmx.net> schrieb:
>> Hey everybody!
>> 
>> I got a shapefile here which I added to my geoserver. I have integrated
>> it
>> as a layer in an openlayers map container. In the attributes of the
>> layer/shapefile is a field which contains an URL to a pic of each feature
>> (in this case the features are points). Now I want this picture to be
>> displayed in a popup (like it can be done in a marker layer). But I want
> to
>> have the URL automatically read from the attributes of the feature I´m
>> clicking on. It would be great to see some of the other attributes read
> from
>> the feature as well. The problem is I don´t know that much about the
>> OpenLayers-API. I only know how to write a GetFeatureRequest but this
> would
>> show me only the attribute table. If it´s too difficult to show a picture
>> which´s URL is in the attributes it would be even enough if the URL in
>> the
>> attribute table (the one I get from the GetFeatureRequest) would be
>> clickable.
>> 
>> Greets and thanks for your help in advance Max Stephan
>> 
>> _______________________________________________
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>> 
>> 
> 
> 
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