dBox with mode=itemquery or itemnquery

[Richard Greenwood]

Steve,

Thanks for the reply. Your approach makes total sense. I was sort of
thinking along those lines, but I figured I'd check in with the
experts before I tried to implement it myself.

Different topic - I have a partial javascript port of the Proj.4 CS2CS
program for client-side coordinate system transformations. I've got a
demo of it with dBox which I hope to get on a public site soon.

Rich

-- 
Richard Greenwood
richard.greenwood at gmail.com
www.greenwoodmap.com



On 7/17/06, Steve Lime <Steve.Lime at dnr.state.mn.us> wrote:
> Rich: This is where AJAX can really help. The dbox code really doesn't help you here. It gives you the
> tools to do something with the query result but not with the query itself.
>
> So, to do this you need 2 things or so:
>
>   1) a method that is called to trigger the search (e.g. myLookup), and process the response
>   2) a query template(s) to package the results for use in the client
>
> One might look like:
>
> function myLookup(map, layer, item, term)
> {
>     var URL = map.mapserver + '?map=' + map.mapfile + '&mode=itemquery&qlayer=' + layer + '&qitem=' + item + '&qstring=' + term;
>     var response = get_content(URL);
>
>     // parse the response somehow, check for errors and such... (in this case the response is just a delimeted line, see template)
>     var tokens = response.split(',');
>
>    map.setExtent(tokens[1], tokens[2], tokens[3], tokens[4]);
>    map.draw();
> }
>
> Two might look like (simple delimited response):
>
> [NAME],[shpminx],[shpminy],[shpmaxx],[shpmaxy]
>
> Does this sort of make sense? You could respond with XML and use that to drive some interface stuff- your choice. I suppose one could write a dbox add-on to turn myLookup into a more formal feature of the software with a callback and all.
>
> Steve
>
> >>> Richard Greenwood <richard.greenwood at GMAIL.COM> 7/17/2006 10:05:27 AM >>>
> I am working with Steve's dBox and mapserv.js. It's great stuff. Does
> anyone have any examples or suggestions for using mode=itemquery or
> itemnquery? Specifically, how are you getting the new extent from the
> server into the javascript map object? And how are you updating the
> main map image (in mode=map you get an image back, but in
> mode=anything_else you get an image in a directory on the server).
>
> Rich
>
> --
> Richard Greenwood
> richard.greenwood at gmail.com
> www.greenwoodmap.com
>
>