[OpenLayers-Users] Interactive hot spots on a map for large, complex vector geometries

[Rob Marjot]

Hi Phil,

Not sure if we understand eachother correctly. My point here is: I need
stuff tot hover over :)) So, I don't see how I could be fetching geometry
on hover.

Otherwise, I guess I'm on a similar track as you're pointing at, thanks.

By the wat, since JS is so slow, I'm choosing GeoJSON over WFS/GML.

Rob
Op 30 jun. 2014 00:46 schreef "Phil Scadden" <p.scadden at gns.cri.nz>:

>
>  I guess I forgot to mention: the idea is to have geometries highlighting
>> on hover / mouse-over...
>>
> Yep. I do that. Do WFSgetfeature in a hover handler.
>
> eg
>    hoverHandler = new OpenLayers.Handler.Hover({
>         map:map
>     },{});
>     hoverHandler.callbacks= {
>         "pause":function(e){
>   // do WFSgetfeature here
>         }
>     };
> hoverHandler.activate();
>
>
> Or,
>  hoverFeatures =  new OpenLayers.Control.GetFeature({
>                 protocol:myWfsProtocol,
>                 hover: true,
>                 propertyNames:myListOfFields,
>                 click:false,
>                 maxFeatures:1
>               });
>               hoverFeatures.events.register("hoverfeature", this,
> showFeature);
>               hoverFeatures.events.register("outfeature", this,
> function(evt) { clearFeature;});
>
> Or, have serverside function that is called on hover, which in turns make
> the WFS call to fetch the geometry and simplifies it based on zoom before
> passing up has GML. Ie do everything serverside if possible since js is so
> slow.
>
> You might want to look at the SLDSelect control which could also be called
> on Hover.
>
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