[OpenLayers-Users] Understanding events

[Scott Lewis]

Can you provide the code where the layer is created and added to the 
map?  I think from there, I can help show you how to add a listener to 
the layer to call a method when it's done loading.

Yves Moisan wrote:
> Hi List,
> 
> I'm trying to wrap my head around OpenLayers events.  Here's code that
> works if I uncomment the first line (alert) :
> 
> // alert("Highlight on")
> 
>     function selectFeature(layer, fid)
>     { 
>             for(var i = 0; i<DEFANGED_layer.features.length;++i)
>                   {         
>                         if (layer.features[i].fid == fid)
>                         {         
>                             FeatureSelectControl.select(layer.features[i]);
>                             break;             
>                         }
>                   }
>     }
> 
>     FeatureSelectControl = new OpenLayers.Control.SelectFeature( layers[0], {}); 
>     MyMap.addControl(FeatureSelectControl);
> 
>     FeatureSelectControl.activate();
> 
>     if(oFeatures && oFeatures.length > 0)                  
> 
>         {
>           var bounds = oFeatures[0].geometry.getBounds();
>           
>         // next line works if alert is "on"
>         // selectFeature(layers[0],oFeatures[0].fid);
> 
>         // how do I register an event to wait until layer ends loading ?  Tried variations of the following commands :
> 
>         // MyMap.events.register("zoomend", layers[0], selectFeature(layers[0],oFeatures[0].fid));
>         // layer.events.register("loadend", layers[0], selectFeature(layers[0],oFeatures[0].fid));
> 
>     ...
> 
> Problem is if I don't leave enough time for the layer to load, my
> selectFeature function doesn't work.  
> 
> I've seen there are different event types on different OL objects, so I
> tried registering events on the map and the layer objects (e.g. above),
> but obviously I do not understand how the event mechanism works.  Any
> tutorial on events that could help me understand events ?
> 
> TIA,
> 
> Yves
> 
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