[OpenLayers-Users] Overriding overlay select to force a reload of the toggled layer

[Adrian Popa]

Any ideas with this problem? Anyone?

Adrian Popa wrote:
> Hi everybody,
>
> I have several overlay vector layers that get their data in KML format 
> from some server-side scripts. The data is highly dynamic, so it needs 
> to be refreshed constantly (this is solved). The problem appears if only 
> one overlay layer is selected (visible), I need to refresh all overlay 
> layers so that if the user toggles another overlay, he will have the 
> most recent data. I would like to reduce the overhead on the server and 
> client side and only refresh the visible overlay layers, and to force a 
> refresh of a layer whenever the user makes it visible. For this I would 
> have to override the function that runs when a layer is selected in the 
> layer switcher and call another refresh function before the layer is 
> made visible. Can anyone point me in the right direction?
>
> P.S. I would like to do this without editing the openlayers code; 
> instead I would like to override/overload the function for my objects only.
>
> Thanks,
> Adrian
>
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