[mapguide-users] how to refresh legend panel when create a dynamic layer ??

[Paul Spencer]

Right now, that is really the only way to refresh the legend - it  
currently gets its information from the map widget about which layers  
make up the map.  And the only way to tell the map to add a layer that  
was dynamically added from the server is to call reloadMap.

I agree that this is a performance problem.  Currently, the Map widget  
retrieves a lot of potentially unnecessary information about the  
layers and it would be nice to refactor this to be a bit smarter.  We  
would still need to call reloadMap I think but we could slim down what  
happens on the server side (in LoadMap.php) to just return the layer  
list rather than enumerate all the scale ranges and styles of each  
layer.  Then the Legend can be a bit smarter about requesting the  
scale range and style information for just layers that have changed.

I've filed http://trac.osgeo.org/fusion/ticket/75 to track this  
change, but it won't be something we tackle for a while - patches  
graciously accepted if someone else wants to tackle it.

Cheers

Paul

On 6-Jun-08, at 4:44 AM, foolfish wrote:

>
> i can use document.getElementById("Map").widget.aMaps[0].reloadMap()  
> to
> refresh both Legend and Map.but the problem is it's too slow~
>
> i want to know how to refresh Legend alone.
>
> Perhaps it's a bug of fusion, i guess～
>
> Can anyone answer to me?:thinking:
> -- 
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