[Users] How to find layer record from layer node ?

[Tim Schaub]

Alexandre Dube wrote:
> Hi,
> 
>    I want to remove a layer from a LayerContainer, MapPanel and Tree.  
> So far, destroying the layer (OL) and node.destroy() works, but the 
> layer is still in the MapPanel layers.  From the layertree node, is 
> there a simple way to remove the according MapPanel layer record ?  Or 
> is there a method doing all that at once ?
> 

If you have a MapPanel that is bound to a map, when you call 
map.removeLayer or layer.destroy, the corresponding layer record will be 
removed from the MapPanel's layer store.

In addition, if you have a MapPanel that is bound to a map and you call 
MapPanel.layers.remove, the layer corresponding record will be removed 
from the bound map.

In both of these cases, if you have used a LayerContainer that is 
configured with the MapPanel's layer store (as the LayerContainer's 
layerStore config property), the corresponding node will be removed from 
a tree when the layer is removed.

The same happens for adding layers.  This is how the LayerContainer 
example works:

http://dev.geoext.org/trunk/geoext/examples/layercontainer.html

In these cases, I think it is easiest to think of the layer store 
referenced by the MapPanel as the primary store.  The the map is a view 
of the records in this store.  The tree (in this case) can also be 
treated as a view.  A grid could be another view.  To keep things 
simple, don't call methods on the views.

Tim

>   Thanks,
> 


-- 
Tim Schaub
OpenGeo - http://opengeo.org
Expert service straight from the developers.