[Users] how to find a layer in layertree

[IT Intern]

hmm this might be a brute-force way of doing this, but I think writing an
event handler for everytime a new layer is added (assuming by button click)
you traverse the entire tree..

for(var c = 0; c <
layerRoot.getOwnerTree().getNodeById(parent.id).childNodes.length;
c++){
        layerRoot.getOwnerTree().getNodeById(parent.id).childNodes[c].eachChild(function(node)
{
            if (node.layer.name == map.getLayersByName(layerName)) {
               //then put logic in here...maybe create a count variable or
something like
                      layerExists += 1;
            }//end if
        });//end eachChild
    }//end for

Hope this gives you some kind of lead,

elshae

On Tue, Jan 18, 2011 at 12:09 PM, Robert Buckley
<robertdbuckley at yahoo.com>wrote:

> Hi,
>
> I am trying to write a function which checks to see if a layer is present
> in the tree.
>
> if the layer already exists in the tree (or map) is shouldn´t be loaded...
>
>
> can anyone help?
>
> var clonename = clone.get("layer").name
>
>             if (mapPanel.layers(clonename)) {
>                 Ext.MessageBox.alert(null, "test");
>             }
>             else
>             {
>                 mapPanel.layers.add(clone);
>                 Ext.MessageBox.alert(null, clonename);
>             }
>
> Cheers
> Rob
>
>
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