[Users] Customizing Layer Icons for a LayerContainer

[Adam Ratcliffe]

Hi Eric,

Thanks, that's the solution I was looking for.

BTW the current release (v0.7) of GeoExt.data.LayerStore does not have the getByLayer() method I used this code instead:

this.store.getById(attr.layer.id)

which worked fine.

Cheers
Adam

On 12/06/2010, at 7:03 AM, Eric Lemoine wrote:

> On Fri, Jun 11, 2010 at 4:57 AM, Adam Ratcliffe <adam at prema.co.nz> wrote:
>> Hi,
>> 
>> I have a TreePanel with a GeoExt.tree.LayerContainer like the one in
>> this example: http://dev.geoext.org/trunk/geoext/examples/layercontainer.html
>> 
>> For each layer displayed in the Layer Tree I would like to use an icon
>> based upon a property of the underlying LayerRecord.  I imagine this
>> is a fairly common use case but I'm struggling to understand how to do
>> it.  The best I've managed so far is to change the icon for all layers
>> to the same icon e.g.
>> 
>>                root: new GeoExt.tree.LayerContainer({
>>                    text: 'Map Layers',
>>                    loader: {
>>                        baseAttrs: {
>>                            iconCls: 'icon_layer',
>>                            store: layerStore
>>                        }
>>                    },
>>                    layerStore: layerStore,
>>                    leaf: false,
>>                    expanded: true
>>                }),       expanded: true
>>                }
> 
> Hi.
> 
> You can create a layer loader instance that overrides createNode:
> 
> var loader = GeoExt.tree.LayerLoader({
>   createNode: function(attr) {
>       attr.iconCls = this.store.getByLayer(attr.layer).get("icon");
>       GeoExt.tree.LayerLoader.prototype.createNode.call(this, attr);
>   }
> });
> 
> and give this loader to the layer container:
> 
>    root: new GeoExt.tree.LayerContainer({
>        loader: loader,
>        ...
>    })
> 
> Hope it'll work for you.
> -- 
> Eric Lemoine
> 
> Camptocamp France SAS
> Savoie Technolac, BP 352
> 73377 Le Bourget du Lac, Cedex
> 
> Tel : 00 33 4 79 44 44 96
> Mail : eric.lemoine at camptocamp.com
> http://www.camptocamp.com