[Users] How to add layers to LayerContainer?

[Adam Ratcliffe]

Hi Mehmet,

I haven't used grouped layer containers myself but am planning to look into using them sometime next week.  If I sort something out I'll get back in touch.

Cheers
Adam

On 6/08/2010, at 4:56 AM, Mehmet Sirin wrote:

> Thanks for the answer!
> The steps you describe is what i would do if i had no LayerContainers
> that group several layer. And these LayerContainers are created
> dynamically out of an xml-file. It looks like this:
> 
> <nameofGroup>
>   <layer1> <PointData / ><layer1 />
>   <layer2> <PointData / ><layer2 />
>   <layer3> <PointData / ><layer3 />
> </nameOfGroup>
> 
> The layers are first added to the OpenLayers.Map object. Then i
> iterate throug all groupNames and create  LayerContainer that contains
> all the three layers.  Then after the site is loaded and i want to add
> another group pushing a button which creates a single LayerContainer
> and appends it to the TreePanel.
> 
> I just found out how to add another layer to the container, but now
> have a problem:
> 
> var someLayer=new OpenLayers....
> 
> var myNewLayer= new GeoExt.tree.LayerNode({
>    layer: someLayer,
>    leaf: true,
>    expanded: true,
>    loader: {
>         baseAttrs: {
>                        radioGroup: "foo",
>                        uiProvider: "use_radio"
>                       }
>    }
> });
> 
> layerTree.getRootNode().findChild( "text","layerContainerName1"
> ).appendChild(myNewLayer);
> 
> 
> 
> The new appended myNewLayer is visible in the TreePanel and inside the
> group-folder but it does not have a radiobutton like all the other
> layers in the folder..
> Anyone know how?
> 
> 
> And maybe you have an idea how to do all the above described stuff in
> a better way? In short i want:
> -add new grouped layer containers to the tree panel (by clicking a button)
> -add new layer to a certain layer-group in the tree panel (by clicking
> a second button)
> 
> 
> I would appecriate your help !
> thank you
> 
> 2010/8/5 Adam Ratcliffe <adam at prema.co.nz>
>> 
>> Typically the steps would be these:
>> 
>> 1) Create an instance of OpenLayers.Map
>> 2) Create a GeoExt.MapPanel instance, passing it a reference to the map you created in step 1)
>> 3) Create an instance of GeoExt.tree.LayerContainer, setting it's "layerStore" config property to the "layers" property of the map panel created in step 2)
>> 
>> A GeoExt.data.LayerStore is implicitly created when you add the map to the map panel.  The layer store listens to the map's layer events and updates it's state accordingly therefore you can now add new layers to the map and nodes will be created for them by the tree panel which is bound to the layer store.
>> 
>> An example can be seen here: http://dev.geoext.org/trunk/geoext/examples/layercontainer.html
>> 
>> Cheers
>> Adam
>> 
>> On 5/08/2010, at 7:28 PM, Mehmet Sirin wrote:
>> 
>>> Hi, maybe you can help me adding a layer to a LayerContainer after  i have added this container to a TreePanel with some initial grouped layers ?
>>> 
>>> After the site is loaded I can add a LayerContainer to the layer-list of the TreePanel via: layerTree.getRootNode().appendChild(myLayerContainer);
>>> But as I said I don't know how to append a single layer to myLayerContainer..
>>> 
>>> 
>>> Thank you in advance for helping :)
>>> 
>>> bye
>>> 
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>>