[Users] MapPanel Class and allOverlays properties

[Arnaud Vandecasteele]

Hi Andreas,

Thank you for your answer. I understand much better the way of the tree
layer must be configuring.

See you soon for another question.

Regards


Arnaud

On Mon, Aug 3, 2009 at 6:01 PM, Andreas Hocevar <ahocevar at opengeo.org>wrote:

> Hi Arnaud,
>
> no need to change the MapPanel class. The allOverlays:true property is
> set using applyIf, which means only if this property is not provided by
> the user.
>
> So you just need a slightly modified mappanel config:
> var mapPanel = new GeoExt.MapPanel({
>        map: {
>             allOverlays: false,
>             controls: [
>                new OpenLayers.Control.Navigation()
>                ,new OpenLayers.Control.PanPanel()
>                ,new OpenLayers.Control.ZoomPanel()
>            ]
>        }
>        ,region : 'center'
>        ,title : 'map'
>        ,layers: [bluemarble]
>        ,extent: [-5, 35, 15, 55]
>    });
>
> Arnaud Vandecasteele wrote:
> > So my question is why the GeoExt developpers have decided to force the
> > allOverlays properties to false instead of true?
>
> Because most users will be working with OGC services, which don't make a
> distinction between base layers and overlays.
>
> Also note that you can still have exclusive layers, by leaving
> allOverlays:true and configuring the tree differently. The advantage is
> that you can drag/drop overlays to base layers and vice versa. The
> config option to look at (for the layer nodes) is checkedGroup.
>
> Regards,
> Andreas.
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
>
>


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