[Users] filter wms layers in legend

[Bart van den Eijnden (OSGIS)]

Hi Ivan,

I think you should open up a Trac ticket, this is something we need to
handle/fix IMHO in the GeoExt legend. Patches welcome ofcourse :-)

The legend will only add new layers if they get added to the map / layer
store.

Best regards,
Bart

> Many thanks Bart,
> in effect your filter is perfect at start...
>
> the problem is that, as you suggested, it seems that the layers are not
> added to the legend container when a new layer is swithced to
> visibility: true.
>
> should I create some event on map or someting similar to force the
> legend to look for new visible layers ??
>
> many many thanks
>
> Ivan
>
>
>
>
> Il giorno ven, 17/12/2010 alle 12.39 +0100, Bart van den Eijnden (OSGIS)
> ha scritto:
>> Hi,
>>
>> you would do something like:
>>
>> filter: function(record) {
>>     return record.get('layer').visibility;
>> }
>>
>> However, I am not sure if layers will be added in the legend container
>> when you change the visibility of the layer to true, you would need to
>> test if this works okay or not.
>>
>> Best regards,
>> Bart
>>
>> > Dear GeoExt users..
>> > my GeoExt application use a GeoExt.LegendPanel object
>> >
>> > I have a lot of wms layers (67) added to the mapPanel.
>> > only two of these layers has visibility: true.
>> >
>> > It happen that each time I load the webpage the legend panel start to
>> > ask for the legend of each layer.
>> >
>> > that creates a lot of getLegend call towards the wms server which
>> become
>> > unstable...
>> >
>> > I would like to filter the layers to be displayed in the legendPanel
>> by
>> > means of the visibility property...
>> >
>> > in this way when I swich on another layer from the layers tree the
>> > legendPanel should execute the getLegend call.
>> >
>> > it seem that using this filter inside the GeoExt legendPanel object is
>> > not correct...
>> >
>> > filter: function(record) {
>> > 		return mapPannel.map.getLayersBy('visibility',true)
>> > 		}
>> >
>> > please give me some help...
>> >
>> > thanks
>> >
>> > Ivan
>> >
>> >
>> >
>> > --
>> > Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
>> > Preferisco formati liberi.
>> > Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
>> > I prefer free formats.
>> > http://it.wikipedia.org/wiki/Formato_aperto
>> > http://en.wikipedia.org/wiki/Open_format
>> >
>> > Ivan Marchesini
>> > Perugia (Italy)
>> > Socio fondatore GFOSS "Geospatial Free and Open Source Software"
>> > http://www.gfoss.it
>> > e-mail: marchesini at unipg.it
>> >         ivan.marchesini at gmail.com
>> > fax (home): +39(0)5782830887
>> > jabber: geoivan73 at jabber.org
>> > skype: geoivan73
>> > _______________________________________________
>> > Users mailing list
>> > Users at geoext.org
>> > http://www.geoext.org/cgi-bin/mailman/listinfo/users
>> >
>>
>>
>
> --
> Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
> Preferisco formati liberi.
> Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
> I prefer free formats.
> http://it.wikipedia.org/wiki/Formato_aperto
> http://en.wikipedia.org/wiki/Open_format
>
> Ivan Marchesini
> Perugia (Italy)
> Socio fondatore GFOSS "Geospatial Free and Open Source Software"
> http://www.gfoss.it
> e-mail: marchesini at unipg.it
>         ivan.marchesini at gmail.com
> fax (home): +39(0)5782830887
> jabber: geoivan73 at jabber.org
> skype: geoivan73
>