Hi
Thanks for the link. I read through the ticket and feel that this answers
my question. But what I could not figure out is how to use teh event listener.
I have a layer like the below
var untiled_layer = new OpenLayers.Layer.WMS.Untiled(
"Overlay Layer", "http://localhost:8080/geoserver/wms";,
{
filter:'(<Filter><PropertyIsEqualTo><PropertyName>frequencyspec</PropertyName>
<Literal>BG</Literal></PropertyIsEqualTo></Filter>)',
srs: 'EPSG:4326',
layers: 'topp:radio',
transparent: 'true',
format: 'image/png'
},
{isBaseLayer: false, maxExtent: bounds}
);
untiled_bgCoverage.ratio=1;
untiled_bgCoverage.setVisibility(true);
map.addLayer(untiled_bgCoverage);
And I add the layer switcher as below
map.addControl(new OpenLayers.Control.LayerSwitcher());
Now I tried adding the event listener in two ways . But doesn't work
1)
map.events.register('layerswitched', map, function (e) {
log(" ----------- Visibility Changed --------------- ");
});
2)
untiled_devices.events.register('visibilitychanged', untiled_devices,
function (e) {
log(" ----------- Visibility Changed --------------- ");
});
But whenever I change the layers in the Layer Switcher teh log is not getting
printed. Am I doing it the right way. If not please let me know the way with a
few lines of code. Also I need to get the selected layers in the switcher from
inside the listener.
Lastly how do I apply the patch. How do I merge it with the
existing OpenLayers.js in my machine. Is it enough if I downlod the latest from
openlayers.org. It will be very helpful if someone guides me with this issue
Thanks in advance
ganesh
----- Original Message ----
From: Christian López Espínola <[EMAIL PROTECTED]>
To: Ganesh Jothikumar <[EMAIL PROTECTED]>
Cc: [email protected]
Sent: Monday, 26 November, 2007 7:36:15 PM
Subject: Re: [OpenLayers-Dev] OL LayerSwitcher Listener
Hi Ganesh,
I found this ticket with a patch attached, maybe it can help you.
http://trac.openlayers.org/ticket/878
Hope this helps.
On 11/26/07, Ganesh Jothikumar <[EMAIL PROTECTED]> wrote:
>
> Hi All
>
> I am using OpenLayers to display mutiple base layers and multiple
> overlays. Now I am using the Layer Switcher provided by OL API
> (map.addControl(new OpenLayers.Control.LayerSwitcher()))
> Now I have a requirement wherin depending on the layer selection in the
> Layer Switcher I have to filter the data. Is there a way wherin I can have a
> event listener for a Layer Switcher i.e. whenever someone changes the
> selection in the switcher a Java Script function needs to be called. And
> also I should be able to get teh list of selected layers in the switcher
> inside the function. Please let me know any way to do this. Any example
> would be vey helpful..
>
> Thanks in advance
> ganesh
> ________________________________
> Unlimited freedom, unlimited storage. Get it now
> _______________________________________________
> Dev mailing list
> [email protected]
> http://openlayers.org/mailman/listinfo/dev
>
>
--
Regards,
Christian López Espínola
Forgot the famous last words? Access your message archive online at
http://in.messenger.yahoo.com/webmessengerpromo.php_______________________________________________
Dev mailing list
[email protected]
http://openlayers.org/mailman/listinfo/dev
