AW: [OpenLayers-Users] Call a SLD file for a Vector Layer
gbrun
gbrun at myopera.com
Wed Jul 20 03:00:42 EDT 2011
Thanks for the update Andreas!
So now, it works... almost! Now, there is a problem when I apply the
selected style: when I add the layer without a style, it works, but when I
try to apply a style to a layer with a SLD file, it doesn't work. What is
quite strange is that, when I load a layer, I can see the layer while 1
second, until the style is effectively applied! Here is the code for my
"add layer" button, which allows to load a selected layer from my tree. I
apply the layer style at this moment because it avoids to load all the
style when I build my tree. The style is loaded only when the layer is
added.
bbar: ['->',{
text: "Add to the map",
handler: function() {
var node = layerCatalog.getSelectionModel().getSelectedNode();
if(node) {
var sld;
var layername = node.attributes.layer.name;
var url_sld = "sld/"+layername+".xml";
var format_sld = new OpenLayers.Format.SLD();
function setLayerStyles() {
// set the default style for each layer from sld
for (var l in sld.namedLayers) {
var styles = sld.namedLayers[l].userStyles, style;
for (var i=0,ii=styles.length; i<ii; ++i) {
style = styles[i];
node.attributes.layer.styleMap.styles["default"] = style;
break;
}
}
}
function complete(req) {
sld = format_sld.read(req.responseXML || req.responseText);
setLayerStyles();
}
OpenLayers.loadURL(url_sld, null, null, complete);
mapPanel.map.addLayer(node.attributes.layer);
}
}
}]
Any idea?
Geoffrey
On Tue, 19 Jul 2011 12:54:34 +0200, Andreas Hocevar <ahocevar at opengeo.org>
wrote:
> Hi,
>
> you may want to have a look at the updated sld example
> (http://openlayers.org/dev/examples/sld.html). Especially at the
> setLayerStyles function in http://openlayers.org/dev/examples/sld.js,
> which shows you how to link the styles to an already existing StyleMap
> of a layer.
>
> Andreas.
>
> On Tue, Jul 19, 2011 at 8:26 AM, gbrun <gbrun at myopera.com> wrote:
>> Thanks for your reply!
>>
>> So I tried to so something with the LoadURL. The SLD file is well
>> called (I
>> can see it in firebug), but the problem is that I now don't know how to
>> link
>> it with its layer. I'm still a newbie in webmapping. I think, what I
>> want to
>> do is quite easy, but I'm still not used to! Here is my current code:
>>
>> createWFSLayer: function(data, featureType) {
>>
>> //Style definition
>> var sld;
>> var layername = featureType.name;
>> var url_sld = "sld/"+layername+".xml";
>>
>> var format_sld = new OpenLayers.Format.SLD();
>>
>> OpenLayers.loadURL(url_sld, null, null, complete)
>>
>> function getDefaultStyle(sld, layerName) {
>> var styles =
>> sld.namedLayers[layerName].userStyles;
>> var style;
>> for(var i=0; i<styles.length; ++i) {
>> style = styles[i];
>> if(style.isDefault) {
>> break;
>> }
>> }
>> return style;
>> };
>>
>> function complete(req) {
>> sld = format_sld.read(req.responseXML ||
>> req.responseText);
>>
>> var styleMap = new OpenLayers.StyleMap({
>> "default":
>> getDefaultStyle(sld, layername)
>> });
>> return styleMap;
>> }
>>
>> var styleWFS = {styleMap: styleMap}
>>
>> //Layer options
>> var layerOptions, protocolOptions;
>> //Layer options definition
>> protocolOptions = {
>> url:
>> data.capability.request.getfeature.href.post,
>> featureType: featureType.name,
>> featureNS: featureType.featureNS,
>> outputFormat: "json",
>> readFormat: new
>> OpenLayers.Format.GeoJSON()
>> };
>> //Layer protocol definition
>> layerOptions = {
>> protocol: new
>> OpenLayers.Protocol.WFS(protocolOptions),
>> strategies: [new
>> OpenLayers.Strategy.Fixed()]
>> };
>> return new OpenLayers.Layer.Vector(
>> featureType.title,
>> layerOptions,
>> styleWFS
>> );
>> },
>>
>> My problem comes from the "complete" function. I can't get its result
>> for
>> the styleMap property of my layer!
>>
>> Geoffrey
>>
>>
>> On Mon, 18 Jul 2011 18:17:07 +0200, Arnd Wippermann
>> <arnd.wippermann at web.de>
>> wrote:
>>
>>> Hi,
>>>
>>> As far as I know you can't load data with OpenLayers.Format.SLD(url).
>>> You
>>> have to do it with an ajax call, i.e LoadUrl.
>>>
>>> Arnd
>>>
>>> -----Ursprüngliche Nachricht-----
>>> Von: openlayers-users-bounces at lists.osgeo.org
>>> [mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von gbrun
>>> Gesendet: Montag, 18. Juli 2011 12:32
>>> An: openlayers-users at lists.osgeo.org
>>> Betreff: [OpenLayers-Users] Call a SLD file for a Vector Layer
>>>
>>> Hi list!
>>>
>>> I would like to apply SLD styles to my vector layers. It should work
>>> like
>>> in
>>> this example : http://www.openlayers.org/dev/examples/sld.html
>>>
>>> But what I want to do is a little bit different: each layer has its own
>>> style. So I want that each vector layer calls its default style from a
>>> folder in my web application where styles are stored with the same
>>> name as
>>> their specific layer. For example, my application has a vector layer
>>> named
>>> "vector". In this case, this layer must called a SLD file named
>>> "vector.xml".
>>>
>>> The OpenLayers example uses a "OpenLayers.LoadURL()" method. I'm
>>> looking
>>> for
>>> a different way: I would like to read the SLD response without this
>>> method.
>>> It should look like this:
>>>
>>> var url_sld = "../sld/"+featureType.name+".xml";
>>> var format_sld = new
>>> OpenLayers.Format.SLD(url_sld);
>>>
>>> processResponse : function (response){
>>> var sld =
>>> format_sld.read(response.responseXML ||
>>> response.responseText);
>>> };
>>>
>>> But it doesn't work. I think, there is something that I don't
>>> understand
>>> when I read the SLD response.
>>>
>>> Can someone clarify me this?
>>>
>>> Geoffrey
>>>
>>>
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>>
>>
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>
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