Thank you for your answers! this filter strategy is exactly what I am
looking for, but I just cant make it work.
In the example the vector layer is built using the protocol attribute, like
in the example I had seen before where they put the filter just in the
filter property of the vector layer (which didnt work for me neither)
But in my case I need to build the vector layer like this, using an array of
features.
// CREATE DETECTIONS LAYER
var styleAllDetections = { styleMap: new OpenLayers.StyleMap(
{"default": {graphicName: "circle"} } ) };
allDetections = new OpenLayers.Layer.Vector("Detections",
styleAllDetections);
var featuresAll = [];
<!-- FILL VECTOR LAYER WITH THE ITEMS OF THE DETECCTIONS LIST -->
<logic:iterate name="product" property="detections" id="item">
featuresAll.push(new OpenLayers.Feature.Vector(new
OpenLayers.Geometry.Point(<bean:write name="item" property="lon"/>,
<bean:write name="item" property="lat"/>),
{ id: <bean:write
name="item" property="id"/>,
lat: <bean:write
name="item" property="lat"/>,
lon: <bean:write
name="item" property="lon"/>,
confidence:
<bean:write name="item" property="confidence"/
} ) );
</logic:iterate>
allDetections.addFeatures(featuresAll);
map.addLayer(allDetections);
And maybe I am not accessing correctly to the property to filter. This is
what I tried:
var filter, filterStrategy;
filter=new
OpenLayers.Filter.Comparison({type:OpenLayers.Filter.Comparison.EQUAL_TO,property:
"lat",value: 55});
filterStrategy = new OpenLayers.Strategy.Filter({filter: filter});
var styleAllDetections = { strategies: [new OpenLayers.Strategy.Fixed(),
filterStrategy], styleMap: new OpenLayers.StyleMap( {"default":
{graphicName: "circle"} } ) };
allDetections = new OpenLayers.Layer.Vector("Detections",
styleAllDetections);
But all the features are displayed on the map. Has anyone try to filter in
vector layer where features where pushed in an array? Does any one have any
idea of how I can solve this??
Thanks!!
2010/9/28 Andreas Hocevar <[email protected]>
> Hi,
>
> you may want to have a look at the new Filter strategy:
>
>
> http://dev.openlayers.org/releases/OpenLayers-2.10/doc/apidocs/files/OpenLayers/Strategy/Filter-js.html
>
> This requires OpenLayers >= 2.10.
>
> Regards,
> Andreas.
>
> On Sep 28, 2010, at 10:58 , Joaquín Rodríguez-Guerra Urcelay wrote:
>
> > Hello list!
> >
> > I am trying to filter the features in a vector layer so I can decide
> which of them are displayed on the map and which are not. I have succesfully
> created the vector layer allDetections with the code below, and I can see
> all the detections in openlayers. But I cant fiter by a certain field. I
> used this code:
> >
> > allDetections.filter =new
> OpenLayers.Filter.Comparison({type:OpenLayers.Filter.Comparison.EQUAL_TO,property:
> 'confidencei',value: 1200});
> > allDetections.refresh({force: true});
> >
> > Executing these two lines when clicking on a button does nothing in the
> map,no filtering. Is this filtering possible? after googling for a while I
> cant find anything about filtering vector layers filled manually.
> >
> > I really appreciate your help! thanks!!
> >
> > Regards.
> >
> >
> > // CREATE DETECTIONS LAYER
> >
> > var styleAllDetections = { styleMap: new OpenLayers.StyleMap(
> {"default": {
> >
> graphicName: "ship",
> >
> rotation: "${heading}"
> >
> } ,
> >
> } ) };
> > allDetections = new OpenLayers.Layer.Vector("Detections",
> styleAllDetections);
> > var featuresAll = [];
> >
> > <!-- FILL VECTOR LAYER WITH THE ITEMS OF THE DETECCTIONS LIST -->
> > <logic:iterate name="product" property="detections" id="item">
> > featuresAll.push(new OpenLayers.Feature.Vector(new
> OpenLayers.Geometry.Point(<bean:write name="item" property="lon"/>,
> <bean:write name="item" property="lat"/>),
> > { id: <bean:write
> name="item" property="id"/>,
> > lat: <bean:write
> name="item" property="lat"/>,
> > lon: <bean:write
> name="item" property="lon"/>,
> > confidence:
> <bean:write name="item" property="confidence"/
> > } ) );
> > </logic:iterate>
> >
> > allDetections.addFeatures(featuresAll);
> > map.addLayer(allDetections);
> >
> > Best regards.
> > _______________________________________________
> > Users mailing list
> > [email protected]
> > http://lists.osgeo.org/mailman/listinfo/openlayers-users
>
>
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