[OpenLayers-Users] How to handle a GeometryCollection Feature

[Eric Lemoine]

On Tue, Aug 25, 2009 at 3:00 PM, Max Weidemann<max.weidemann at freenet.de> wrote:
>
> Hi everybody
>
> my problem is that i dont know how i could at a new geometry to an
> GeometryCollection-Feature wich exists in an Vector layer.
>
> i have added the collection to the layer in a way like this:
>
> var gc_geometry = new OpenLayers.Geometry.Collection(
>              [
>                new OpenLayers.Geometry.Point( 1379550.27259943,
> 6678794.95971749),
>                new OpenLayers.Geometry.LineString( [p1,p2,p3] ),
>                new OpenLayers.Geometry.Polygon([
>                         new OpenLayers.Geometry.LinearRing([
>                                new
> OpenLayers.Geometry.Point(1378491.75288927, 6678659.00305747),
>                                new
> OpenLayers.Geometry.Point(1378491.75288927, 6679154.27374754),
>                                new
> OpenLayers.Geometry.Point(1379161.82499937, 6679154.27374754),
>                                new
> OpenLayers.Geometry.Point(1379161.82499937, 6678659.00305747),
>                                new
> OpenLayers.Geometry.Point(1378491.75288927, 6678659.00305747)])
>                // etc.
>              ])
>            ]);
>
>            var gc_feature = new OpenLayers.Feature.Vector( gc_geometry );
>
>            vectorLayer.addFeatures( [ gc_feature ] );
>
>>>> In other function i would like to add or remove some of the components
>
> i get the feature with code like this:
>       var feature = layer.getFeatureById(id);
>
>
> At this Point i do not know what is the smartest way to add or remove some
> components to the geometrycollection??

feature.geometry.addComponents([
    new OpenLayers.Geometry.Point(...),
    new OpenLayers.Geometry.Polygon(...)
]);

I think addComponents is documented in the API docs.

Cheers,

-- 
Eric Lemoine

Camptocamp France SAS
Savoie Technolac, BP 352
73377 Le Bourget du Lac, Cedex

Tel : 00 33 4 79 44 44 96
Mail : eric.lemoine at camptocamp.com
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