openlayers：获取所选功能的长度

Question

i'm using openlayers and geoExt.

what i have is this:

var options = {
        hover : true,
        box : true,
        onSelect : saveToJ
    };

    var select = new OpenLayers.Control.SelectFeature(vecLayer, options);
    map.addControl(select);
    select.activate();

now in saveToJ function i want to get length of selected feature (let's say feature = lineString):

function saveToJ(feature) {
    feature.getLength()
...
}

gives an error TypeError: Object #<Object> has no method 'getLength' , but from this i thought i can use it.

So: how can i get a length of selected feature?

Answer 1

getLength is a method of Geometry , not Feature .

So you should write feature.geometry.getLength() , see http://dev.openlayers.org/docs/files/OpenLayers/Geometry-js.html#OpenLayers.Geometry.getLength