You arent tell us that much what you want to do with the rectangle, but
I am assuming that you want the lat/lon coordinates of the corners when
drawing complete.
I would create a vector layer. eg
selectedLayer = new OpenLayers.Layer.Vector("Selected Layer", {
wrapDateLine: true,
displayOutsideMaxExtent: true,
displayInLayerSwitcher: false,
});
map.addLayer(selectedLayer);
I would use DrawFeature on that selectedLayer, with a Box Handler.
eg
boxControl = new OpenLayers.Control.DrawFeature(selectedLayer,
OpenLayers.Handler.Box,{});
I would then register a featureadded event to
boxControl.events.register("featureadded", this, function (e) {
// add your code here to deal with the event.
e.feature.geometry will have to corner verticies.
selectedLayer.destroyFeatures; // clear the vector layer
after you are finished with it.
}
Note that the geometry will be in the map projection. You may need to
unproject to get lat/long.
Caveat - I havent done this with box, only with polyogin.
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