Hi Yiannis,
Unfortunately there are no events at all for linestrings - only for
placemarks, the globe and the window.
Incidentally you can detect ctrl+click for these by using something
like the following...
--------------------------------------------------------
google.earth.addEventListener(ge.getGlobe(), "mousedown",
globeEventListener);
function globeEventListener(kmlEvent) {
var ctrlKey = kmlEvent.getCtrlKey();
var hitGlobe = kmlEvent.getDidHitGlobe();
if(1==ctrlKey && 1==hitGlobe)
{
alert("Ctrl+click on globe")
}
}
--------------------------------------------------------
See this page for more info:
http://code.google.com/apis/earth/documentation/introduction.html#events
Regards,
Fraser.