On Feb 16, 5:15 pm, NP <[email protected]> wrote:
> Thanks Ross,
>
> I understand this problem.
Do you?
> And wrote code like below.
>
> var county=new Array(3);
> county[0]="Adams_IL";
> county[1]="Cook_IL";
> county[2]="Lake_IL";
> for(var i=0;i<county.length;i++){
> var geoXml = new GGeoXml("http://vconsign.net/
> images/"+county[i]+".kml");
> alert(geoXml.loadedCorrectly());
> alert(geoXml.getDefaultCenter());
> map.addOverlay(geoXml);
> }
>
> Why alert(geoXml.loadedCorrectly()) return false and if
> geoXml.getDefaultCenter() is null instead of lat,lng even geoxml
> object loaded perfectly in google map?
At the time the alert is run, geoXml has *not* loaded. It's loaded in
the background as a separate thread. If you delay execution enough
with your alerts, then by the time map.addOverlay() is reached, geoXml
will contain a GGeoXml object because it will have come back from
Google's servers by then.
You *need* a callback function to handle what comes back.
You may be able to get this to work by having a helper function to get
closure on your variables, rather like Mike's "createMarker" function.
Something like the following, perhaps (which is untested):
function makeGeoXml(i) {
var geoXml = new GGeoXml("http:...",
function() {map.addOverlay(geoXml);});
}
for(var i=0;i<county.length;i++){
makeGeoXml(i)
}
makeGeoXml is a helper function which keeps track of i and allows the
GGeoXml's callback to add it to the map -- or do anything else you
want. That helper function is called in the loop.
Andrew
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