Hi Ross,
Many thanks for the advice, and all makes perfect sense. My current problem
is most likely extremely trivial and a slight error in my syntax, but I'm
clouded by the new usage of the Google Map API's, so I need to make sure.
Here's my code:
___________________________________________________________
<head>
<script src="
http://maps.google.com/maps?file=api&v=2&sensor=false&key=ABQIAAAA04liSyPUEnzZyfxqwGgrZxQWhJ__TbHlqZWCEG2UZp394QQIBhTks2zomwmJx-Bee4BVk5Kf5v-hwg";
type="text/javascript"></script>
<script type="text/javascript">
<script src="
http://maps.google.com/maps?file=api&v=2&sensor=false&key=ABQIAAAA04liSyPUEnzZyfxqwGgrZxQWhJ__TbHlqZWCEG2UZp394QQIBhTks2zomwmJx-Bee4BVk5Kf5v-hwg";
type="text/javascript"></script>
<script type="text/javascript">
function getLength(from, to) {
alert("function triggered");
geocoder = new GClientGeocoder();
geocoder.getLatLng(from,function(from_gl) {
if (!from_gl) {
alert(from + " not found");
}
else {
geocoder.getLatLng(to,function(to_gl) {
if (!to_gl) {
alert(to + " not found");
}
else {
alert(to_gl.distanceFrom(from_gl));
}
});
}
});
}
function basicTest(){
alert("basic test");
}
</script>
<body>
<div id="distance"></div>
<div id="map"></div>
<a href="#" onClick="getLength("Sydney,NSW","Coogee,NSW");">Click
me</a><BR>
<a href="#" onClick="basicTest();">Click me</a><BR>
</body>
</html>
___________________________________________________________
The "basicTest" was done to double check I had paired off the {} brackets -
which originally it wasn't. I'm really scratching my head though as I don't
even get the alert of the "getLength()" to indicate it's entered the
function - for the life of me, I can't find out the reason this is though...
Anyone?
Cheers,
Jesse.
On Mon, Jun 8, 2009 at 6:38 PM, Rossko <[email protected]> wrote:
>
> GLatLng is the API's basic location object, it's a 'thing' not a
> function. It does come with built-in methods to operate on the
> location, such as .distanceFrom()
>
> geocoder.getLatLng() is method that returns you some data, that data
> is ready-structured as a GLatLng object for you by the API.
> As a GLatLng object, it has the distanceFrom() method built-in.
>
> Note that return of the data is asynchronous because of the round-trip
> to Google and back.
> http://econym.org.uk/gmap/async.htm
> Note that if you have only one geocoder object, and start re-using it
> before the previous result comes back, things will go wrong.
>
> Some structure like this should work (untested) -
> geocoder.getLatLng(from,function(from_gl) {
> if (!from_gl) {
> alert(from + " not found");
> }
> else {
> geocoder.getLatLng(to,function(to_gl)
> {
> if (!to_gl) {
> alert(to + " not
> found");
> }
> else {
> alert(to_gl.distanceFrom
> (from_gl));
> }
> }
> }
> }
>
>
> As soon as you do more than one geocode at a time, you may run into
> the issues described here -
> http://econym.org.uk/gmap/geomulti.htm
>
> Error checking any geocode request is probably a good idea
> http://econym.org.uk/gmap/geo.htm
> but that would preclude simple use of geocoder.getLatLng
>
> cheers, Ross K
> >
>
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