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javascriptgeolocationextjssencha-touch-2
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Reputation: 871

Sencha Touch 2 Ext.util.Geolocation

how can I get latitude and longitude outside created object? I've made new object of Ext.util.Geolocation, updated it, and now I'm trying to get Latitude and Longitude values outside the object, but it shows me 'null'. Code:

var geo = Ext.create('Ext.util.Geolocation', {
    autoUpdate: false,
    listeners: {
        locationupdate: function(geo) {
            //alert('New latitude: ' + geo.getLatitude());
        },
        locationerror: function(geo, bTimeout, bPermissionDenied, bLocationUnavailable, message) {
            if(bTimeout){
                alert('Timeout occurred.');
            } else {
                alert('Error occurred.');
            }
        }
    }
});

geo.updateLocation();
//geo.fireEvent('locationupdate');

alert(geo.getLatitude()); // it shows null

Thanks in advance.

Upvotes: 0

Views: 2421

Answers (2)

Mark Rhodes
Mark Rhodes

Reputation: 10217

This is just a timing issue - obtaining the location is not synchronous, therefore you can not access it outside the locationupdate callback function, at least until it has been initialized.

You should do whatever you need to do inside that callback (e.g. call another function passing in the latitude if it needs)...

    ...
    listeners: {
        locationupdate: function(geo) {
            yourCallbackFunction(geo.getLatitude());
    },
    ...

If you really need to use it outside that callback, then in the worst case you can do something like:

var latitude; //will store latitude when ready..
var geo = Ext.create('Ext.util.Geolocation', {
    autoUpdate: false,
    listeners: {
        locationupdate: function(geo) {
            latitude = geo.getLatitude();
        }
    }
});
geo.updateLocation();

//waits until latitude exists then does something..
var untilLatThere = setInterval(function(){
    if(latitude) {
        alert(latitude); //alerts a valid value..
        clearInterval(untilLatThere);
    }
}, 100);

Upvotes: 0

Titouan de Bailleul
Titouan de Bailleul

Reputation: 12949

It's probably because it takes some time to get your location.

You should try to get the latitude and the longitude within the locationupdate callback function.

If you want to access it outside, just make sure that geo exists

if (geo) { alert(geo.getLatitude()); }

Hope this helps

Upvotes: 1

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