callback function

[smokeman]

forgive me, but I'm struggling with MVC a bit.

I have a function I've defined in my controller, to get the mileage between 2 cities from google.
I get loc1, and loc2 from a gridpanel, with a rowediting plugin.
I added an edit event to the rowediting plugin, which is where I get the editor.record.data values to pass to this function.

I'm trying to return the value back to the edit event function, and I can't seem to figure out how to do a callback with architect.

getgmapsdistance:function(loc1,loc2){
var geocoder, location1, location2, gDir;

geocoder = new GClientGeocoder();
gDir = new GDirections();
GEvent.addListener(gDir, "load", function() {
    var drivingDistanceMiles = gDir.getDistance().meters / 1609.344;
    var gmiles = drivingDistanceMiles;
    //return gmiles;
});
var adr1=loc1 + ', AR, USA';
var adr2=loc2 + ', AR, USA';
geocoder.getLocations(adr1, function (response) {
    if (!response || response.Status.code != 200)
    {
        console.log("Sorry, we were unable to geocode the first address");
    }
    else
    {
        location1 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
        geocoder.getLocations(adr2, function (response) {
            if (!response || response.Status.code != 200)
            {
                console.log("Sorry, we were unable to geocode the second address");
            }
            else
            {
                location2 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
                gDir.load('from: ' + location1.address + ' to: ' + location2.address);

            }
        });
    }
});
}

I'm sure it's simple, I just can't figure it out.

here's the way I'm calling the function:

onGridroweditingpluginEdit:function(editor,e,options){
MyApp.controller.MyControllers.prototype.getgmapsdistance(editor.record.data.Td_trfrom,editor.record.data.Td_trto);

[smokeman]

I'd still be interested in other approaches, but I solved my issue by passing the entire record to the getdistance function, and once I got a google maps distance, I updated the data record with a rec.set(field,gdistance);

I'm sure my problem here, is from the value coming from the .load listener, so the only way I could think of to solve it was setting the value inside that function.

I'd still like to see a callback example in MVC