Sencha touch 2 - Display current location on map

Question

I want to display my current location and get location coordinates to search nearby. Starting with the code below to display my location on the map, but its not working.

Answer 1

I defined a custom map class:

Ext.define("FindMyMoney.view.MapView", {
    extend: "Ext.Map",
    xtype: 'mapview',
    config: {
        useCurrentLocation: true,
        listeners: {
            maprender : function(comp, map){
                new google.maps.Marker({
                    position: new google.maps.LatLng(this._geo.getLatitude(), this._geo.getLongitude()),
                    map: map
                });
            }
        }
    }
});

So it would render a marker on my current position. Simple.