locator-encapsulate-this.js

function Locator(successCallback, errorCallback)
{
	var _this = this;

	this.success = function(location) 
	{
		console.dir(location);
		_this.pauseLocationUpdates();

		successCallback(location);

	};

	this.error = function()
	{
		console.log("Failed to access location"); 

		errorCallback();
	};

	this.pauseLocationUpdates = function()
	{
		if(_this.watchID !== null)
		{
			navigator.geolocation.clearWatch(_this.watchID);
			_this.watchID = null;
		}
	};

	this.options = {
		enableHighAccuracy: true, 
		maximumAge        : 30000, 
		timeout           : 27000
	};

	this.locate = function()
	{
		var browserSupportsLocation = "geolocation" in navigator;

		if (browserSupportsLocation) 
		{
			_this.watchID = navigator.geolocation.watchPosition(_this.success, _this.error, _this.options);
		} 
		else
		{
			_this.error();
		}
	};
}