map loading callback queue

gistfile1.js

Fabrik.cbQueue = {'google': []};
  	
		Fabrik.loadGoogleMap = function (s, cb) {
			
			var src = 'http://maps.googleapis.com/maps/api/js?sensor=' + s + '&callback=Fabrik.mapCb';
			
			// Have we previously started to load the Googlemaps script?
			var gmapScripts = $A(document.scripts).filter(function (f) {
				return f.src === src;
			});
			
			if (gmapScripts.length === 0) {
				// Not yet loaded so create a script dom node and inject it into the page.
				var script = document.createElement("script");
				script.type = "text/javascript";
				script.src = src;
				document.body.appendChild(script);
				
				// Store the callback into the cbQueue, which will be processed after gmaps is loaded.
				Fabrik.cbQueue.google.push(cb);
			} else {
				// We've already added the Google maps js script to the document
				if (Fabrik.googleMap) {
					window[cb]();
					
					// $$$ hugh - need to fire these by hand, otherwise when re-using a map object, like
					// opening a popup edit for the second time, the map JS will never get these events.
					
					//window.fireEvent('google.map.loaded');
					//window.fireEvent('google.radius.loaded');
					
				} else {
					// We've started to load the Google Map code but the callback has not been fired.
					// Cache the call back (it will be fired when Fabrik.mapCb is run.
					Fabrik.cbQueue.google.push(cb);
				}
			}
		};
		
		/**
		 * Called once the google maps script has loaded, will run through any queued callback methods and 
		 * fire them.
		 */
		Fabrik.mapCb = function () {
			Fabrik.googleMap = true;
			for (var i = 0; i < Fabrik.cbQueue.google.length; i ++) {
				window[Fabrik.cbQueue.google[i]]();
			}
			Fabrik.cbQueue.google = [];
		};