Tumblr bgchanger

bgchanger.js

	//(function(){
	//Refer http://code.google.com/apis/picasaweb/docs/2.0/reference.html

	// Album url can be obtained by getting the rss feed of a Public or Limited album
	var album_url = "https://picasaweb.google.com/data/feed/base/user/104873802064687726116/albumid/5710488196657525265?"+ // The base url
	//Query Parameters 
	"alt=json"+ // Options are json and rss , 
	"&kind=photo"+
	"&authkey=Gv1sRgCIC0zJCjrbqplwE"+//Necessary only because the album's visibility is Limited , link only 
	"&hl=en_GB"+//Language
	"&prettyprint=true"+ // Only enable in Development mode
	"&imgmax=1600"; // Max size of each of the images

	var PicList  = new Array();
	var slide_show_pic = $("body");

	function _generateRandomImageNumber(){
		// Not for public use
		return Math.floor(Math.random() * PicList.length);
	}

	function getRandomImage(){
		var img = new Image();
		img.src = PicList[_generateRandomImageNumber()];
		return img;
	}

	function paintImage(img){
		// @param : an object of type Image
		img.onload = function(){
			slide_show_pic.css('background','url('+img.src+')');
		};
	}

	function paintRandomImage(){
		paintImage(getRandomImage());
	}

	$(document).ready(function(){

		//Get the Feed data from Picasa
		$.getJSON(album_url, function(data) {
			//Push the Url of each image
			$.each(data.feed.entry, function(key, val) {
				PicList.push(val.content.src);
			});
			// Paint on Page and feed loads
			paintRandomImage();
			// Paint new image every x milli seconds
			setInterval(paintRandomImage,1000 * 10 );
		});
	});



	//})();