/*!
 * liScroll 1.0
 * Examples and documentation at: 
 * http://www.gcmingati.net/wordpress/wp-content/lab/jquery/newsticker/jq-liscroll/scrollanimate.html
 * 2007-2009 Gian Carlo Mingati
 * Version: 1.0.1 (07-DECEMBER-2009)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Requires:
 * jQuery v1.2.x or later
 * 
 */


jQuery.fn.liScroll = function(settings) {
		settings = jQuery.extend({
		travelocity: 0.07,
		startleft: 0
		}, settings);
		var speed = 0;
		var totalTravel = 0;
		var defTiming = 0;
        var $strip = jQuery(this);
		return this.each(function(){
				$strip.addClass("newsticker")
				var stripWidth = 0;
				var $mask = $strip.wrap("<div class='mask'></div>");
				var $tickercontainer = $strip.parent().wrap("<div class='tickercontainer'></div>");							jQuery('#speed-up').click(speedUp);
				jQuery('#slow-down').click(slowDown);
				jQuery('#scroll-on').click(start);
				jQuery('#scroll-off').click(stop);
				var containerWidth = $strip.parent().parent().width();	//a.k.a. 'mask' width 	
				$strip.find("li").each(function(i){
				stripWidth += jQuery(this, i).width();
				});
				$strip.width(stripWidth+3000);
				$strip.css('left',settings.startleft);		
				totalTravel = stripWidth+containerWidth;
				defTiming = totalTravel/settings.travelocity;	// thanks to Scott Waye		
				function scrollnews(spazio, tempo){
				$strip.animate({left: '-='+ spazio}, tempo, "linear", function(){$strip.css("left", containerWidth); scrollnews(totalTravel, defTiming);});
				}
				scrollnews(totalTravel, defTiming);				
				$strip.hover(function(){
				jQuery(this).stop();
				},
				function(){
				var offset = jQuery(this).offset();
				var residualSpace = offset.left + stripWidth;
				var residualTime = residualSpace/settings.travelocity;
				scrollnews(residualSpace, residualTime);
				});
				function speedUp() {
				    if (speed < (settings.travelocity * 3)) {
    				    $strip.stop();
    				    speed += settings.travelocity;
    				    defTiming = totalTravel / (speed);
    				    scrollnews(totalTravel, defTiming);
    				}
				}	
				function slowDown() {
				    if (speed > 0) {
    				    $strip.stop();
    				    speed -= settings.travelocity;
    				    defTiming = totalTravel / (speed);
    				    scrollnews(totalTravel, defTiming);
    				}
				}
				function stop() {
				    $strip.stop();
				}
				function start() {
				    scrollnews(totalTravel, defTiming);
				}	
		});	
};