//
// Loosely based on liScroll:
// http://www.gcmingati.net/wordpress/wp-content/lab/jquery/newsticker/jq-liscroll/scrollanimate.html
//
$.fn.icker = function(options) {
	options = $.extend({ }, $.fn.icker.defaults, options ? options : { });
	return this.each(function() {
		var $ticker = $(this);
		$ticker.wrap('<div class="' + options.maskClass + '"></div>');
		$ticker.parent().wrap('<div class="' + options.containerClass + '"></div>');

		var maskWidth  = $ticker.parent().parent().width();
		var totalWidth = 0;
		$ticker.find('li').each(function(i) {
			totalWidth += $(this, i).width();
		});
		$ticker.width(totalWidth);
		totalWidth += maskWidth;

		//
		// Unbinding and rebinding the hover() actions aren't
		// doing the right thing but a 'stopped' flag works
		// just as well.
		//
		var stopped   = false;
		var loopsLeft = options.loopFor;
		function animateTicker(dx) {
			$ticker.animate({ left: '-=' + dx }, 1000 * dx / options.speed, 'linear', runAnimation);
		}
		function runAnimation() {
			if(typeof loopsLeft != 'undefined') {
				if(loopsLeft <= 0) {
					stopped   = true;
					loopsLeft = options.loopFor;
					$ticker.css('left', '-' + $ticker.css('padding-left'));
					if(options.onLooped)
						options.onLooped();
					return;
				}
				--loopsLeft;
			}
			$ticker.css('left', maskWidth);
			animateTicker(totalWidth);
		}
		function pauseAnimation() {
			if(stopped)
				return;
			$ticker.stop();
		}
		function unpauseAnimation() {
			if(stopped)
				return;
			animateTicker(totalWidth + $ticker.offset().left);
		}
		function stopAnimation() {
			stopped = true;
			$ticker.stop();
		}
		function playAnimation() {
			stopped = false;
			animateTicker(totalWidth + $ticker.offset().left);
		}

		if(options.hoverPause)
			$ticker.hover(pauseAnimation, unpauseAnimation);
		if(options.controlPlay)
			$('#' + options.controlPlay).click(playAnimation);
		if(options.controlRestart
		&& options.onRestart)
			$('#' + options.controlRestart).click(function() { stopped = false; options.onRestart(); runAnimation(); });
		else if(options.controlRestart)
			$('#' + options.controlRestart).click(function() { stopped = false; runAnimation(); });
		if(options.controlStop)
			$('#' + options.controlStop).click(stopAnimation);

		runAnimation();
	});
};
$.fn.icker.defaults = {
	containerClass: 'ickerContainer',	// class for the container <div>
	controlPlay:     null,				// id of the "play" button
	controlStop:     null,				// id of the "stop" button
	controlRestart:  null,				// id of the "restart" button
	hoverPause:      true,				// pause the ticker on :hover?
	loopFor:         undefined,			// how many times should we loop? 'undefined' means forever
	maskClass:      'ickerMask',		// class for the mask <div>, this goes inside the container
	speed:           50,				// ticker speed, px/s
	onLooped:        null,				// callback for when we stop looping due to loopFor
	onRestart:     	 null				// callback for when the restart control is hit
};

// $HeadURL: http://192.168.1.66/svn/isos/tmpl/static/jquery/icker.js $
// $Id: icker.js 4609 2009-09-14 22:30:41Z mu $