// JavaScript Document
// Coda-style slider as seen on jQuery for Designers
// http://jqueryfordesigners.com/coda-slider-effect/

function initSlider(isHorizontal, enableScrollButtons, slideTime)
{
		
		var $panels = $('#content .scrollContainer > div');
		var $container = $('#contentWrapper #content .scrollContainer');
		
		// if false, we'll float all the panels left and fix the width 
		// of the container
		var horizontal = isHorizontal;
		
		// float the panels left if we're going horizontal
		if (horizontal) {
		  $panels.css({
		    'float' : 'left',
		    'position' : 'relative' // IE fix to ensure overflow is hidden
		  });
		  
		  // calculate a new width for the container (so it holds all panels)
		  $container.css('width', $panels[0].offsetWidth * $panels.length);
		}
		
		var $scroll = $('#content .scroll').css('overflow', 'hidden');
		
		if(enableScrollButtons)
		{
			$scroll
			.before('<img class="scrollButtons left" src="images/scroll_left.png" alt="" />')
			.after('<img class="scrollButtons right" src="images/scroll_right.png" alt="" />');
			
		}
		
		// bind the navigation clicks to update the selected nav:
		$('#content .navigation').find('a').click(selectNav);
		
		// handle nav selection - lots of nice chaining :-)
		function selectNav() {
		  $(this)
		    .parents('ul:first') // find the first UL parent
			 .find('a') // find all the A elements
			   .removeClass('selected') // remove from all
			 .end() // go back to all A elements
		    .end() // go back to 'this' element
		    .addClass('selected');
		}
		
		function trigger(data) {
		  // within the .navigation element, find the A element
		  // whose href ends with ID ($= is ends with)
		  var el = $('#content .navigation').find('a[href$="' + data.id + '"]').get(0);
		  
		  // we're passing the actual element, and not the jQuery instance.
		  selectNav.call(el);
		}
		
		if (window.location.hash) {
		  trigger({ id : window.location.hash.substr(1)});
		} else {
		  $('#content .navigation a:first').click();
		}
		
		// offset is used to move to *exactly* the right place, since I'm using
		// padding on my example, I need to subtract the amount of padding to
		// the offset.  Try removing this to get a good idea of the effect
		var offset = parseInt((horizontal ? 
		  $container.css('paddingTop') : 
		  $container.css('paddingLeft')) 
		  || 0) * -1;
		
		
		var scrollOptions = {
		  target: $scroll, // the element that has the overflow
		  
		  // can be a selector which will be relative to the target
		  items: $panels,
		  
		  navigation: '.navigation a',
		  
		  // selectors are NOT relative to document, i.e. make sure they're unique
		  prev: 'img.left', 
		  next: 'img.right',
		  
		  // allow the scroll effect to run both directions
		  axis: 'xy',
		  
		  onAfter: trigger, // our final callback
		  
		  offset: offset,
		  
		  // duration of the sliding effect
		  duration: slideTime,
		  
		  // easing - can be used with the easing plugin: 
		  // http://gsgd.co.uk/sandbox/jquery/easing/
		  easing: 'swing'
		};
		
		// apply serialScroll to the slider - we chose this plugin because it 
		// supports// the indexed next and previous scroll along with hooking 
		// in to our navigation.
		$('#content').serialScroll(scrollOptions);
		
		// now apply localScroll to hook any other arbitrary links to trigger 
		// the effect
		$.localScroll(scrollOptions);
		
		// finally, if the URL has a hash, move the slider in to position, 
		// setting the duration to 1 because I don't want it to scroll in the
		// very first page load.  We don't always need this, but it ensures
		// the positioning is absolutely spot on when the pages loads.
		scrollOptions.duration = 1;
		$.localScroll.hash(scrollOptions);	
}