///////////////////////////////////////////////////////////////////////
// imageScroller (1.0), Copyright (C) 2008 Max Kiusso
//
// Autor :		Max Kiusso - kiussoATgmailDOTcom
// Date :		2008 12 01
//
// REQUIRES jQuery 1.2+ <http://jquery.com/>
//
// Features:
// 		This software provide to create a multidirectional image
//		scroller with mouse events
//
// Configuration:	$( "#div" ).imageScroller( {options} )
//					
//					options:	speed (millisecond)
//								loading (text)
//								direction (left, right, top, bottom)
///////////////////////////////////////////////////////////////////////
// Additional modifications made to allow for fixed number of cycles (default is 3)
// and allow the user to stop the scrolling by focusing on any of the images. 
// This change means all images must be wrapped in a link tag even one that points to #
///////////////////////////////////////////////////////////////////////

( function( $ ) {
	$.fn.imageScroller = function ( options ) {
		return this.each( function() {
			var $this = $( this );
			var loadImgs = 0;
			
			var opt = $.extend( 
				{ 
					  speed: "2000"
					, loading: "Loading images..." 
					, direction: "left"
					, iterations: $( "img" , $this ).length * 3
				}
				, options || {}
			);
			
			$this.children().hide();
			$this.append(
				"<div style='clear:both; padding: 0px; margin: 0px;'>" + 
				"<div id='loading'>" + opt.loading + "</div>" + 
				"</div>"
			);
			
			$( "img" , $this ).load(
				function () {
					loadImgs++;
				}
			);
			var bStarted = true;
			var intVal = window.setInterval(
				function () {
				    // added or true because of issues with the loading logic in sharepoint
					if ( loadImgs == $( "img" , $this ).length || true ) {
						window.clearInterval( intVal );
						$( "#loading" ).remove();
						$this.children().show();
						var totImg = 0;
			
						$.each(
							  $this.children( ":not(div)" )
							, function () {
								switch ( opt.direction ) {
									case 'left':
									case 'right':
										if ( $( this ).children().length ) {
											$( this ).width( $( this ).children( ":eq(0)" ).width() );
										}
										totImg += $( this ).width();
										break;
									case 'top':
									case 'bottom':
										$( this ).css( "display" , "block" );
										if ( $( this ).children().length ) {
											$( this ).height( $( this ).children( ":eq(0)" ).height() );
										}
										totImg += $( this ).height();
										break;
								}
								
								$( this ).css({
									  margin:  "0px"
									, padding: "0px"
									, clear:   "both"
								});
								
								$( this ).bind(
									  "mouseover"
									, function () {
										$( "div:eq(0)" , $this ).stop();
									}
								).bind(
									  "mouseout"
									, function () {
									    if(bStarted)
									    {
									    	scrollStart( $( "div:eq(0)" , $this ) , opt );
										}
									}
								)
								
								$( this ).bind(
									  "focus"
									, function () {
										$( "div:eq(0)" , $this ).stop();
										bStarted = false;
									}
								).bind(
									  "blur"
									, function () {
										scrollStart( $( "div:eq(0)" , $this ) , opt );
										bStarted = true;
									}
								);
								
								$( "div:eq(0)" , $this ).append( $( this ) );
							}
						);
						
						switch ( opt.direction ) {
							case 'left':
								$( "div:eq(0)" , $this ).css( "width" , totImg + "px" );
								break;
							
							case 'right':
								$( "div:eq(0)" , $this ).css( "width" , totImg + "px" );
								$( "div:eq(0)" , $this ).css({
									marginLeft: -( totImg - $this.width() ) + "px"
								});
								break;
								
							case 'top':
								$( "div:eq(0)" , $this ).css( "height" , totImg + "px" );
								break;
								
							case 'bottom':
								$( "div:eq(0)" , $this ).css( "height" , totImg + "px" );
								$( "div:eq(0)" , $this ).css({
									marginTop: -( totImg - $this.height() ) + "px"
								});
								break;
						}
	                   
						scrollStart( $( "div:eq(0)" , $this ) , opt );
					}
				}
				, 100
			);
			
			function scrollStart ( $scroll , opt ) {
			    if(opt.iterations > 0)
			    {
				    switch ( opt.direction ) {
					    case 'left':
						    var pos = -( $scroll.children( ":eq(0)" ).width() );
						    var spd = opt.speed - ( Math.abs ( parseInt( $scroll.css( "marginLeft" ) ) ) * ( opt.speed / $scroll.children( ":eq(0)" ).width() ) );
						    break;
    						
					    case 'right':
						    var pos = -( $scroll.width() - $scroll.parents( "div:eq(0)" ).width() ) + $scroll.children( ":last" ).width();
						    var spd = opt.speed - ( ( $scroll.children( ":last" ).width() - ( Math.abs ( parseInt( $scroll.css( "marginLeft" ) ) ) - Math.abs ( pos ) ) ) * ( opt.speed / $scroll.children( ":last" ).width() ) );
						    break;
    						
					    case 'top':
						    var tos = -( $scroll.children( ":eq(0)" ).height() );
						    var spd = opt.speed - ( Math.abs ( parseInt( $scroll.css( "marginTop" ) ) ) * ( opt.speed / $scroll.children( ":eq(0)" ).height() ) );
						    break;
    						
					    case 'bottom':
						    var tos = -( $scroll.height() - $scroll.parents( "div:eq(0)" ).height() ) + $scroll.children( ":last" ).height();
						    var spd = opt.speed - ( ( $scroll.children( ":last" ).height() - ( Math.abs ( parseInt( $scroll.css( "marginTop" ) ) ) - Math.abs ( tos ) ) ) * ( opt.speed / $scroll.children( ":last" ).height() ) );
						    break;
				    }
    				
				    $scroll.animate(
					    {
						      marginLeft: ( pos || "0" ) + "px"
						    , marginTop: ( tos || "0" ) + "px"
					    }
					    , spd
					    , "linear"
					    , function () {
						    switch ( opt.direction ) {
							    case 'left':
								    $scroll.append( $( this ).children( ":eq(0)" ) );
								    $scroll.css( "marginLeft" , "0px" );
								    break;
    								
							    case 'right':
								    $scroll.prepend( $( this ).children( ":last" ) );
								    $scroll.css( "marginLeft" , -( $scroll.width() - $scroll.parents( "div:eq(0)" ).width() ) + "px" );
								    break;
    								
							    case 'top':
								    $scroll.append( $( this ).children( ":eq(0)" ) );
								    $scroll.css( "marginTop" , "0px" );
								    break;
    								
							    case 'bottom':
								    $scroll.prepend( $( this ).children( ":last" ) );
								    $scroll.css( "marginTop" , -( $scroll.height() - $scroll.parents( "div:eq(0)" ).height() ) + "px" );
								    break;
						    }
    						opt.iterations--;
						    scrollStart( $scroll , opt );
					    }
				       );
				}
			};
		});
	};
})(jQuery);