Moemoea

À partir du tuto making a jquery infinite carousel with nice features, quelques modif qui permettront une meilleure accessibilité.

La fenêtre de visualisation du carousel a par défaut la propriété
```
#carousel_inner{overflow: auto;}
```
cela permet à l'utilisateur ayant désactivé javascript d'avoir quand même accès au contenu.
L'overflow est changé pour hiddendans le javascript : $('.carousel_inner ').css({'overflow' : 'hidden'});

Le comportement des boutons de scroll gauche et droite sera défini dans le javascript :

	$("#left_scroll").click(function() {
		slide('left');
		return false;});
	$("#right_scroll").click(function() {
		slide('right');
		return false;});

J'ai trouvé aussi plus simple de positionner les boutons en absolu par rapport au container #carousel_container

#left_scroll, #right_scroll{
position: absolute; height:20px;width:20px; bottom: 0;
}
#right_scroll{right: 0;}

Dans le javascript, pour calculer item_width :

var item_width = $('.carousel_ul article').outerWidth(true);

Pour récupérer la valeur de left indent :

$('.carousel_ul').css({'left' : -item_width});

Ce qui donne :

  $(document).ready(function() {

        //options( 1 - ON , 0 - OFF)
        var auto_slide = 1;
            var hover_pause = 1;
        var key_slide = 1;

        //speed of auto slide(
        var auto_slide_seconds = 5000;
        /* IMPORTANT: i know the variable is called ...seconds but it's
        in milliseconds ( multiplied with 1000) '*/

        /*move the last list item before the first item. The purpose of this is
        if the user clicks to slide left he will be able to see the last item.*/
        $('.carousel_ul article:first').before($('.carousel_ul article:last')); 

        //check if auto sliding is enabled
        if(auto_slide == 1){
            /*set the interval (loop) to call function slide with option 'right'
            and set the interval time to the variable we declared previously */
            var timer = setInterval('slide("right")', auto_slide_seconds); 

            /*and change the value of our hidden field that hold info about
            the interval, setting it to the number of milliseconds we declared previously*/
            $('#hidden_auto_slide_seconds').val(auto_slide_seconds);
        }

        //check if hover pause is enabled
        if(hover_pause == 1){
            //when hovered over the list
            $('.carousel_ul').hover(function(){
                //stop the interval
                clearInterval(timer)
            },function(){
                //and when mouseout start it again
                timer = setInterval('slide("right")', auto_slide_seconds);
            });

        }

        //check if key sliding is enabled
        if(key_slide == 1){

            //binding keypress function
            $(document).bind('keypress', function(e) {
                //keyCode for left arrow is 37 and for right it's 39 '
                if(e.keyCode==37){
                        //initialize the slide to left function
                        slide('left');
                }else if(e.keyCode==39){
                        //initialize the slide to right function
                        slide('right');
                }
            });

        }
		
		$('.carousel_inner ').css({'overflow' : 'hidden'});
		 $("#left_scroll").click(function() {slide('left');
		 return false;});
		 $("#right_scroll").click(function() {slide('right');
		 return false;});


  });

//FUNCTIONS BELLOW

//slide function
function slide(where){

            //get the item width
            var item_width = $('.carousel_ul article').outerWidth(true);

            /* using a if statement and the where variable check
            we will check where the user wants to slide (left or right)*/
            if(where == 'left'){
                //...calculating the new left indent of the unordered list (ul) for left sliding
                var left_indent = parseInt($('.carousel_ul').css('left')) + item_width;
            }else{
                //...calculating the new left indent of the unordered list (ul) for right sliding
                var left_indent = parseInt($('.carousel_ul').css('left')) - item_width;

            }

            //make the sliding effect using jQuery's animate function... '
            $('.carousel_ul:not(:animated)').animate({'left' : left_indent},1000,function(){    

                /* when the animation finishes use the if statement again, and make an ilussion
                of infinity by changing place of last or first item*/
                if(where == 'left'){
                    //...and if it slided to left we put the last item before the first item
                    $('.carousel_ul article:first').before($('.carousel_ul article:last'));
                }else{
                    //...and if it slided to right we put the first item after the last item
                    $('.carousel_ul article:last').after($('.carousel_ul article:first'));
                }

                //...and then just get back the default left indent
                //... $('.carousel_ul').css({'left' : '-670px'});
				$('.carousel_ul').css({'left' : -item_width});
            });

}