JQuery gallery includes next and previous buttons
I am trying to make some kind of Turn Over Script gallery with jQuery. So I got an array with - let's say 13 - images:
galleryImages = new Array(
'images/tb_01.jpg',
'images/tb_02.jpg',
'images/tb_03.jpg',
'images/tb_04.jpg',
'images/tb_05.jpg',
'images/tb_06.jpg',
'images/tb_07.jpg',
'images/tb_08.jpg',
'images/tb_09.jpg',
'images/tb_10.jpg',
'images/tb_11.jpg',
'images/tb_12.jpg',
'images/tb_13.jpg'
);
My gallery looks like a grid showing only 9 images at a time. My current Script already counts the number of li elements in the #gallery, loads the first 9 images and displays them. HTML looks like this:
<ul id="gallery">
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
<ul id="gallery-controls">
<li id="gallery-prev"><a href="#">Previous</a></li>
<li id="gallery-next"><a href="#">Next</a></li>
</ul>
I am new to jQuery, my problem is that I cannot figure out how to split an array into pieces with 9 elements to attach it as a link to the control buttons. I need something like this:
$('#gallery-next').click(function(){
$('ul#gallery li').children().remove();
$('ul#gallery li').each(function(index,el){
var img = new Image();
$(img).load(function () {
$(this).css('display','none');
$(el).append(this);
$(this).fadeIn();
}).attr('src', galleryImages[index]); //index for the next 9 images?!?!
});
});
Thanks for the help!
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Try the following:
<html>
<head>
<style>
#gallery-prev, #gallery-next{text-decoration:underline;color:Blue;cursor:pointer;list-style:none;display:inline;padding:5px;}
#gallery li{list-style:none;display:inline;}
</style>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<script type="text/javascript">
galleryImages = new Array(
'images/tb_01.jpg','images/tb_02.jpg','images/tb_03.jpg',
'images/tb_04.jpg','images/tb_05.jpg','images/tb_06.jpg',
'images/tb_07.jpg','images/tb_08.jpg','images/tb_09.jpg',
'images/tb_10.jpg','images/tb_11.jpg','images/tb_12.jpg',
'images/tb_13.jpg');
function loadImages(p) {
var startIndex = parseInt($('ul#gallery').attr("startIndex")) + 9 * p;
if (startIndex < 1 || startIndex >= galleryImages.length) return;
$('ul#gallery')
.attr('startIndex', startIndex)
.find("li").children().remove().end()
.each(function(i, el) {
var nextID = startIndex - 1 + i;
if (nextID >= 0 && nextID < galleryImages.length) {
$(this).append($("<img src='" + galleryImages[nextID] + "' alt='image " + (nextID + 1) + "' />"));
}
});
}
$(document).ready(function() {
$('ul#gallery').attr('startIndex', '1');
for (var i = 1; i <= 9; i++)
$('ul#gallery').append("<li></li>");
loadImages(0);
$('li#gallery-prev, li#gallery-next').each(function(i) {
$(this).click(function() {
loadImages(i == 1 ? 1 : -1);
})
});
});
</script>
</head>
<body>
<ul id="gallery"></ul>
<ul id="gallery-controls">
<li id="gallery-prev">Previous</li>
<li id="gallery-next">Next</li>
</ul>
</body>
</html>
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Check out my solution for your problem .
Several important notes:
- I changed the way your buttons from the list work to two ranges.
- I have moved the line
$(el).append(img)
to a better place. -
curIndex
is the index of the last image. - To get the next index image, I used
curIndex+index
and then changed it with galleryImages.length so that it would overflow in an overflow loop rather than throwing errors. - You can't see the images (for obvious reasons), so I've added an index as text in each
<li>
so you can see what's going on.
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You can create a variable, for example var firstIndex = 0;
, to hold the array index of the first currently displayed image. You have your "next" button increasing it, and your "previous" button decreasing it as needed (by 1 or 9 or whatever you want). Add this value index
to your code.
Naturally, you will need to check the bounds of the array.
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