Difference between revisions of "Image slider"
m (→The code) |
(→The code) |
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| Line 114: | Line 114: | ||
window.image_slider = function( slider, dir ) { | window.image_slider = function( slider, dir ) { | ||
| + | |||
| + | // Set the new image and animate to it (bail if already animating) | ||
var data = window.sliderdata[slider]; | var data = window.sliderdata[slider]; | ||
if( data.dir ) return; | if( data.dir ) return; | ||
data.image += dir; | data.image += dir; | ||
data.dir = dir; | data.dir = dir; | ||
| + | |||
| + | // Play an animation from the current image to the next | ||
data.div.animate({ t: data.w }, { | data.div.animate({ t: data.w }, { | ||
duration: 1000, | duration: 1000, | ||
| Line 123: | Line 127: | ||
var div = $(fx.elem); | var div = $(fx.elem); | ||
var data = window.sliderdata[div.attr('id')]; | var data = window.sliderdata[div.attr('id')]; | ||
| + | |||
| + | // Get the URLs for the current and next image | ||
var l = data.images.length; | var l = data.images.length; | ||
var image = data.image; | var image = data.image; | ||
| Line 130: | Line 136: | ||
var offset = -data.dir * fx.pos * data.w; | var offset = -data.dir * fx.pos * data.w; | ||
| + | // Set the URL and position for the current image | ||
$('th', div).css('background', 'transparent url("' | $('th', div).css('background', 'transparent url("' | ||
+ data.images[image] | + data.images[image] | ||
| Line 137: | Line 144: | ||
); | ); | ||
| + | // Set the URL and position for the next image | ||
$('td', div).css('background', 'transparent url("' | $('td', div).css('background', 'transparent url("' | ||
+ data.images[next]+'") no-repeat ' | + data.images[next]+'") no-repeat ' | ||
| Line 145: | Line 153: | ||
complete: function(now, fx) { | complete: function(now, fx) { | ||
var data = window.sliderdata[$(this).attr('id')]; | var data = window.sliderdata[$(this).attr('id')]; | ||
| − | data.dir = 0; | + | data.dir = 0; // mark current slider as no longer animating |
} | } | ||
}); | }); | ||
}; | }; | ||
</js> | </js> | ||
Revision as of 18:56, 20 March 2012
Here's a simple image slider written 100% in JavaScript and jQuery. In converts any div elements of class "image-slider" containing img elements in a slider like the one below. The code is shown below the example.
The code
<js> window.sliderdata = []; $(document).ready( function() {
$('div.image-slider').each( function() { var div = $(this);
// Create entry in common data for this slider window.currentslider = window.sliderdata.length; div.attr('id', window.currentslider); var slider = { image: 0, dir: 0, images:[], div: div }; window.sliderdata.push(slider);
// Store the image urls found in this slider in this sliders data $('img', div).css('display','none').each( function() { window.sliderdata[currentslider].images.push( $(this).attr('src') ); window.sliderdata[currentslider].w = $(this).attr('width'); window.sliderdata[currentslider].h = $(this).attr('height'); });
// Restructure the content of this sliders div into a table
div.html( '
' );
// Set the cell size to the image size $('table',div).css({ background: 'transparent', width: slider.w, height: slider.h, 'border-collapse': 'collapse' }); $('td,th',div).css({ padding: 0 });
// Initialise the table's images to first image with zero offset window.image_slider( window.currentslider, 0 ); }); });
window.image_slider = function( slider, dir ) {
// Set the new image and animate to it (bail if already animating) var data = window.sliderdata[slider]; if( data.dir ) return; data.image += dir; data.dir = dir;
// Play an animation from the current image to the next data.div.animate({ t: data.w }, { duration: 1000, step: function(now, fx) { var div = $(fx.elem); var data = window.sliderdata[div.attr('id')];
// Get the URLs for the current and next image var l = data.images.length; var image = data.image; image += l * 1000000; var next = ( image - dir ) % l; image %= l; var offset = -data.dir * fx.pos * data.w;
// Set the URL and position for the current image $('th', div).css('background', 'transparent url("' + data.images[image] + '") no-repeat ' + (offset + data.w * dir) + 'px center' );
// Set the URL and position for the next image $('td', div).css('background', 'transparent url("' + data.images[next]+'") no-repeat ' + offset + 'px center' ); }, complete: function(now, fx) { var data = window.sliderdata[$(this).attr('id')]; data.dir = 0; // mark current slider as no longer animating } }); }; </js>
