slider2.js
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/**
* (品牌优选)图片幻灯片插件
* @author: wangqing(robin.wang@yoho.cn)
* @date: 205/7/2
*/
var $ = require('yoho.jquery');
(function($) {
$.fn.slider2 = function(options) {
function autoplay(index, limit, toright) {
if (toright === true) {
$('.next').trigger('click');
if (index === (limit - 3)) {
autoplayrecycle(--index, limit, false);
} else {
autoplayrecycle(++index, limit, true);
}
} else {
$('.prev').trigger('click');
if (index === 0) {
autoplayrecycle(++index, limit, true);
} else {
autoplayrecycle(--index, limit, false);
}
}
}
function autoplayrecycle(index, limit, toright) {
window.setTimeout(autoplay, $.fn.slider2.defaults.delaytime, index, limit, toright);
}
function changePic(index, width, callback) {
var offersetleft = -(index * width);
$('.img-list')
.animate({
'margin-left': offersetleft + 'px'
}, 'slow', callback);
}
$.fn.slider2.defaults = {
index: 0,
shownum: 3,
autoplay: false,
delaytime: 3000
};
return this.each(function() {
var opts = $.extend({}, $.fn.slider2.defaults, options);
var mr = parseInt($('.img-item').css('margin-right'));
var $banneritems = $('.img-item');
var bannerarr = [];
var _width = $banneritems.outerWidth() + mr,
_size = $banneritems.length,
j = 0;
if (_size <= 3) {
$(this).find('.img-brand-switch').hide();
return;
}
for (j = 0; j < $banneritems.length; j++) {
bannerarr.push($banneritems[j]);
}
_size = bannerarr.length;
$(this).find('.img-list').css({
width: (_width * _size)
});
$(this).find('.next').on('click', function(e) {
var i = 0,
_obj = null;
e.preventDefault();
changePic(3, _width, function() {
for (i = 0; i < 3; i++) {
_obj = bannerarr.shift();
$('.img-item').parent().append(_obj.outerHTML);
bannerarr.push(_obj);
}
$('.img-item').first().remove();
$('.img-item').first().remove();
$('.img-item').first().remove();
$('.img-list').css({
'margin-left': '0'
});
});
});
$(this).find('.prev').on('click', function(e) {
var i = 0,
_obj = null,
offersetleft = '';
e.preventDefault();
for (i = 0; i < 3; i++) {
_obj = bannerarr.pop();
$('.img-item').parent().prepend(_obj.outerHTML);
bannerarr.unshift(_obj);
}
offersetleft = 3 * _width;
$('.img-item').last().remove();
$('.img-item').last().remove();
$('.img-item').last().remove();
$('.img-list').css({
'margin-left': -offersetleft + 'px'
});
changePic(0, _width);
});
if (opts.autoplay === true) {
autoplayrecycle(opts.index, _size, true);
}
});
};
}($));