jquery实现的缩略图预览滑块实例

(function($) {$.fn.thumbnailSlider = function(options) {var opts = $.extend({}, $.fn.thumbnailSlider.defaults, options);return this.each(function() {var $this = $(this),o = $.meta ? $.extend({}, opts, $pxs_container.data()) : opts;var $ts_container= $this.children('.ts_container'),$ts_thumbnails= $ts_container.children('.ts_thumbnails'),$nav_elems= $ts_container.children('li').not($ts_thumbnails),total_elems= $nav_elems.length,$ts_preview_wrapper= $ts_thumbnails.children('.ts_preview_wrapper'),$arrow= $ts_thumbnails.children('span'),$ts_preview= $ts_preview_wrapper.children('.ts_preview');/* 计算出$ts_thumbnails的尺寸：width -> width thumbnail + border (2*5)height -> height thumbnail + border + triangle height(6)top-> -(height plus margin of 5)left-> leftDot - 0.5*width + 0.5*widthNavDot 当鼠标经过导航的时候它将会被设定并且默认的值将会赋给导航的第一个预览点*/var w_ts_thumbnails= o.thumb_width + 2*5,h_ts_thumbnails= o.thumb_height + 2*5 + 6,t_ts_thumbnails= -(h_ts_thumbnails + 5),$first_nav= $nav_elems.eq(0),l_ts_thumbnails= $first_nav.position().left - 0.5*w_ts_thumbnails + 0.5*$first_nav.width();$ts_thumbnails.css({width: w_ts_thumbnails + 'px',height: h_ts_thumbnails + 'px',top: t_ts_thumbnails + 'px',left: l_ts_thumbnails + 'px'});/*计算出提示箭头的上方和左边的位置top-> thumb height + border(2*5)left-> (thumb width + border)/2 -width/2*/var t_arrow= o.thumb_height + 2*5,l_arrow= (o.thumb_width + 2*5) / 2 - $arrow.width() / 2;$arrow.css({left: l_arrow + 'px',top: t_arrow + 'px'});/*计算出$ts_preview的宽度->缩略图的宽度乘以所有缩略图的数量*/$ts_preview.css('width' , total_elems*o.thumb_width + 'px');/*设定 $ts_preview_wrapper 的宽度和高度 -> thumb width / thumb height*/$ts_preview_wrapper.css({width: o.thumb_width + 'px',height: o.thumb_height + 'px'});//鼠标经过导航的元素$nav_elems.bind('mouseenter',function(){var $nav_elem= $(this),idx= $nav_elem.index();/*计算出 $ts_thumbnails 最新的左侧距离*/var new_left= $nav_elem.position().left - 0.5*w_ts_thumbnails + 0.5*$nav_elem.width();$ts_thumbnails.stop(true).show().animate({left: new_left + 'px'},o.speed,o.easing); /*动画从 $ts_preview 的左侧过渡到右边的缩略图*/$ts_preview.stop(true).animate({left: -idx*o.thumb_width + 'px'},o.speed,o.easing);//当鼠标停留的时候图片进行放大if(o.zoom && o.zoomratio > 1){var new_width= o.zoomratio * o.thumb_width,new_height= o.zoomratio * o.thumb_height;//增加 $ts_preview 的宽度为了能够让图片放大var ts_preview_w= $ts_preview.width();$ts_preview.css('width' , (ts_preview_w - o.thumb_width + new_width) + 'px');$ts_preview.children().eq(idx).find('img').stop().animate({width: new_width + 'px',height: new_height + 'px'},o.zoomspeed);}}).bind('mouseleave',function(){//如果放大了设置它的宽度和高度为默认值if(o.zoom && o.zoomratio > 1){var $nav_elem= $(this),idx= $nav_elem.index();$ts_preview.children().eq(idx).find('img').stop().css({width: o.thumb_width + 'px',height: o.thumb_height + 'px'});}$ts_thumbnails.stop(true).hide();}).bind('click',function(){var $nav_elem= $(this),idx= $nav_elem.index();o.onClick(idx);});});};$.fn.thumbnailSlider.defaults = {speed: 100,// 幻灯片过渡的动画速度easing: 'jswing',// easing动画效果thumb_width: 75,//您的图片宽度thumb_height: 75,//您的图片高度zoom: false,//缩略图是否放大zoomratio: 1.3,// 放大比率（数值必须大于1）zoomspeed: 15000,//放大动画的速度onClick: function(){return false;}//点击回发};})(jQuery);