136 lines
4.1 KiB
JavaScript
136 lines
4.1 KiB
JavaScript
/*
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By sean at 2010.07, modified on 2010.09.10;
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Example:
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$(".productshow").xslider({//.productshow是要移动对象的外框;
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unitdisplayed:3,//可视的单位个数 必需项;
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movelength:1,//要移动的单位个数 必需项;
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maxlength:null,//可视宽度或高度 默认查找要移动对象外层的宽或高度;
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scrollobj:null,//要移动的对象 默认查找productshow下的ul;
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unitlen:null,//移动的单位宽或高度 默认查找li的尺寸;
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nowlength:null,//移动最长宽或高（要移动对象的宽度或高度） 默认由li个数乘以unitlen所得的积;
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dir:"H",//水平移动还是垂直移动，默认H为水平移动，传入V或其他字符则表示垂直移动;
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autoscroll:1000//自动移动间隔时间 默认null不自动移动;
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});
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*/
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jQuery.extend(jQuery.easing,{
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easeInSine: function (x, t, b, c, d) {
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return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
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}
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});
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(function($){
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$.fn.xslider=function(settings){
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settings=$.extend({},$.fn.xslider.defaults,settings);
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this.each(function(){
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var scrollobj=settings.scrollobj || $(this).find("ul");
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var maxlength=settings.maxlength || (settings.dir=="H" ? scrollobj.parent().width() : scrollobj.parent().height());//length of the wrapper visible;
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var scrollunits=scrollobj.find("li");//units to move;
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var unitlen=settings.unitlen || (settings.dir=="H" ? scrollunits.eq(0).outerWidth() : scrollunits.eq(0).outerHeight());
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var unitdisplayed=settings.unitdisplayed;//units num displayed;
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var nowlength=settings.nowlength || scrollunits.length*unitlen;//length of the scrollobj;
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var offset=0;
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var sn=0;
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var movelength=unitlen*settings.movelength;
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var moving=false;//moving now?;
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var btnright=$(this).find("a.aright");
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var btnleft=$(this).find("a.aleft");
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if(settings.dir=="H"){
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scrollobj.css("left","0px");
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}else{
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scrollobj.css("top","0px");
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}
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if(nowlength>maxlength){
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btnleft.addClass("agrayleft");
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btnright.removeClass("agrayright");
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offset=nowlength-maxlength;
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}else{
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btnleft.addClass("agrayleft");
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btnright.addClass("agrayright");
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}
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btnleft.click(function(){
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if($(this).is("[class*='agrayleft']")){return false;}
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if(!moving){
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moving=true;
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sn-=movelength;
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if(sn>unitlen*unitdisplayed-maxlength){
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jQuery.fn.xslider.scroll(scrollobj,-sn,settings.dir,function(){moving=false;});
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}else{
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jQuery.fn.xslider.scroll(scrollobj,0,settings.dir,function(){moving=false;});
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sn=0;
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$(this).addClass("agrayleft");
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}
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btnright.removeClass("agrayright");
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}
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return false;
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});
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btnright.click(function(){
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if($(this).is("[class*='agrayright']")){return false;}
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if(!moving){
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moving=true;
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sn+=movelength;
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if(sn<offset-(unitlen*unitdisplayed-maxlength)){
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jQuery.fn.xslider.scroll(scrollobj,-sn,settings.dir,function(){moving=false;});
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}else{
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jQuery.fn.xslider.scroll(scrollobj,-offset,settings.dir,function(){moving=false;});//滚动到最后一个位置;
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sn=offset;
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$(this).addClass("agrayright");
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}
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btnleft.removeClass("agrayleft");
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}
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return false;
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});
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if(settings.autoscroll){
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jQuery.fn.xslider.autoscroll($(this),settings.autoscroll);
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}
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})
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}
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})(jQuery);
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jQuery.fn.xslider.defaults = {
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maxlength:0,
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scrollobj:null,
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unitlen:0,
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nowlength:0,
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dir:"H",
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autoscroll:null
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};
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jQuery.fn.xslider.scroll=function(obj,w,dir,callback){
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if(dir=="H"){
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obj.animate({
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left:w
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},500,"easeInSine",callback);
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}else{
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obj.animate({
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top:w
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},500,"easeInSine",callback);
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}
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}
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jQuery.fn.xslider.autoscroll=function(obj,time){
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var vane="right";
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function autoscrolling(){
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if(vane=="right"){
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if(!obj.find("a.agrayright").length){
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obj.find("a.aright").trigger("click");
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}else{
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vane="left";
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}
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}
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if(vane=="left"){
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if(!obj.find("a.agrayleft").length){
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obj.find("a.aleft").trigger("click");
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}else{
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vane="right";
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}
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}
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}
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var scrollTimmer=setInterval(autoscrolling,time);
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obj.hover(function(){
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clearInterval(scrollTimmer);
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},function(){
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scrollTimmer=setInterval(autoscrolling,time);
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});
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} |