<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery淡入淡出瀑布流效果</title>
<style>
@charset "utf-8";
*{ margin:0; padding:0;}
body { font:12px/1.5 Arial; color:#666; background:#EDEDED;}
ul,li{ list-style:none;}
a{ color:#666; text-decoration:none;}
a:hover{ text-decoration:none; color:#000;}
img{border:0 none;}
#waterfall{ text-align:center; width:1000px; margin:0 auto;}
#waterfall img{ width:203px;}
#waterfall .cell{ padding:10px 0px 5px 0px; width:223px;border:1px solid #E3E3E3; background:#fff; margin-top:20px;box-shadow: 0px 2px 3px 1px #ccc;}
#waterfall .cell:hover{box-shadow: 0px 2px 3px 1px #999;}
</style>
<script src="http://files.cnblogs.com/files/heyiming/jquery-2.1.4.min.js"></script>
<script>
;(function($){
var
//参数
setting={
column_width:240,//列宽
column_className:'waterfall_column',//列的类名
column_space:10,//列间距
cell_selector:'.cell',//要排列的砖块的选择器，context为整个外部容器
img_selector:'img',//要加载的图片的选择器
auto_imgHeight:true,//是否需要自动计算图片的高度
fadein:true,//是否渐显载入
fadein_speed:600,//渐显速率，单位毫秒
insert_type:1, //单元格插入方式，1为插入最短那列，2为按序轮流插入
getResource:function(index){ } //获取动态资源函数,必须返回一个砖块元素集合,传入参数为加载的次数
},
//
waterfall=$.waterfall={},//对外信息对象
$waterfall=null;//容器
waterfall.load_index=0, //加载次数
$.fn.extend({
waterfall:function(opt){
opt=opt||{};
setting=$.extend(setting,opt);
$waterfall=waterfall.$waterfall=$(this);
waterfall.$columns=creatColumn();
render($(this).find(setting.cell_selector).detach(),false); //重排已存在元素时强制不渐显
waterfall._scrollTimer2=null;
$(window).bind('scroll',function(){
clearTimeout(waterfall._scrollTimer2);
waterfall._scrollTimer2=setTimeout(onScroll,300);
});
waterfall._scrollTimer3=null;
$(window).bind('resize',function(){
clearTimeout(waterfall._scrollTimer3);
waterfall._scrollTimer3=setTimeout(onResize,300);
});
}
});
function creatColumn(){//创建列
waterfall.column_num=calculateColumns();//列数
//循环创建列
var html='';
for(var i=0;i<waterfall.column_num;i++){
html+='<div class="'+setting.column_className+'" style="width:'+setting.column_width+'px; display:inline-block; *display:inline;zoom:1; margin-left:'+setting.column_space/2+'px;
margin-right:'+setting.column_space/2+'px; vertical-align:top; overflow:hidden"></div>';
}
$waterfall.prepend(html);//插入列
return $('.'+setting.column_className,$waterfall);//列集合
}
function calculateColumns(){//计算需要的列数
var num=Math.floor(($waterfall.innerWidth())/(setting.column_width+setting.column_space));
if(num<1){ num=1; } //保证至少有一列
return num;
}
function render(elements,fadein){//渲染元素
if(!$(elements).length) return;//没有元素
var $columns = waterfall.$columns;
$(elements).each(function(i){
if(!setting.auto_imgHeight||setting.insert_type==2){//如果给出了图片高度，或者是按顺序插入，则不必等图片加载完就能计算列的高度了
if(setting.insert_type==1){
insert($(elements).eq(i),setting.fadein&&fadein);//插入元素
}else if(setting.insert_type==2){
insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素
}
return true;//continue
}
if($(this)[0].nodeName.toLowerCase()=='img'||$(this).find(setting.img_selector).length>0){//本身是图片或含有图片
var image=new Image;
var src=$(this)[0].nodeName.toLowerCase()=='img'?$(this).attr('src'):$(this).find(setting.img_selector).attr('src');
image.onload=function(){//图片加载后才能自动计算出尺寸
image.onreadystatechange=null;
if(setting.insert_type==1){
insert($(elements).eq(i),setting.fadein&&fadein);//插入元素
}else if(setting.insert_type==2){
insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素
}
image=null;
}
image.onreadystatechange=function(){//处理IE等浏览器的缓存问题：图片缓存后不会再触发onload事件
if(image.readyState == "complete"){
image.onload=null;
if(setting.insert_type==1){
insert($(elements).eq(i),setting.fadein&&fadein);//插入元素
}else if(setting.insert_type==2){
insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素
}
image=null;
}
}
image.src=src;
}else{//不用考虑图片加载
if(setting.insert_type==1){
insert($(elements).eq(i),setting.fadein&&fadein);//插入元素
}else if(setting.insert_type==2){
insert2($(elements).eq(i),i,setting.fadein&&fadein);//插入元素
}
}
});
}
function public_render(elems){//ajax得到元素的渲染接口
render(elems,true);
}
function insert($element,fadein){//把元素插入最短列
if(fadein){//渐显
$element.css('opacity',0).appendTo(waterfall.$columns.eq(calculateLowest())).fadeTo(setting.fadein_speed,1);
}else{//不渐显
$element.appendTo(waterfall.$columns.eq(calculateLowest()));
}
}
function insert2($element,i,fadein){//按序轮流插入元素
if(fadein){//渐显
$element.css('opacity',0).appendTo(waterfall.$columns.eq(i%waterfall.column_num)).fadeTo(setting.fadein_speed,1);
}else{//不渐显
$element.appendTo(waterfall.$columns.eq(i%waterfall.column_num));
}
}
function calculateLowest(){//计算最短的那列的索引
var min=waterfall.$columns.eq(0).outerHeight(),min_key=0;
waterfall.$columns.each(function(i){
if($(this).outerHeight()<min){
min=$(this).outerHeight();
min_key=i;
}
});
return min_key;
}
function getElements(){//获取资源
$.waterfall.load_index++;
return setting.getResource($.waterfall.load_index,public_render);
}
waterfall._scrollTimer=null;//延迟滚动加载计时器
function onScroll(){//滚动加载
clearTimeout(waterfall._scrollTimer);
waterfall._scrollTimer=setTimeout(function(){
var $lowest_column=waterfall.$columns.eq(calculateLowest());//最短列
var bottom=$lowest_column.offset().top+$lowest_column.outerHeight();//最短列底部距离浏览器窗口顶部的距离
var scrollTop=document.documentElement.scrollTop||document.body.scrollTop||0;//滚动条距离
var windowHeight=document.documentElement.clientHeight||document.body.clientHeight||0;//窗口高度
if(scrollTop>=bottom-windowHeight){
render(getElements(),true);
}
},100);
}
function onResize(){//窗口缩放时重新排列
if(calculateColumns()==waterfall.column_num) return; //列数未改变，不需要重排
var $cells=waterfall.$waterfall.find(setting.cell_selector);
waterfall.$columns.remove();
waterfall.$columns=creatColumn();
render($cells,false); //重排已有元素时强制不渐显
}
})(jQuery);
</script>
</head>
<body>
<div id="waterfall">
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_1.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_2.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_3.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_4.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_6.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_7.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_8.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_9.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_10.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_11.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_12.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_1.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_13.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_14.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_8.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_5.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_6.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
<div class="cell"><a href="#"><img src="http://images.cnblogs.com/cnblogs_com/heyiming/947284/t_12.jpg" /></a><p><a href="javascript:void(0)">图片</a></p></div>
</div>
<script>
var opt={
getResource:function(index,render){//index为已加载次数,render为渲染接口函数,接受一个dom集合或jquery对象作为参数。通过ajax等异步方法得到的数据可以传入该接口进行渲染，如 render(elem)
if(index>=7) index=index%7+1;
var html='';
for(var i=20*(index-1);i<20*(index-1)+20;i++){
var k='';
for(var ii=0;ii<3-i.toString().length;ii++){
k+='0';
}
k+=i;
var src="http://cued.xunlei.com/demos/publ/img/P_"+k+".jpg";
html+='<div class="cell"><a href="#"><img src="'+src+'" /></a><p>'+k+'</p></div>';
}
return $(html);
},
auto_imgHeight:true,
insert_type:1
}
$('#waterfall').waterfall(opt);
</script>
</body>
</html>