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attention.html
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attention.html
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<!DOCTYPE html>
<html>
<head>
<title>attention</title>
<meta charset="utf-8">
<script type="text/javascript" src="jquery-1.11.3.min.js"></script>
<style type="text/css">
.ctn{
background: #fff;
border: 1px solid red;
width: 680px;
height: 380px;
position: fixed;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;
}
.ctn div{
position: absolute;
width: 200px;
height: 100px;
background: #ddd;
cursor: pointer;
line-height: 100px;
text-align: center;
font-size: 40px;
}
.ctn div.active{
background: red;
color: #fff;
}
</style>
<body>
<section id="ctn" class="ctn">
</section>
<script type="text/javascript">
var data = [
{id: 'div1', top: '20px', left: '20px', active: true},
{id: 'div2', top: '20px', left: '240px', active: true},
{id: 'div332', top: '20px', left: '460px', active: true},
{id: 'div4', top: '140px', left: '20px', active: true},
{id: 'div5', top: '140px', left: '240px', active: true},
{id: 'div6321', top: '140px', left: '460px', active: false},
{id: 'div7', top: '260px', left: '20px', active: false},
{id: 'div8', top: '260px', left: '240px', active: false},
{id: 'div9', top: '260px', left: '460px', active: false}
]
showDOM(data, 'ctn');
//生成DOM并添加事件
function showDOM(data, ctnSelecterId) {//传数据data和容器选择器id ctnSelecterId
//根据数据生成元素
var fragment = '';
data.forEach(function(item, i){
fragment += '<div id="'+ item.id +'" class="'+ (item.active ? 'active' : '') +'" style="top: '+ item.top +'; left: '+ item.left +'" index="'+ i +'">'+ (i + 1) +'</div>';
i % 3 == 0 ? (item.isfirst = true) : (item.isfirst = false);
});
$('#' + ctnSelecterId).html(fragment);
//元素点击时移除或添加active
$('#' + ctnSelecterId).on('click', 'div', function(){
var id = $(this).attr('id');
var isActive = $(this).hasClass('active');
var index = Number($(this).attr('index'));
if(isActive){
removeActive(index);
}else{
addActive(index);
}
});
}
//移除active
function removeActive(index){
var sourceObj = data[index];
var lastActiveIndex;
for(var i = data.length - 1; i >= 0; i--){
if(data[i].active){
lastActiveIndex = i;
break;
}
}
//最后一个active的刚好是自己
if(lastActiveIndex == index){
$('#' + sourceObj.id).removeClass('active');
sourceObj.active = false;
return;
}
var targetObj = data[lastActiveIndex];
sourceObj.top = targetObj.top;
sourceObj.left = targetObj.left;
sourceObj.active = false;
var oldflag = sourceObj.isfirst;
sourceObj.isfirst = targetObj.isfirst;
$('#' + sourceObj.id).attr('index', lastActiveIndex).removeClass('active').animate({top: sourceObj.top, left: sourceObj.left}, 500);
var flag = false;
for(var i = index + 1; i <= lastActiveIndex; i++) {
data[i - 1] = data[i];
if(!data[i].isfirst) {
data[i].left = parseInt(data[i].left) - 220 + 'px';
if(flag) {
data[i].isfirst = true;
flag = false;
}
} else {
data[i].left = parseInt(data[i].left) + 440 + 'px';
data[i].top = parseInt(data[i].top) - 120 + 'px';
data[i].isfirst = false;
flag = true;
}
$('#' + data[i].id).attr('index', i - 1).animate({top: data[i].top, left: data[i].left}, 500);
}
data[index].isfirst = oldflag;
data[lastActiveIndex] = sourceObj;
}
//添加active
function addActive(index){
var sourceObj = data[index];
var firstUnactiveIndex;
for(var i in data){
if(!data[i].active){
firstUnactiveIndex = i;
break;
}
}
//第一个非active刚好就是自己
if(firstUnactiveIndex == index){
$('#' + sourceObj.id).addClass('active');
sourceObj.active = true;
return;
}
var targetObj = data[firstUnactiveIndex];
sourceObj.top = targetObj.top;
sourceObj.left = targetObj.left;
sourceObj.isfirst = targetObj.isfirst;
sourceObj.active = true;
$('#' + sourceObj.id).attr('index', firstUnactiveIndex).addClass('active').animate({top: sourceObj.top, left: sourceObj.left}, 500);
for(var i = index - 1; i >= firstUnactiveIndex; i--) {
if(data[i - 2] && data[i - 2].isfirst) {
data[i].left = parseInt(data[i].left) - 440 + 'px';
data[i].top = parseInt(data[i].top) + 120 + 'px';
data[i].isfirst = true;
} else {
data[i].left = parseInt(data[i].left) + 220 + 'px';
data[i].isfirst = false;
}
data[i + 1] = data[i];
$('#' + data[i].id).attr('index', i + 1).animate({top: data[i].top, left: data[i].left}, 500);
}
data[firstUnactiveIndex] = sourceObj;
}
</script>
</body>
</html>