JavaScript 拖动布局dragFix

dn001 2009-09-10 21:07:02

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<title>拖动</title>
<style type="text/css">
*{font-size:14px;color:#666;padding:0;margin:0;}
a{text-decoration: none;color:#666;}
a:hover{text-decoration: underline;}
#pm_header{width:968px;margin:0 auto 8px auto;background:#4B5976;height:40px;}
#pm_main{width:968px;margin:auto;margin-bottom:10px;height:auto;}
#pm_foot{width:968px;height:15px;margin:10px auto;padding:5px 0;text-align:center;}
#main_left{float:left;width:180px;height:auto;}
#main_main{float:left;width:520px;margin:0 8px;height:auto;}
#main_right{float:right;width:250px;height:auto;}
.system_header_bar{width:auto;height:18px;border:1px solid #999;padding:5px;background:#E1EDF8;line-height:20px;}
.system_header_bar span{float:left;margin-right:4px;}
.system_header_bar a{float:right;margin-right:4px;}
.system_header_content{width:auto;height:auto;border:1px solid #999;border-top:0;margin-bottom:8px;padding:5px;}
/**
*按钮样式
*/
a.button_del{width:18px;height:18px;}
</style>
<script type="text/javascript">
var _dragFix =
{
Ctrl : false,; //拖动控制开关
Root : null,//拖动容器
Obj; : null,//拖动对象
Temp; : null,//临时插入块
Tempid :"drayTemp",
Sign : false,; //拖动标志
Range :null,//拖动对象活动范围 in表示只能在当前列拖动，out表示可以任意拖动
Change:false,; //布局是否有改动
Parent:null,//拖动对象所在列的ID
Header:"yes",;
Shape:null,;//阴影层
Rows; : [],;;//所有拖动列ID
PositionsX: [],
Row:null,//当前所在列

init:function(id)
{
_dragFix.Root = document.getElementById(id);
cleanWhitespace(_dragFix.Root);//清除空白节点
var dragRows = _dragFix.Root.childNodes;
for(var i=0;i<dragRows.length;i++)
{
if(dragRows[i].id)
{
_dragFix.Rows[i] = dragRows[i].id;
_dragFix.PositionsX[i] = getRealLeft(dragRows[i])-8;
}
}
if(!_dragFix.Rows.length) return; //如果容器中不含拖动列，结束
var dragC = _dragFix.Root.getElementsByTagName("DIV");
//alert(dragC.length);return;
for(var i = 0; i < dragC.length; i++)
{
if(dragC[i].getAttribute("drag") == "yes")
{
var o = dragC[i].firstChild;
o.onmousedown = _dragFix.start;
dragC[i].firstChild.style.cursor = "move";
dragC[i].style.position = "";
}
}//获取所有可拖动的对象
document.onmousemove = _dragFix.drag;
document.onmouseup = _dragFix.end;
_dragFix.Ctrl = true;
window.status = "拖动已开启";
},
start:function(e)
{
if(!_dragFix.Ctrl || $(_dragFix.Tempid)) return;
if(!e) e = window.event;
var obj = getT(e);
if("A" == obj.tagName) return;
if(obj.getAttribute("header") != _dragFix.Header) obj = obj.parentNode; //拖动头
_dragFix.Sign = true;//拖动准备就绪
_dragFix.Obj = obj.parentNode//要拖动的对象
_dragFix.Range = _dragFix.Obj.getAttribute("range");

_dragFix.Obj.initMouseX = getMouseX(e);
_dragFix.Obj.initMouseY = getMouseY(e);
_dragFix.Obj.initoffsetL = getRealLeft(_dragFix.Obj);
_dragFix.Obj.initoffsetY = getRealTop(_dragFix.Obj);
_dragFix.Obj.style.width = _dragFix.Obj.offsetWidth+"px";

if("in" == _dragFix.Range) window.status = "这个层只能在当前列拖动";
else window.status = "这个层可以任意拖动";

_dragFix.Temp = _dragFix.Obj.cloneNode(false); //临时插入块
_dragFix.Obj.parentNode.insertBefore(_dragFix.Temp,_dragFix.Obj);
_dragFix.Temp.id = _dragFix.Tempid;
with(_dragFix.Obj.style)
{
position = "absolute";
zIndex = 1000;
}

with(_dragFix.Temp.style)
{
width = "auto";
height = _dragFix.Obj.offsetHeight - 12 + "px";
border = "2px dotted red";
margin = "0 0 8px 0";
}
},
drag:function(e)
{
if(!_dragFix.Ctrl || !_dragFix.Sign || _dragFix.Obj==null) return;
if(!e) e = window.event;
var currenX = getMouseX(e); //鼠标当前X坐标
var currenY = getMouseY(e); //鼠标当前Y坐标
//var currenObjX = currenX;
//var currenObjY = currenY;
var currenObjX = getRealLeft(_dragFix.Obj);
var currenObjY = getRealTop(_dragFix.Obj);
//window.status = currenObjX + "-" +currenObjY;
if(_dragFix.Range != "in")
{
_dragFix.Obj.style.left = (_dragFix.Obj.initoffsetL +; currenX - _dragFix.Obj.initMouseX) + "px";
for(var i = 1; i < _dragFix.PositionsX.length; i++)
{
if(currenObjX > _dragFix.PositionsX[i]); _dragFix.Row = _dragFix.Rows[i];
else
{
_dragFix.Row = _dragFix.Rows[i-1];
break;
}
}
} //如果拖动层设置为只在当前列拖，则保持横坐标(X坐标)不变
else _dragFix.Row = _dragFix.Obj.parentNode.id;
//_dragFix.Obj.style.width = $(_dragFix.Row).offsetWidth;
//_dragFix.Temp.style.height = _dragFix.Obj.offsetHeight;
//window.status = "所在列："+_dragFix.Row;
_dragFix.Obj.style.top = (_dragFix.Obj.initoffsetY +; currenY - _dragFix.Obj.initMouseY) + "px";

var finded = false;

var dragC = $(_dragFix.Row).childNodes;
for(var i = 0; i < dragC.length; i++)
{
var o = dragC[i];
var sonT = getRealTop(o);
var sonH = o.offsetHeight;
var tH = sonT + parseInt(sonH/2);
var tH2 = sonT + sonH;
if(o.getAttribute("drag"))
{
if(currenObjY > sonT && currenObjY < tH)
{
$(_dragFix.Row).insertBefore(_dragFix.Temp,o);
break;
}
else if(currenObjY > tH && currenObjY < tH2 + 8)
{
if(o.nextSibling) $(_dragFix.Row).insertBefore(_dragFix.Temp,o.nextSibling);
else $(_dragFix.Row).appendChild(_dragFix.Temp);
break;
}
// else if()
}
}
// if(!finded) $(_dragFix.Row).appendChild(_dragFix.Temp);
return;
},
end:function()
{
if(!_dragFix.Ctrl || !_dragFix.Sign) return;
_dragFix.Sign = false;
_dragFix.timer = _dragFix.repos(150,15);//放开时回到新的位置
window.status = "拖动结束";
},
repos:function(aa,ab)
{
var tl=getRealLeft(_dragFix.Obj);
var tt=getRealTop(_dragFix.Obj);
var kl=(tl-getRealLeft(_dragFix.Temp))/ab;
var kt=(tt-getRealTop(_dragFix.Temp))/ab;
return setInterval(function(){
if(ab<1)
{
clearInterval(_dragFix.timer);
_dragFix.Temp.parentNode.insertBefore(_dragFix.Obj,_dragFix.Temp);
_dragFix.Obj.parentNode.removeChild(_dragFix.Temp);
with(_dragFix.Obj.style)
{
position = "";
zIndex = "";
width = "100%";
}
return;
}
ab--;
tl-=kl;
tt-=kt;
_dragFix.Obj.style.left=parseInt(tl)+"px";
_dragFix.Obj.style.top=parseInt(tt)+"px";
},aa/ab);
},
stop:function()
{
if(!_dragFix.Root)
{
windowCDtatus = "拖动未开启";
return;
}
var dragC = _dragFix.Root.getElementsByTagName("DIV");
for(var i = 0; i < dragC.length; i++)
{
if(dragC[i].getAttribute("drag") == "yes")
{
var o = dragC[i].firstChild;
dragC[i].firstChild.style.cursor = "";
}
}//获取所有可拖动的对象
_dragFix.Ctrl = false;
window.status = "拖动已关闭";
}
}
function $(id) {return document.getElementById(id);}
function getT(e){return e.target || e.srcElement;}
function getMouseX(e){
return e.pageX ? e.pageX : e.clientX + document.body.scrollLeft - document.body.clientLeft;
}
function getMouseY(e){
return e.pageY ? e.pageY : e.clientY + document.body.scrollTop; - document.body.clientTop;
}
function getRealLeft(o){
var l = 0;
while(o){
l += o.offsetLeft - o.scrollLeft;
o = o.offsetParent;
}
return(l);
}
function getRealTop(o){
var t = 0;
while(o){
t += o.offsetTop - o.scrollTop;
o = o.offsetParent;
}
return(t);
}
function cleanWhitespace(node) {
var notWhitespace = /S/;
for (var i=0; i < node.childNodes.length; i++) {
var childNode = node.childNodes[i];
if ((childNode.nodeType == 3)&&(!notWhitespace.test(childNode.nodeValue))) {
node.removeChild(node.childNodes[i]);
i--;
}
if (childNode.nodeType == 1) {
cleanWhitespace(childNode);
}
}
}//去除容器中的空白
</script>
</head>
<body onload="_dragFix.init('pm_main');">

<div id="pm_header"> </div>


<div id="pm_main">
<div id="main_left">
<div id="drag1" drag="yes" range="in">
<div class='system_header_bar' header='yes'>
<span>只能在此列拖动</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">

<div class="one"><span style='color:red'>只能在此列拖动</span></div>
</div>
</div>
<div id="drag2" drag="yes" range="out">
<div class='system_header_bar' header='yes'>
<span>可以任意拖动</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>
</div>
<div class="system_header_content">
<div class="one">
<span style='color:red'>可以任意拖动</span>
</div>
</div>
</div>
</div>
<div id="main_main">
<div id="drag3" drag="yes" range="out">
<div class='system_header_bar' header='yes'>
<span>标题</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">
<div class="one">内容</div>
</div>
</div>

<div id="drag4" drag="yes" range="in">
<div class='system_header_bar' header='yes'>
<span>freebirdy</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">
<div class="one">
<span>支持绝大多数浏览器！暂时没发现有不支持的浏览器，发现有的，请给我发个信息！<br>
QQ：447959415<br>
MSN:freebirdy0815@hotmail.com<br>
Blog:<a target="_blank" href="http://freebirdy.blog.sohu.com" rel="external">http://freebirdy.blog.sohu.com</a><br>
Email:freebird110@qq.com <a href="mailto:freebirdy0815@163.com">freebirdy0815@163.com</a></span>
</div>
</div>
</div>
<div id="drag5" drag="no" range="out">
<div class='system_header_bar' header='yes'>

<span>不能拖动</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">
<div class="one">
<span style="color:red">不能拖动</span>
</div>
</div>
</div>

</div>
<div id="main_right">
<div id="drag6" drag="yes" range="in">
<div class='system_header_bar' header='yes'>

<span>系统参数</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">
<span style='color:red'>只能在此列拖动</span>
</div>
</div>

<div id="drag7" drag="yes" range="out">
<div class='system_header_bar' header='yes'>
<span>搜索</span>
<a href="#" class="button_del" title="关闭" onclick="this.parentNode.parentNode.style.display='none'">X</a>

</div>
<div class="system_header_content">
<div class="one">
<span style='color:red'>可以任意拖动</span>
</div>
</div>
</div>
</div>
</div>

</body>
</html>

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