编程 Javascript

JS+CSS制作DIV层可(最小化/拖拽/排序)功能实现代码

Posted in Javascript onFebruary 25, 2013

<HTML> 
<HEAD> 
<TITLE>JS+CSS制作的DIV层最小化和随意拖拽排序功能</TITLE> 
<style type="text/css"> 
body 
{ 
margin:10px; 
} 
#dragHelper 
{ 
position:absolute;/*重要*/ 
border:2px dashed #000000; 
background-color:#FFFFFF; 
filter: alpha(opacity=30); 
} 
.normal 
{ 
position:absolute;/*重要*/ 
width:300px; 
#height:10px; 
border:1px solid #666666; 
background-color:#FFFFFF; 
} 
.over 
{ 
position:absolute;/*重要*/ 
width:300px; 
#height:10px; 
border:1px solid #666666; 
background-color:#f3f3f3; 
filter: alpha(opacity=50); 
} 
.dragArea { 
CURSOR: move; 
} 
</style> 
</HEAD> 
<BODY oncontextmenu="window.event.returnValue=false"> 
<div id="dragHelper" style="display:none"></div> 
<div class="normal" overClass="over" dragClass="normal"> 
<table width="100%"> 
<tbody> 
<tr bgcolor="#CCCCCC" bar="yes"><td>百度</td><td dragArea="yes" class="dragArea">点此拖动</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> 
<tr><td colspan="3">地址:http://www.baidu.com</td></tr> 
<tr><td colspan="3">关键字:</td></tr> 
<tr><td colspan="3">说明:</td></tr> 
</tbody> 
</table> 
</div> 
<div class="normal" overClass="over" dragClass="normal"> 
<table width="100%"> 
<tbody> 
<tr bgcolor="#CCCCCC" bar="yes"><td>新浪</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> 
<tr><td colspan="3">地址:http://www.sina.com.cn</td></tr> 
<tr><td colspan="3">关键字:</td></tr> 
<tr><td colspan="3">说明:</td></tr> 
</tbody> 
</table> 
</div> 
<div class="normal" overClass="over" dragClass="normal"> 
<table width="100%"> 
<tbody> 
<tr bgcolor="#CCCCCC" bar="yes"><td>网页特效</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> 
<tr><td colspan="3">地址：http://www.CsrCode.cn</td></tr> 
<tr><td colspan="3">关键字:</td></tr> 
<tr><td colspan="3">说明:</td></tr> 
</tbody> 
</table> 
</div> 
<div class="normal" overClass="over" dragClass="normal"> 
<table width="100%"> 
<tbody> 
<tr bgcolor="#CCCCCC" bar="yes"><td>七彩影视</td><td dragArea="yes" class="dragArea">........</td><td><a href="#" onclick="openClose(this)">-</a> x</td></tr> 
<tr><td colspan="3">地址：http://www.33567.cn</td></tr> 
<tr><td colspan="3">关键字:</td></tr> 
<tr><td colspan="3">说明:</td></tr> 
</tbody> 
</table> 
</div> 
</BODY> 
<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
var dragObjs = [];//可以拖拽的元素数组 
var dragObjTops = []; 
var dragHelper = document.getElementById("dragHelper");//拖拽时位置框 
var dragObj = null;//拖拽对象元素 
var dragObjPos = 0; 
var dragObjOffset = {left:0,top:0};//拖拽对象原始位置 
var mouseInDragObjOffset = {x:0,y:0};//鼠标在拖拽对象中的相对位置 
var initHeight = 40; 
Number.prototype.NaN0=function(){return isNaN(this)?0:this;} 
function getPosition(e){//获取元素相对文档的绝对位置 
var left = 0; 
var top = 0; 
while (e.offsetParent){ 
left += e.offsetLeft; 
top += e.offsetTop; 
e = e.offsetParent; 
} 
left += e.offsetLeft; 
top += e.offsetTop; 
return {x:left, y:top}; 
} 
function mouseCoords(ev){//获取鼠标相对文档的绝对位置 
if(ev.pageX || ev.pageY){ 
return {x:ev.pageX, y:ev.pageY}; 
} 
return { 
x:ev.clientX + document.body.scrollLeft - document.body.clientLeft, 
y:ev.clientY + document.body.scrollTop - document.body.clientTop 
}; 
} 
function getMouseOffset(target, ev){//获取鼠标相对元素的相对位置 
ev = ev || window.event; 
var elementPos = getPosition(target); 
var mousePos = mouseCoords(ev); 
return {x:mousePos.x - elementPos.x, y:mousePos.y - elementPos.y}; 
} 
function mouseDown(ev){ 
ev = ev || window.event; 
target = ev.srcElement || ev.target; 
if(dragObj){ 
return; 
} 
var dragArea = false; 
if(target.getAttribute("dragArea")){ 
dragArea = true; 
} 
while(!target.getAttribute("isDragObj")){ 
if(target.tagName=="HTML") 
break; 
target = target.parentNode; 
} 
if(dragArea && target.getAttribute("isDragObj")){ 
dragObj = target; 
//重写的目的是让当前对象在最上层 
document.body.removeChild(dragObj); 
document.body.appendChild(dragObj); 
//记录下拖拽对象原始位置 
dragObjOffset.left = dragObj.style.left; 
dragObjOffset.top = dragObj.style.top; 
dragObj.className = dragObj.getAttribute("overClass"); 
//鼠标在拖拽对象中的相对位置 
mouseInDragObjOffset = getMouseOffset(dragObj, ev); 
dragHelper.style.left = dragObj.style.left; 
dragHelper.style.top = dragObj.style.top; 
dragHelper.style.width = dragObj.offsetWidth; 
dragHelper.style.height = dragObj.offsetHeight; 
dragHelper.style.display = ""; 
//alert(dragObj.offsetWidth+":"+dragObj.clientWidth); 
} 
} 
function mouseUp(ev){ 
ev = ev || window.event; 
target = ev.srcElement || ev.target; 
if(dragObj){ 
dragObj.style.left = dragHelper.style.left; 
dragObj.style.top = dragHelper.style.top; 
dragHelper.style.display = "none"; 
dragObj.className = dragObj.getAttribute("dragClass"); 
dragObj = null; 
} 
} 
function mouseMove(ev){ 
ev = ev || window.event; 
if(dragObj) { 
var mousePos = mouseCoords(ev); 
/*dragHelper.style.left = dragObjOffset.left; 
dragHelper.style.top = dragObjOffset.top; 
dragHelper.style.width = dragObj.offsetWidth; 
dragHelper.style.height = dragObj.offsetHeight; 
dragHelper.style.display = "";*/ 
var windowWidth = document.body.offsetWidth;//窗口宽度 
var windowHeight = document.body.offsetHeight;//窗口高度 
//拖拽对象应该所在当前位置 
var dragObjLeft = mousePos.x - mouseInDragObjOffset.x; 
var dragObjTop = mousePos.y - mouseInDragObjOffset.y; 
//增加判断，不然拖拽对象拖出浏览器窗口 
if(dragObjLeft >= 0 && dragObjLeft <= windowWidth - dragObj.offsetWidth - 20) 
dragObj.style.left = dragObjLeft; 
if(dragObjTop >=0) 
dragObj.style.top = dragObjTop; 
repaint(); 
} 
} 
//克隆对象 
function cloneObject(srcObj, destObj){ 
destObj = srcObj.cloneNode(true); 
} 
function makeDraggable(element){ 
element.setAttribute("isDragObj", "y"); 
} 
function repaint(){ 
for(i=0; i<dragObjs.length; i++){ 
if(dragObjs[i] == dragObj){ 
dragObjPos = i; 
dragObjs[i] = dragHelper; 
break; 
} 
} 
if(dragObjPos>0 && parseInt(dragObj.style.top)<parseInt(dragObjs[dragObjPos-1].style.top)){ 
dragObjs[dragObjPos] = dragObjs[dragObjPos-1]; 
dragObjs[dragObjPos-1] = dragHelper; 
dragObjPos = dragObjPos - 1; 
} 
if(dragObjPos<dragObjs.length-1 && parseInt(dragObj.style.top)>parseInt(dragObjs[dragObjPos+1].style.top)){ 
dragObjs[dragObjPos] = dragObjs[dragObjPos+1]; 
dragObjs[dragObjPos+1] = dragHelper; 
dragObjPos = dragObjPos + 1; 
} 
paintDragObjs(); 
dragObjs[dragObjPos] = dragObj; 
} 
function paintDragObjs(){ 
var h = 40; 
for(i=0; i<dragObjs.length; i++){ 
dragObjs[i].style.left = 20; 
dragObjs[i].style.top = h; 
h += dragObjs[i].offsetHeight + 10; 
} 
} 
function openClose(obj){ 
obj.innerHTML = obj.innerHTML=="-"?"+":"-"; 
while(obj.tagName != "TBODY"){ 
obj = obj.parentNode; 
} 
for(i=0; i<obj.childNodes.length; i++){ 
if(obj.childNodes[i].nodeName == "#text" 
|| obj.childNodes[i].getAttribute("bar")){ continue; } 
obj.childNodes[i].style.display=obj.childNodes[i].style.display==""?"none":""; 
} 
paintDragObjs(); 
} 
document.onmousedown = mouseDown; 
document.onmouseup = mouseUp; 
document.onmousemove = mouseMove; 
window.onload = function(){ 
var objs = document.getElementsByTagName("Div"); 
for(i=0; i<objs.length; i++){ 
var item = objs.item(i); 
//if(i==1)item.style.height=150; 
if(item.getAttribute("overClass")){ 
makeDraggable(item); 
dragObjs.push(item); 
item.style.left = 20; 
item.style.top = initHeight; 
dragObjTops.push(initHeight); 
initHeight += item.offsetHeight + 10; 
} 
} 
// dragHelper = document.createElement('DIV'); 
// dragHelper.style.cssText = 'position:absolute;display:none;'; 
// document.body.appendChild(dragHelper); 
} 
//--> 
</SCRIPT> 
</HTML>

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