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JavaScript实现AJAX的拖动效果

日期:2006-09-12 14:37:52 点击: 来自: 作者:

JavaScript实现AJAX的拖动效果

例子一
[html]

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>drag layer</title>
<style>
body,table{color:#000000;
    font-size:12px;
}
div.div_one{}
.dragBar{color:#FFFFFF;
    font-weight:bold}
</style>
<script language="javascript" defer>
/*written by joelee@51js
*/
    var tmpElement=null;
    var dragElement=null;
    var downX,downY,tmp_o_x,tmp_o_y;
    var refElement=null;
    var dragActive=0;
    var draging=0;
function readyDrag(){
    dragActive=1;
    if(event.srcElement.tagName!="DIV")
        return;
    dragElement=event.srcElement.parentNode;
    tmpElement=dragElement.cloneNode(true);
    tmpElement.style.filter="alpha(opacity=90)";
    tmpElement.style.zIndex=2;
    dragElement.style.zIndex=1;
    tmpElement.style.position="absolute";
    if(dragElement.parentNode.tagName!="BODY"){
        dragElement.style.left=dragElement.offsetLeft+dragElement.parentNode.style.pixelLeft;
        dragElement.style.top=dragElement.offsetTop+dragElement.parentNode.style.pixelTop;
    }
    downX=event.clientX;
    downY=event.clientY;
    tmp_o_x=dragElement.style.pixelLeft;
    tmp_o_y=dragElement.style.pixelTop;
    tmpElement.style.visibility="hidden";
    document.body.appendChild(tmpElement);
    document.onmousemove=startDrag;
    }
    document.onmouseup=endDrag;
function startDrag(){
    if(dragActive==1&&event.button==1&&dragElement!=null&&tmpElement!=null){
        tmpElement.style.visibility="visible";
        tmpElement.style.left=tmp_o_x+event.clientX-downX;
        tmpElement.style.top=tmp_o_y+event.clientY-downY;
        dragElement.style.backgroundColor="#CCCCCC";
        document.body.style.cursor="move";
        draging=1;
    }
}
function endDrag(){
    if(dragActive==1&&tmpElement!=null){
        if(draging==1){
            dragElement.removeNode(true);
            draging=0;
        }
        tmpElement.style.filter="alpha(opacity=100)";
        tmpElement.style.zIndex=1;
        document.body.style.cursor="default";
        if(refElement!=null&&refElement.parentNode!=null&&refElement.parentNode.tagName!="BODY"){
            tmpElement.style.width=refElement.parentNode.style.width;
            tmpElement.style.position="";
            refElement.parentNode.insertBefore(tmpElement,refElement);
        }
    }
    dragElement=null;
    tmpElement=null;
    dragActive=0;
}
function readyInsert(){
    if(dragActive==1){
        var element=event.srcElement;
        if(element==dragElement)return;
        if(element.tagName!="DIV")
            return;
        if(element.className=="dragBar"||element.className=="textSheet"||element.className=="blankBar")
            element=element.parentNode;
        element.style.backgroundColor="#CCCCCC";
        element.style.filter="alpha(opacity=50)";
        refElement=element;
    }
}
function failInsert(){
    var element=event.srcElement;
    if(element.tagName!="DIV")
        return;
    try{
        if(element.className=="dragBar"||element.className=="textSheet"||element.className=="blankBar")
            element=element.parentNode;
    }catch(e){}
    element.style.filter="alpha(opacity=100)";
    element.style.backgroundColor="#FFFFFF";
    refElement=null;
}
document.onselectstart=function(){return false}
</script>
</head>

<body>
<div id="div_one" class="div_one" style="position:absolute; left:116px; top:137px; width:433px; z-index:1; background-color: #FFFFFF; layer-background-color: #FFFFFF;" onMouseOver="readyInsert()" onMouseOut="failInsert()">
  <div onMouseDown="readyDrag()" style="cursor:move; border:1px solid #996666; background-color:#996666; height:20px" name="dragDIV" class="dragBar"><img src="snap_icon.gif" width="16" height="16">Window</div>
<div class="textSheet" style="border:1px solid #996666;">Content<br>
  Content<br>
  Content<br>
  Content  <br>
</div>
<div class="blankBar" style="height:10px"></div></div>
<div id="grid1" style="position:absolute; left:534px; top:37px; width:336px; height:15px; z-index: 100; visibility: visible;">
  <div style="height:20px;z-index:2;" onMouseOver="readyInsert()" onMouseOut="failInsert();">把层拖动到这儿</div>
</div>
<div id="grid2" style="position:absolute; left:20px; top:40px; width:494px; height:15px; z-index: 100; visibility: visible;">
  <div style="height:20px;z-index:2; background-image:url()" onMouseOver="readyInsert()" onMouseOut="failInsert();">把层拖动到这儿</div>
</div>
<div id="div_one" class="div_one" style="position:absolute; left:204px; top:277px; width:433px; z-index:1; background-color: #FFFFFF; layer-background-color: #FFFFFF;" onMouseOver="readyInsert()" onMouseOut="failInsert()">
  <div onMouseDown="readyDrag()" style="cursor:move; border:1px solid #996666; background-color:#996666; height:20px" name="dragDIV" class="dragBar"><img src="snap_icon.gif" width="16" height="16">BBS</div>
  <div class="textSheet" style="border:1px solid #996666;">Content</div>
  <div class="blankBar" style="height:10px"></div>
</div>
<div id="div_one" class="div_one" style="position:absolute; left:561px; top:195px; width:433px; z-index:1; background-color: #FFFFFF; layer-background-color: #FFFFFF;" onMouseOver="readyInsert()" onMouseOut="failInsert()">
  <div onMouseDown="readyDrag()" style="cursor:move; border:1px solid #996666; background-color:#996666; height:20px" name="dragDIV" class="dragBar"><img src="snap_icon.gif" width="16" height="16">Log</div>
  <div class="textSheet" style="border:1px solid #996666;">Content<br>
    Content<br>
    Content    <br>
  Content<br>
</div>
  <div class="blankBar" style="height:10px"></div>
</div>
<div id="div_one" class="div_one" style="position:absolute; left:438px; top:74px; width:433px; z-index:1; background-color: #FFFFFF; layer-background-color: #FFFFFF;" onMouseOver="readyInsert()" onMouseOut="failInsert()">
  <div onMouseDown="readyDrag()" style="cursor:move; border:1px solid #996666; background-color:#996666; height:20px" name="dragDIV" class="dragBar"><img src="snap_icon.gif" width="16" height="16">Worker</div>
  <div class="textSheet" style="border:1px solid #996666;">Content</div>
  <div class="blankBar" style="height:10px"></div>
</div>
<div id="div_one" class="div_one" style="position:absolute; left:206px; top:406px; width:433px; z-index:1; background-color: #FFFFFF; layer-background-color: #FFFFFF;" onMouseOver="readyInsert()" onMouseOut="failInsert()">
  <div onMouseDown="readyDrag()" style="cursor:move; border:1px solid #996666; background-color:#996666; height:20px" name="dragDIV" class="dragBar"><img src="snap_icon.gif" width="16" height="16">Tools</div>
  <div class="textSheet" style="border:1px solid #996666;">Content</div>
  <div class="blankBar" style="height:10px"></div>
</div>
</body>
</html>
[/html]

例子二

[html]
<html>
<head>
<title>DRAG the DIV</title>
<style>
*{font-size:12px}
.dragTable{
    font-size:12px;
    border-top:1px solid #3366cc;
    margin-bottom: 10px;
    width:100%;
    background-color:#FFFFFF;
}
.dragTR{
    cursor:move;
    color:#7787cc;
    background-color:#e5eef9;
}
td{vertical-align:top;}
#parentTable{
    border-collapse:collapse;
    letter-spacing:25px;
}
</style>
<script defer>
/****JoeLee************E-MAIL:hktx@163.com****QQ:48293707*****11:09 2006-2-9******/
    var draged=false;
    tdiv=null;
function dragStart(){
    ao=event.srcElement;
    if((ao.tagName=="TD")||(ao.tagName=="TR"))ao=ao.offsetParent;
    else return;
    draged=true;
    tdiv=document.createElement("div");
    tdiv.innerHTML=ao.outerHTML;
    tdiv.style.display="block";
    tdiv.style.position="absolute";
    tdiv.style.filter="alpha(opacity=70)";
    tdiv.style.cursor="move";
    tdiv.style.width=ao.offsetWidth;
    tdiv.style.height=ao.offsetHeight;
    tdiv.style.top=getInfo(ao).top;
    tdiv.style.left=getInfo(ao).left;
    document.body.appendChild(tdiv);
    lastX=event.clientX;
    lastY=event.clientY;
    lastLeft=tdiv.style.left;
    lastTop=tdiv.style.top;
    try{
        ao.dragDrop();   
    }catch(e){}
}
function draging(){//重要:判断MOUSE的位置
    if(!draged)return;
    var tX=event.clientX;
    var tY=event.clientY;
    tdiv.style.left=parseInt(lastLeft)+tX-lastX;
    tdiv.style.top=parseInt(lastTop)+tY-lastY;
    for(var i=0;i<parentTable.cells.length;i++){
        var parentCell=getInfo(parentTable.cells[i]);
        if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
            var subTables=parentTable.cells[i].getElementsByTagName("table");
            if(subTables.length==0){
                if(tX>=parentCell.left&&tX<=parentCell.right&&tY>=parentCell.top&&tY<=parentCell.bottom){
                    parentTable.cells[i].appendChild(ao);
                }
                break;
            }
            for(var j=0;j<subTables.length;j++){
                var subTable=getInfo(subTables[j]);
                if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){
                    parentTable.cells[i].insertBefore(ao,subTables[j]);
                    break;
                }else{
                    parentTable.cells[i].appendChild(ao);
                }   
            }
        }
    }
}

function dragEnd(){
    if(!draged)return;
    draged=false;
    mm=ff(150,15);
}
function getInfo(o){//取得坐标
    var to=new Object();
    to.left=to.right=to.top=to.bottom=0;
    var twidth=o.offsetWidth;
    var theight=o.offsetHeight;
    while(o!=document.body){
        to.left+=o.offsetLeft;
        to.top+=o.offsetTop;
        o=o.offsetParent;
    }
        to.right=to.left+twidth;
        to.bottom=to.top+theight;
    return to;
}
function ff(aa,ab){//从GOOGLE网站来,用于恢复位置
    var ac=parseInt(getInfo(tdiv).left);
    var ad=parseInt(getInfo(tdiv).top);
    var ae=(ac-getInfo(ao).left)/ab;
    var af=(ad-getInfo(ao).top)/ab;
    return setInterval(function(){if(ab<1){
                            clearInterval(mm);
                            tdiv.removeNode(true);
                            ao=null;
                            return
                        }
                    ab--;
                    ac-=ae;
                    ad-=af;
                    tdiv.style.left=parseInt(ac)+"px";
                    tdiv.style.top=parseInt(ad)+"px"
                }
,aa/ab)
}
function inint(){//初始化
    for(var i=0;i<parentTable.cells.length;i++){
        var subTables=parentTable.cells[i].getElementsByTagName("table");
        for(var j=0;j<subTables.length;j++){
            if(subTables[j].className!="dragTable")break;
            subTables[j].rows[0].className="dragTR";
            subTables[j].rows[0].attachEvent("onmousedown",dragStart);
            subTables[j].attachEvent("ondrag",draging);
            subTables[j].attachEvent("ondragend",dragEnd);
        }
    }
}
inint();
</script>
</head>
<body>
<table border="0" cellpadding="0" cellspacing="10" width="100%" height=500 id="parentTable">
<tr >
    <td width="25%" valgin="top">
        <table border=0 class="dragTable" cellspacing="0">
            <tr>
                <td><b>GMAIL</b></td>
            </tr>
            <tr>
                <td>暂时无法显示GMAIL内容</td>
            <tr>
        </table><table border=0 class="dragTable" cellspacing="0">
            <tr>
                <td>新浪体育</td>
            </tr>
            <tr>
                <td>解剖威队独门利器FW28 2万转引擎匹配超级变速器颁奖:辛吉斯欣喜能以冠军起步 印度搭档创下纪录法新社前瞻冬奥短道速滑:中韩唱主角 美加施冷箭</td>
            <tr>
        </table><table border=0 class="dragTable" cellspacing="0">
            <tr>
                <td>焦点</td>
            </tr>
            <tr>
                <td>京广线中断4小时20临客返汉晚点
中国新闻网-湖北分社 - 所有 235 相关报道 »哈马斯已有总理人选
解放日报报业集团 - 所有 489 相关报道 »陈水扁是两岸关系麻烦制造者
武汉晨报 - 所有 179 相关报道 »</td>
            <tr>
        </table>
    </td>
    <td width="25%">
        <table border=0 class="dragTable" cellspacing="0">
            <tr>
                <td>中关村在线</td>
            </tr>
            <tr>
                <td>新年行情速递 双敏板卡低价推荐 终于等到了,映泰6600GT一降降一百 罗技G15游戏键盘热力促销,代购价仅529元 </td>
            <tr>
        </table></td>
    <td width="25%">
        <table border=0 class="dragTable" cellspacing="0">
            <tr>
                <td>网易商业</td>
            </tr>
            <tr>
                <td>上海GDP增幅去年出现回落应对反倾销 中国鞋企联手对抗欧盟尹家绪操盘南方汽车 长安谋求曲线整体境外上市</td>
            <tr>
        </table>
    </td>
</tr>
</table>
</body>
</html>

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