GOOGLE的个性化主页拖搁功能的实现方法

Category : 资源共享 / Tags : , / Date : 2006.07.26 / /

标题中所说的功能是用Jscript实现,不包含记忆功能,没有数据交换
此方法在firework中无效,待解决
其他效果Google的个性化主页如出一辙

转自:Syosyume's Blog
具体实现
CSS

<style>
.dragTable{

border-top:1px solid #3366cc;

margin-bottom: 10px;

width:100%;

background-color:#FFFFFF;

}

td{vertical-align:top; }

.dragTR{

cursor:move;

color:#7787cc;
text-decoration:underline;

background-color:#e5eef9;
padding:10px 0 10px 5px;

font-weight:bold;

}

#parentTable{

border-collapse:collapse;

letter-spacing:25px;

}

</style>

Jscript

<script defer language="jscript">

var Drag={dragged:false,

ao:null,

tdiv:null,

dragStart:function(){

Drag.ao=event.srcElement;

if((Drag.ao.tagName=="TD")||(Drag.ao.tagName=="TR")){

Drag.ao=Drag.ao.offsetParent;

Drag.ao.style.zIndex=100;

}else

return;

Drag.dragged=true;

Drag.tdiv=document.createElement("div");

Drag.tdiv.innerHTML=Drag.ao.outerHTML;

Drag.ao.style.border="1px dashed red";

Drag.tdiv.style.display="block";

Drag.tdiv.style.position="absolute";

Drag.tdiv.style.filter="alpha(opacity=70)";

Drag.tdiv.style.cursor="move";

Drag.tdiv.style.border="1px solid #000000";

Drag.tdiv.style.width=Drag.ao.offsetWidth;

Drag.tdiv.style.height=Drag.ao.offsetHeight;

Drag.tdiv.style.top=Drag.getInfo(Drag.ao).top;

Drag.tdiv.style.left=Drag.getInfo(Drag.ao).left;

document.body.appendChild(Drag.tdiv);

Drag.lastX=event.clientX;

Drag.lastY=event.clientY;

Drag.lastLeft=Drag.tdiv.style.left;

Drag.lastTop=Drag.tdiv.style.top;

},

draging:function(){//重要:判断MOUSE的位置

if(!Drag.dragged||Drag.ao==null)return;

var tX=event.clientX;

var tY=event.clientY;

Drag.tdiv.style.left=parseInt(Drag.lastLeft)+tX-Drag.lastX;

Drag.tdiv.style.top=parseInt(Drag.lastTop)+tY-Drag.lastY;

for(var i=0;i<parentTable.cells.length;i++){

var parentCell=Drag.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(Drag.ao);

}

break;

}

for(var j=0;j<subTables.length;j++){

var subTable=Drag.getInfo(subTables[j]);

if(tX>=subTable.left&&tX<=subTable.right&&tY>=subTable.top&&tY<=subTable.bottom){

parentTable.cells[i].insertBefore(Drag.ao,subTables[j]);

break;

}else{

parentTable.cells[i].appendChild(Drag.ao);

}

}

}

}

}

,

dragEnd:function(){

if(!Drag.dragged)return;

Drag.dragged=false;

Drag.mm=Drag.repos(150,15);

Drag.ao.style.borderWidth="0px";

Drag.ao.style.borderTop="1px solid #3366cc";

Drag.tdiv.style.borderWidth="0px";

Drag.ao.style.zIndex=1;

},

getInfo:function(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;

},

repos:function(aa,ab){

var f=Drag.tdiv.filters.alpha.opacity;

var tl=parseInt(Drag.getInfo(Drag.tdiv).left);

var tt=parseInt(Drag.getInfo(Drag.tdiv).top);

var kl=(tl-Drag.getInfo(Drag.ao).left)/ab;

var kt=(tt-Drag.getInfo(Drag.ao).top)/ab;

var kf=f/ab;

return setInterval(function(){if(ab<1){

clearInterval(Drag.mm);

Drag.tdiv.removeNode(true);

Drag.ao=null;

return;

}

ab–;

tl-=kl;

tt-=kt;

f-=kf;

Drag.tdiv.style.left=parseInt(tl)+"px";

Drag.tdiv.style.top=parseInt(tt)+"px";

Drag.tdiv.filters.alpha.opacity=f;

}

,aa/ab)

},

inint:function(){//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",Drag.dragStart);

}

}

document.onmousemove=Drag.draging;

document.onmouseup=Drag.dragEnd;

}

//end of Object Drag

}

Drag.inint();

function _show(str){

var w=window.open('','');

var d=w.document;

d.open();

str=str.replace(/=(?!")(.*?)(?!")( |>)/g,"=\"$1\"$2");

str=str.replace(/(<)(.*?)(>)/g,"<span style='color:red;'>&lt;$2&gt;</span><br />");

str=str.replace(/\r/g,"<br />\n");

d.write(str);

}

</script>



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