<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>拖拽Demo</title>
<style type="text/CSS">
body
{
margin:0px;
}
#aim
{
position:absolute;
width:200px;
height:30px;
border:1px solid #666666;
background-color:#FFCCCC;
}
#sourceLayer, #cloneLayer
{
position:absolute;
width:300px;
height:50px;
border:1px solid #666666;
background-color:#CCCCCC;
cursor:move;
}
.docked
{
display:none;
filter:alpha(opacity=100);
}
.actived
{
display:block;
filter:alpha(opacity=70);
}
</style>
</head>
<body >
<div id="aim">locate</div>
<div id="sourceLayer" unselectable="off"><img src="http://www.baidu.com/img/logo.gif" alt="Drag Demo">Source of the demo</div>
<div id="cloneLayer" class="docked" unselectable="off"></div>
<script type="text/javascript" language="javascript">
var aim;
var sourceLayer;
var cloneLayer;
var aimX;
var aimY;
var orgnX;
var orgnY;
var draging = false;
var offsetX = 0;
var offsetY = 0;
var back;
var thisX ;
var thisY ;
var time ;
var stepX ;
var stepY ;
function getLayer(inAim,inSource,inClone)
{
aim = document.getElementById(inAim);
sourceLayer = document.getElementById(inSource);
cloneLayer = document.getElementById(inClone);
}
function initDrag(initAimX,initAimY,initOrgnX,initOrgnY)
{
aimX = initAimX;
aimY = initAimY;
orgnX = initOrgnX;
orgnY = initOrgnY;
aim.style.pixelLeft = aimX;
aim.style.pixelTop = aimY;
sourceLayer.style.pixelLeft = orgnX;
sourceLayer.style.pixelTop = orgnY;
cloneLayer.style.pixelLeft = orgnX;
cloneLayer.style.pixelTop = orgnY;
}
function BeforeDrag()
{
if (event.button != 1)
{
return;
}
cloneLayer.innerHTML = sourceLayer.innerHTML; 容
offsetX = document.body.scrollLeft + event.clientX - sourceLayer.style.pixelLeft;
offsetY = document.body.scrollTop + event.clientY - sourceLayer.style.pixelTop;
cloneLayer.className = "actived";
draging = true;
}
function OnDrag()
{
if(!draging)
{
return;
}
event.returnValue = false;
cloneLayer.style.pixelLeft = document.body.scrollLeft + event.clientX - offsetX;
cloneLayer.style.pixelTop = document.body.scrollTop + event.clientY - offsetY;
}
function EndDrag()
{
if (event.button != 1)
{
return;
}
draging = false;
if (event.clientX >= aim.style.pixelLeft && event.clientX <= (aim.style.pixelLeft + aim.offsetWidth) &&
event.clientY >= aim.style.pixelTop && event.clientY <= (aim.style.pixelTop + aim.offsetHeight))
{
sourceLayer.style.pixelLeft = aim.style.pixelLeft;
sourceLayer.style.pixelTop = aim.style.pixelTop;
cloneLayer.className = "docked";
}
else
{
thisX = cloneLayer.style.pixelLeft;
thisY = cloneLayer.style.pixelTop;
offSetX = Math.abs(thisX - orgnX);
offSetY = Math.abs(thisY - orgnY);
time = 500;
stepX = Math.floor((offSetX/time)*20);
stepY = Math.floor((offSetY/time)*20);
if(stepX == 0)
stepX = 2;
if(stepY == 0)
stepY = 2;
moveStart();
}
}
function moveStart()
{
back = setInterval("MoveLayer();",15);
}
function MoveLayer()
{
if(cloneLayer.style.pixelLeft <= orgnX && cloneLayer.style.pixelTop <= orgnY)
{
cloneLayer.style.pixelLeft += stepX;
cloneLayer.style.pixelTop += stepY;
if(cloneLayer.style.pixelLeft > orgnX)
{
stepX = 1;
}
if(cloneLayer.style.pixelTop > orgnY)
{
stepY = 1;
}
//if the coordinate of X Y are same
if(cloneLayer.style.pixelLeft == orgnX)
{
stepX = 0;
}
if(cloneLayer.style.pixelTop == orgnY)
{
stepY = 0;
}
if(cloneLayer.style.pixelLeft == orgnX && cloneLayer.style.pixelTop == orgnY)
{
EndMove();
}
}
//locate to the downleft of the object
else if(cloneLayer.style.pixelLeft <= orgnX && cloneLayer.style.pixelTop >= orgnY)
{
cloneLayer.style.pixelLeft += stepX;
cloneLayer.style.pixelTop -= stepY;
if(cloneLayer.style.pixelLeft > orgnX)
{
stepX = 1;
}
if(cloneLayer.style.pixelTop < orgnY)
{
stepY = 1;
}
if(cloneLayer.style.pixelLeft == orgnX)
{
stepX = 0;
}
if(cloneLayer.style.pixelTop == orgnY)
{
stepY = 0;
}
if(cloneLayer.style.pixelLeft == orgnX && cloneLayer.style.pixelTop == orgnY)
{
EndMove();
}
}
else if(cloneLayer.style.pixelLeft >= orgnX && cloneLayer.style.pixelTop <= orgnY)
{
cloneLayer.style.pixelLeft -= stepX;
cloneLayer.style.pixelTop += stepY;
if(cloneLayer.style.pixelLeft < orgnX)
{
stepX = 1;
}
if(cloneLayer.style.pixelTop > orgnY)
{
stepY = 1;
}
if(cloneLayer.style.pixelLeft == orgnX)
{
stepX = 0;
}
if(cloneLayer.style.pixelTop == orgnY)
{
stepY = 0;
}
if(cloneLayer.style.pixelLeft == orgnX && cloneLayer.style.pixelTop == orgnY)
{
EndMove();
}
}
//locate to the right of the object
else if(cloneLayer.style.pixelLeft >= orgnX && cloneLayer.style.pixelTop >= orgnY)
{
cloneLayer.style.pixelLeft -= stepX;
cloneLayer.style.pixelTop -= stepY;
if(cloneLayer.style.pixelLeft < orgnX)
{
stepX = 1;
}
if(cloneLayer.style.pixelTop < orgnY)
{
stepY = 1;
}
if(cloneLayer.style.pixelLeft == orgnX)
{
stepX = 0;
}
if(cloneLayer.style.pixelTop == orgnY)
{
stepY = 0;
}
if(cloneLayer.style.pixelLeft == orgnX && cloneLayer.style.pixelTop == orgnY)
{
EndMove();
}
}
//to the design
else
{
EndMove();
}
}
//stop and then back to the state ()carton
function EndMove()
{
sourceLayer.style.pixelLeft = orgnX;
sourceLayer.style.pixelTop = orgnY;
cloneLayer.style.pixelLeft = orgnX;
cloneLayer.style.pixelTop = orgnY;
cloneLayer.className = "docked";
clearInterval(back);
}
//Main function of this demo
function startDraging(inAim,inSource,inClone,initAimX,initAimY,initOrgnX,initOrgnY)
{
getLayer(inAim,inSource,inClone)
initDrag(initAimX,initAimY,initOrgnX,initOrgnY);
sourceLayer.onmousedown = BeforeDrag;
document.onmousemove = OnDrag; //if we use cloneLayer,then the content will be draged ,and well a bug
cloneLayer.onmouseup = EndDrag;
}
//transfer
startDraging("aim","sourceLayer","cloneLayer",600,500,50,50);
//-->
</script>
</body>
</html>
posted on 2007-01-29 14:42
wqwqwqwqwq 閱讀(634)
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