JavaScript鼠标拖动div且可调整div大小
http://www.softwhy.com/article-5502-1.html
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>蚂蚁部落</title>
<style>
*{
margin:0;
padding:0;
}
#zhezhao{
width:100%;
height:100%;
background:#f00;
filter:alpha(opacity:0);
opacity:0;
z-index:9999;
position:absolute;
top:0;
left:0;
display:none;
}
#div2{
width:200px;
height:200px;
position:relative;
background:#EEEEEE;
border:1px solid #f00;
}
#div1{
width:15px;
height:15px;
background:#99CC00;
position:absolute;
right:0px;
bottom:0px;
cursor:nw-resize;
overflow:hidden;
font-size:12px;
text-align:center;
line-height:15px;
color:#FFFFFF;
float:right;
z-index:3;
}
#right{
width:15px;
height:100%;
background:#f00;
float:right;
position:absolute;
right:0;
top:0;
cursor:e-resize;
overflow:hidden;
filter:alpha(opacity:0);
opacity:0;
z-index:1;
}
#bottom{
width:100%;
height:15px;
background:#f00;
position:absolute;
left:0;
bottom:0;
cursor:n-resize;
overflow:hidden;
filter:alpha(opacity:0);
opacity:0;
z-index:1;
}
#div2 p{
padding:10px;
line-height:24px;
font-size:13px;
text-indent:24px;
color:#996600;
}
#div2 h2{
width:100%;
height:25px;
line-height:25px;
font-size:14px;
background:#CC9900;
color:#FFFFFF;
text-indent:15px;
cursor:move;
overflow:hidden;
}
</style>
<script type="text/javascript">
window.onload=function(){
var oDiv=document.getElementById("div1");
var oDiv2=document.getElementById("div2");
var zhezhao=document.getElementById("zhezhao");
var h2=oDiv2.getElementsByTagName("h2")[0];
var right=document.getElementById("right");
var bottom=document.getElementById("bottom");
var mouseStart={};
var divStart={};
var rightStart={};
var bottomStart={};
//往右拽
right.onmousedown=function(ev){
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
rightStart.x=right.offsetLeft;
if(right.setCapture){
right.onmousemove=doDrag1;
right.onmouseup=stopDrag1;
right.setCapture();
}
else{
document.addEventListener("mousemove",doDrag1,true);
document.addEventListener("mouseup",stopDrag1,true);
}
};
function doDrag1(ev){
var oEvent=ev||event;
var l=oEvent.clientX-mouseStart.x+rightStart.x;
var w=l+oDiv.offsetWidth;
if(w<oDiv.offsetWidth){
w=oDiv.offsetWidth;
}
else if(w>document.documentElement.clientWidth-oDiv2.offsetLeft){
w=document.documentElement.clientWidth-oDiv2.offsetLeft-2;
}
oDiv2.style.width=w+"px";
};
function stopDrag1(){
if(right.releaseCapture){
right.onmousemove=null;
right.onmouseup=null;
right.releaseCapture();
}
else{
document.removeEventListener("mousemove",doDrag1,true);
document.removeEventListener("mouseup",stopDrag1,true);
}
};
//往下拽
bottom.onmousedown=function(ev){
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
bottomStart.y=bottom.offsetTop;
if(bottom.setCapture){
bottom.onmousemove=doDrag2;
bottom.onmouseup=stopDrag2;
bottom.setCapture();
}
else{
document.addEventListener("mousemove",doDrag2,true);
document.addEventListener("mouseup",stopDrag2,true);
}
};
function doDrag2(ev){
var oEvent=ev||event;
var t=oEvent.clientY-mouseStart.y+bottomStart.y;
var h=t+oDiv.offsetHeight;
if(h<oDiv.offsetHeight){
h=oDiv.offsetHeight;
}
else if(h>document.documentElement.clientHeight-oDiv2.offsetTop){
h=document.documentElement.clientHeight-oDiv2.offsetTop-2;
}
oDiv2.style.height=h+"px";
};
function stopDrag2(){
if(bottom.releaseCapture){
bottom.onmousemove=null;
bottom.onmouseup=null;
bottom.releaseCapture();
}
else{
document.removeEventListener("mousemove",doDrag2,true);
document.removeEventListener("mouseup",stopDrag2,true);
}
};
//往左右同时拽
oDiv.onmousedown=function(ev){
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
divStart.x=oDiv.offsetLeft;
divStart.y=oDiv.offsetTop;
if(oDiv.setCapture){
oDiv.onmousemove=doDrag;
oDiv.onmouseup=stopDrag;
oDiv.setCapture();
}
else{
document.addEventListener("mousemove",doDrag,true);
document.addEventListener("mouseup",stopDrag,true);
}
zhezhao.style.display='block';
};
function doDrag(ev){
var oEvent=ev||event;
var l=oEvent.clientX-mouseStart.x+divStart.x;
var t=oEvent.clientY-mouseStart.y+divStart.y;
var w=l+oDiv.offsetWidth;
var h=t+oDiv.offsetHeight;
if(w<oDiv.offsetWidth){
w=oDiv.offsetWidth;
}
else if(w>document.documentElement.clientWidth-oDiv2.offsetLeft){
w=document.documentElement.clientWidth-oDiv2.offsetLeft-2;
}
if(h<oDiv.offsetHeight){
h=oDiv.offsetHeight;
}
else if(h>document.documentElement.clientHeight-oDiv2.offsetTop){
h=document.documentElement.clientHeight-oDiv2.offsetTop-2;
}
oDiv2.style.width=w+"px";
oDiv2.style.height=h+"px";
};
function stopDrag(){
if(oDiv.releaseCapture){
oDiv.onmousemove=null;
oDiv.onmouseup=null;
oDiv.releaseCapture();
}
else{
document.removeEventListener("mousemove",doDrag,true);
document.removeEventListener("mouseup",stopDrag,true);
}
zhezhao.style.display='none';
};
//h2完美拖拽
h2.onmousedown=function(ev){
var oEvent=ev||event;
mouseStart.x=oEvent.clientX;
mouseStart.y=oEvent.clientY;
divStart.x=oDiv2.offsetLeft;
divStart.y=oDiv2.offsetTop;
if(h2.setCapture){
h2.onmousemove=doDrag3;
h2.onmouseup=stopDrag3;
h2.setCapture();
}
else{
document.addEventListener("mousemove",doDrag3,true);
document.addEventListener("mouseup",stopDrag3,true);
}
zhezhao.style.display='block';
};
function doDrag3(ev){
var oEvent=ev||event;
var l=oEvent.clientX-mouseStart.x+divStart.x;
var t=oEvent.clientY-mouseStart.y+divStart.y;
if(l<0){
l=0;
}
else if(l>document.documentElement.clientWidth-oDiv2.offsetWidth){
l=document.documentElement.clientWidth-oDiv2.offsetWidth;
}
if(t<0){
t=0;
}
else if(t>document.documentElement.clientHeight-oDiv2.offsetHeight){
t=document.documentElement.clientHeight-oDiv2.offsetHeight;
}
oDiv2.style.left=l+"px";
oDiv2.style.top=t+"px";
};
function stopDrag3(){
if(h2.releaseCapture){
h2.onmousemove=null;
h2.onmouseup=null;
h2.releaseCapture();
}
else{
document.removeEventListener("mousemove",doDrag3,true);
document.removeEventListener("mouseup",stopDrag3,true);
}
zhezhao.style.display='none';
}
};
</script>
</head>
<body>
<div id="div2">
<div style="width:100%;height:100%;overflow:hidden;">
<h2>蚂蚁部落</h2>
<p>蚂蚁部落欢迎您，只有努力奋斗才会有美好的未来</p>
<div id="right"></div>
<div id="div1">拖</div>
<div id="bottom"></div>
</div>
</div>
<div id="zhezhao"></div>
</body>
</html>
