javascript 菜菜鸟求教： javascript 拖动改变单元格大小

楼主说的是控件那样可以随意拉伸？感觉web实现起来比较困难，关注一下~~~

解决方案 »

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lz属于会滥用js的那种类型~而且掌控不好~~浪费时间浪费力气~~
这个是原先写的鼠标效果。。如果要修改成LZ想要的效果只需要修改下即可麻烦LZ自己改下好了。。偶要做东西的说。。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>鼠标特效</title>
<script type="text/javascript">
var Class = {
//创建类
create : function () {
return function () {
this.initialize.apply(this, arguments);
};
}
};var $A = function (a) {
//转换数组
return a ? Array.apply(null, a) : new Array;
};Object.extend = function (a, b) {
//追加方法
for (var i in b) a[i] = b[i];
return a;
};Object.extend(Object, { addEvent : function (a, b, c, d) {
//添加函数
if (a.attachEvent) a.attachEvent(b[0], c);
else a.addEventListener(b[1] || b[0].replace(/^on/, ""), c, d || false);
return c;
},

delEvent : function (a, b, c, d) {
if (a.detachEvent) a.detachEvent(b[0], c);
else a.removeEventListener(b[1] || b[0].replace(/^on/, ""), c, d || false);
return c;
},

reEvent : function () {
//获取Event
return window.event ? window.event : (function (o) {
do {
o = o.caller;
} while (o && !/^\[object[ A-Za-z]*Event\]$/.test(o.arguments[0]));
return o.arguments[0];
})(this.reEvent);
}

});Function.prototype.bind = function () {
//绑定事件
var wc = this, a = $A(arguments), o = a.shift();
return function () {
wc.apply(o, a.concat($A(arguments)));
};
};var CMouse = Class.create();CMouse.prototype = {

initialize : function (obj) {
//初始化参数
var wc = this;
wc.div = wc.init_div();
wc.click = null; //鼠标按下后记录其坐标
wc.sFunc = Object.addEvent(document, ["onmousedown"], wc.sMove.bind(wc));
wc.iFunc = wc.eFunc = wc.dFunc = null;
},

init_div : function () {
//创建DIV，修改样式，并返回
var div = document.createElement("div");

with (div.style) {
position = "absolute";
zIndex = 100;
overflow = "hidden";
display = "none";
width = height = top = left = "0px";
border = "#CCCCCC 1px solid";
backgroundColor = "#F4F4F4";
filter = "alpha(opcaity=50)";
opacity = "0.5";
}

div.innerHTML = " ";
return document.body.appendChild(div);
},

reMouse : function () {
//获取鼠标位置
var e = Object.reEvent();
return {
x : document.documentElement.scrollLeft + e.clientX,
y : document.documentElement.scrollTop + e.clientY
};
},

eDiv : function (pos) {
//处理DIV
var wc = this, div = wc.div;

with(div.style) {
left = pos.left + "px";
top = pos.top + "px";
width = pos.width + "px";
height = pos.height + "px";
}
},

sMove : function () {
//鼠标按下后
var wc = this;

wc.click = wc.reMouse();

if (wc.iFunc) return true;

with (wc.div.style) {
display = "block";
width = height = "0px";
}

wc.iFunc = Object.addEvent(document, ["onmousemove"], wc.iMove.bind(wc));
wc.eFunc = Object.addEvent(document, ["onmouseup"], wc.eMove.bind(wc));
wc.dFunc = document.onselectstart;
document.onselectstart = new Function("return false");
},

iMove : function () {
//鼠标移动时
var wc = this, oms = wc.click, mos = wc.reMouse()

wc.eDiv({
left : Math.min(mos.x, oms.x), top : Math.min(mos.y, oms.y),
width : Math.abs(mos.x - oms.x), height : Math.abs(mos.y - oms.y)
});
},

eMove : function () {
//鼠标松开后
var wc = this; wc.div.style.display = "none";

Object.delEvent(document, ["onmousemove"], wc.iFunc);
Object.delEvent(document, ["onmouseup"], wc.eFunc);
wc.click = wc.iFunc = wc.eFunc = null;

document.onselectstart = wc.dFunc;
}

};var win_load = Object.addEvent(window, ["onload"], function () {
var mouse = new CMouse, div = document.createElement("div");
div.innerHTML = new Array(101).join("<br \/>");
document.body.appendChild(div);
});
</script>
</head>
<body></body>
</html>
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JK:支持民族工业,尽量少买X货</title>
<style>
.resizeDivClass
{
position:relative;
background-color:red;
width:1;
overflow:hidden;
z-index:100;
float:right;
left:1;
cursor:e-resize;
}
</style><script language=javascript>
var currentResizeDivObj=null;
function MouseDownToResize(event,obj){
currentResizeDivObj=obj;
obj.mouseDownX=event.clientX;
obj.pareneTdW=obj.parentNode.offsetWidth;
obj.pareneTableW=obj.parentNode.offsetParent.offsetWidth;
if(obj.setCapture) obj.setCapture();
else event.preventDefault();
}
function MouseMoveToResize(event){
if(!currentResizeDivObj) return ;
var obj=currentResizeDivObj;
event=event||window.event;
    if(!obj.mouseDownX) return false;
    var newWidth=obj.pareneTdW*1+event.clientX*1-obj.mouseDownX;
    if(newWidth>0)
    {
obj.parentNode.style.width = newWidth;
obj.parentNode.offsetParent.style.width=obj.pareneTableW*1+event.clientX*1-obj.mouseDownX;
}
}
function MouseUpToResize(){
if(!currentResizeDivObj) return;
if (currentResizeDivObj.releaseCapture) currentResizeDivObj.releaseCapture();
currentResizeDivObj=null;
}
</script></head><body onmousemove="MouseMoveToResize(event);" onmouseup="MouseUpToResize();" ><div style="font-size:10pt;">
注1：改变Table的列宽<br/>
<br/>
注：本页面仅在IE6/Firefox1.5下测试过。其它浏览器或其它版本未经测试。<br/>
注-----：JK：<a href="mailTo:[email protected]?subject=About%20ChangeColumnWidth">[email protected]</a><br/>
<hr/>
</div><table border=1  style="table-layout:fixed;" >
<tr bgcolor=cccccc >
<td valign=top >
  <div class="resizeDivClass" onmousedown="MouseDownToResize(event,this);" > </div>
  aaa
</td>
<td valign=top >
  <div class="resizeDivClass" onmousedown="MouseDownToResize(event,this);" > </div>
  bbb
</td>
<td valign=top >
  <div class="resizeDivClass" onmousedown="MouseDownToResize(event,this);" > </div>
  ccc
</td>
</tr>
<tr>
<td>aaaa  fdsa fda fdsa fdsa fdsa fdsa fdsa fda fdsa fdsafdsa fdsa fdsa a</td><td>bbbb</td><td>dddd</td>
</tr>
</table>
</body></html>
另一种风格的：<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JK:支持民族工业,尽量少买X货</title>
<script language="javascript">
var ResizeTable_CurrentTdObj=null;
function ResizeTable_MouseDown(event,obj){
  obj=obj||this;
  event=event||window.event;
  ResizeTable_CurrentTdObj=obj;
  obj.mouseDownX=event.clientX;
  obj.mouseDownY=event.clientY;
  obj.tdW=obj.offsetWidth;
  obj.tdH=obj.offsetHeight;
  if(obj.setCapture) obj.setCapture();
  else event.preventDefault();
}
function ResizeTable_MouseMove(event){
  if(!ResizeTable_CurrentTdObj) return ;
  var obj=ResizeTable_CurrentTdObj;
  event=event||window.event;
    if(!obj.mouseDownX) return false;
    if(obj.parentNode.rowIndex==0) {
      var newWidth=obj.tdW*1+event.clientX*1-obj.mouseDownX;
      if(newWidth>0) obj.style.width = newWidth;
    else obj.style.width =1;
  }
  if(obj.cellIndex==0){
      var newHeight=obj.tdH*1+event.clientY*1-obj.mouseDownY;
      if(newHeight>0) obj.style.height = newHeight;
    else obj.style.height =1;
  }
}
function ResizeTable_MouseUp(){
  if(!ResizeTable_CurrentTdObj) return;
  if (ResizeTable_CurrentTdObj.releaseCapture) ResizeTable_CurrentTdObj.releaseCapture();
  ResizeTable_CurrentTdObj=null;
}
function ResizeTable_Init(table,needChangeWidth,needChangeHeight)
{
  if(!needChangeWidth && !needChangeHeight) return;
  var oTh=table.rows[0];
  if(needChangeWidth){
    for(var i=0;i<oTh.cells.length;i++)   {
       var cell=oTh.cells[i];
       cell.style.cursor="e-resize";
       cell.style.width=cell.offsetWidth;
       cell.onmousedown =ResizeTable_MouseDown;
    }
  }
  if(needChangeHeight){
    for(var j=0;j<table.rows.length;j++)   {
       var cell=table.rows[j].cells[0];
       cell.style.cursor="s-resize";
       cell.onmousedown =ResizeTable_MouseDown;
    }
  }
  if(needChangeWidth && needChangeHeight) oTh.cells[0].style.cursor="se-resize";
  table.style.width=null;
  table.style.tableLayout="fixed";
}</script></head><body onmousemove="ResizeTable_MouseMove(event);" onmouseup="ResizeTable_MouseUp();" >
<div style="font-size:10pt;">
注1：改变Table的列宽<br/>
注2：部分代码来自csdn网友bluedoctor:http://community.csdn.net/Expert/topic/5282/5282361.xml<br/>
<br/>
注：本页面仅在IE6/Firefox1.5下测试过(效果不一致)。其它浏览器或其它版本未经测试。<br/>
注-----：JK：<a href="mailTo:[email protected]?subject=About%20ChangeColumnWidth">[email protected]</a><br/>
<hr/>
</div>
<table border="1" id="table1" style="width:100%;background-color:#eeeeee;"  >
<tr >
  <td >&nbps;</td>
  <td >header1</td>
  <td >header2</td>
  <td >header3</td>
  <td >hello hello hello</td>
</tr>
<tr>
  <td >1</td>
  <td >1</td>
  <td >thank you thank you </td>
  <td >男儿气壮</td>
  <td ><select><option>hello Hello</option></select></td>
</tr>
<tr>
  <td >2</td>
  <td >2</td>
  <td >you are welcome </td>
  <td >胸中吐万丈长虹</td>
  <td ><input type="text" name="T4" size="20" value="Hello Hello"></td>
</tr>
</table>
<script language ="javascript">
ResizeTable_Init(document.getElementById("table1"),true,true);
</script>
</body></html>