JGrid中拖动改变列宽的脚本原型- Javascript

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Javascript 中的 JGrid中拖动改变列宽的脚本原型

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-10-12 浏览: 186 ::

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javascript import css实例代码 javascript 兼容FF的onmouseenter和onmouseleave的代码

JGrid 中，可以拖动改变列宽，简单的原理就是改变相应的 col 的 style.width 今天看到skybot 同学在问这个问题，就又把这个功能拿出来，单独实现了一下（有改进）
顺便，把我研究过的，如何隐藏、显示一列的方法也实现了一把。但是这个功能和 css border-collapse:collapse; 有冲突，详情见代码2

点击运行可以看到效果:

<!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=utf-8" />
<title>jgrid拖动改变表格宽度</title>
<style type="text/css">
</style>
</head>
<body>
<div>
<table id="dataTable" border="1" cellpadding="0" cellspacing="0" style="table-layout:fixed;"> <colgroup> <col style="width:200px;" /> <col style="width:100px;" /> <col style="width:100px;" /> <col style="width:100px;" /> <col style="width:100px;" /> </colgroup> <tr> <td>拖动我1</td> <td>拖动我2</td> <td>拖动我3</td> <td>拖动我4</td> <td>拖动我5</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr>
</table>
</div>
<script language="javascript" type="text/javascript">
var JPos = {};
(function($){ $.getAbsPos = function(pTarget){ var x_ = y_ = 0; if(pTarget.style.position != "absolute"){ while(pTarget.offsetParent){ x_ += pTarget.offsetLeft; y_ += pTarget.offsetTop; pTarget = pTarget.offsetParent; } } x_ += pTarget.offsetLeft; y_ += pTarget.offsetTop; return {x:x_,y:y_}; } $.getEventPos = function(evt){ var _x,_y; evt = JEvent.getEvent(evt); if(evt.pageX || evt.pageY){ _x = evt.pageX; _y = evt.pageY; }else if(evt.clientX || evt.clientY){ _x = evt.clientX + (document.body.scrollLeft || document.documentElement.scrollLeft) - (document.body.clientLeft || document.documentElement.clientLeft); _y = evt.clientY + (document.body.scrollTop || document.documentElement.scrollTop) - (document.body.clientTop || document.documentElement.clientTop); }else{ return $.getAbsPos(evt.target); } return {x:_x,y:_y}; }
})(JPos);
//=======================================================================================
var JEvent = {};
(function($){ $.getEvent = function(evt){ evt = window.event || evt; if(!evt){ var fun = JEvent.getEvent.caller; while(fun != null){ evt = fun.arguments[0]; if(evt && evt.constructor == Event) break; fun = fun.caller; } } return evt; } $.doEvent = function(fun){ var args = arguments; return function(){ return fun(args); } }
})(JEvent);
//=======================================================================================
var colIndex;
var dataTable = document.getElementById("dataTable");
var cols = dataTable.getElementsByTagName("COL");
var dragMask = document.createElement("DIV");
var mAWidth = mAHeight = 300;
document.body.insertBefore(dragMask,document.body.lastChild);
dragMask.style.cssText = "width:" + mAWidth + "px;height:" + mAHeight + "px;position:absolute;background-color:#000;filter: Alpha(Opacity=10);-moz-opacity:0.1;opacity: 0.1;display:none;z-index:999999999;display:none;";
var mask_mousemove = function(evt){ if(document.selection){//IE ,Opera if(document.selection.empty) document.selection.empty();//IE else{//Opera document.selection = null; } }else if(window.getSelection){//FF,Safari window.getSelection().removeAllRanges(); } var oPos = JPos.getAbsPos(this); var mPos = JPos.getEventPos(evt); var x = mPos.x - oPos.x - mAWidth / 2; var tmpX = parseInt(cols[colIndex].style.width) + x; dragMask.style.left = mPos.x - mAWidth / 2 + "px"; cols[colIndex].style.width = tmpX >= 2 ? tmpX + "px" : "2px"; if(!document.all) dataTable.parentNode.style.width = dataTable.parentNode.clientWidth + x + "px";//这一句为处理FF时用。
}
var mask_mouseup = function(evt){ dragMask.style.display = "none";
}
dragMask.onmousemove = mask_mousemove;
dragMask.onmouseup = mask_mouseup;
var cell_mousedown = function(evt){ colIndex = this.colIndex; var mPos = JPos.getEventPos(evt); with(dragMask.style){ left = mPos.x - mAWidth / 2 + "px"; top = mPos.y - mAHeight / 2 + "px"; display = ""; }
}
var chk_click = function(evt){ var obj = cols[this.colIndex]; if(this.checked){ obj.style.cssText = obj.css_ ? obj.css_ : "width:100px;"; }else{ obj.css_ = obj.style.cssText; obj.style.cssText = document.all ? "display:none" : "visibility: collapse;overflow:hidden;width:0px;"; }
}
var i , o;
var label ,chk;
for(i = 0 ; o = dataTable.rows[0].cells[i] ; i++){ o.colIndex = i; o.onmousedown = cell_mousedown; label = document.createElement("LABEL"); document.body.insertBefore(label,document.body.lastChild); chk = document.createElement("INPUT"); chk.type = "checkbox"; label.appendChild(chk); chk.onclick = chk_click; chk.colIndex = i; chk.checked = "checked"; label.appendChild(document.createTextNode(o.innerHTML));
}
</script>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

修改版2

点击运行可以看到效果:

<!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=utf-8" />
<title>jgrid拖动改变表格宽度_修改版</title>
<style type="text/css">
</style>
</head>
<body>
<div>
<table id="dataTable" border="1" cellpadding="0" cellspacing="0" style="table-layout:fixed;border-collapse:collapse;"> <colgroup> <col style="width:200px;" /> <col style="width:100px;" /> <col style="width:100px;" /> <col style="width:100px;" /> <col style="width:100px;" /> </colgroup> <tr> <td>拖动我1</td> <td>拖动我2</td> <td>拖动我3</td> <td>拖动我4</td> <td>拖动我5</td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr>
</table>
</div>
<script language="javascript" type="text/javascript">
var JPos = {};
(function($){ $.getAbsPos = function(pTarget){ var x_ = y_ = 0; if(pTarget.style.position != "absolute"){ while(pTarget.offsetParent){ x_ += pTarget.offsetLeft; y_ += pTarget.offsetTop; pTarget = pTarget.offsetParent; } } x_ += pTarget.offsetLeft; y_ += pTarget.offsetTop; return {x:x_,y:y_}; } $.getEventPos = function(evt){ var _x,_y; evt = JEvent.getEvent(evt); if(evt.pageX || evt.pageY){ _x = evt.pageX; _y = evt.pageY; }else if(evt.clientX || evt.clientY){ _x = evt.clientX + (document.body.scrollLeft || document.documentElement.scrollLeft) - (document.body.clientLeft || document.documentElement.clientLeft); _y = evt.clientY + (document.body.scrollTop || document.documentElement.scrollTop) - (document.body.clientTop || document.documentElement.clientTop); }else{ return $.getAbsPos(evt.target); } return {x:_x,y:_y}; }
})(JPos);
//=======================================================================================
var JEvent = {};
(function($){ $.getEvent = function(evt){ evt = window.event || evt; if(!evt){ var fun = JEvent.getEvent.caller; while(fun != null){ evt = fun.arguments[0]; if(evt && evt.constructor == Event) break; fun = fun.caller; } } return evt; } $.doEvent = function(fun){ var args = arguments; return function(){ return fun(args); } }
})(JEvent);
//=======================================================================================
var colIndex;
var dataTable = document.getElementById("dataTable");
var cols = dataTable.getElementsByTagName("COL");
var dragMask = document.createElement("DIV");
var mAWidth = mAHeight = 300;
document.body.insertBefore(dragMask,document.body.lastChild);
dragMask.style.cssText = "width:" + mAWidth + "px;height:" + mAHeight + "px;position:absolute;background-color:#000;filter: Alpha(Opacity=10);-moz-opacity:0.1;opacity: 0.1;display:none;z-index:999999999;display:none;";
var mask_mousemove = function(evt){ if(document.selection){//IE ,Opera if(document.selection.empty) document.selection.empty();//IE else{//Opera document.selection = null; } }else if(window.getSelection){//FF,Safari window.getSelection().removeAllRanges(); } var oPos = JPos.getAbsPos(this); var mPos = JPos.getEventPos(evt); var x = mPos.x - oPos.x - mAWidth / 2; var tmpX = parseInt(cols[colIndex].style.width) + x; dragMask.style.left = mPos.x - mAWidth / 2 + "px"; cols[colIndex].style.width = tmpX >= 2 ? tmpX + "px" : "2px"; if(!document.all) dataTable.parentNode.style.width = dataTable.parentNode.clientWidth + x + "px";//这一句为处理FF时用。
}
var mask_mouseup = function(evt){ dragMask.style.display = "none";
}
dragMask.onmousemove = mask_mousemove;
dragMask.onmouseup = mask_mouseup;
var cell_mousedown = function(evt){ colIndex = this.colIndex; var mPos = JPos.getEventPos(evt); with(dragMask.style){ left = mPos.x - mAWidth / 2 + "px"; top = mPos.y - mAHeight / 2 + "px"; display = ""; }
}
var chk_click = function(evt){ var obj = cols[this.colIndex]; if(this.checked){ obj.style.cssText = obj.css_ ? obj.css_ : "width:100px;"; }else{ obj.css_ = obj.style.cssText; obj.style.cssText = document.all ? "display:none" : "visibility: collapse;overflow:hidden;width:0px;"; }
}
var i , o;
var label ,chk;
for(i = 0 ; o = dataTable.rows[0].cells[i] ; i++){ o.colIndex = i; o.onmousedown = cell_mousedown; label = document.createElement("LABEL"); document.body.insertBefore(label,document.body.lastChild); chk = document.createElement("INPUT"); chk.type = "checkbox"; label.appendChild(chk); chk.onclick = chk_click; chk.colIndex = i; chk.checked = "checked"; label.appendChild(document.createTextNode(o.innerHTML));
}
</script>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

ff下拖动时一大块影子是怎么产生的呢
是故意显示出来的。
把 -moz-opacity:0.1;opacity: 0.1 改掉。

javascript import css实例代码 javascript 兼容FF的onmouseenter和onmouseleave的代码

Javascript 中的 JGrid中拖动改变列宽的脚本 原型

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Javascript 中的 JGrid中拖动改变列宽的脚本原型