JGrid中拖动改变列宽的脚本 原型

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





jgrid拖动改变表格宽度















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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));
}


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修改版2





jgrid拖动改变表格宽度_修改版















拖动我1
拖动我2
拖动我3
拖动我4
拖动我5







































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));
}


[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
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。