CutePsWheel javascript libary 控制输入文本框为可使用滚轮控制的js库

简介

实现类似于Photoshop控制面板输入文本数字的效果，所以名称叫做PsWheel。用于控制输入数字类型文本框实现鼠标滚轮上下滑动改变值，支持正整数、小数类型输入文本。
兼容IE/Firefox/Opera/Safari/Chrom
可定义滚动变化间隔值，支持整数、浮点数
双击恢复初始值
仅3.92K，压缩后2.67K
代码

/* 
* cutePsWheel JS 
* Description:A js liabary which control the text type of input box can plus or minus value like Photoshop 
* Author:walkingp 
* Site:http://www.51obj.cn/ 
* E-mail:[e-mail] 
* Last Modified:2010-2-5 
*/ 
//Initial the wheel scroll event 
var _orientValue=[];//orient value 
var _interval=[]; 
var _length=[]; 
function InitScrollFunc(){ 
var eles=GetObj(); 
for(var i=0;i<eles.length;i++){ 
if(document.addEventListener){ 
(function(i){eles[i].addEventListener('DOMMouseScroll',function(e){e.preventDefault();e.stopPropagation();var direct=e.detail<0?1:-1;ScrollText(eles[i],direct);},false);})(i); 
eles[i].addEventListener('dblclick',RestoreOrientValue,false); 
eles[i].addEventListener('blur',RemoveScrollFunc,false); 
//eles[i].addEventListener('mouseover',SetFocus,false); 
}//W3C/Mozila 
(function(i){eles[i].onmousewheel=function(){ScrollFunc(event,eles[i]);}})(i);//IE/Opera/Chrome/Safari 
(function(i){eles[i].ondblclick=function(){RestoreOrientValue(eles[i]);;}})(i); 
(function(i){eles[i].onblur=function(){RemoveScrollFunc(eles[i]);;}})(i);//Remove the wheel scroll event 
(function(i){eles[i].onmouseover=function(){SetFocus(eles[i]);}})(i); 
/*Initial the value array*/ 
if(eles[i].value!=""){ 
_orientValue.push(eles[i].value); 
}else{ 
_orientValue.push(0); 
} 
if(eles[i].getAttribute("interval")){ 
_interval.push(parseFloat(eles[i].getAttribute("interval"))); 
if(eles[i].getAttribute("interval").toString().indexOf(".")>0){ 
var __length=parseInt(eles[i].getAttribute("interval").toString().length) - parseInt(eles[i].getAttribute("interval").toString().indexOf("."))-1; 
_length.push(__length);//get the length follow the decimal point 
}else{ 
_length.push(0); 
} 
}else{ 
_interval.push(1); 
_length.push(0); 
} 
} 
} 
/*set object focus*/ 
function SetFocus(obj){ 
obj.focus(); 
obj.select(); 
} 
/*remove the wheel scroll event*/ 
function RemoveScrollFunc(obj){ 
if(document.removeEventListener){ 
obj.removeEventListener('DOMMouseScroll',ScrollFunc,false); 
obj.removeEventListener('dblclick',RestoreOrientValue,false); 
}else if(document.detachEvent){ 
obj.detachEvent('onmousewheel',ScrollFunc); 
obj.detachEvent('ondblclick',RestoreOrientValue); 
} 
} 
/*Restore the text box's orient value when double click event trigger*/ 
function RestoreOrientValue(obj){ 
var eles=GetObj(); 
for(var i=0;i<eles.length;i++){ 
if(obj==eles[i]){ 
obj.value=_orientValue[i]; 
obj.select(); 
} 
} 
} 
//core function 
function ScrollFunc(){//for HTML DOM 
var direct=0; 
var e=arguments[0]||window.event; 
if(window.event){ 
window.event.returnValue=false; 
window.event.cancelBubble=true;//Stop event bubble 
} 
if(e.wheelDelta){ 
direct=e.wheelDelta>0?1:-1; 
} 
ScrollText(arguments[1],direct); 
} 
//reference by ScrollFunc 
function ScrollText(obj,direct){ 
obj.focus(); 
var _value=0; 
if(obj.value!=""){ 
_value=parseFloat(obj.value); 
} 
var eles=GetObj(); 
for(var i=0;i<eles.length;i++){ 
if(obj==eles[i]){ 
if(direct>0){ 
_value+=_interval[i]; 
}else{ 
_value-=_interval[i]; 
} 
obj.value=_value.toFixed(_length[i]);//calulcate the rounding result 
obj.select();//set select status 
} 
} 
} 
//referenced function,only get the object which has the 'rel' attribute 
function GetObj(){ 
var objs=document.getElementsByTagName('input'); 
var elements=[]; 
for(var i=0;i<objs.length;i++){ 
if(objs[i].type=='text' && objs[i].getAttribute('rel') == 'wheel'){ 
elements.push(objs[i]); 
} 
} 
return elements; 
} 
//Add the WheelScroll function 
(function AddLoadEvent(func){ 
var _oldonload=window.onload; 
if(typeof window.onload!='function'){ 
window.onload=func; 
}else{ 
window.onload=function(){ 
_oldonload(); 
func(); 
} 
} 
})(InitScrollFunc);

效果图

资源
点击预览 http://demo.3water.com/js/cutePSWheel/demo.html
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