　js版sliderBar(滑动条)控件

江恩

2023-12-01

支持实时监控sliderbar的数据，允许有callback回调的函数，有示例

1、可自定样式SetStyle()
2、带有onSroll功能
3、有setSldPoint（设置位置)接口
4、有getSldPoint(取得位置）接口
5、可自己设置sliderBar的最大值（不是sliderbar的长度，而是值）
6、自定义微调功能（setIncrement(10))，默认为5；

代码有点乱，接口不能清晰的看出来，不好意思了，先用着吧

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> never Slider Bar </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="never-online, blueDestiny">
<META NAME="Keywords" CONTENT="javascript Slider Bar">
<META NAME="Description" CONTENT="javascript Slider Bar">
<style>
body { background-color:#fff; text-align:center; font-family:verdana; font-size:9pt; }

.sliderObj { width:350px; height:25px; background-color:#fff; border:1px solid #666666; }
.sliderBar { width:20px; background-color:#666666; border:1px solid #333; }
.sliderBtn { width:30px; background-color:#666666; color:#fff; border:1px solid #000000; }

.r-sliderObj { width:300px; height:25px; background-color:#fff; border:1px solid #CC0000; }
.r-sliderBar { width:20px; background-color:#CC0000; border:1px solid #333; }
.r-sliderBtn { width:20px; background-color:#CC0000; color:#fff; border:1px solid #000000; }

.g-sliderObj { width:300px; height:25px; background-color:#fff; border:1px solid #006600; }
.g-sliderBar { width:20px; background-color:#006600; border:1px solid #333; }
.g-sliderBtn { width:20px; background-color:#006600; color:#fff; border:1px solid #000000; }

.b-sliderObj { width:300px; height:25px; background-color:#fff; border:1px solid #003399; }
.b-sliderBar { width:20px; background-color:#003399; border:1px solid #333; }
.b-sliderBtn { width:20px; background-color:#003399; color:#fff; border:1px solid #000000; }
</style>
</HEAD>

<SCRIPT LANGUAGE="JavaScript">
<!--
/*===============================================================
//
//    Module     : never SliderBar
//    Script by : never-online, blueDestiny
//    Updated    : 2006-5-12
//    Copyright : Miracle technology all reserved
//    Website    : http://www.never-online.net
//    Email      : blueDestiny@126.com
//    Blog       : http://blog.csdn.net/blueDestiny
//    Comment    : if you using never SliderBar please hold
//                 these copyrights.
//
//    compatible : only for IE
//    History    : none
//
================================================================*/

neverSliderBar.prototype.init=function() { with(this)
{
if ($(sldID + '__BtnL') && $(sldID + '__BtnR') && $(sldID + '__Bar')) {
sldBtnL = $(sldID + '__BtnL');
sldBar = $(sldID + '__Bar');
sldBtnR = $(sldID + '__BtnR');
}
else {
sldBtnL    = document.createElement("BUTTON");
sldBtnL.id = sldID + '__BtnL';
sldBar     = document.createElement("DIV");
sldBar.id = sldID + '__Bar';
sldBtnR    = document.createElement("BUTTON");
sldBtnR.id = sldID + '__BtnR';
document.body.appendChild(sldBtnL);
document.body.appendChild(sldBar);
document.body.appendChild(sldBtnR);
}
//-------------------------------------------------------------------
sldObj           = $(sldID);
sldObj.className = objStyle;
sldBarOffset     = Offset(sldBar);
sldObjOffset     = Offset(sldObj);
//-------------------------------------------------------------------
sldBtnL.value          = "<<";
sldBtnL.className      = btnStyle;
sldBtnL.style.position = "absolute";
//-------------------------------------------------------------------
sldBtnR.value          = ">";
sldBtnR.className      = btnStyle;
sldBtnR.style.position = "absolute";
//-------------------------------------------------------------------
sldBar.className       = barStyle;
sldBar.style.position = "absolute";
sldBar.style.top       = sldObjOffset.t;
sldBar.style.height    = sldObjOffset.h;
sldBar.style.left      = sldObjOffset.l;
instance.fixed();
//-------------------------------------------------------------------
sldObj.onmousedown = function() {instance.handleObjBefore()};
sldObj.onmouseup   = function() {instance.handleObjAfter()};
//-------------------------------------------------------------------
sldBtnL.onmousedown = function() {instance.handleBtnClick('l')};
sldBtnR.onmousedown = function() {instance.handleBtnClick('r')};
sldBtnL.onfocus     = function() {this.blur()};
sldBtnR.onfocus     = function() {this.blur()};
//-------------------------------------------------------------------
sldBar.onmousedown = function() {instance.handleSldDragStart()};
sldBar.onmousemove = function() {instance.handleSldDrag()};
sldBar.onmouseup   = function() {instance.handleSldDragEnd()};
}};
neverSliderBar.prototype.fixed=function() { with(this)
{
sldBarOffset = Offset(sldBar);
sldObjOffset = Offset(sldObj);

}};
neverSliderBar.prototype.handleObjAfter=function() { with(this)
{

}};
neverSliderBar.prototype.handleBtnClick=function(direction) { with(this)
{
direction = direction.toLowerCase();
sldPoint=instance.getSldPoint();
if(direction == 'l') {
instance.setSldPoint(this.sldPoint-sldIncrement);
}
else if (direction=='r') {
instance.setSldPoint(this.sldPoint+sldIncrement);
}
else {
return alert('not valid argument ' +direction);
}
instance.applyArg();
instance.getSldPoint();
}};
neverSliderBar.prototype.handleSldDragStart=function() { with(this)
{
sldBar.setCapture();
sldMoved = true;
sldBar.onlosecapture = function(){sldMoved=false;};
sldPoint = event.clientX-sldBarOffset.l;
}};
neverSliderBar.prototype.handleSldDrag=function() { with(this)
{
if(!sldMoved) return;
var p = event.clientX-sldPoint;
if (p <= sldObjOffset.l) {
sldBar.style.left = sldObjOffset.l;
}
else if (p >= (sldObjOffset.l+sldObjOffset.w-sldBarOffset.w)) {
sldBar.style.left = sldObjOffset.l+sldObjOffset.w-sldBarOffset.w;
}
else sldBar.style.left = p;
instance.applyArg();
instance.getSldPoint();
}};
neverSliderBar.prototype.handleSldDragEnd=function() { with(this)
{
sldBar.releaseCapture();
sldMoved=false;
}};
function Offset(e) {
var t = e.offsetTop;
var l = e.offsetLeft;
var w = e.offsetWidth;
var h = e.offsetHeight;
while(e=e.offsetParent) {
t+=e.offsetTop;
l+=e.offsetLeft;
}
return { t:t, l:l, w:w, h:h }
}

var r=new neverSliderBar("s1",callback,' <b>neverSliderBar</b> ');
r.sldMax=255;
r.setBtnStyle("r-sliderBtn");
r.setBarStyle("r-sliderBar");
r.setObjStyle("r-sliderObj");
r.init();
r.setSldPoint(100);
var g=new neverSliderBar("s2",callback,' <b>neverSliderBar</b> ');
g.sldMax=255;
g.setStyle("g-sliderBar","g-sliderBtn","g-sliderObj");
g.init();
g.setSldPoint(150);
var b=new neverSliderBar("s3",callback,' <b>neverSliderBar</b> ');
b.sldMax=255;
b.setBtnStyle("b-sliderBtn");
b.setBarStyle("b-sliderBar");
b.setObjStyle("b-sliderObj");
b.setIncrement(10);
b.init();
b.setSldPoint("200");

callback(' <b>neverSliderBar</b> ');
function callback(s) {
var $=document.getElementById;
var color_r=r.getSldPoint();
var color_g=g.getSldPoint();
var color_b=b.getSldPoint();
$("color").style.backgroundColor="rgb(" +color_r+ "," +color_g+ "," +color_b+ ")";
$("d1").innerHTML=s+color_r;
$("d2").innerHTML=s+color_g;
$("d3").innerHTML=s+color_b;
}
//-->
</SCRIPT>
<p>
power by never-online, blueDestiny, http://www.never-online.net
</p>
</BODY>
</HTML>

js版sliderBar(滑动条)控件

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