js 分栏效果实现代码

网上我也见到一些分栏效果,也有一个jquery的插件jquery.splitter.js, 但是他们基本都没有解决一个问题:如果页面上有iframe, 当拖动分割线经过iframe的时候,鼠标不听使唤了,我曾经开过帖子讨论过这个问题。本例采用一个小技巧解决了这个问题,使拖动流畅。
复制代码 代码如下:
<html>
<head>
<title>Splitter demo</title>
<style>
            #splitter_container{
             width: 100%;
             height: 100%;
             border: solid #eee 1px;
             margin: 0px;
             padding: 0px;
             overflow: hidden;
            }
            #splitter_left_panel{
             width: 300px;
             height: 100%;
             float: left;
             border: solid blue 0px;
            }
            #splitter_bar{
             width: 8px;
             height: 100%;
             float: left;
             background-color: #ccc;
             cursor: col-resize;
            }
            #splitter_right_panel{
             height: 100%;
             padding-top: 10px;
            }
</style>
<script>
/*
* splitter.js
* author: sunxing007
* http://blog.csdn.NET/sunxing007
* date: 08/26/2009

**************************************************************************************
The css script below is needed for the html page when using splitter.js, please save
it as splitter.css, and modify it carefully.
**************************************************************************************
#splitter_container{
width: 100%;
height: 100%;
border: solid #eee 1px;
margin: 0px;
padding: 0px;
overflow: hidden;
}
#splitter_left_panel{
width: 300px;
height: 100%;
float: left;
border: solid blue 0px;
}
#splitter_bar{
width: 8px;
height: 100%;
float: left;
background-color: #ccc;
cursor: col-resize;
}
#splitter_right_panel{
height: 100%;
padding-top: 10px;
}
**************************************************************************************
How to use this splitter?
**************************************************************************************
<!--
     <html>
<head>
<title>Splitter demo</title>
<link href="splitter.css" type="text/css" rel="stylesheet" />
<script src="splitter.js"></script>
</head>
<body onload="Splitter.init({id: 'splitter_Container'});">
<div id="splitter_container">
<div id="splitter_left_panel">
left panel
<!--you can put any html code here-->
</div>
<div id="splitter_bar"></div>
<div id="splitter_right_panel">
right panel
<!--you can put any html code here-->
</div>
</div>
</body>
</html>
-->
**************************************************************************************
*/

/** this is a helper function used to get the dom element specified by id **/

function $(id){return document.getElementById(id);}

/** the main functionality of splitter **/

var Splitter = {
    container: null,
    lPanel: null,
    rPanel: null,
    bar: null,
movingBar: null,
//左面板初始,最大,最小宽度
    lPanelInitWidth: '250px',
    lPanelMaxWidth: '500px',
    lPanelMinWidth: '200px',
    rPanelInitWidth: '800px',
    rPanelMaxWidth: '999px',
    rPanelMinWidth: '500px',
    //分隔线被拖动的时候的颜色
    barActiveColor: '#0080ff',
    //左面的面板是否设置最大/最小宽度
    isWidthLimit: true,
    init: function(config){
if(!config.id){
alert('Can not initialize splitter.');
return;
}
if($(config.id)){
this.container = $(config.id);
if(!($('splitter_left_panel')&&$('splitter_right_panel')&&$('splitter_bar'))){
alert('Can not initialize splitter.');
return;
}
else{
this.lPanel = $('splitter_left_panel');
this.rPanel = $('splitter_right_panel');
this.bar = $('splitter_bar');
}
}

if(config.lPanelMaxWidth){
this.lPanelMaxWidth = config.lPanelMaxWidth;
}
if(config.lPanelMinWidth){
this.lPanelMinWidth = config.lPanelMinWidth;
}
if(config.rPanelMaxWidth){
this.rPanelMaxWidth = config.rPanelMaxWidth;
}
if(config.rPanelMinWidth){
this.rPanelMinWidth = config.rPanelMinWidth;
}
if(config.lPanelInitWidth){
this.lPanelInitWidth = config.lPanelInitWidth;
}
if(config.rPanelInitWidth){
this.rPanelInitWidth = config.rPanelInitWidth;
}
if(config.barActiveColor){
this.barActiveColor = config.barActiveColor;
}
//alert(typeof(config.isWidthLimit));
if(config.isWidthLimit!=undefined){
this.isWidthLimit = config.isWidthLimit;
}
var mask = document.createElement('div');
document.body.appendChild(mask);
with(mask.style){
position = 'absolute';
left = '0px';
top = '0px';
zIndex = 900;
width = '100%';
height = '100%';
display = 'none';
backgroundColor = '#ccc';
filter = 'alpha(opacity=10)';
}
//background-color:red;filter:alpha(opacity=60)
Splitter.mask = mask;
this.bar.onmousedown = Splitter.start;
    },
    start: function(){
var o = Splitter.container;
o.lastMouseX = event.x;
Splitter.mask.style.display = '';
var movingBar = document.createElement('div');
Splitter.container.appendChild(movingBar);
with(movingBar.style){
position = 'absolute';
left = Splitter.bar.offsetLeft + 'px';
top = '0px';
width = Splitter.bar.currentStyle.width;
height = '100%';
backgroundColor = Splitter.barActiveColor;
zIndex = 999;
cursor = 'col-resize';
}
movingBar.dx = 0;
Splitter.movingBar = movingBar;
document.onmousemove = Splitter.move;
document.onmouseup = Splitter.end;
    },
    move: function(){
var o = Splitter.container;
var dx = event.x - o.lastMouseX;
Splitter.movingBar.dx = Splitter.movingBar.dx + dx;
var left = parseInt(Splitter.movingBar.style.left) + dx;
Splitter.movingBar.style.left = left;
o.lastMouseX = event.x;
    },
    end: function(){
document.onmousemove = null;
document.onmouseup = null;
Splitter.mask.style.display = 'none';
var dx = Splitter.movingBar.dx;
Splitter.container.removeChild(Splitter.movingBar);
var w = parseInt(Splitter.lPanel.currentStyle.width) + dx;
if(Splitter.isWidthLimit){
        var _width = (w > parseInt(Splitter.lPanelMaxWidth) ? Splitter.lPanelMaxWidth : (w < parseInt(Splitter.lPanelMinWidth) ?
Splitter.lPanelMinWidth : w));
        w = _width;
}
Splitter.lPanel.style.width = w;
    }
};
</script>
</head>
<body onload="Splitter.init({id: 'splitter_Container', isWidthLimit: true});">
    <div id="splitter_container">
            <div id="splitter_left_panel">
                <iframe frameborder="0" height="100%" id="" width="100%" src="http://www.jb51.NET"></iframe>
            </div>
            <div id="splitter_bar"></div>
            <div id="splitter_right_panel">
                    在此处右键察看源代码并把其中的js保存为splitter.js<br>
                    splitter.js使用方法:<br>
                    页面上需要有一个div作为容器(id=splitter_container): 可拖动效果就在这个容器里面进行<br>
                    容器里面需要有3个div,分别代表左栏(id=splitter_left_panel),分割线(id=splitter_bar), 右栏(id=splitter_right_panel)<br>
                    这4个div需要用css修饰一下<br>
                    <code>
#splitter_container{
width: 100%;
height: 100%;
border: solid #eee 1px;
margin: 0px;
padding: 0px;
overflow: hidden;
}<br>
#splitter_left_panel{
width: 300px;
height: 100%;
float: left;
border: solid blue 0px;
}<br>
#splitter_bar{
width: 8px;
height: 100%;
float: left;
background-color: #ccc;
cursor: col-resize;
}<br>
#splitter_right_panel{
height: 100%;
padding-top: 10px;
}
</code>
<br><br>
给body加上onload事件处理函数,以触发splitter: <br>
onload="Splitter.init({id: 'splitter_Container', isWidthLimit: true});" <br>
Splitter的init方法传入一个json对象作为配置参数,其中容器id是必需的.<br>
还可以配置更多的参数, 比如:<br>
isWidthLimit: 可选值true, false, 设置左面板是否限制宽度;<br>
lPanelMaxWidth: 左面板最大宽度,比如: 500px;<br>
lPanelMinWidth: 左面板最小宽度,比如: 100px;<br>
barActiveColor: 分割线拖动的时候的颜色: 比如'red', '#0080ff';<br>
更多web开发相关的内容就在<a href='http://blog.csdn.NET/sunxing007'>blog.csdn.NET/sunxing007</a>    
            </div>
    </div>
</body>
</html>

JavaScript技术js 分栏效果实现代码,转载需保留来源!

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