js分栏效果实现代码_javascript技巧

**************************************************************************************
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?
**************************************************************************************









left panel




right panel





-->
**************************************************************************************
*/

/** 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;
}
};









在此处右键察看源代码并把其中的js保存为splitter.js

splitter.js使用方法：

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

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)

这4个div需要用css修饰一下


#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;
}


给body加上onload事件处理函数,以触发splitter:

onload="Splitter.init({id: 'splitter_Container', isWidthLimit: true});"

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.

还可以配置更多的参数, 比如:

isWidthLimit: 可选值true, false, 设置左面板是否宽度;

lPanelMaxWidth: 左面板最大宽度,比如: 500px;

lPanelMinWidth: 左面板最小宽度,比如: 100px;

barActiveColor: 分割线拖动的时候的颜色: 比如'red', '#0080ff';

更多web开发相关的内容就在blog.csdn.net/sunxing007