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js 分栏效果实现代码_javascript技巧

WBOYoriginal: 2016-05-16 18:47:271630parcourir

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:

Splitter demo

<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 <link href="splitter.css" type="text/css" rel="stylesheet" /> <script src="splitter.js"></script>

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 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

 <br>#splitter_container{ <br>width: 100%; <br>height: 100%; <br>border: solid #eee 1px; <br>margin: 0px; <br>padding: 0px; <br>overflow: hidden; <br>}<br> <br>#splitter_left_panel{ <br>width: 300px; <br>height: 100%; <br>float: left; <br>border: solid blue 0px; <br>}<br> <br>#splitter_bar{ <br>width: 8px; <br>height: 100%; <br>float: left; <br>background-color: #ccc; <br>cursor: col-resize; <br>}<br> <br>#splitter_right_panel{ <br>height: 100%; <br>padding-top: 10px; <br>} <br>

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, 设置左面板是否限制宽度;

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

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