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js column effect implementation code_javascript skills

WBOYOriginal: 2016-05-16 18:47:271610browse

I have also seen some column splitting effects on the Internet, and there is also a jquery plug-in jquery.splitter.js, but they basically fail to solve a problem: if there is an iframe on the page, when dragging the dividing line past the iframe, the mouse will not operate. Yes, I have opened a post to discuss this issue. This example uses a small trick to solve this problem and make dragging smooth.

Copy code The code is as follows:

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</title> <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,
//Initial, maximum and minimum width of the left panel
lPanelInitWidth: '250px',
lPanelMaxWidth: '500px',
lPanelMinWidth: '200px ',
rPanelInitWidth: '800px',
rPanelMaxWidth: '999px',
rPanelMinWidth: '500px',
//The color of the divider when it is dragged
barActiveColor: '# 0080ff',
//Whether the maximum/minimum width is set for the left panel
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;
}
};

 "" width="100%" src="http://www.jb51.net">
 ;/div>
 How to use splitter.js:< ;br>
There needs to be a div on the page as a container (id=splitter_container): the draggable effect is carried out in this container

There need to be 3 divs in the container, representing the left column ( id=splitter_left_panel), dividing line (id=splitter_bar), right column (id=splitter_right_panel)

>
#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;
}< ;br>
#splitter_bar{
width: 8px;
height: 100%;
float: left;
background-color: #ccc;
cursor: col-resize;
}

#splitter_right_panel{
height: 100%;
padding-top: 10px;
}

Add onload event handler to body to trigger splitter:

onload="Splitter.init({id: 'splitter_Container', isWidthLimit: true});" 
The init method of Splitter passes in a json object as a configuration parameter, of which the container id is required.

You can also configure more parameters, such as:

isWidthLimit : optional value true, false, set whether to limit the width of the left panel;

lPanelMaxWidth: the maximum width of the left panel, for example: 500px;

lPanelMinWidth: the minimum width of the left panel, for example: 100px ;

barActiveColor: the color when the dividing line is dragged: such as 'red', '#0080ff';

More web development related content is at blog.csdn.net/sunxing007

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