基于jQuery EasyWidgets插件实现可拖动窗口效果

实现背景与目标

Google在Ajax特效应用方面表现突出，例如Google Suggest、Google Map以及iGoogle的可拖动窗口等。为了在网站上实现类似效果，本文基于iGoogle的设计思路制作了一个简易Demo。

技术选型与插件介绍

该Demo基于jQuery框架中的EasyWidgets插件开发，该插件支持免费下载，地址为http://plugins.jquery.com/project/easywidgets。

完整代码实现

以下直接展示实现该效果所需的源代码，供读者学习参考。

<html>
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<link rel="stylesheet" type="text/css" media="screen" href="css/my.css" rel="external nofollow" rel="external nofollow" mce_href="css/my.css" rel="external nofollow" rel="external nofollow" />
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery-ui.min.js"></script>
<script type="text/javascript" src="js/jquery.easywidgets.js"></script> 
<script src="js/example.js" type="text/javascript"></script>
</head>

<body>
<!--left-->
<div id="left" class="widget-place column1">
<div id="ldiv1" class="widget movable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">左边-----用鼠标拖动</div> 
</div>

<div id="ldiv2" class="widget movable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">左边-----用鼠标拖动</div>
</div>
<div id="ldiv3" class="widget movable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">左边-----用鼠标拖动</div>
</div>
</div>

<!--middle-->
<div id="middle" class="widget-place column2"> 
<div id="mdiv1" class="widget movable collapsable removable editable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div class="widget-editbox" style="background:#CC6699" mce_style="background:#CC6699">这里就是放编辑的内容,为了显眼，我加了背景</div>
<div id="content" class="widget-content">中间------用鼠标拖动</div>
</div>
<div id="mdiv2" class="widget movable removable editable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">中间------用鼠标拖动</div>
</div>
<div id="mdiv3" class="widget movable removable editable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">中间------用鼠标拖动</div>
</div>
</div>

<!--right-->
<div id="right" class="widget-place column3">
<div id="rdiv1" class="widget movable"> 
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">右边------用鼠标拖动</div>
</div>
<div id="rdiv2" class="widget movable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">右边------用鼠标拖动</div>
</div>
<div id="rdiv3" class="widget movable">
<div id="header" class="widget-header"><strong>drar me</strong> </div>
<div id="content" class="widget-content">右边------用鼠标拖动</div>
</div>
</div>
</body>
</html>

CSS样式部分定义了页面布局及窗口外观。

body{
margin: 0;
padding: 0;
background-color: silver;
font-family: 'Lucida Grande','Lucida Sans Unicode','宋体','新宋体',arial,verdana,sans-serif; 
color: #666; 
font-size:20px; 
line-height:150%; 
}
#left{
width: 380px;
height: 100%;
padding: 10px;
position: absolute;
top: 10px;
left: 10px;
border: solid red 2px; 
}
#left .widget {
width: 340px;
height: 150px;
padding; 10px;
margin: 20px;
border: solid red 2px;
background-color: white;
}
#left .widget .widget-header {
width: 340px;
height: 30px;
padding: 0;
margin: 0;
color: red;
position: static;
background-color: gray;
}
#middle{
width: 400px;
height: 100%;
position: absolute;
top:10px;
left: 435px;
padding: 10px;
margin: 0 30px 0; 

border: solid red 2px; 
}
#middle .widget {
width: 360px;
height: 150px;
padding; 10px;
margin: 20px;
border: solid red 2px;
background-color: white;
}
#middle .widget .widget-header {
width: 360px;
height: 30px;
padding: 0;
margin: 0;
color: red;
position: static;
background-color: gray;
}
#right{
width: 380px;
height: 100%;
padding: 10px;
position: absolute;
top: 10px;
right: 10px;
border: solid red 2px; 
}
#right .widget {
width: 340px;
height: 150px;
padding; 10px;
margin: 20px;
border: solid red 2px;
background-color: white;
}
#right .widget .widget-header {
width: 340px;
height: 30px;
padding: 0;
margin: 0;
color: red;
position: static;
background-color: gray;
}

JavaScript代码负责初始化EasyWidgets插件并配置相关交互功能。

$(document).ready(function(){ 
$.fn.EasyWidgets({
i18n : { 
editText : '编辑', 
closeText : '关闭', 
extendText : '展开', 
collapseText : '折叠', 
cancelEditText : '取消' 
}
});
});