1：Ext.layout.ColumnLayout
它是为构建某个垂直式结构而准备的布局，当中包含已指定宽度的多个列，可以使用columnWidth或者width来指定子元素所占的列宽度
属性width总是以像素来固定宽度，并必须是数字大于或者等于1，属性columnWidth是百分比相对单位，并必须是百分比字符串区间是大于0小于1
使用columnWidth属性来分配列时，columnWidth加起来必须是等于1(或110%),否则渲染出来的布局可能会出现不正常。
2：指定列宽度的三种方式
第一：通过width属性来指定列宽度
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>使用width属性指定列宽度</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="ext3.2/resources/css/ext-all.css"></link>
<script type="text/javascript" src="ext3.2/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext3.2/ext-all.js"></script>
<script type="text/javascript" src="ext3.2/src/local/ext-lang-zh_CN.js"></script>
<script type="text/javascript">
Ext.onReady(function() {
new Ext.Panel({
renderTo: 'column',
width: 500,
height: 150,
title: 'Columnayout',
layout: 'column', //指定布局方式为column
defaults: {
bodyStyle: 'background-color: #FFFFFF', //设置面板的背景色
frame: true
},
frame: true,
items: [
{title: 'first', html: '第一列', width: 200, height: 100},
{title: 'second', html: '第二列', width: 200, height: 100},
]
});
});
</script>
</head>
<body>
<div id="column"></div>
</body>
</html>
程序效果：
通过设置子面板的width属性，来设定固定的列宽度分别为200、200以及剩余的宽度。
第二：columnWidth属性指定列宽度
代码：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>columnWidth属性指定列宽度</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="ext3.2/resources/css/ext-all.css"></link>
<script type="text/javascript" src="ext3.2/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext3.2/ext-all.js"></script>
<script type="text/javascript" src="ext3.2/src/local/ext-lang-zh_CN.js"></script>
<script type="text/javascript">
Ext.onReady(function() {
new Ext.Panel({
renderTo: 'column',
width: 500,
height: 150,
title: 'Columnayout',
layout: 'column', //指定布局方式为column
frame: true,
defaults: {
bodyStyle: 'background-color: #FFFFFF', //设置面板的背景色
frame: true
},
items: [ //通过columnWidth属性来指定宽占容器的百分比
{title: 'first', html: '第一列', columnWidth: 0.4, height: 100},
{title: 'second', html: '第二列', columnWidth: 0.6, height: 100},
]
});
});
</script>
</head>
<body>
<div id="column"></div>
</body>
</html>
程序效果图：
第三： width和columnWidth属性指定列宽度
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>columnWidth属性指定列宽度</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="ext3.2/resources/css/ext-all.css"></link>
<script type="text/javascript" src="ext3.2/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="ext3.2/ext-all.js"></script>
<script type="text/javascript" src="ext3.2/src/local/ext-lang-zh_CN.js"></script>
<script type="text/javascript">
Ext.onReady(function() {
new Ext.Panel({
renderTo: 'column',
width: 500,
height: 150,
title: 'Columnayout',
layout: 'column', //指定布局方式为column
frame: true,
defaults: {
bodyStyle: 'background-color: #FFFFFF', //设置面板的背景色
frame: true,
height: 100
},
items: [
{title: 'first', html: '第一列', width: 150}, // 指定列宽度为150像素
{title: 'second', html: '第二列', columnWidth: 0.4}, //指定列宽度为剩下宽度的40%
{title: 'third', html: '第三列', columnWidth: 0.6} //指定列宽度为剩下宽度的60%
]
});
});
</script>
</head>
<body>
<div id="column"></div>
</body>
</html>
程序效果：
设置panel的宽度为500，
第一列宽度=150（因为第一列是通过width配置项指定的固定值）
第二列宽度=（500-150）* 0.4 (按比例分割剩余宽度）
第三列宽度=（500-150）* 0.6（说明：按比例分割剩余宽度）
