Extjs复习笔记（十三）-- GridPanel
这一节开始，复习grid，博大精深呀！
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拿官网的例子来看看。
代码和注释如下：
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>主窗口</title><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><link rel="stylesheet" type="text/css" href="../resources/css/ext-all.css" /></script><script type="text/javascript" src="../adapter/ext/ext-base.js"></script><script type="text/javascript" src="../ext-all.js"></script><style type=text/css>/* style rows on mouseover */.x-grid3-row-over .x-grid3-cell-inner {font-weight: bold;}/* style for the "buy" ActionColumn icon */.x-action-col-cell img.buy-col {height: 16px;width: 16px;background-image: url(icon/accept.png);}/* style for the "alert" ActionColumn icon */.x-action-col-cell img.alert-col {height: 16px;width: 16px;background-image: url(icon/error.png);}</style><script type="text/javascript">Ext.onReady(function(){ Ext.QuickTips.init(); //开启tooltip提示功能 // During development, // it is generally best to disable state management as dynamically-generated ids // can change across page loads, leading to unpredictable results. The developer // should ensure that stable state ids are set for stateful components in real apps. Ext.state.Manager.setProvider(new Ext.state.CookieProvider()); // 下面要使用到的数据 var myData = [ ['3m Co', 71.72, 0.02, 0.03, '9/1 12:00am'], ['Alcoa Inc', 29.01, 0.42, 1.47, '9/1 12:00am'], ['Altria Group Inc', 83.81, 0.28, 0.34, '9/1 12:00am'], ['American Express Company', 52.55, 0.01, 0.02, '9/1 12:00am'], ['American International Group, Inc.', 64.13, 0.31, 0.49, '9/1 12:00am'], ['AT&T Inc.', 31.61, -0.48, -1.54, '9/1 12:00am'], ['Boeing Co.', 75.43, 0.53, 0.71, '9/1 12:00am'], ['Caterpillar Inc.', 67.27, 0.92, 1.39, '9/1 12:00am'], ['Citigroup, Inc.', 49.37, 0.02, 0.04, '9/1 12:00am'], ['E.I. du Pont de Nemours and Company', 40.48, 0.51, 1.28, '9/1 12:00am'], ['Exxon Mobil Corp', 68.1, -0.43, -0.64, '9/1 12:00am'], ['General Electric Company', 34.14, -0.08, -0.23, '9/1 12:00am'], ['General Motors Corporation', 30.27, 1.09, 3.74, '9/1 12:00am'], ['Hewlett-Packard Co.', 36.53, -0.03, -0.08, '9/1 12:00am'], ['Honeywell Intl Inc', 38.77, 0.05, 0.13, '9/1 12:00am'], ['Intel Corporation', 19.88, 0.31, 1.58, '9/1 12:00am'], ['International Business Machines', 81.41, 0.44, 0.54, '9/1 12:00am'], ['Johnson & Johnson', 64.72, 0.06, 0.09, '9/1 12:00am'], ['JP Morgan & Chase & Co', 45.73, 0.07, 0.15, '9/1 12:00am'], ['McDonald\'s Corporation', 36.76, 0.86, 2.40, '9/1 12:00am'], ['Merck & Co., Inc.', 40.96, 0.41, 1.01, '9/1 12:00am'], ['Microsoft Corporation', 25.84, 0.14, 0.54, '9/1 12:00am'], ['Pfizer Inc', 27.96, 0.4, 1.45, '9/1 12:00am'], ['The Coca-Cola Company', 45.07, 0.26, 0.58, '9/1 12:00am'], ['The Home Depot, Inc.', 34.64, 0.35, 1.02, '9/1 12:00am'], ['The Procter & Gamble Company', 61.91, 0.01, 0.02, '9/1 12:00am'], ['United Technologies Corporation', 63.26, 0.55, 0.88, '9/1 12:00am'], ['Verizon Communications', 35.57, 0.39, 1.11, '9/1 12:00am'], ['Wal-Mart Stores, Inc.', 45.45, 0.73, 1.63, '9/1 12:00am'] ]; // 创建store模型，用来规定表格中每一列的数据索引名和数据类型等 var store = new Ext.data.ArrayStore({ fields: [ {name: 'company'}, {name: 'price', type: 'float'}, {name: 'change', type: 'float'}, {name: 'pctChange', type: 'float'}, {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'} //日期型，格式：09/01/2010 ] }); // 用刚创建的模型来加载上面的数据 store.loadData(myData); // 开始创建 Grid var grid = new Ext.grid.GridPanel({ store: store, columns: [ //设置每一列的其它属性 { id :'company', header : 'Company', //列名 width : 160, sortable : true, //可排序 dataIndex: 'company' //这就是上面store里面的第一个属性 }, { header : 'Price', width : 75, sortable : true, renderer : 'usMoney', dataIndex: 'price' }, { header : 'Change', width : 75, sortable : true, renderer : change, //该函数在下面定义，用来控制显示的样式 dataIndex: 'change' }, { header : '% Change', width : 75, sortable : true, renderer : pctChange, //该函数也在下面定义，用来控制显示的样式 dataIndex: 'pctChange' }, { header : 'Last Updated', width : 85, sortable : true, renderer : Ext.util.Format.dateRenderer('m/d/Y'), //用这种方式来格式化日期 dataIndex: 'lastChange' }, { xtype: 'actioncolumn', //注意这种类型，A grid column type which renders an icon, or a series of icons in a grid cell,and offers a scoped click handler for each icon. width: 50, items: [{ icon : 'icon/delete.gif', // 引用图标地址 tooltip: 'Sell stock', //浮动小汽泡提示，当鼠标放上去时就显示 handler: function(grid, rowIndex, colIndex) { var rec = store.getAt(rowIndex); alert("Sell " + rec.get('company')); } }, { getClass: function(v, meta, rec) { // Or return a class from a function if (rec.get('change') < 0) { this.items[1].tooltip = 'Do not buy!'; return 'alert-col'; } else { this.items[1].tooltip = 'Buy stock'; return 'buy-col'; } }, handler: function(grid, rowIndex, colIndex) { var rec = store.getAt(rowIndex); alert("Buy " + rec.get('company')); } }] } ], stripeRows: true, autoExpandColumn: 'company', //默认按company列来排序 height: 350, width: 600, title: 'Array Grid', // config options for stateful behavior stateful: true, stateId: 'grid' }); /** * 用来控制行的显示颜色，负的为红色的，正数为绿色的 */ function change(val) { if (val > 0) { return '<span style="color:green;">' + val + '</span>'; } else if (val < 0) { return '<span style="color:red;">' + val + '</span>'; } return val; } /** * 更新行的显示颜色 */ function pctChange(val) { if (val > 0) { return '<span style="color:green;">' + val + '%</span>'; } else if (val < 0) { return '<span style="color:red;">' + val + '%</span>'; } return val; } // render the grid to the specified div in the page grid.render(Ext.getBody());});</script></head><body bgcolor="#9ad8ef"></body></html>?
?其中有个getClass函数，官网解释如下：
A function which returns the CSS class to apply to the icon image. The function is passed the following parameters:
The Store which is providing the data Model.
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