Extjs复习笔记（十三）-- GridPanel

最新推荐文章于 2018-12-12 10:28:22 发布

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#EXT #CSS #JavaScript #XHTML #HTML #ViewUI

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本文通过一个具体的 ExtJS Grid 示例，介绍了如何配置 Grid 的各项属性，包括数据加载、列配置、样式设置及交互功能实现等。展示了如何利用 ExtJS 构建功能丰富的数据展示表格。

这一节开始，复习grid，博大精深呀！

拿官网的例子来看看。

代码和注释如下：

<!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:

v : Object
The value of the column's configured field (if any).
metadata : Object
An object in which you may set the following attributes:
- css : String
  A CSS class name to add to the cell's TD element.
- attr : String
  An HTML attribute definition string to apply to the data container element withinthe table cell (e.g. 'style="color:red;"').
r : Ext.data.Record
The Record providing the data.
rowIndex : Number
The row index..
colIndex : Number
The column index.
store : Ext.data.Store
The Store which is providing the data Model.