如何实现grid禁止选择特定行

Question

用extjs写了个grid，并且有checkboxselectModel，在每一行里，有一列渲染是button。
在点击button时，改变其中某一列的值，并使这一列无法被选择。找了cm和sm的方法，都没有相关方法。请问该如何实现呢？
使用的extjs3.2版本。

Answer 1

[code="js"]/*!

• [e-mail]
• http://suziwen.com */

Ext.onReady(function(){

Ext.QuickTips.init();

var xg = Ext.grid;

// shared reader
var reader = new Ext.data.ArrayReader({}, [
   {name: 'company'},
   {name: 'price', type: 'float'},
   {name: 'change', type: 'float'},
   {name: 'pctChange', type: 'float'},
   {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'},
   {name: 'industry'},
   {name: 'desc'}
]);

////////////////////////////////////////////////////////////////////////////////////////
// Grid 2
////////////////////////////////////////////////////////////////////////////////////////
var sm = new xg.CheckboxSelectionModel({
  listeners:{
beforerowselect : function(  _this ,  _rowIndex ,  _keepExisting ,  _record  ) {
   //if()在这里加上业务逻辑，指定哪条数据不让选择中就返回FALSE
   if(_rowIndex == 4){
      return false;
   }else{
     return true;
   }
}

  }
});
var grid2 = new xg.GridPanel({
    store: new Ext.data.Store({
        reader: reader,
        data: xg.dummyData
    }),
    cm: new xg.ColumnModel({
        defaults: {
            width: 120,
            sortable: true
        },
        columns: [
            sm,
            {id:'company',header: "Company", width: 200, dataIndex: 'company'},
            {header: "Price", renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
            {header: "Change", dataIndex: 'change'},
            {header: "% Change", dataIndex: 'pctChange'},
            {header: "Last Updated", width: 135, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
        ]
    }),
    sm: sm,
    columnLines: true,
    width:600,
    height:300,
    frame:true,
    title:'Framed with Checkbox Selection and Horizontal Scrolling',
    iconCls:'icon-grid',
    renderTo: document.body,
bbar:[{
  text:'disable',
  handler:function(){
    //这里的getCell里的4表示第4行，0表示第一列，到时根据你这个SM具体放在哪而定
    var cell = grid2.getView().getCell(4, 0);
                    var checker = Ext.fly(cell.firstChild.firstChild);
                    checker.removeClass('x-grid3-row-checker');
                    checker.addClass('x-grid3-row-unselectable');
  }
},{
  text:'enable',
  handler:function(){
    var cell = grid2.getView().getCell(4, 0);
                    var checker = Ext.fly(cell.firstChild.firstChild);
                    checker.removeClass('x-grid3-row-unselectable');
                    checker.addClass('x-grid3-row-checker');
  }
}]
});

});

// Array data for the grids
Ext.grid.dummyData = [
['3m Co',71.72,0.02,0.03,'9/1 12:00am', 'Manufacturing'],
['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am', 'Manufacturing'],
['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am', 'Manufacturing'],
['American Express Company',52.55,0.01,0.02,'9/1 12:00am', 'Finance'],
['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am', 'Services'],
['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am', 'Services'],
['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am', 'Manufacturing'],
['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am', 'Services'],
['Citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am', 'Finance'],
['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am', 'Manufacturing'],
['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am', 'Manufacturing'],
['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am', 'Manufacturing'],
['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am', 'Automotive'],
['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am', 'Computer'],
['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am', 'Manufacturing'],
['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am', 'Computer'],
['International Business Machines',81.41,0.44,0.54,'9/1 12:00am', 'Computer'],
['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am', 'Medical'],
['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am', 'Finance'],
['McDonald\'s Corporation',36.76,0.86,2.40,'9/1 12:00am', 'Food'],
['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am', 'Medical'],
['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am', 'Computer'],
['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am', 'Services', 'Medical'],
['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am', 'Food'],
['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am', 'Retail'],
['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am', 'Manufacturing'],
['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am', 'Computer'],
['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am', 'Services'],
['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am', 'Retail'],
['Walt Disney Company (The) (Holding Company)',29.89,0.24,0.81,'9/1 12:00am', 'Services']
];

// add in some dummy descriptions
for(var i = 0; i < Ext.grid.dummyData.length; i++){
Ext.grid.dummyData[i].push('Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed metus nibh, sodales a, porta at, vulputate eget, dui. Pellentesque ut nisl. Maecenas tortor turpis, interdum non, sodales non, iaculis ac, lacus. Vestibulum auctor, tortor quis iaculis malesuada, libero lectus bibendum purus, sit amet tincidunt quam turpis vel lacus. In pellentesque nisl non sem. Suspendisse nunc sem, pretium eget, cursus a, fringilla vel, urna.

Aliquam commodo ullamcorper erat. Nullam vel justo in neque porttitor laoreet. Aenean lacus dui, consequat eu, adipiscing eget, nonummy non, nisi. Morbi nunc est, dignissim non, ornare sed, luctus eu, massa. Vivamus eget quam. Vivamus tincidunt diam nec urna. Curabitur velit.');
}[/code]