如何将onfocus事件处理程序附加到extJS网格中的行？

Ext.create('Ext.grid.Panel', {
    title: 'Simpsons',
    store: Ext.data.StoreManager.lookup('simpsonsStore'),
    columns: [
        { header: 'Name',  dataIndex: 'name' },
        { header: 'Email', dataIndex: 'email', flex: 1 },
        { header: 'Phone', dataIndex: 'phone' }
    ],
    listeners: {
        cellfocus: function(grid, td, cellIndex, record, tr, rowIndex, e, eOpts) {
            // 在这里编写您的事件处理程序
            console.log('Cell focused:', cellIndex, record);
        }
    },
    renderTo: Ext.getBody()
});

Ext.create('Ext.grid.Panel', {
    title: 'Simpsons',
    store: Ext.data.StoreManager.lookup('simpsonsStore'),
    columns: [
        { header: 'Name',  dataIndex: 'name' },
        { header: 'Email', dataIndex: 'email', flex: 1 },
        { header: 'Phone', dataIndex: 'phone' }
    ],
    viewConfig: {
        listeners: {
            focus: function(grid, record, item, index, e, eOpts) {
                // 在这里编写您的事件处理程序
                console.log('Cell focused:', index, record);
            }
        }
    },
    renderTo: Ext.getBody()
});