ExtJS4 grid单元格添加复选框

效果图：

//添加复选框

var deal = function(grid){
//获取视图行数
var rows = grid[0].getView().getStore().totalCount;
//获取视图列数
var cols = grid[0].columns.length;
//遍历节点
for(var i = 0; i < rows; i++){
for(var j = 0; j < cols; j++){
//获取节点
var node = Ext.get(Ext.get(grid[0].view.getNode(i)).query('td')[j]);
var e = node.dom.firstChild;
//为节点重新赋值
e.innerHTML =e.innerHTML + '<br><input type="checkbox"/>';
}
}

};