Extjs3.x版本 选择复制

step1：

在引入css  添加

.x-selectable, .x-selectable * {   
    user-select: text! important;  
    -o-user-select: text! important;  
    -moz-user-select: text! important;  
    -khtml-user-select: text! important;  
    -webkit-user-select: text! important;  
}  

step2

添加JS

if(!Ext.grid.GridView.prototype.templates) {      
    Ext.grid.GridView.prototype.templates = {};      
}      
Ext.grid.GridView.prototype.templates.cell =  new  Ext.Template(      
     '<td class="x-grid3-col x-grid3-cell x-grid3-td-{id} x-selectable {css}" style="{style}" tabIndex="0" {cellAttr}>' ,      
     '<div class="x-grid3-cell-inner x-grid3-col-{id}" {attr}>{value}</div>' ,      
     '</td>'      
);   

Ext.grid.GridView.prototype.cellTpl = new Ext.Template(Ext.grid.GridView.prototype.cellTpl.html  
        .replace('unselectable="on"', '').replace('class="','class="x-selectable '))