Extjs 中 TablPanel contextmenu 事件

      最近学了下Extjs,感觉十分痛苦。特加是有些API不全，一个小问题弄半天弄不出来。今天遇到一个TabPanel的右键菜单的问题，本想做一个点右键关闭当前选项卡和其它的菜单，结果在TablePanel listerners一的事件里面写的如下代码。

Code
listeners:{
                    contextmenu:function(t,cur,e){
                        if(!this.cmenu){
                            this.cmenu=new Ext.menu.Menu({                                
                                items:[{
                                    id:tab.id+'-close',
                                    text:'Close',
                                    handler:function(){                                        
                                        tab.remove(cur);
                                    }
                                },{
                                    text:'Close Other'
                                },{
                                    text:'Close All'
                                }]
                            })
                        }
                        e.stopEvent();
                        this.cmenu.showAt(e.getPoint());
                    }
                }

      结果发现在怎么都不行，每次只能关闭一次，每二次就不行了。最后查了半天，在网上找了很久也没找到。郁闷之及。还是在它的API文档里面发现有类似的。看了它的代码后改造了下

Code
cmenu:false,
                ctxItem:false,
                listeners:{
                    contextmenu:function(t,cur,e){
                        if(!this.cmenu){
                            this.cmenu=new Ext.menu.Menu({                                
                                items:[{
                                    id:tab.id+'-close',
                                    text:'Close',
                                    handler:function(){                                        
                                        tab.remove(tab.ctxItem);
                                    }
                                },{
                                    text:'Close Other'
                                },{
                                    text:'Close All'
                                }]
                            })
                        }
                        e.stopEvent();
                        tab.ctxItem=cur;
                        this.cmenu.showAt(e.getPoint());
                    }
                }

 

这下才行，我发现在TabPanel的contextmenu事件有点小猫腻，每二个参数说的是传的当前的tab结果在colse里面得不到。还是你每下次点击的那个tab，所以要设置一个全局的变量来保存。这里我用的是ctxItem。希望以后谁遇到这个问题能好些。