Extjsgridpanel出现横向滚动条问题的解决方法

viewConfig:{
layout:function(){
if(!this.mainBody){
return;//notrendered
}
varg=this.grid;
varc=g.getGridEl();
varcsize=c.getSize(true);
varvw=csize.width;
if(!g.hideHeaders&&(vw<20||csize.height<20)){//display:
//none?
return;
}
if(g.autoHeight){
if(this.innerHd){
this.innerHd.style.width=(vw)+"px";
}
}else{
this.el.setSize(csize.width,csize.height);
varhdHeight=this.mainHd.getHeight();
varvh=csize.height-(hdHeight);
this.scroller.setSize(vw,vh);
if(this.innerHd){
this.innerHd.style.width=(vw)+"px";
}
}
if(this.forceFit){
if(this.lastViewWidth!=vw){
this.fitColumns(false,false);
this.lastViewWidth=vw;
}
}else{
this.autoExpand();
this.syncHeaderScroll();
}
this.onLayout(vw,vh);
}
}