ExtJS4.2 Grid組件裏面表頭的寬度和數據列的寬度不壹致

getTotalWidth:?function(includeHidden)?{?

var?off?=?0;?

if?(Ext.isChrome){?

off?=?2;?

};?

if?(!this.totalWidth)?{?

this.totalWidth?=?0;?

for?(var?i?=?0,?len?=?this.config.length;?i?<?len;?i++)?{?

if?(includeHidden?||?!this.isHidden(i))?{?

this.totalWidth?+=?this.getColumnWidth(i)+off;?

};?

};?

};?

return?this.totalWidth;?

}?

});