Ext.grid.GridView.override({
    renderRows : function(startRow, endRow){
        // pull in all the crap needed to render rows
        var g = this.grid, cm = g.colModel, ds = g.store, stripe = g.stripeRows;
        var colCount = cm.getColumnCount();

        if(ds.getCount() < 1){
            return '<div><div style="width:'+this.getTotalWidth()+';">&nbsp;</div></div>';
        }

        var cs = this.getColumnData();

        startRow = startRow || 0;
        endRow = typeof endRow == "undefined"? ds.getCount()-1 : endRow;

        // records to render
        var rs = ds.getRange(startRow, endRow);

        return this.doRender(cs, rs, ds, startRow, colCount, stripe);
    },
    updateColumnWidth : function(col, width){
        var w = this.getColumnWidth(col);
        var tw = this.getTotalWidth();

        this.innerHd.firstChild.firstChild.style.width = tw;
        var hd = this.getHeaderCell(col);
        hd.style.width = w;

        var ns = this.getRows();
        for(var i = 0, len = ns.length; i < len; i++){
            ns[i].style.width = tw;
            ns[i].firstChild.style.width = tw;
            if(ns[i].firstChild.rows){
                ns[i].firstChild.rows[0].childNodes[col].style.width = w;
            }else{
                break;
            }
        }

        this.onColumnWidthUpdated(col, w, tw);
    },
    updateColumnHidden : function(col, hidden){
        var tw = this.getTotalWidth();

        this.innerHd.firstChild.firstChild.style.width = tw;

        var display = hidden ? 'none' : '';

        var hd = this.getHeaderCell(col);
        hd.style.display = display;

        var ns = this.getRows();
        for(var i = 0, len = ns.length; i < len; i++){
            ns[i].style.width = tw;
            ns[i].firstChild.style.width = tw;
            if(ns[i].firstChild.rows){
                ns[i].firstChild.rows[0].childNodes[col].style.display = display;
            }else{
                break;
            }
        }

        this.onColumnHiddenUpdated(col, hidden, tw);

        delete this.lastViewWidth; // force recalc
        this.layout();
    }
});