Hi, all

I have a problem with checkColumn.
the default state is supposed to disable checkColumn.
then after making selection in combobox with value 'backlog', this should enable checkColumn.

I've tried to use this.
http://www.sencha.com/forum/showthre...sable&langid=1
Code:
// CHECKBOX
Ext.grid.CheckColumn = function(config){
    Ext.apply(this, config);
    if(!this.id){
        this.id = Ext.id();
    }
    this.renderer = this.renderer.createDelegate(this);
};

Ext.grid.CheckColumn.prototype = {
    init : function(grid){
        this.grid = grid;
        this.grid.on('render', function(){
            var view = this.grid.getView();
            view.mainBody.on('mousedown', this.onMouseDown, this);
        }, this);
    },

    onMouseDown : function(e, t){
    if(this.readonly == false){
            if(t.className && t.className.indexOf('x-grid3-cc-'+this.id) != -1){
                e.stopEvent();
                var index = this.grid.getView().findRowIndex(t);
                var record = this.grid.store.getAt(index);
                record.set(this.dataIndex, !record.data[this.dataIndex]);
            }
    }
    },

    renderer : function(v, p, record){
        p.css += ' x-grid3-check-col-td'; 
        return '<div class="x-grid3-check-col'+(v?'-on':'')+' x-grid3-cc-'+this.id+'">&#160;</div>';
    }
};
I managed to disable checkColumn, but I do not know how to make it enabled.

can someone help me,..
pleaseee..