/*!
 * Ext JS Library 3.3.1
 * Copyright(c) 2006-2010 Sencha Inc.
 * licensing@sencha.com
 * http://www.sencha.com/license
 */
(function() {
    Ext.override(Ext.list.Column, {
        init : function() {    
            var types = Ext.data.Types,
                st = this.sortType;
                    
            if(this.type){
                if(Ext.isString(this.type)){
                    this.type = Ext.data.Types[this.type.toUpperCase()] || types.AUTO;
                }
            }else{
                this.type = types.AUTO;
            }

            // named sortTypes are supported, here we look them up
            if(Ext.isString(st)){
                this.sortType = Ext.data.SortTypes[st];
            }else if(Ext.isEmpty(st)){
                this.sortType = this.type.sortType;
            }
        }
    });

    Ext.tree.Column = Ext.extend(Ext.list.Column, {});
    Ext.tree.NumberColumn = Ext.extend(Ext.list.NumberColumn, {});
    Ext.tree.DateColumn = Ext.extend(Ext.list.DateColumn, {});
    Ext.tree.BooleanColumn = Ext.extend(Ext.list.BooleanColumn, {});

    Ext.reg('tgcolumn', Ext.tree.Column);
    Ext.reg('tgnumbercolumn', Ext.tree.NumberColumn);
    Ext.reg('tgdatecolumn', Ext.tree.DateColumn);
    Ext.reg('tgbooleancolumn', Ext.tree.BooleanColumn);
})();
