Better Declarative Listeners for ExtJS

gistfile1.js

/**
 * @author Jack Slocum
 * MIT License
 *
 * Adds support for "listens" config on components.
 * http://jackslocum.com/blog/listens/
 */
Ext.define('xui.mods.Listens', {
    override: 'Ext.Component',

    afterRender: function(){
        var ls = this.listens;
        if(typeof ls === 'object'){
            var qcache = {};
            for(var k in ls){
                if(ls.hasOwnProperty(k)){
                    var sels = k.split(/\s*,\s*/g),
                        fn = ls[k];
                    if(typeof fn === 'string'){
                        fn = this[fn];
                    }
                    for(var i = 0, len = sels.length; i < len; i++){
                        var ks = sels[i].split('@'),
                            query = ks[0],
                            c = qcache[query];

                        if(!c){
                            if(query === 'this'){
                                c = this;
                            } else {
                                var char = query.charAt(0);
                                if(char === '$'){
                                    c = Ext.getStore(query.substr(1));
                                } else if(char === '^'){
                                    c = this.up(query.substr(1));
                                } else {
                                    c = this.down(query);
                                }
                            }
                        }
                        if(!c){
                            throw new Error('Unable to attach listens event. Component not found: ' + query);
                        } else {
                            qcache[query] = c;
                        }

                        this.mon(c, ks[1], fn, this);
                    }
                }
            }
        }

        this.callOverridden();
    },

    onClassExtended: function(cls, data){
        var sc = cls.superclass,
            ls = data.listens;
        if(ls && sc.listens && data.inheritListens !== false){
            data.listens = Ext.apply({}, ls, sc.listens);
        }
    }
});

Hi, I have some few corrections to suggest especially using this in sencha touch 2

1. use: chr instead of char variable - this produce error in sencha build (reserve word collision)
2. use: initialize() instead afterRender() override - as deprecated
3. use: c.on(ks[1], fn, this) instead of this.mon(c, ks[1], fn, this) - as deprecated

Thank you very much for sharing this code.