event.js

$(function() {
    $.fireEvent = function(name, data) {
        var deferred = $.Deferred(),
            callback = 'cb' + Math.random().toString(36).substring(7);

        if (data) {
            data.callBackFunc = callback;            
            data.callBack = callback;
            data.source = $.fireEvent.defaults.source;
        }

        window[callback] = function(data) {
            try {
                data = JSON.parse(data);
            } catch (e) {
                console.error('couldn\'t parse response');
            }
            deferred.resolve(data);
            delete window[callback];
        };      

        if ($.fireEvent.defaults.timeout) {
            setTimeout(function() {
                deferred.reject('timeout');
                delete window[callback];
            }, $.fireEvent.defaults.timeout);
        }

        Ti.App.fireEvent(name, data);

        return deferred;
    };

    $.fireEvent.defaults = {
        source: 'modal',
        timeout: 500
    };
});

Example:

$.fireEvent('searchPitcherFile', {keywords: 'System:HasFilters', rangeCheck: true})
    .done(console.info)
    .fail(console.error);
    .always(console.log);

noice