var xpdr_digits = 1;

var xpdr_id_timer = 0;

var tofromflag = nil;

var radios_list = [

    '/instrumentation/nav/frequencies/standby-mhz',

    '/instrumentation/nav[1]/frequencies/standby-mhz',

    '/instrumentation/nav/frequencies/selected-mhz',

    '/instrumentation/nav[1]/frequencies/selected-mhz',

    '/instrumentation/comm/frequencies/standby-mhz',

    '/instrumentation/comm[1]/frequencies/standby-mhz',

    '/instrumentation/comm/frequencies/selected-mhz',

    '/instrumentation/comm[1]/frequencies/selected-mhz',

];

var setNavTune = func {

    var freq = radios.getNode('nav-freq-mhz', 1);

    freq.unalias();

    freq.alias(radios_list[radios.getValue('nav-tune')]);

}

var setCommTune = func {

    var freq = radios.getNode('comm-freq-mhz', 1);

    freq.unalias();

    freq.alias(radios_list[radios.getValue('comm-tune') + 4]);

}

var aliases = {

    NAV : {

        'in-range' : 'in-range',

        'course'   : 'radials/selected-deg',

        'course-deflection' : 'heading-needle-deflection',

        'FROM-flag' : 'from-flag',

        'TO-flag' : 'to-flag',

        'radial' : 'radials/reciprocal-radial-deg',

    },

    GPS : {

        'course' : 'desired-course-deg',

        'course-deflection' : 'wp/wp[1]/course-error-nm',

        'FROM-flag': 'wp/wp[1]/from-flag',

        'TO-flag': 'wp/wp[1]/to-flag',

    }

};

var CDIfromSOURCE = func (source) {

    if (source == 'OFF') {

# all the aliases of GPS are included in NAV too

        foreach (var a; keys(aliases['NAV']))

            cdi.getNode(a).unalias();

    }

    else {

        var s = (source == 'GPS') ? 'gps' : 'nav[' ~ (right(source, 1) - 1) ~ ']';

        foreach (var a; keys(aliases[left(source, 3)])) {

            cdi.getNode(a).unalias();

            cdi.getNode(a).alias('/instrumentation/' ~ s ~ '/' ~ aliases[left(source, 3)][a]);

        }

    }

}

foreach (var r; radios_list) props.globals.getNode(r ~ '-dec',1).setIntValue(0);