# Class things:
var parents = [Map.Controller];
var __self__ = caller(0)[0];
Map.Controller.add("Aircraft position", __self__);
#Map.df_controller = __self__;
var new = func(map) {
	var m = {
		parents: [__self__],
		map: map,
		_pos: nil, _time: nil,
	};
	m.timer = maketimer(0, m, update_pos);
	m.timer.start();
	return m;
};
var del = func(map) {
	if (map != me.map) die();
	me.timer.stop();
};

# Controller methods
var update_pos = func {
	var (lat,lon) = (var pos = geo.aircraft_position()).latlon();
	var time = systime();
	me.map.setPos(lat, lon, getprop("/orientation/heading-deg"));
	if (me._pos == nil)
		me._pos = geo.Coord.new(pos);
	else {
		var dist = me._pos.direct_distance_to(pos);
		# 2 NM until we update again
		if (dist < 2 * NM2M) return;
		# Update at most every 4 seconds to avoid escessive stutter:
		elsif (time - me._time < 4) return;
	}
	#print("update aircraft position");
	var (x,y,z) = pos.xyz();
	me._pos.set_xyz(x,y,z);
	me._time = time;
	me.map.update();
};