# See: http://wiki.flightgear.org/MapStructure
# Class things:
var name = 'WXR_live';
var parents = [canvas.SymbolLayer.Controller];
var __self__ = caller(0)[0];

canvas.SymbolLayer.Controller.add(name, __self__);
canvas.SymbolLayer.add(name, {
	parents: [MultiSymbolLayer],
	type: name, # Symbol type
	df_controller: __self__, # controller to use by default -- this one
	df_options: { # default configuration options
		viewport_radius: 670
	}
});

var wxr_tree = "/instrumentation/wxr";

var new = func(layer) {
	var m = {
		parents: [__self__],
		layer: layer,
		map: layer.map,
		listeners: [],
	};
	layer.searcher._equals = func(l,r) l.equals(r);
	m.addVisibilityListener();
	return m;
};

var del = func() {
	#print(name~".lcontroller.del()");
	foreach (var l; me.listeners)
		removelistener(l);
};

var searchCmd  = func {
	if(me.map.getRange() == nil) return [];
	var lat = getprop(wxr_tree~"/center/latitude-deg");
	var lon = getprop(wxr_tree~"/center/longitude-deg");
	
	if(lat == nil or lon == nil) {
		var pos = geo.aircraft_position();
		lat = pos.lat();
		lon = pos.lon();
	}
	
	var result = geo.Coord.new();
	result.set_latlon(lat, lon);
	result.rangeNm = me.map.getRange();
	result.fetchRad = 184; # is this number accurate?
	result.equals = func(r){
		me.fetchRad == r.fetchRad and me.lat == r.lat and me.lon == r.lon
	};
	
	return [result];
};