fgdata/Nasal/canvas/map/VOR.lcontroller

# Class things:
var parents = [SymbolLayer.Controller];
var __self__ = caller(0)[0];
SymbolLayer.Controller.add("VOR", __self__);
SymbolLayer.add("VOR", {
	parents: [SymbolLayer],
	type: "VOR", # Symbol type
	df_controller: __self__, # controller to use by default -- this one
});
var a_instance = nil;
var new = func(layer) {
	var m = {
		parents: [__self__],
		layer: layer,
		active_vors: [],
		navNs: props.globals.getNode("instrumentation").getChildren("nav"),
		listeners: [],
		query_type:'vor',
	};
	setsize(m.active_vors, size(m.navNs));
	foreach (var navN; m.navNs) {
		append(m.listeners, setlistener(
			navN.getNode("frequencies/selected-mhz"),
			func m.changed_freq()
		));
	}
	#call(debug.dump, keys(layer));
	m.changed_freq(update:0);
	__self__.a_instance = m;
	return m;
};
var del = func() {
	#print("VOR.lcontroller.del()");
	foreach (var l; me.listeners)
		removelistener(l);
};

# Controller methods
var isActive = func(model) {
	var my_freq = model.frequency/100;
	foreach (var freq; me.active_vors)
		if (freq == my_freq) return 1;
	return 0;
};
var changed_freq = func(update=1) {
	#debug.dump(me.active_vors);
	foreach (var navN; me.navNs)
		me.active_vors[ navN.getIndex() ] = navN.getValue("frequencies/selected-mhz");
	if (update) me.layer.update();
};
var searchCmd = func {
	#print("Running query:", me.query_type);
	return positioned.findWithinRange(100, me.query_type); # the range should also be exposed, it will typically be controlled via a GUI widget or NavDisplay switch
};