fgdata/Nasal/canvas/map/VOR.lcontroller

# See: http://wiki.flightgear.org/MapStructure
# Class things:
var name ='VOR';
var parents = [SymbolLayer.Controller];
var __self__ = caller(0)[0];
SymbolLayer.Controller.add(name, __self__);
SymbolLayer.add(name, {
	parents: [SymbolLayer],
	type: name, # Symbol type
	df_controller: __self__, # controller to use by default -- this one
});
var new = func(layer) {

if(0) {
	# TODO: generalize and move to MapStructure.nas
	var required_controllers = [ {name: 'query_range',type:'func'}, ];
	foreach(var c; required_controllers) {
		if (!contains(layer.map.controller, c.name) or typeof(layer.map.controller[c.name]) !=c.type)
		die("Required controller is missing/invalid:"~ c.name ~ ' ['~c.type~']' );
	}
}
	
	var m = {
		parents: [__self__],
		layer: layer,
		map: layer.map,
		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);
	return m;
};
var del = func() {
	printlog(_MP_dbg_lvl, name,".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 {
	printlog(_MP_dbg_lvl, "Running query:", me.query_type);
	var range = me.map.getRange();
	if (range == nil) return;
	return positioned.findWithinRange(me.map.getPosCoord(), range, me.query_type);
};