99 lines
2.4 KiB
Text
99 lines
2.4 KiB
Text
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#
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# Emesary interface to access nav data such as airport information, fixes etc.
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#
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var NavDataInterface = {
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new : func (device)
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{
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var obj = { parents : [ NavDataInterface ] };
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# Emesary
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obj._recipient = nil;
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obj._transmitter = emesary.GlobalTransmitter;
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obj._registered = 0;
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obj._device = device;
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return obj;
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},
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# Find the airports within 200nm and return them.
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getNearestAirports : func()
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{
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# To make this more efficient for areas with a high density of airports, we'll try
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# a small radius first and expand until we have reached 200nm or have 25 airports.
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var radius = 0;
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var apts = [];
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while ((radius <= 200) and (size(apts) < 25)) {
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radius = radius + 50;
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apts = findAirportsWithinRange(radius);
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}
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if (size(apts) > 25) {
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apts = subvec(apts, 0, 25);
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}
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return apts;
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},
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# Find a specific airport by ID
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getAirportById : func(id)
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{
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var apt = airportinfo(id);
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return apt;
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},
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RegisterWithEmesary : func()
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{
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if (me._recipient == nil){
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me._recipient = emesary.Recipient.new("DataInterface");
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var pfd_obj = me._device;
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var controller = me;
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me._recipient.Receive = func(notification)
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{
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if (notification.Device_Id == pfd_obj.device_id
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and notification.NotificationType == notifications.PFDEventNotification.DefaultType) {
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if (notification.Event_Id == notifications.PFDEventNotification.NavData
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and notification.EventParameter != nil)
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{
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var id = notification.EventParameter.Id;
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if (id == "NearestAirports") {
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notification.EventParameter.Value = controller.getNearestAirports();
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return emesary.Transmitter.ReceiptStatus_Finished;
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}
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if (id == "AirportByID") {
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var apt = controller.getAirportById(notification.EventParameter.Value);
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notification.EventParameter.Value = apt;
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return emesary.Transmitter.ReceiptStatus_Finished;
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}
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}
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}
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return emesary.Transmitter.ReceiptStatus_NotProcessed;
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};
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}
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me._transmitter.Register(me._recipient);
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me._registered = 1;
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},
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DeRegisterWithEmesary : func()
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{
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# remove registration from transmitter; but keep the recipient once it is created.
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if (me._registered == 1) me._transmitter.DeRegister(me._recipient);
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me._registered = 0;
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},
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start : func() {
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me.RegisterWithEmesary();
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},
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stop : func() {
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me.DeRegisterWithEmesary();
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},
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};
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