Add support for automatic layer revert

Configurations/config.json

@@ -20,5 +20,6 @@
       "type": "Bool",
       "writable": false
     }
-  ]
+  ],
+  "automatic_layer_revert": 3.0
 }

activelayer.py

@@ -12,13 +12,16 @@ class ActiveLayer(metaclass=Singleton):
     def __init__(self):
         self._active_layer = ActiveLayerIdentifier.A
         self._layer_change_events = []
+        self._activity_events = []
 
     @property
     def active_layer(self):
         return self._active_layer
 
     @active_layer.setter
     def active_layer(self, value: ActiveLayerIdentifier):
+        for x in self._activity_events:
+            x(value)
         if value != self._active_layer:
             print("Layer Change to", value)
             for x in self._layer_change_events:
@@ -27,3 +30,6 @@ def active_layer(self, value: ActiveLayerIdentifier):
 
     def subscribe_to_layer_change(self, callback):
         self._layer_change_events.append(callback)
+
+    def subscribe_to_activity(self, callback):
+        self._activity_events.append(callback)

activelayerchanger.py

@@ -0,0 +1,70 @@
+from threading import Timer
+import mido
+import time
+
+from singleton import Singleton
+from activelayer import ActiveLayer, ActiveLayerIdentifier
+
+
+class RepeatedTimer(object):
+    def __init__(self, interval, function, *args, **kwargs):
+        self._timer = None
+        self.interval = interval
+        self.function = function
+        self.args = args
+        self.kwargs = kwargs
+        self.is_running = False
+
+    def _run(self):
+        self.is_running = False
+        self.start()
+        self.function(*self.args, **self.kwargs)
+
+    def start(self):
+        if not self.is_running:
+            self._timer = Timer(self.interval, self._run)
+            self._timer.start()
+            self.is_running = True
+
+    def stop(self):
+        self._timer.cancel()
+        self.is_running = False
+
+
+class ActiveLayerChanger:
+    def __init__(self, outport: mido.ports.BaseOutput):
+        self._timer = None
+        self._layer_revert_interval = 0.0
+        self._outport = outport
+        self._time_of_last_activity = time.time()
+        ActiveLayer().subscribe_to_layer_change(self._on_layer_change)
+        ActiveLayer().subscribe_to_activity(self._on_activity)
+
+    def set_active_layer(self, newlayer: ActiveLayerIdentifier):
+        if newlayer == ActiveLayerIdentifier.A:
+            msg = mido.Message('program_change', program=0)
+        else:
+            msg = mido.Message('program_change', program=1)
+        self._outport.send(msg)
+        ActiveLayer().active_layer = newlayer
+
+    def enable_layer_revert_timer(self, interval: float):
+        self._time_of_last_activity = time.time()
+        self._timer = RepeatedTimer(0.1, self._layer_revert_timer_event)
+        self._layer_revert_interval = interval
+
+    def _on_layer_change(self, newlayer):
+        if self._timer:
+            if newlayer == ActiveLayerIdentifier.B:
+                self._timer.start()
+            else:
+                self._timer.stop()
+
+    def _on_activity(self, layer):
+        self._time_of_last_activity = time.time()
+
+    def _layer_revert_timer_event(self):
+        current_time = time.time()
+        if current_time - self._time_of_last_activity > self._layer_revert_interval:
+            print("Automatic change to layer A")
+            self.set_active_layer(ActiveLayerIdentifier.A)

configfile.py

@@ -27,6 +27,8 @@ def configure(self):
                 if aircraft_contains in str(self._aircraft):
                     config_file = file
             self._configure_additional_simvars(base_data)
+            if 'automatic_layer_revert' in base_data:
+                GlobalStorage().active_layer_changer.enable_layer_revert_timer(base_data['automatic_layer_revert'])
 
             config_file = 'Configurations/' + config_file  # Add folder prefix
             print("Loading config file:", config_file)

globalstorage.py

@@ -7,6 +7,7 @@
 from pushbutton import PushButton
 from trigger import Trigger
 from fader import Fader
+from activelayerchanger import ActiveLayerChanger
 
 
 class GlobalStorage(metaclass=Singleton):
@@ -18,12 +19,14 @@ def __init__(self):
         self._ae = None
         self._aq = None
         self._global_variables = {}
+        self._active_layer_changer = None  # type: ActiveLayerChanger
 
     def clear(self):
         self._buttons = []
         self._encoders = []
         self._faders = []
         self._triggers = []
+        self._active_layer_changer = None
 
     def add_encoder(self, encoder: RotaryEncoder):
         self._encoders.append(encoder)
@@ -49,6 +52,9 @@ def set_global_variable(self, key: str, value):
     def get_global_variable(self, key: str):
         return self._global_variables.get(key, None)
 
+    def set_active_layer_changer(self, ac: ActiveLayerChanger):
+        self._active_layer_changer = ac
+
     @property
     def encoders(self) -> List[RotaryEncoder]:
         return self._encoders
@@ -76,3 +82,7 @@ def aircraft_events(self) -> AircraftEvents:
     @property
     def aircraft_requests(self) -> AircraftRequests:
         return self._aq
+
+    @property
+    def active_layer_changer(self) -> ActiveLayerChanger:
+        return self._active_layer_changer

main.py

@@ -9,6 +9,7 @@
 from configfile import ConfigFile
 from globalstorage import GlobalStorage
 from mocksimconnect import MockAircraftEvents, MockAircraftRequests
+from activelayerchanger import ActiveLayerChanger
 
 
 def main_app(offline: bool):
@@ -23,6 +24,8 @@ def main_app(offline: bool):
         global_storage.set_aircraft_events(ae)
         global_storage.set_aircraft_requests(aq)
     else:
+        aq = MockAircraftRequests()
+        ae = MockAircraftEvents()
         global_storage.set_aircraft_events(MockAircraftEvents())
         global_storage.set_aircraft_requests(MockAircraftRequests())
 
@@ -66,6 +69,8 @@ def handle_message(msg: mido.Message):
         fader = Fader(f)
         global_storage.add_fader(fader)
 
+    GlobalStorage().set_active_layer_changer(ActiveLayerChanger(outport))
+
     c = ConfigFile(aircraft)
     c.configure()
     triggers = c.triggers