settings: add setting for M-Key LEDs

lib/logitech_receiver/settings_templates.py

@@ -986,6 +986,33 @@ class Gesture2Params(_LongSettings):
             return cls(items, sub_items)
 
 
+class MKeyLEDs(_BitFieldSetting):
+    name = 'm-key-leds'
+    label = _('M-Key LEDs')
+    description = _('Control the M-Key LEDs.')
+    feature = _F.MKEYS
+    choices_universe = _NamedInts()
+    for i in range(8):
+        choices_universe[1 << i] = 'M' + str(i + 1)
+    _labels = {k: (None, _('Lights up the %s key.') % k) for k in choices_universe}
+    print('MKEYS CHOICES UNIVERSE', choices_universe, _labels)
+
+    class rw_class(_FeatureRW):
+        def __init__(self, feature):
+            super().__init__(feature, write_fnid=0x10)
+
+        def read(self, device):  # no way to read, so just assume off
+            return b'\x00'
+
+    class validator_class(_BitFieldV):
+        @classmethod
+        def build(cls, setting_class, device):
+            number = device.feature_request(setting_class.feature, 0x00)[0]
+            options = [setting_class.choices_universe[1 << i] for i in range(number)]
+            print('NUMBER OF MKEYS', number, options)
+            return cls(options) if options else None
+
+
 SETTINGS = [
     RegisterHandDetection,  # simple
     RegisterSmoothScroll,  # simple
@@ -1015,7 +1042,8 @@ SETTINGS = [
     DisableKeyboardKeys,  # working
     DivertCrown,  # working
     CrownSmooth,  # working
-    DivertGkeys,
+    DivertGkeys,  # working
+    MKeyLEDs,
     Multiplatform,  # working
     DualPlatform,  # simple
     ChangeHost,  # working