- fix led toggle

Lib.Audio/Channel.cs

@@ -5,6 +5,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using Lib.Audio.Controls;
+using Lib.Audio.Controls.Buttons;
 using Lib.Audio.Controls.Buttons.Factories;
 using Lib.Audio.Controls.Buttons.Interfaces;
 using Lib.Audio.Controls.Factories;
@@ -50,9 +51,9 @@ namespace Lib.Audio
             if (xmlChannel.Knob != null)
                 Knob = knobFactory.Create();
 
+            Buttons = new List<IButton>();
             if (xmlChannel.Buttons != null)
             {
-                Buttons = new List<IButton>();
                 foreach (var button in xmlChannel.Buttons) 
                     Buttons.Add(buttonFactory.Create(button, _channelNumber));
             }
@@ -63,16 +64,19 @@ namespace Lib.Audio
 
         public IFader? Fader { get; }
         public IKnob? Knob { get; }
-        public List<IButton>? Buttons { get; }
+        public List<IButton> Buttons { get; }
         public IControllable? Controllable { get; private set; }
         
         public void MapControllable(IControllable controllable)
         {
             Controllable = controllable;
-            ToggleSelectButtonLed();
+            ToggleButtonLed<ISelectButton>(LedState.On);
+
+            if (!Controllable.IsValid)
+                return;
             
-            if (Controllable.IsValid)
+            InitializeFader();
-                InitializeFader();
+            ToggleButtonLed<IRecordButton>(LedState.On);
         }
 
         private void UnMapControllable()
@@ -80,7 +84,8 @@ namespace Lib.Audio
             if (Controllable == null)
                 return;
             
-            ToggleSelectButtonLed();
+            ToggleButtonLed<ISelectButton>(LedState.Off);
+            ToggleButtonLed<IRecordButton>(LedState.Off);
         }
 
         public void HandleMessage(IMidiMessage message)
@@ -91,8 +96,8 @@ namespace Lib.Audio
                     Fader.IsTouched = true;
                 else 
                 {
-                    IButton? button = Buttons?.FirstOrDefault(b => b.NoteNumber == noteOnMessage.NoteNumber);
+                    IButton? button = Buttons.FirstOrDefault(b => b.NoteNumber == noteOnMessage.NoteNumber);
-                    _acknowledgeMessage = button?.Handle(Controllable, (Velocity) noteOnMessage.Velocity);
+                    _acknowledgeMessage = button?.HandlePressed(Controllable, (Velocity) noteOnMessage.Velocity);
                 }
             }
             else if (message is NoteMessage noteMessage)
@@ -104,8 +109,8 @@ namespace Lib.Audio
                 }
                 else 
                 {
-                    IButton? button = Buttons?.FirstOrDefault(b => b.NoteNumber == noteMessage.NoteNumber);
+                    IButton? button = Buttons.FirstOrDefault(b => b.NoteNumber == noteMessage.NoteNumber);
-                    _acknowledgeMessage = button?.Handle(Controllable, (Velocity) noteMessage.Velocity);
+                    _acknowledgeMessage = button?.HandlePressed(Controllable, (Velocity) noteMessage.Velocity);
                 }
             }
             else if (message is PitchWheelChangeMessage pitchWheelChangeMessage)
@@ -135,10 +140,10 @@ namespace Lib.Audio
             _midiCommunication.Send(new PitchWheelChangeMessage(0, _channelNumber, Fader.Position));
         }
         
-        private void ToggleSelectButtonLed()
+        private void ToggleButtonLed<TButton>(LedState ledState) where TButton : IButton
         {
-            ISelectButton? selectButton = Buttons?.OfType<ISelectButton>().FirstOrDefault();
+            TButton? button = Buttons.OfType<TButton>().FirstOrDefault();
-            IMidiMessage? selectMessage = selectButton?.Select();
+            IMidiMessage? selectMessage = button?.ToggleLed(ledState);
             
             if (selectMessage != null)
                 _midiCommunication.Send(selectMessage);
@@ -161,8 +166,11 @@ namespace Lib.Audio
                 return;
 
             Controllable = _controllableCollector.GetControllableForExecutable(Controllable.ExecutablePath);
-            if (Controllable != null)
+            if (Controllable == null)
-                InitializeFader();
+                return;
+            
+            InitializeFader();
+            ToggleButtonLed<IRecordButton>(LedState.On);
         }
         
         private void OnProcessManagerProcessExited(object? sender, IObservedProcess process)
@@ -173,7 +181,8 @@ namespace Lib.Audio
             if (!Controllable.ExecutablePath.Equals(process.FileName))
                 return;
 
-            Controllable.IsValid = false; //TODO: Toggle Record button led
+            Controllable.IsValid = false;
+            ToggleButtonLed<IRecordButton>(LedState.Off);
         }
 
         public override string ToString() => $"Channel {_channelNumber}";
@@ -185,6 +194,9 @@ namespace Lib.Audio
             
             UnMapControllable();
             _midiCommunication.Send(new PitchWheelChangeMessage(0, _channelNumber, 0));
+
+            foreach (IMidiMessage ledOffMessage in Buttons.Select(b => b.ToggleLed(LedState.Off)))
+                _midiCommunication.Send(ledOffMessage);
         }
     }
 }

Lib.Audio/Controls/Buttons/Button.cs

@@ -22,21 +22,24 @@ namespace Lib.Audio.Controls.Buttons
         public int NoteNumber { get; }
         protected bool IsActive { get; private set; }
         
-        public virtual IMidiMessage? Handle(IControllable? controllable, Velocity velocity)
+        public virtual IMidiMessage? HandlePressed(IControllable? controllable, Velocity velocity)
         {
             if (velocity != Velocity.On)
                 return null;
             
             IsActive = !IsActive;
             Handle(controllable);
-            
+
-            return IsActive ? new NoteOnMessage(0, _channelNumber, NoteNumber, (int) Velocity.On, 0)
+            return IsActive ? LedOn() : LedOff();
-                : new NoteMessage(0, _channelNumber, NoteNumber, (int) Velocity.Off);
         }
 
+        public IMidiMessage ToggleLed(LedState ledState) => ledState == LedState.Off ? LedOff() : LedOn();
         protected virtual void Handle(IControllable? controllable)
         {
             
         }
+
+        private IMidiMessage LedOn() => new NoteOnMessage(0, _channelNumber, NoteNumber, (int) Velocity.On, 0);
+        private IMidiMessage LedOff() => new NoteMessage(0, _channelNumber, NoteNumber, (int) Velocity.Off);
     }
 }

Lib.Audio/Controls/Buttons/Interfaces/IButton.cs

@@ -11,6 +11,7 @@ namespace Lib.Audio.Controls.Buttons.Interfaces
     {
         int NoteNumber { get; }
 
-        IMidiMessage? Handle(IControllable? controllable, Velocity velocity);
+        IMidiMessage? HandlePressed(IControllable? controllable, Velocity velocity);
+        IMidiMessage ToggleLed(LedState ledState);
     }
 }

Lib.Audio/Controls/Buttons/Interfaces/IRecordButton.cs

@@ -2,12 +2,10 @@
 // Created: 2021-04-26
 // Copyright(c) 2021 SimonG. All Rights Reserved.
 
-using Lib.Midi.Messages.Interfaces;
-
 namespace Lib.Audio.Controls.Buttons.Interfaces
 {
     public interface IRecordButton : IButton
     {
-        IMidiMessage? Record();
+        
     }
 }

Lib.Audio/Controls/Buttons/Interfaces/ISelectButton.cs

@@ -2,12 +2,10 @@
 // Created: 2021-04-17
 // Copyright(c) 2021 SimonG. All Rights Reserved.
 
-using Lib.Midi.Messages.Interfaces;
-
 namespace Lib.Audio.Controls.Buttons.Interfaces
 {
     public interface ISelectButton : IButton
     {
-        IMidiMessage? Select();
+        
     }
 }

Lib.Audio/Controls/Buttons/LedState.cs

@@ -0,0 +1,12 @@
+// Author: Gockner, Simon
+// Created: 2021-04-26
+// Copyright(c) 2021 SimonG. All Rights Reserved.
+
+namespace Lib.Audio.Controls.Buttons
+{
+    public enum LedState
+    {
+        Off,
+        On
+    }
+}

Lib.Audio/Controls/Buttons/RecordButton.cs

@@ -16,7 +16,6 @@ namespace Lib.Audio.Controls.Buttons
             
         }
 
-        public override IMidiMessage? Handle(IControllable? controllable, Velocity velocity) => null; //for now don't do anything when pressed
+        public override IMidiMessage? HandlePressed(IControllable? controllable, Velocity velocity) => null; //for now don't do anything when pressed
-        public IMidiMessage? Record() => base.Handle(null, Velocity.On);
     }
 }

Lib.Audio/Controls/Buttons/SelectButton.cs

@@ -16,7 +16,6 @@ namespace Lib.Audio.Controls.Buttons
             
         }
 
-        public override IMidiMessage? Handle(IControllable? controllable, Velocity velocity) => null; //for now don't do anything when pressed
+        public override IMidiMessage? HandlePressed(IControllable? controllable, Velocity velocity) => null; //for now don't do anything when pressed
-        public IMidiMessage? Select() => base.Handle(null, Velocity.On);
     }
 }