Clear _waveSource and PlayedFile if last file was removed

FModel/ViewModels/AudioPlayerViewModel.cs

@@ -238,6 +238,20 @@ public class AudioPlayerViewModel : ViewModel, ISource, IDisposable
         });
     }
 
+    public void Unload()
+    {
+        Application.Current.Dispatcher.Invoke(() =>
+        {
+            _waveSource = null;
+
+            PlayedFile = new AudioFile(-1, "No audio file");
+            Spectrum = null;
+
+            RaiseSourceEvent(ESourceEventType.Clearing);
+            ClearSoundOut();
+        });
+    }
+
     public void AddToPlaylist(byte[] data, string filePath)
     {
         Application.Current.Dispatcher.Invoke(() =>
@@ -274,6 +288,18 @@ public class AudioPlayerViewModel : ViewModel, ISource, IDisposable
             {
                 _audioFiles[i].Id = i;
             }
+
+            if (_audioFiles.Count < 1)
+            {
+                Unload();
+                return;
+            }
+
+            SelectedAudioFile = _audioFiles[SelectedAudioFile.Id];
+
+            if (!removedPlaying) return;
+            Load();
+            Play();
         });
     }
 
@@ -525,6 +551,11 @@ public class AudioPlayerViewModel : ViewModel, ISource, IDisposable
         _soundOut.Volume = UserSettings.Default.AudioPlayerVolume / 100;
     }
 
+    private void ClearSoundOut()
+    {
+        _soundOut = null;
+    }
+
     private IEnumerable<MMDevice> EnumerateDevices()
     {
         using var deviceEnumerator = new MMDeviceEnumerator();

FModel/Views/Resources/Controls/Aup/SourceEventArgs.cs

@@ -4,7 +4,8 @@ namespace FModel.Views.Resources.Controls.Aup;
 
 public enum ESourceEventType
 {
-    Loading
+    Loading,
+    Clearing
 }
 
 public class SourceEventArgs : EventArgs
@@ -15,4 +16,4 @@ public class SourceEventArgs : EventArgs
     {
         Event = e;
     }
-}
+}