Adding initial playback bar logic.

Harmonia.UI/ViewModels/PlaybackBarViewModel.cs

@@ -1,10 +1,14 @@
-using Avalonia.Media.Imaging;
+using Avalonia.Controls;
+using Avalonia.Media.Imaging;
 using Avalonia.Threading;
 using Harmonia.Core.Caching;
 using Harmonia.Core.Imaging;
 using Harmonia.Core.Models;
 using Harmonia.Core.Player;
+using Harmonia.Core.Playlists;
+using Harmonia.Core.Scanner;
 using System;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -14,8 +18,8 @@ public partial class PlaybackBarViewModel : ViewModelBase
 {
     private readonly IAudioPlayer _audioPlayer;
     private readonly IAudioImageCache _audioImageCache;
+    private readonly DispatcherTimer _timer;
 
-    private bool _isPositionChangeInProgress;
     private CancellationTokenSource? _audioImageCancellationTokenSource;
 
     private Song? _song;
@@ -95,6 +99,17 @@ public partial class PlaybackBarViewModel : ViewModelBase
         }
     }
 
+    private bool _isPositionChangeInProgress;
+    public bool IsPositionChangeInProgress
+    {
+        get { return _isPositionChangeInProgress; }
+        set
+        {
+            _isPositionChangeInProgress = value;
+            OnPropertyChanged();
+        }
+    }
+
     public bool IsRandom
     {
         get
@@ -110,12 +125,14 @@ public partial class PlaybackBarViewModel : ViewModelBase
 
     public string Greeting => "Welcome to Harmonia!";
 
-    public PlaybackBarViewModel(IAudioPlayer audioPlayer, IAudioImageCache audioImageCache)
+    public PlaybackBarViewModel(IAudioPlayer audioPlayer, IAudioImageCache audioImageCache, IPlaylistRepository playlistRepository, IAudioFileScanner audioFileScanner)
     {
         _audioPlayer = audioPlayer;
         _audioPlayer.PlayingSongChanged += OnAudioPlayerPlayingSongChanged;
 
         _audioImageCache = audioImageCache;
+
+        _timer = new(TimeSpan.FromMilliseconds(100), DispatcherPriority.Default, TickTock);
     }
 
     private void OnAudioPlayerPlayingSongChanged(object? sender, EventArgs e)
@@ -149,6 +166,16 @@ public partial class PlaybackBarViewModel : ViewModelBase
         SongImageSource = new(songPictureInfo.Stream);
     }
 
+    private void TickTock(object? sender, object e)
+    {
+        Position = _audioPlayer.Position;
+
+        if (IsPositionChangeInProgress)
+            return;
+
+        CurrentPosition = _audioPlayer.Position;
+    }
+
     public void Play()
     {
         _audioPlayer.Play();