reuse VirtualizingWrapPanel for display Dataset Explorer

Azaion.Annotator/DTO/Label.cs

@@ -148,9 +148,9 @@ public class YoloLabel : Label
         }
     }
 
-    public static async Task<List<YoloLabel>> ReadFromFile(string filename, CancellationToken cancellationToken)
+    public static async Task<List<YoloLabel>> ReadFromFile(string filename)
     {
-        var str = await File.ReadAllTextAsync(filename, cancellationToken);
+        var str = await File.ReadAllTextAsync(filename);
 
         return str.Split(Environment.NewLine)
             .Select(Parse)

Azaion.Annotator/DTO/ThumbnailDto.cs

@@ -0,0 +1,57 @@
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows.Media.Imaging;
+
+namespace Azaion.Annotator.DTO;
+
+public class ThumbnailDto : INotifyPropertyChanged
+{
+    public string ThumbnailPath { get; set; }
+    public string ImagePath { get; set; }
+    public string LabelPath { get; set; }
+
+    private BitmapImage? _image;
+    public BitmapImage? Image
+    {
+        get
+        {
+            if (_image == null)
+                LoadImageAsync();
+            return _image;
+        }
+        set
+        {
+            _image = value;
+            OnPropertyChanged();
+        }
+    }
+
+    private async void LoadImageAsync()
+    {
+        await Task.Run(() =>
+        {
+            try
+            {
+                var bitmap = new BitmapImage();
+                bitmap.BeginInit();
+                bitmap.UriSource = new Uri(ThumbnailPath);
+                bitmap.CacheOption = BitmapCacheOption.OnLoad;
+                bitmap.DecodePixelWidth = 480;
+                bitmap.DecodePixelHeight = 270;
+                bitmap.EndInit();
+                bitmap.Freeze(); // Freeze to make it cross-thread accessible
+                Image = bitmap;
+            }
+            catch (Exception e)
+            {
+                Console.WriteLine(e);
+            }
+        });
+    }
+
+    public event PropertyChangedEventHandler? PropertyChanged;
+    protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
+    {
+        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+    }
+}