feat: safe image loading

add AsyncImageViewModel that loading images sequentially
2026-03-05 09:32:24 +03:00
parent fe46722d55
commit d7c0883e6b
3 changed files with 112 additions and 27 deletions
@@ -0,0 +1,51 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+using Avalonia.Media;
+using Avalonia.Media.Imaging;
+using Avalonia.Threading;
+
+using GSS2.Core.Analysis.AmineContent.Database.Calibration;
+
+namespace GSS2.UI.Core.ViewModels;
+
+public partial class AsyncImageRecordViewModel : ViewModelBase
+{
+    private static readonly SemaphoreSlim _semaphore = new(1, 1);
+
+    private readonly string _path;
+
+    [ObservableProperty] private ImageRecord _imageRecord;
+    [ObservableProperty] private IImage? _image;
+    [ObservableProperty] private bool _isLoading = true;
+
+    public AsyncImageRecordViewModel(string path, ImageRecord imageRecord)
+    {
+        _path = path;
+        _imageRecord = imageRecord;
+        _ = LoadAsync();
+    }
+
+    private async Task LoadAsync()
+    {
+        await _semaphore.WaitAsync();
+
+        try
+        {
+            var bitmap = await Task.Run(() => new Bitmap(_path));
+
+            await Dispatcher.UIThread.InvokeAsync(() =>
+            {
+                Image = bitmap;
+                IsLoading = false;
+            });
+        }
+        catch
+        {
+            await Dispatcher.UIThread.InvokeAsync(() => IsLoading = false);
+        }
+        finally
+        {
+            _semaphore.Release();
+        }
+    }
+}