chore: move CameraView logic to itself

GSS2.Test/CameraView.axaml.cs

@@ -72,7 +72,7 @@ class VkRenderer
                 SType = StructureType.FenceCreateInfo
             };
             context.Api.CreateFence(context.Device, &fenceInfo, null, out var fence).ThrowOnError();
-            
+
             var (importImage, importMemoryReqirements, importMemory) = ImportImage(fdDup, width, height, stride);
             var (exportImage, exportMemoryReqirements, exportMemory) = CreateExportImage(width, height);
 
@@ -380,6 +380,7 @@ public partial class CameraView : Control
     private bool _compositionRequested;
     private VkRenderer? _renerer;
     private VkImage? _latestImage;
+    private System.Timers.Timer? _updateTimer;
 
     public CameraView()
     { }
@@ -388,11 +389,40 @@ public partial class CameraView : Control
     {
         base.OnAttachedToVisualTree(e);
         Initialize();
+        if (!_initialized)
+            return;
+        int i = 0;
+        _updateTimer = new System.Timers.Timer(100)
+        {
+            AutoReset = true
+        };
+        _updateTimer.Elapsed += async (_, _) =>
+        {
+            await Dispatcher.UIThread.InvokeAsync(async () =>
+            {
+                var viewModel = DataContext as CameraViewModel;
+                if (viewModel is null)
+                    return;
+
+                var result = await viewModel.CaptureImage(i++);
+                if (result is not null)
+                {
+                    var (frameBuffer, streamConfiguration) = result.Value;
+                    if (frameBuffer.Metadata.Status == FrameMetadata.StatusEnum.FrameSuccess)
+                        Update(frameBuffer, streamConfiguration);
+                }
+            });
+        };
+        _updateTimer.Start();
     }
     protected override void OnDetachedFromLogicalTree(LogicalTreeAttachmentEventArgs e)
     {
         if (_initialized)
+        {
+            _updateTimer?.Stop();
+            _updateTimer?.Dispose();
             Surface?.Dispose();
+        }
 
         _initialized = false;
         base.OnDetachedFromLogicalTree(e);
@@ -425,10 +455,6 @@ public partial class CameraView : Control
             _visual.Size = new Vector(Bounds.Width, Bounds.Height);
             Update();
         }
-        if (change.Property == DataContextProperty)
-        {
-            (DataContext as CameraViewModel)?.Update += (_, ea) => Update(ea.FrameBuffer, ea.StreamConfiguration);
-        }
         base.OnPropertyChanged(change);
     }