check point

VisionBuilder.UI.Windows/Components/ErrorPreview.cs

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+using System.Collections.ObjectModel;
+using Microsoft.VisualBasic.Logging;
+using System.Drawing.Drawing2D;
+using OpenCvSharp.Extensions;
+using VisionBuilder.UI.Common.ViewModel;
+using VisionBuilder.UI.Common.ViewModel.Classes;
+using System.Collections.Specialized;
+
+namespace VisionBuilder.UI.Windows.Components
+{
+    public partial class ErrorPreview : UserControl
+    {
+        private ErrorsVM _errorPreviewVM;
+
+        // Keep track of subscription to avoid duplicate handlers
+        private ObservableCollection<ErrorData> _subscribedErrors;
+
+        public void SetViewModel(ErrorsVM errorPreviewVm)
+        {
+            // Unsubscribe from previous Errors collection if needed
+            if (_subscribedErrors != null)
+                _subscribedErrors.CollectionChanged -= Errors_CollectionChanged;
+
+            _errorPreviewVM = errorPreviewVm;
+
+            if (_errorPreviewVM != null)
+            {
+                _subscribedErrors = _errorPreviewVM.Errors;
+                _subscribedErrors.CollectionChanged += Errors_CollectionChanged;
+
+                // Initial sync: clear and add all
+                flowLayoutPanel1.Controls.Clear();
+                foreach (var error in _subscribedErrors)
+                {
+                    AddErrorPreviewInternal(error);
+                }
+            }
+        }
+
+        public ErrorPreview()
+        {
+            InitializeComponent();
+        }
+
+        private Font _numberedFont = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular);
+        private void AddErrorPreviewInternal(ErrorData errorData)
+        {
+            var pb = new PictureBox();
+            var width = 293 / 2;
+            var height = 220 / 2;
+            pb.Size = new Size(width, height + 20);
+
+            var numberedImage = new Bitmap(width, height + 20);
+            var text = DateTime.Now.ToString("yy-MM-dd") + " " + DateTime.Now.ToString("T");
+
+            using (Graphics g = Graphics.FromImage(numberedImage))
+            {
+                g.Clear(Color.White);
+
+                g.InterpolationMode = InterpolationMode.HighQualityBicubic;
+                try
+                {
+                    g.DrawImage(errorData.ImageAnalysis.ToBitmap(), 0, 0, width, height);
+                }
+                catch (Exception ex)
+                {
+
+                }
+
+                var measure = g.MeasureString(text, _numberedFont);
+                g.TranslateTransform(width / 2 - measure.Width / 2, height);
+
+                g.DrawString(text, _numberedFont, Brushes.Black, 0, 0);
+            }
+            pb.Image = numberedImage;
+            pb.SizeMode = PictureBoxSizeMode.Zoom;
+            pb.Cursor = Cursors.Hand;
+            pb.Click += (sender, args) =>
+            {
+                _errorPreviewVM.ShowImage(errorData);
+            };
+            var tag = (errorData, text);
+            pb.Tag = tag;
+            flowLayoutPanel1.Controls.Add(pb);
+            flowLayoutPanel1.Controls.SetChildIndex(pb, 0);
+
+            try
+            {
+                flowLayoutPanel1.Refresh();
+            }
+            catch
+            {
+
+            }
+        }
+
+        private void Errors_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            if (InvokeRequired)
+            {
+                BeginInvoke(new NotifyCollectionChangedEventHandler(Errors_CollectionChanged), sender, e);
+                return;
+            }
+
+            if (e.Action == NotifyCollectionChangedAction.Add)
+            {
+                foreach (ErrorData newError in e.NewItems)
+                {
+                    AddErrorPreviewInternal(newError);
+                }
+            }
+            else if (e.Action == NotifyCollectionChangedAction.Remove)
+            {
+                foreach (ErrorData oldError in e.OldItems)
+                {
+                    // Remove the PictureBox whose Tag contains the oldError
+                    foreach (Control ctrl in flowLayoutPanel1.Controls)
+                    {
+                        if (ctrl is PictureBox pb && pb.Tag is ValueTuple<ErrorData, string> tag && tag.Item1 == oldError)
+                        {
+                            flowLayoutPanel1.Controls.Remove(pb);
+                            pb.Dispose();
+                            break;
+                        }
+                    }
+                }
+            }
+            else if (e.Action == NotifyCollectionChangedAction.Reset)
+            {
+                flowLayoutPanel1.Controls.Clear();
+            }
+            
+        }
+    }
+}