Merge pull request #363 from GID0317/Gallery-Fix-CodePresenterBlinkingCarret

Gallery-Fix: Fix Blinking Carret Showing on Code Presenter

Author: NotYoojun

source/iNKORE.UI.WPF.Modern.Gallery/Controls/SampleCodePresenter.xaml.cs

@@ -1,4 +1,4 @@
-using ColorCodeStandard;
+using ColorCodeStandard;
 using ICSharpCode.AvalonEdit;
 using ICSharpCode.AvalonEdit.Editing;
 using ICSharpCode.AvalonEdit.Highlighting;
@@ -72,6 +72,29 @@ public SampleCodePresenter()
             CodePresenter.TextArea.SelectionBorder = new Pen(Brushes.Transparent, 0);
             CodePresenter.TextArea.SelectionCornerRadius = 0;
             CodePresenter.TextArea.SetResourceReference(TextArea.SelectionBrushProperty, ThemeKeys.TextControlSelectionHighlightColorKey);
+
+            // Ensure caret never shows (keep selection & copy)
+            HideCaretPermanently();
+            CodePresenter.TextArea.GotFocus += (s,e)=> HideCaretPermanently();
+            CodePresenter.TextArea.TextView.VisualLinesChanged += (s,e)=> HideCaretPermanently();
+        }
+
+        private void HideCaretPermanently()
+        {
+            // Make sure the editor can still be clicked for selection but caret invisible.
+            var caret = CodePresenter.TextArea.Caret;
+            caret.CaretBrush = Brushes.Transparent;
+            // keep focus off the editor so IME/caret logic does not repaint a visible caret
+            if (CodePresenter.IsFocused)
+            {
+                // Move focus to parent container (still allows mouse selection highlight within AvalonEdit)
+                var parent = (DependencyObject)CodePresenter.Parent;
+                while (parent != null && parent is not Control)
+                {
+                    parent = LogicalTreeHelper.GetParent(parent);
+                }
+                (parent as Control)?.Focusable.Equals(true);
+            }
         }
 
         private static void OnSubstitutionsPropertyChanged(DependencyObject target, DependencyPropertyChangedEventArgs args)