Fix #582, check focus manager

amwx · Jun 23, 2024 · 5a5c25d · 5a5c25d
1 parent 09757c5
commit 5a5c25d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/FluentAvalonia/UI/Controls/FAComboBox/FAComboBox.cs b/src/FluentAvalonia/UI/Controls/FAComboBox/FAComboBox.cs
@@ -362,7 +362,7 @@ protected override void OnLostFocus(RoutedEventArgs e)
 
         bool HasImplicitFocus()
         {
-            var c = TopLevel.GetTopLevel(this).FocusManager.GetFocusedElement() as Control;
+            var c = TopLevel.GetTopLevel(this)?.FocusManager?.GetFocusedElement() as Control;
             // FAComboBoxItem is the only container we allow, so if it has focus
             // we know we're in this ComboBox's dropdown and have implicit focus
             if (c is FAComboBoxItem)