Added null check for panel.

Problem reared its head when #1709 was fixed.
8 years ago · 2f7a578c38
1 changed files with 7 additions and 4 deletions
--- a/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs
+++ b/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs
@ -408,12 +408,15 @@ namespace Avalonia.Controls.Primitives

            var panel = (InputElement)Presenter.Panel;

-            foreach (var container in e.Containers)
+            if (panel != null)
            {
-                if (KeyboardNavigation.GetTabOnceActiveElement(panel) == container.ContainerControl)
+                foreach (var container in e.Containers)
                {
-                    KeyboardNavigation.SetTabOnceActiveElement(panel, null);
-                    break;
+                    if (KeyboardNavigation.GetTabOnceActiveElement(panel) == container.ContainerControl)
+                    {
+                        KeyboardNavigation.SetTabOnceActiveElement(panel, null);
+                        break;
+                    }
                }
            }
        }