don't try open tooltip on detached control

6 years ago · a3dbf72947
1 changed files with 5 additions and 1 deletions
--- a/src/Avalonia.Controls/ToolTipService.cs
+++ b/src/Avalonia.Controls/ToolTipService.cs
@ -1,6 +1,7 @@
 using System;
 using Avalonia.Input;
 using Avalonia.Threading;
+using Avalonia.VisualTree;

 namespace Avalonia.Controls
 {
@ -79,7 +80,10 @@ namespace Avalonia.Controls
        {
            StopTimer();

-            ToolTip.SetIsOpen(control, true);
+            if ((control as IVisual).IsAttachedToVisualTree)
+            {
+                ToolTip.SetIsOpen(control, true);
+            }
        }

        private void Close(Control control)