From 9a5d8e2c51cc0bff78af3388ca86fc8719033c59 Mon Sep 17 00:00:00 2001
From: Chandler Cox <mr.chandlercox@gmail.com>
Date: Thu, 28 Sep 2023 15:31:30 -0500
Subject: [PATCH] Fix tooltip crash

---
 Source/Engine/UI/GUI/Tooltip.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/UI/GUI/Tooltip.cs b/Source/Engine/UI/GUI/Tooltip.cs
index e98c07cc5..734fb078f 100644
--- a/Source/Engine/UI/GUI/Tooltip.cs
+++ b/Source/Engine/UI/GUI/Tooltip.cs
@@ -181,6 +181,9 @@ namespace FlaxEngine.GUI
 
         private void WrapPosition(ref Float2 locationSS, float flipOffset = 0.0f)
         {
+            if (_showTarget?.RootWindow == null)
+                return;
+
             // Calculate popup direction
             var dpiScale = _showTarget.RootWindow.DpiScale;
             var dpiSize = Size * dpiScale;
@@ -207,7 +210,8 @@ namespace FlaxEngine.GUI
             // Move window with mouse location
             var mousePos = Input.MouseScreenPosition;
             WrapPosition(ref mousePos, 10);
-            _window.Position = mousePos + new Float2(15, 10);
+            if (_window)
+                _window.Position = mousePos + new Float2(15, 10);
 
             // Auto hide if mouse leaves control area
             var location = _showTarget.PointFromScreen(mousePos);