From aca552224580009b3ce129cdcb496c2c55e0eb70 Mon Sep 17 00:00:00 2001
From: Chandler Cox <mr.chandlercox@gmail.com>
Date: Wed, 5 Oct 2022 21:16:54 -0500
Subject: [PATCH] Fixed small bug when moving a tab when close to the split
 panel splitter

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

diff --git a/Source/Engine/UI/GUI/Panels/SplitPanel.cs b/Source/Engine/UI/GUI/Panels/SplitPanel.cs
index 4b15c38db..65ef60a19 100644
--- a/Source/Engine/UI/GUI/Panels/SplitPanel.cs
+++ b/Source/Engine/UI/GUI/Panels/SplitPanel.cs
@@ -24,6 +24,7 @@ namespace FlaxEngine.GUI
         private Rectangle _splitterRect;
         private bool _splitterClicked, _mouseOverSplitter;
         private bool _cursorChanged;
+        private bool _anyMouseButtonDown;
 
         /// <summary>
         /// The first panel (left or upper based on Orientation).
@@ -163,8 +164,9 @@ namespace FlaxEngine.GUI
             {
                 SplitterValue = _orientation == Orientation.Horizontal ? location.X / Width : location.Y / Height;
                 Cursor = _orientation == Orientation.Horizontal ? CursorType.SizeWE : CursorType.SizeNS;
+                _cursorChanged = true;
             }
-            else if (_mouseOverSplitter)
+            else if (_mouseOverSplitter && !_anyMouseButtonDown)
             {
                 Cursor = _orientation == Orientation.Horizontal ? CursorType.SizeWE : CursorType.SizeNS;
                 _cursorChanged = true;
@@ -181,6 +183,7 @@ namespace FlaxEngine.GUI
         /// <inheritdoc />
         public override bool OnMouseDown(Float2 location, MouseButton button)
         {
+            _anyMouseButtonDown = true;
             if (button == MouseButton.Left && _splitterRect.Contains(location))
             {
                 // Start moving splitter
@@ -195,6 +198,7 @@ namespace FlaxEngine.GUI
         /// <inheritdoc />
         public override bool OnMouseUp(Float2 location, MouseButton button)
         {
+            _anyMouseButtonDown = false;
             if (_splitterClicked)
             {
                 EndTracking();