From e6f90898cbabc01275c57da564aed0c9af761341 Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@goat.moe>
Date: Fri, 18 Apr 2025 21:44:09 +0300
Subject: [PATCH] Fix editor viewport activating while dragging a window

---
 Source/Editor/GUI/Docking/WindowDragHelper.cs | 7 +++++++
 Source/Editor/Viewport/EditorViewport.cs      | 3 ++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/Source/Editor/GUI/Docking/WindowDragHelper.cs b/Source/Editor/GUI/Docking/WindowDragHelper.cs
index a6c0ee31d..1fc2cb07b 100644
--- a/Source/Editor/GUI/Docking/WindowDragHelper.cs
+++ b/Source/Editor/GUI/Docking/WindowDragHelper.cs
@@ -32,9 +32,15 @@ namespace FlaxEditor.GUI.Docking
         /// The opacity of the dragged window when hint controls are shown.
         /// </summary>
         public const float DragWindowOpacity = 0.4f;
+        
+        /// <summary>
+        /// Returns true if any windows are being dragged.
+        /// </summary>
+        public static bool IsDragActive { get; private set; }
 
         private WindowDragHelper(FloatWindowDockPanel toMove, Window dragSourceWindow)
         {
+            IsDragActive = true;
             _toMove = toMove;
             _toSet = DockState.Float;
             var window = toMove.Window.Window;
@@ -72,6 +78,7 @@ namespace FlaxEditor.GUI.Docking
         /// </summary>
         public void Dispose()
         {
+            IsDragActive = false;
             var window = _toMove?.Window?.Window;
 
             // Unbind events
diff --git a/Source/Editor/Viewport/EditorViewport.cs b/Source/Editor/Viewport/EditorViewport.cs
index 9abb631bb..d64152037 100644
--- a/Source/Editor/Viewport/EditorViewport.cs
+++ b/Source/Editor/Viewport/EditorViewport.cs
@@ -4,6 +4,7 @@ using System;
 using System.Linq;
 using FlaxEditor.Content.Settings;
 using FlaxEditor.GUI.ContextMenu;
+using FlaxEditor.GUI.Docking;
 using FlaxEditor.GUI.Input;
 using FlaxEditor.Options;
 using FlaxEditor.Viewport.Cameras;
@@ -1578,7 +1579,7 @@ namespace FlaxEditor.Viewport
 
             // Update input
             var window = win.Window;
-            var canUseInput = window != null && window.IsFocused && window.IsForegroundWindow;
+            var canUseInput = window != null && window.IsFocused && window.IsForegroundWindow && !WindowDragHelper.IsDragActive;
             {
                 // Get input buttons and keys (skip if viewport has no focus or mouse is over a child control)
                 var isViewportControllingMouse = canUseInput && IsControllingMouse;