some linux work from summer

# Conflicts:
#	Source/Editor/Windows/SceneTreeWindow.cs

.github/workflows/build_linux.yml

@@ -16,7 +16,7 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET
@@ -44,7 +44,7 @@ jobs:
       uses: actions/checkout@v3
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev libwayland-dev
     - name: Setup Vulkan
       uses: ./.github/actions/vulkan
     - name: Setup .NET

.github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
         git lfs pull
     - name: Install dependencies
       run: |
-        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
+        sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev libwayland-dev
     - name: Build
       run: |
         ./GenerateProjectFiles.sh -vs2022 -log -verbose -printSDKs -dotnet=8

Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl

@@ -28,6 +28,13 @@ TextureCube SkyLightTexture : register(t__SRV__);
 Buffer<float4> ShadowsBuffer : register(t__SRV__);
 Texture2D<float> ShadowMap : register(t__SRV__);
 @4// Forward Shading: Utilities
+// Public accessors for lighting data, use them as data binding might change but those methods will remain.
+LightData GetDirectionalLight() { return DirectionalLight; }
+LightData GetSkyLight() { return SkyLight; }
+ProbeData GetEnvironmentProbe() { return EnvironmentProbe; }
+ExponentialHeightFogData GetExponentialHeightFog() { return ExponentialHeightFog; }
+uint GetLocalLightsCount() { return LocalLightsCount; }
+LightData GetLocalLight(uint i) { return LocalLights[i]; }
 @5// Forward Shading: Shaders
 
 // Pixel Shader function for Forward Pass
@@ -76,9 +83,8 @@ void PS_Forward(
 	gBuffer.ShadingModel = MATERIAL_SHADING_MODEL;
 
 	// Calculate lighting from a single directional light
-	float4 shadowMask = 1.0f;
 	ShadowSample shadow = SampleDirectionalLightShadow(DirectionalLight, ShadowsBuffer, ShadowMap, gBuffer);
-	shadowMask = GetShadowMask(shadow);
+	float4 shadowMask = GetShadowMask(shadow);
 	float4 light = GetLighting(ViewPos, DirectionalLight, gBuffer, shadowMask, false, false);
 
 	// Calculate lighting from sky light
@@ -143,9 +149,9 @@ void PS_Forward(
 
 #endif
 
-#if USE_FOG
+#if USE_FOG && MATERIAL_SHADING_MODEL != SHADING_MODEL_UNLIT
 	// Calculate exponential height fog
-	float4 fog = GetExponentialHeightFog(ExponentialHeightFog, materialInput.WorldPosition, ViewPos, 0);
+	float4 fog = GetExponentialHeightFog(ExponentialHeightFog, materialInput.WorldPosition, ViewPos, 0, gBuffer.ViewPos.z);
 
 	// Apply fog to the output color
 #if MATERIAL_BLEND == MATERIAL_BLEND_OPAQUE

Content/Editor/MaterialTemplates/Terrain.shader

@@ -15,6 +15,7 @@
 #include "./Flax/Common.hlsl"
 #include "./Flax/MaterialCommon.hlsl"
 #include "./Flax/GBufferCommon.hlsl"
+#include "./Flax/TerrainCommon.hlsl"
 @7
 // Primary constant buffer (with additional material parameters)
 META_CB_BEGIN(0, Data)
@@ -334,7 +335,7 @@ VertexOutput VS(TerrainVertexInput input)
 	float lodValue = CurrentLOD;
 	float morphAlpha = lodCalculated - CurrentLOD;
 
-	// Sample heightmap
+	// Sample heightmap and splatmaps
 	float2 heightmapUVs = input.TexCoord * HeightmapUVScaleBias.xy + HeightmapUVScaleBias.zw;
 #if USE_SMOOTH_LOD_TRANSITION
 	float4 heightmapValueThisLOD = Heightmap.SampleLevel(SamplerPointClamp, heightmapUVs, lodValue);
@@ -342,7 +343,6 @@ VertexOutput VS(TerrainVertexInput input)
 	float2 heightmapUVsNextLOD = nextLODPos * HeightmapUVScaleBias.xy + HeightmapUVScaleBias.zw;
 	float4 heightmapValueNextLOD = Heightmap.SampleLevel(SamplerPointClamp, heightmapUVsNextLOD, lodValue + 1);
 	float4 heightmapValue = lerp(heightmapValueThisLOD, heightmapValueNextLOD, morphAlpha);
-	bool isHole = max(heightmapValueThisLOD.b + heightmapValueThisLOD.a, heightmapValueNextLOD.b + heightmapValueNextLOD.a) >= 1.9f;
 #if USE_TERRAIN_LAYERS
 	float4 splatmapValueThisLOD = Splatmap0.SampleLevel(SamplerPointClamp, heightmapUVs, lodValue);
 	float4 splatmapValueNextLOD = Splatmap0.SampleLevel(SamplerPointClamp, heightmapUVsNextLOD, lodValue + 1);
@@ -355,7 +355,6 @@ VertexOutput VS(TerrainVertexInput input)
 #endif
 #else
 	float4 heightmapValue = Heightmap.SampleLevel(SamplerPointClamp, heightmapUVs, lodValue);
-	bool isHole = (heightmapValue.b + heightmapValue.a) >= 1.9f;
 #if USE_TERRAIN_LAYERS
 	float4 splatmap0Value = Splatmap0.SampleLevel(SamplerPointClamp, heightmapUVs, lodValue);
 #if TERRAIN_LAYERS_DATA_SIZE > 1
@@ -363,12 +362,11 @@ VertexOutput VS(TerrainVertexInput input)
 #endif
 #endif
 #endif
-	float height = (float)((int)(heightmapValue.x * 255.0) + ((int)(heightmapValue.y * 255) << 8)) / 65535.0;
+	float height = DecodeHeightmapHeight(heightmapValue);
 
 	// Extract normal and the holes mask
-	float2 normalTemp = float2(heightmapValue.b, heightmapValue.a) * 2.0f - 1.0f;
+	bool isHole;
-	float3 normal = float3(normalTemp.x, sqrt(1.0 - saturate(dot(normalTemp, normalTemp))), normalTemp.y);
+	float3 normal = DecodeHeightmapNormal(heightmapValue, isHole);
-	normal = normalize(normal);
 	output.Geometry.HolesMask = isHole ? 0 : 1;
 	if (isHole)
 	{
@@ -438,7 +436,6 @@ VertexOutput VS(TerrainVertexInput input)
 	// Apply world position offset per-vertex
 #if USE_POSITION_OFFSET
 	output.Geometry.WorldPosition += material.PositionOffset;
-	output.Geometry.PrevWorldPosition += material.PositionOffset;
 	output.Position = mul(float4(output.Geometry.WorldPosition, 1), ViewProjectionMatrix);
 #endif
 

Flax.flaxproj

@@ -2,9 +2,9 @@
   "Name": "Flax",
   "Version": {
     "Major": 1,
-    "Minor": 10,
+    "Minor": 11,
     "Revision": 0,
-    "Build": 6705
+    "Build": 6800
   },
   "Company": "Flax",
   "Copyright": "Copyright (c) 2012-2025 Wojciech Figat. All rights reserved.",
@@ -13,6 +13,7 @@
   "Configuration": {
     "UseCSharp": true,
     "UseLargeWorlds": false,
-    "UseDotNet": true
+    "UseDotNet": true,
+    "UseSDL": true
   }
 }

Flax.sln.DotSettings

@@ -267,6 +267,7 @@
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=comperand/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=coord/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=cubemap/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=DDGI/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Deformer/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=deformers/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=defragmentation/@EntryIndexedValue">True</s:Boolean>

GenerateProjectFiles.sh

@@ -14,4 +14,4 @@ bash ./Development/Scripts/Linux/CallBuildTool.sh --genproject "$@"
 # Build bindings for all editor configurations
 echo Building C# bindings...
 # TODO: Detect the correct architecture here
-Binaries/Tools/Flax.Build -build -BuildBindingsOnly -arch=x64 -platform=Linux --buildTargets=FlaxEditor
+#Binaries/Tools/Flax.Build -build -BuildBindingsOnly -arch=x64 -platform=Linux --buildTargets=FlaxEditor

README.md

@@ -6,7 +6,7 @@
 Flax Engine is a high quality modern 3D game engine written in C++ and C#.
 From stunning graphics to powerful scripts, it's designed for fast workflow with many ready-to-use features waiting for you right now. To learn more see the website ([www.flaxengine.com](https://flaxengine.com)).
 
-This repository contains full source code of the Flax Engine (excluding NDA-protected platforms support). Anyone is welcome to contribute or use the modified source in Flax-based games.
+This repository contains full source code of the Flax Engine (excluding NDA-protected platforms support). Documentation source is also available in a separate repository. Anyone is welcome to contribute or use the modified source in Flax-based games.
 
 # Development
 
@@ -46,21 +46,26 @@ Follow the instructions below to compile and run the engine from source.
 * Install Visual Studio Code
 * Install .NET 8 or 9 SDK ([https://dotnet.microsoft.com/en-us/download/dotnet/8.0](https://dotnet.microsoft.com/en-us/download/dotnet/8.0))
   * Ubuntu: `sudo apt install dotnet-sdk-8.0`
+  * Fedora: `sudo dnf install dotnet-sdk-8.0`
   * Arch: `sudo pacman -S dotnet-sdk-8.0 dotnet-runtime-8.0 dotnet-targeting-pack-8.0 dotnet-host`
 * Install Vulkan SDK ([https://vulkan.lunarg.com/](https://vulkan.lunarg.com/))
   * Ubuntu: `sudo apt install vulkan-sdk`
-  * Arch: `sudo pacman -S spirv-tools vulkan-headers vulkan-tools vulkan-validation-layers`
+  * Fedora: `sudo dnf install vulkan-headers vulkan-tools vulkan-validation-layers`
+  * Arch: `sudo pacman -S vulkan-headers vulkan-tools vulkan-validation-layers`
 * Install Git with LFS
   * Ubuntu: `sudo apt-get install git git-lfs`
   * Arch: `sudo pacman -S git git-lfs`
   * `git-lfs install`
 * Install the required packages:
-  * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev`
+  * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev zenity wayland-protocols libportal-dev`
-  * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib`
+  * Fedora: `sudo dnf install libX11-devel libXcursor-devel  libXinerama-devel ghc-zlib-devel zenity wayland-protocols-devel libportal`
+  * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib zenity wayland-protocols libportal`
 * Install Clang compiler (version 6 or later):
   * Ubuntu: `sudo apt-get install clang lldb lld`
+  * Fedora: `sudo dnf install clang llvm lldb lld`
   * Arch: `sudo pacman -S clang lldb lld`
 * Clone the repository (with LFS)
+  * git-lfs clone https://github.com/FlaxEngine/FlaxEngine.git
 * Run `./GenerateProjectFiles.sh`
 * Open workspace with Visual Code
 * Build and run (configuration and task named `Flax|Editor.Linux.Development|x64`)

Source/Editor/Analytics/EditorAnalytics.cpp

@@ -174,7 +174,9 @@ void EditorAnalytics::StartSession()
     // Bind events
     GameCooker::OnEvent.Bind<RegisterGameCookingStart>();
     ShadowsOfMordor::Builder::Instance()->OnBuildStarted.Bind<RegisterLightmapsBuildingStart>();
+#if LOG_ENABLE
     Log::Logger::OnError.Bind<RegisterError>();
+#endif
 }
 
 void EditorAnalytics::EndSession()
@@ -187,7 +189,9 @@ void EditorAnalytics::EndSession()
     // Unbind events
     GameCooker::OnEvent.Unbind<RegisterGameCookingStart>();
     ShadowsOfMordor::Builder::Instance()->OnBuildStarted.Unbind<RegisterLightmapsBuildingStart>();
+#if LOG_ENABLE
     Log::Logger::OnError.Unbind<RegisterError>();
+#endif
 
     // End session
     {

Source/Editor/Content/Create/CreateFileEntry.cs

@@ -13,6 +13,11 @@ namespace FlaxEditor.Content.Create
         /// <inheritdoc />
         public string ResultUrl { get; }
 
+        /// <summary>
+        /// Gets a value indicating wether a file can be created based on the current settings.
+        /// </summary>
+        public abstract bool CanBeCreated { get; }
+
         /// <summary>
         /// Gets a value indicating whether this entry has settings to modify.
         /// </summary>

Source/Editor/Content/Create/CreateFilesDialog.cs

@@ -60,7 +60,8 @@ namespace FlaxEditor.Content.Create
                 Text = "Create",
                 AnchorPreset = AnchorPresets.BottomRight,
                 Offsets = new Margin(-ButtonsWidth - ButtonsMargin, ButtonsWidth, -ButtonsHeight - ButtonsMargin, ButtonsHeight),
-                Parent = this
+                Parent = this,
+                Enabled = entry.CanBeCreated,
             };
             createButton.Clicked += OnSubmit;
             var cancelButton = new Button
@@ -68,7 +69,7 @@ namespace FlaxEditor.Content.Create
                 Text = "Cancel",
                 AnchorPreset = AnchorPresets.BottomRight,
                 Offsets = new Margin(-ButtonsWidth - ButtonsMargin - ButtonsWidth - ButtonsMargin, ButtonsWidth, -ButtonsHeight - ButtonsMargin, ButtonsHeight),
-                Parent = this
+                Parent = this,
             };
             cancelButton.Clicked += OnCancel;
 
@@ -77,7 +78,7 @@ namespace FlaxEditor.Content.Create
             {
                 AnchorPreset = AnchorPresets.HorizontalStretchTop,
                 Offsets = new Margin(2, 2, infoLabel.Bottom + 2, EditorHeight),
-                Parent = this
+                Parent = this,
             };
 
             // Settings editor
@@ -87,6 +88,7 @@ namespace FlaxEditor.Content.Create
             _dialogSize = new Float2(TotalWidth, panel.Bottom);
 
             _settingsEditor.Select(_entry.Settings);
+            _settingsEditor.Modified += () => createButton.Enabled = _entry.CanBeCreated;
         }
 
         /// <inheritdoc />

Source/Editor/Content/Create/ParticleEmitterCreateEntry.cs

@@ -12,6 +12,9 @@ namespace FlaxEditor.Content.Create
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     public class ParticleEmitterCreateEntry : CreateFileEntry
     {
+        /// <inheritdoc/>
+        public override bool CanBeCreated => true;
+
         /// <summary>
         /// Types of the emitter templates that can be created.
         /// </summary>

Source/Editor/Content/Create/PrefabCreateEntry.cs

@@ -14,6 +14,9 @@ namespace FlaxEditor.Content.Create
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     public class PrefabCreateEntry : CreateFileEntry
     {
+        /// <inheritdoc />
+        public override bool CanBeCreated => _options.RootActorType != null;
+
         /// <summary>
         /// The create options.
         /// </summary>
@@ -73,6 +76,9 @@ namespace FlaxEditor.Content.Create
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     public class WidgetCreateEntry : CreateFileEntry
     {
+        /// <inheritdoc/>
+        public override bool CanBeCreated => _options.RootControlType != null;
+
         /// <summary>
         /// The create options.
         /// </summary>

Source/Editor/Content/Create/SettingsCreateEntry.cs

@@ -17,6 +17,8 @@ namespace FlaxEditor.Content.Create
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     internal class SettingsCreateEntry : CreateFileEntry
     {
+        public override bool CanBeCreated => _options.Type != null;
+
         internal class Options
         {
             [Tooltip("The settings type.")]

Source/Editor/Content/Create/VisualScriptCreateEntry.cs

@@ -11,6 +11,9 @@ namespace FlaxEditor.Content.Create
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     public class VisualScriptCreateEntry : CreateFileEntry
     {
+        /// <inheritdoc/>
+        public override bool CanBeCreated => _options.BaseClass != null;
+
         /// <summary>
         /// The create options.
         /// </summary>

Source/Editor/Content/GUI/ContentView.cs

@@ -145,7 +145,7 @@ namespace FlaxEditor.Content.GUI
             set
             {
                 value = Mathf.Clamp(value, 0.3f, 3.0f);
-                if (!Mathf.NearEqual(value, _viewScale))
+                if (value != _viewScale)
                 {
                     _viewScale = value;
                     ViewScaleChanged?.Invoke();

Source/Editor/Content/Items/ContentFolder.cs

@@ -282,7 +282,7 @@ namespace FlaxEditor.Content
 
             if (data is DragDataFiles)
                 return DragDropEffect.Copy;
-            return _dragOverItems.Effect;
+            return _dragOverItems?.Effect ?? DragDropEffect.None;
         }
 
         /// <inheritdoc />

Source/Editor/Content/Items/CppScriptItem.cs

@@ -20,7 +20,7 @@ namespace FlaxEditor.Content
         }
 
         /// <inheritdoc />
-        public override string TypeDescription => Path.EndsWith(".h") ? "C++ Header File" : "C++ Source Code";
+        public override string TypeDescription => Path.EndsWith(".h") || Path.EndsWith(".hpp") ? "C++ Header File" : "C++ Source Code";
 
         /// <inheritdoc />
         public override SpriteHandle DefaultThumbnail => Editor.Instance.Icons.CPPScript128;

Source/Editor/Content/Proxy/JsonAssetProxy.cs

@@ -65,6 +65,9 @@ namespace FlaxEditor.Content
     /// <seealso cref="FlaxEditor.Content.Create.CreateFileEntry" />
     public class GenericJsonCreateEntry : CreateFileEntry
     {
+        /// <inheritdoc/>
+        public override bool CanBeCreated => _options.Type != null; 
+
         /// <summary>
         /// The create options.
         /// </summary>

Source/Editor/Content/Proxy/ShaderSourceProxy.cs

@@ -10,11 +10,9 @@ using FlaxEngine;
 namespace FlaxEditor.Content
 {
     /// <summary>
-    /// Context proxy object for shader source files (represented by <see cref="ShaderSourceItem"/>).
+    /// Base class for shader source files.
     /// </summary>
-    /// <seealso cref="FlaxEditor.Content.ContentProxy" />
+    public abstract class ShaderBaseProxy : ContentProxy
-    [ContentContextMenu("New/Shader Source")]
-    public class ShaderSourceProxy : ContentProxy
     {
         /// <inheritdoc />
         public override bool CanCreate(ContentFolder targetLocation)
@@ -29,6 +27,21 @@ namespace FlaxEditor.Content
             return targetLocation.ShortName == "Source" && prevTargetLocation.ShortName == "Shaders";
         }
 
+        /// <inheritdoc />
+        public override EditorWindow Open(Editor editor, ContentItem item)
+        {
+            Editor.Instance.CodeEditing.OpenFile(item.Path);
+            return null;
+        }
+    }
+
+    /// <summary>
+    /// Context proxy object for shader source files (represented by <see cref="ShaderSourceItem"/>).
+    /// </summary>
+    /// <seealso cref="FlaxEditor.Content.ContentProxy" />
+    [ContentContextMenu("New/Shader Source (.shader)")]
+    public class ShaderSourceProxy : ShaderBaseProxy
+    {
         /// <inheritdoc />
         public override void Create(string outputPath, object arg)
         {
@@ -44,13 +57,6 @@ namespace FlaxEditor.Content
             File.WriteAllText(outputPath, shaderTemplate, Encoding.UTF8);
         }
 
-        /// <inheritdoc />
-        public override EditorWindow Open(Editor editor, ContentItem item)
-        {
-            Editor.Instance.CodeEditing.OpenFile(item.Path);
-            return null;
-        }
-
         /// <inheritdoc />
         public override Color AccentColor => Color.FromRGB(0x7542f5);
 
@@ -66,4 +72,33 @@ namespace FlaxEditor.Content
             return item is ShaderSourceItem;
         }
     }
+
+    /// <summary>
+    /// Context proxy object for shader header files.
+    /// </summary>
+    /// <seealso cref="FlaxEditor.Content.ContentProxy" />
+    [ContentContextMenu("New/Shader Header (.hlsl)")]
+    public class ShaderHeaderProxy : ShaderBaseProxy
+    {
+        /// <inheritdoc />
+        public override void Create(string outputPath, object arg)
+        {
+            File.WriteAllText(outputPath, "\n", Encoding.UTF8);
+        }
+
+        /// <inheritdoc />
+        public override Color AccentColor => Color.FromRGB(0x2545a5);
+
+        /// <inheritdoc />
+        public override string FileExtension => "hlsl";
+
+        /// <inheritdoc />
+        public override string Name => "Shader Header";
+
+        /// <inheritdoc />
+        public override bool IsProxyFor(ContentItem item)
+        {
+            return false;
+        }
+    }
 }

Source/Editor/Cooker/GameCooker.cpp

@@ -30,6 +30,7 @@
 #include "Engine/Scripting/ManagedCLR/MAssembly.h"
 #include "Engine/Content/JsonAsset.h"
 #include "Engine/Content/AssetReference.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #if PLATFORM_TOOLS_WINDOWS
 #include "Platform/Windows/WindowsPlatformTools.h"
 #include "Engine/Platform/Windows/WindowsPlatformSettings.h"
@@ -380,6 +381,7 @@ bool GameCooker::IsCancelRequested()
 
 PlatformTools* GameCooker::GetTools(BuildPlatform platform)
 {
+    PROFILE_MEM(Editor);
     PlatformTools* result = nullptr;
     if (!Tools.TryGet(platform, result))
     {
@@ -471,6 +473,7 @@ bool GameCooker::Build(BuildPlatform platform, BuildConfiguration configuration,
         LOG(Error, "Build platform {0} is not supported.", ::ToString(platform));
         return true;
     }
+    PROFILE_MEM(Editor);
 
     // Setup
     CancelFlag = 0;
@@ -624,6 +627,7 @@ void GameCookerImpl::ReportProgress(const String& info, float totalProgress)
 
 void GameCookerImpl::OnCollectAssets(HashSet<Guid>& assets)
 {
+    PROFILE_MEM(Editor);
     if (Internal_OnCollectAssets == nullptr)
     {
         auto c = GameCooker::GetStaticClass();
@@ -651,6 +655,7 @@ void GameCookerImpl::OnCollectAssets(HashSet<Guid>& assets)
 
 bool GameCookerImpl::Build()
 {
+    PROFILE_MEM(Editor);
     CookingData& data = *Data;
     LOG(Info, "Starting Game Cooker...");
     LOG(Info, "Platform: {0}, Configuration: {2}, Options: {1}", ::ToString(data.Platform), (int32)data.Options, ::ToString(data.Configuration));
@@ -778,6 +783,8 @@ int32 GameCookerImpl::ThreadFunction()
 
 bool GameCookerService::Init()
 {
+    PROFILE_MEM(Editor);
+
     auto editorAssembly = ((NativeBinaryModule*)GetBinaryModuleFlaxEngine())->Assembly;
     editorAssembly->Unloading.Bind(OnEditorAssemblyUnloading);
     GameCooker::OnCollectAssets.Bind(OnCollectAssets);
@@ -789,6 +796,7 @@ void GameCookerService::Update()
 {
     if (IsRunning)
     {
+        PROFILE_MEM(Editor);
         ScopeLock lock(ProgressLocker);
 
         if (ProgressMsg.HasChars())

Source/Editor/Cooker/Platform/Mac/MacPlatformTools.cpp

@@ -186,7 +186,7 @@ bool MacPlatformTools::OnPostProcess(CookingData& data)
         ADD_ENTRY("CFBundlePackageType", "APPL");
         ADD_ENTRY("NSPrincipalClass", "NSApplication");
         ADD_ENTRY("LSApplicationCategoryType", "public.app-category.games");
-        ADD_ENTRY("LSMinimumSystemVersion", "10.15");
+        ADD_ENTRY("LSMinimumSystemVersion", "13");
         ADD_ENTRY("CFBundleIconFile", "icon.icns");
         ADD_ENTRY_STR("CFBundleExecutable", executableName);
         ADD_ENTRY_STR("CFBundleIdentifier", appIdentifier);

Source/Editor/Cooker/Steps/CookAssetsStep.cpp

@@ -36,6 +36,7 @@
 #include "Engine/Engine/Base/GameBase.h"
 #include "Engine/Engine/Globals.h"
 #include "Engine/Tools/TextureTool/TextureTool.h"
+#include "Engine/Threading/Threading.h"
 #include "Engine/Profiler/ProfilerCPU.h"
 #include "Engine/Scripting/Enums.h"
 #if PLATFORM_TOOLS_WINDOWS

Source/Editor/CustomEditors/CustomEditorPresenter.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using FlaxEditor.SceneGraph;
 using FlaxEditor.Scripting;
 using FlaxEngine;
 using FlaxEngine.GUI;
@@ -52,6 +53,16 @@ namespace FlaxEditor.CustomEditors
         /// </summary>
         /// <param name="nodes">The nodes to select</param>
         public void Select(List<SceneGraph.SceneGraphNode> nodes);
+
+        /// <summary>
+        /// Gets the current selection.
+        /// </summary>
+        public List<SceneGraphNode> Selection { get; }
+
+        /// <summary>
+        /// Indication of if the properties window is locked on specific objects.
+        /// </summary>
+        public bool LockSelection { get; set; }
     }
 
     /// <summary>
@@ -81,6 +92,8 @@ namespace FlaxEditor.CustomEditors
                 Offsets = Margin.Zero;
                 Pivot = Float2.Zero;
                 IsScrollable = true;
+                Spacing = Utilities.Constants.UIMargin;
+                Margin = new Margin(Utilities.Constants.UIMargin);
             }
 
             /// <inheritdoc />
@@ -95,7 +108,7 @@ namespace FlaxEditor.CustomEditors
                 {
                     FlaxEditor.Editor.LogWarning(ex);
 
-                    // Refresh layout on errors to reduce lgo spam
+                    // Refresh layout on errors to reduce log spam
                     _presenter.BuildLayout();
                 }
 

Source/Editor/CustomEditors/CustomEditorsUtil.cpp

@@ -6,6 +6,8 @@
 #include "Engine/Core/Types/TimeSpan.h"
 #include "Engine/Core/Types/Stopwatch.h"
 #include "Engine/Core/Collections/Dictionary.h"
+#include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/BinaryModule.h"
@@ -69,6 +71,7 @@ MTypeObject* CustomEditorsUtil::GetCustomEditor(MTypeObject* refType)
 
 bool CustomEditorsUtilService::Init()
 {
+    PROFILE_MEM(Editor);
     TRACK_ASSEMBLY(((NativeBinaryModule*)GetBinaryModuleFlaxEngine())->Assembly);
     Scripting::BinaryModuleLoaded.Bind(&OnBinaryModuleLoaded);
 
@@ -77,6 +80,8 @@ bool CustomEditorsUtilService::Init()
 
 void OnAssemblyLoaded(MAssembly* assembly)
 {
+    PROFILE_CPU_NAMED("CustomEditors.OnAssemblyLoaded");
+    PROFILE_MEM(Editor);
     Stopwatch stopwatch;
 
     // Prepare FlaxEngine

Source/Editor/CustomEditors/Dedicated/ActorEditor.cs

@@ -9,7 +9,6 @@ using FlaxEditor.CustomEditors.Elements;
 using FlaxEditor.GUI;
 using FlaxEditor.GUI.ContextMenu;
 using FlaxEditor.GUI.Tree;
-using FlaxEditor.Modules;
 using FlaxEditor.Scripting;
 using FlaxEditor.Windows;
 using FlaxEditor.Windows.Assets;
@@ -71,7 +70,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                         // Display prefab UI (when displaying object inside Prefab Window then display only nested prefabs)
                         prefab.GetNestedObject(ref prefabObjectId, out var nestedPrefabId, out var nestedPrefabObjectId);
                         var nestedPrefab = FlaxEngine.Content.Load<Prefab>(nestedPrefabId);
-                        var panel = layout.CustomContainer<UniformGridPanel>();
+                        var panel = layout.UniformGrid();
                         panel.CustomControl.Height = 20.0f;
                         panel.CustomControl.SlotsVertically = 1;
                         if (Presenter == Editor.Instance.Windows.PropertiesWin.Presenter || nestedPrefab)
@@ -133,35 +132,22 @@ namespace FlaxEditor.CustomEditors.Dedicated
             var actor = (Actor)Values[0];
             var scriptType = TypeUtils.GetType(actor.TypeName);
             var item = scriptType.ContentItem;
-            if (Presenter.Owner is PropertiesWindow propertiesWindow)
+            if (Presenter.Owner != null)
             {
-                var lockButton = cm.AddButton(propertiesWindow.LockObjects ? "Unlock" : "Lock");
+                var lockButton = cm.AddButton(Presenter.Owner.LockSelection ? "Unlock" : "Lock");
                 lockButton.ButtonClicked += button =>
                 {
-                    propertiesWindow.LockObjects = !propertiesWindow.LockObjects;
+                    var owner = Presenter?.Owner;
+                    if (owner == null)
+                        return;
+                    owner.LockSelection = !owner.LockSelection;
 
                     // Reselect current selection
-                    if (!propertiesWindow.LockObjects && Editor.Instance.SceneEditing.SelectionCount > 0)
+                    if (!owner.LockSelection && owner.Selection.Count > 0)
                     {
-                        var cachedSelection = Editor.Instance.SceneEditing.Selection.ToArray();
+                        var cachedSelection = owner.Selection.ToList();
-                        Editor.Instance.SceneEditing.Select(null);
+                        owner.Select(null);
-                        Editor.Instance.SceneEditing.Select(cachedSelection);
+                        owner.Select(cachedSelection);
-                    }
-                };
-            }
-            else if (Presenter.Owner is PrefabWindow prefabWindow)
-            {
-                var lockButton = cm.AddButton(prefabWindow.LockSelectedObjects ? "Unlock" : "Lock");
-                lockButton.ButtonClicked += button =>
-                {
-                    prefabWindow.LockSelectedObjects = !prefabWindow.LockSelectedObjects;
-
-                    // Reselect current selection
-                    if (!prefabWindow.LockSelectedObjects && prefabWindow.Selection.Count > 0)
-                    {
-                        var cachedSelection = prefabWindow.Selection.ToList();
-                        prefabWindow.Select(null);
-                        prefabWindow.Select(cachedSelection);
                     }
                 };
             }
@@ -258,7 +244,17 @@ namespace FlaxEditor.CustomEditors.Dedicated
             else if (editor.Values[0] is SceneObject sceneObject)
             {
                 node.TextColor = sceneObject.HasPrefabLink ? FlaxEngine.GUI.Style.Current.ProgressNormal : FlaxEngine.GUI.Style.Current.BackgroundSelected;
-                node.Text = Utilities.Utils.GetPropertyNameUI(sceneObject.GetType().Name);
+                if (editor.Values.Info != ScriptMemberInfo.Null)
+                {
+                    if (editor.Values.GetAttributes().FirstOrDefault(x => x is EditorDisplayAttribute) is EditorDisplayAttribute editorDisplayAttribute && !string.IsNullOrEmpty(editorDisplayAttribute.Name))
+                        node.Text = $"{Utilities.Utils.GetPropertyNameUI(editorDisplayAttribute.Name)} ({Utilities.Utils.GetPropertyNameUI(editor.Values.Info.Name)})";
+                    else
+                        node.Text = Utilities.Utils.GetPropertyNameUI(editor.Values.Info.Name);
+                }
+                else if (sceneObject is Actor actor)
+                    node.Text = $"{actor.Name} ({Utilities.Utils.GetPropertyNameUI(sceneObject.GetType().Name)})";
+                else
+                    node.Text = Utilities.Utils.GetPropertyNameUI(sceneObject.GetType().Name);
             }
             // Array Item
             else if (editor.ParentEditor is CollectionEditor)
@@ -268,7 +264,12 @@ namespace FlaxEditor.CustomEditors.Dedicated
             // Common type
             else if (editor.Values.Info != ScriptMemberInfo.Null)
             {
-                node.Text = Utilities.Utils.GetPropertyNameUI(editor.Values.Info.Name);
+                if (editor.Values.GetAttributes().FirstOrDefault(x => x is EditorDisplayAttribute) is EditorDisplayAttribute editorDisplayAttribute
+                    && !string.IsNullOrEmpty(editorDisplayAttribute.Name)
+                    && !editorDisplayAttribute.Name.Contains("_inline"))
+                    node.Text = $"{Utilities.Utils.GetPropertyNameUI(editorDisplayAttribute.Name)} ({Utilities.Utils.GetPropertyNameUI(editor.Values.Info.Name)})";
+                else
+                    node.Text = Utilities.Utils.GetPropertyNameUI(editor.Values.Info.Name);
             }
             // Custom type
             else if (editor.Values[0] != null)
@@ -316,7 +317,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 var childEditor = editor.ChildrenEditors[i];
 
                 // Special case for root actor transformation (can be applied only in Prefab editor, not in Level)
-                if (isActorEditorInLevel && childEditor.Values.Info.Name is "LocalPosition" or "LocalOrientation" or "LocalScale")
+                if (isActorEditorInLevel && childEditor.Values.Info.Name is "LocalPosition" or "LocalOrientation" or "LocalScale" or "Name")
                     continue;
 
                 var child = ProcessDiff(childEditor, !isScriptEditorWithRefValue);
@@ -361,13 +362,39 @@ namespace FlaxEditor.CustomEditors.Dedicated
             return result;
         }
 
+        private TreeNode CreateDiffTree(Actor actor, CustomEditorPresenter presenter, LayoutElementsContainer layout)
+        {
+            var actorNode = Editor.Instance.Scene.GetActorNode(actor);
+            ValueContainer vc = new ValueContainer(ScriptMemberInfo.Null);
+            vc.SetType(new ScriptType(actorNode.EditableObject.GetType()));
+            vc.Add(actorNode.EditableObject);
+            var editor = CustomEditorsUtil.CreateEditor(vc, null, false);
+            editor.Initialize(presenter, layout, vc);
+            var node = ProcessDiff(editor, false);
+            layout.ClearLayout();
+            foreach (var child in actor.Children)
+            {
+                var childNode = CreateDiffTree(child, presenter, layout);
+                if (childNode == null)
+                    continue;
+                if (node == null)
+                    node = CreateDiffNode(editor);
+                node.AddChild(childNode);
+            }
+            return node;
+        }
+
         private void ViewChanges(Control target, Float2 targetLocation)
         {
             // Build a tree out of modified properties
-            var rootNode = ProcessDiff(this, false);
+            var thisActor = (Actor)Values[0];
+            var rootActor = thisActor.IsPrefabRoot ? thisActor : thisActor.GetPrefabRoot();
+            var presenter = new CustomEditorPresenter(null);
+            var layout = new CustomElementsContainer<ContainerControl>();
+            var rootNode = CreateDiffTree(rootActor, presenter, layout);
 
             // Skip if no changes detected
-            if (rootNode == null || rootNode.ChildrenCount == 0)
+            if (rootNode == null)
             {
                 var cm1 = new ContextMenu();
                 cm1.AddButton("No changes detected");

Source/Editor/CustomEditors/Dedicated/AudioSourceEditor.cs

@@ -28,7 +28,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 _infoLabel = playbackGroup.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
 
-                var grid = playbackGroup.CustomContainer<UniformGridPanel>();
+                var grid = playbackGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/CustomEditors/Dedicated/ClothEditor.cs

@@ -59,7 +59,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             var paintValue = new ReadOnlyValueContainer(new ScriptType(typeof(ClothPaintingGizmoMode)), _gizmoMode);
             paintGroup.Object(paintValue);
             {
-                var grid = paintGroup.CustomContainer<UniformGridPanel>();
+                var grid = paintGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/CustomEditors/Dedicated/LayersMatrixEditor.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Wojciech Figat. All rights reserved.
 
-using System;
 using System.Collections.Generic;
 using FlaxEditor.Content.Settings;
 using FlaxEngine;
@@ -16,6 +15,11 @@ namespace FlaxEditor.CustomEditors.Dedicated
     {
         private int _layersCount;
         private List<CheckBox> _checkBoxes;
+        private VerticalPanel _upperRightCell;
+        private VerticalPanel _bottomLeftCell;
+        private UniformGridPanel _grid;
+        private Border _horizontalHighlight;
+        private Border _verticalHighlight;
 
         /// <inheritdoc />
         public override DisplayStyle Style => DisplayStyle.InlineIntoParent;
@@ -37,12 +41,29 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 Parent = panel,
             };
 
+            var style = FlaxEngine.GUI.Style.Current;
+            _horizontalHighlight = new Border()
+            {
+                Parent = panel,
+                BorderColor = style.Foreground,
+                BorderWidth = 1.0f,
+                Visible = false,
+            };
+
+            _verticalHighlight = new Border()
+            {
+                Parent = panel,
+                BorderColor = style.Foreground,
+                BorderWidth = 1.0f,
+                Visible = false,
+            };
+
             var upperLeftCell = new Label
             {
                 Parent = gridPanel,
             };
 
-            var upperRightCell = new VerticalPanel
+            _upperRightCell = new VerticalPanel
             {
                 ClipChildren = false,
                 Pivot = new Float2(0.00001f, 0.0f),
@@ -54,7 +75,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 Parent = gridPanel,
             };
 
-            var bottomLeftCell = new VerticalPanel
+            _bottomLeftCell = new VerticalPanel
             {
                 Pivot = Float2.Zero,
                 Spacing = 0,
@@ -63,7 +84,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 Parent = gridPanel,
             };
 
-            var grid = new UniformGridPanel(0)
+            _grid = new UniformGridPanel(0)
             {
                 SlotsHorizontally = layersCount,
                 SlotsVertically = layersCount,
@@ -74,13 +95,13 @@ namespace FlaxEditor.CustomEditors.Dedicated
             int layerIndex = 0;
             for (; layerIndex < layerNames.Length; layerIndex++)
             {
-                upperRightCell.AddChild(new Label
+                _upperRightCell.AddChild(new Label
                 {
                     Height = labelsHeight,
                     Text = layerNames[layerNames.Length - layerIndex - 1],
                     HorizontalAlignment = TextAlignment.Near,
                 });
-                bottomLeftCell.AddChild(new Label
+                _bottomLeftCell.AddChild(new Label
                 {
                     Height = labelsHeight,
                     Text = layerNames[layerIndex],
@@ -90,13 +111,13 @@ namespace FlaxEditor.CustomEditors.Dedicated
             for (; layerIndex < layersCount; layerIndex++)
             {
                 string name = "Layer " + layerIndex;
-                upperRightCell.AddChild(new Label
+                _upperRightCell.AddChild(new Label
                 {
                     Height = labelsHeight,
                     Text = name,
                     HorizontalAlignment = TextAlignment.Near,
                 });
-                bottomLeftCell.AddChild(new Label
+                _bottomLeftCell.AddChild(new Label
                 {
                     Height = labelsHeight,
                     Text = name,
@@ -118,7 +139,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                     var box = new CheckBox(0, 0, true)
                     {
                         Tag = new Float2(_layersCount - column - 1, row),
-                        Parent = grid,
+                        Parent = _grid,
                         Checked = GetBit(column, row),
                     };
                     box.StateChanged += OnCheckBoxChanged;
@@ -126,7 +147,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 }
                 for (; column < layersCount; column++)
                 {
-                    grid.AddChild(new Label());
+                    _grid.AddChild(new Label());
                 }
             }
         }
@@ -141,6 +162,18 @@ namespace FlaxEditor.CustomEditors.Dedicated
         /// <inheritdoc />
         public override void Refresh()
         {
+            int selectedColumn = -1;
+            int selectedRow = -1;
+            var style = FlaxEngine.GUI.Style.Current;
+            bool mouseOverGrid = _grid.IsMouseOver;
+
+            // Only hide highlights if mouse is not over the grid to reduce flickering
+            if (!mouseOverGrid)
+            {
+                _horizontalHighlight.Visible = false;
+                _verticalHighlight.Visible = false;
+            }
+
             // Sync check boxes
             for (int i = 0; i < _checkBoxes.Count; i++)
             {
@@ -148,6 +181,39 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 int column = (int)((Float2)box.Tag).X;
                 int row = (int)((Float2)box.Tag).Y;
                 box.Checked = GetBit(column, row);
+                                
+                if (box.IsMouseOver)
+                {
+                    selectedColumn = column;
+                    selectedRow = row;
+
+                    _horizontalHighlight.X = _grid.X - _bottomLeftCell.Width;
+                    _horizontalHighlight.Y = _grid.Y + box.Y;
+                    _horizontalHighlight.Width = _bottomLeftCell.Width + box.Width + box.X;
+                    _horizontalHighlight.Height = box.Height;
+                    _horizontalHighlight.Visible = true;
+
+                    _verticalHighlight.X = _grid.X + box.X;
+                    _verticalHighlight.Y = _grid.Y - _upperRightCell.Height;
+                    _verticalHighlight.Width = box.Width;
+                    _verticalHighlight.Height = _upperRightCell.Height + box.Height + box.Y;
+                    _verticalHighlight.Visible = true;
+                }
+            }
+
+            for (int i = 0; i < _checkBoxes.Count; i++)
+            {
+                var box = _checkBoxes[i];
+                int column = (int)((Float2)box.Tag).X;
+                int row = (int)((Float2)box.Tag).Y;
+
+                if (!mouseOverGrid)
+                    box.ImageColor = style.BorderSelected;
+                else if (selectedColumn > -1 && selectedRow > -1)
+                {
+                    bool isRowOrColumn = column == selectedColumn || row == selectedRow;
+                    box.ImageColor = style.BorderSelected * (isRowOrColumn ? 1.2f : 0.75f);
+                }
             }
         }
 

Source/Editor/CustomEditors/Dedicated/LocalizationSettingsEditor.cs

@@ -92,12 +92,14 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
                 // Update add button
                 var update = group.Button("Update").Button;
+                group.Space(0);
                 update.TooltipText = "Refreshes the dashboard statistics";
                 update.Height = 16.0f;
                 update.Clicked += RebuildLayout;
 
                 // New locale add button
                 var addLocale = group.Button("Add Locale...").Button;
+                group.Space(0);
                 addLocale.TooltipText = "Shows a locale picker and creates new localization for it with not translated string tables";
                 addLocale.Height = 16.0f;
                 addLocale.ButtonClicked += delegate(Button button)
@@ -167,12 +169,14 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
                 // Export button
                 var exportLocalization = group.Button("Export...").Button;
+                group.Space(0);
                 exportLocalization.TooltipText = "Exports the localization strings into .pot file for translation";
                 exportLocalization.Height = 16.0f;
                 exportLocalization.Clicked += () => Export(tableEntries, allKeys);
 
                 // Find localized strings in code button
                 var findStringsCode = group.Button("Find localized strings in code").Button;
+                group.Space(0);
                 findStringsCode.TooltipText = "Searches for localized string usage in inside a project source files";
                 findStringsCode.Height = 16.0f;
                 findStringsCode.Clicked += delegate
@@ -186,12 +190,12 @@ namespace FlaxEditor.CustomEditors.Dedicated
                     foreach (var file in files)
                         FindNewKeysCSharp(file, newKeys, allKeys);
 
-                    // C++
+                    // C/C++
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories);
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.c", SearchOption.AllDirectories)).ToArray();
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories);
+                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.h", SearchOption.AllDirectories).Concat(Directory.GetFiles(Globals.ProjectSourceFolder, "*.hpp", SearchOption.AllDirectories)).ToArray();;
                     filesCount += files.Length;
                     foreach (var file in files)
                         FindNewKeysCpp(file, newKeys, allKeys);

Source/Editor/CustomEditors/Dedicated/ModelPrefabEditor.cs

@@ -54,7 +54,8 @@ public class ModelPrefabEditor : GenericEditor
         }
 
         // Creates the import path UI
-        Utilities.Utils.CreateImportPathUI(layout, modelPrefab.ImportPath, false);
+        var group = layout.Group("Import Path");
+        Utilities.Utils.CreateImportPathUI(group, modelPrefab.ImportPath);
 
         var button = layout.Button("Reimport", "Reimports the source asset as prefab.");
         _reimportButton = button.Button;

Source/Editor/CustomEditors/Dedicated/ParticleEffectEditor.cs

@@ -92,7 +92,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 _infoLabel = playbackGroup.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
 
-                var grid = playbackGroup.CustomContainer<UniformGridPanel>();
+                var grid = playbackGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/CustomEditors/Dedicated/RagdollEditor.cs

@@ -39,7 +39,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             if (ragdoll.Parent is AnimatedModel animatedModel && animatedModel.SkinnedModel)
             {
                 // Builder
-                var grid = editorGroup.CustomContainer<UniformGridPanel>();
+                var grid = editorGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;
@@ -53,7 +53,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             if (Presenter.Owner != null)
             {
                 // Selection
-                var grid = editorGroup.CustomContainer<UniformGridPanel>();
+                var grid = editorGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/CustomEditors/Dedicated/RigidBodyEditor.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Wojciech Figat. All rights reserved.
 
 using System.Collections.Generic;
+using System.Reflection.Emit;
 using FlaxEditor.CustomEditors.GUI;
 using FlaxEngine;
 using FlaxEngine.GUI;
@@ -93,8 +94,10 @@ namespace FlaxEditor.CustomEditors.Dedicated
             // Add info box
             if (IsSingleObject && Values[0] is RigidBody && Editor.IsPlayMode)
             {
-                _infoLabel = layout.Label(string.Empty).Label;
+                var group = layout.Group("Info");
+                _infoLabel = group.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
+                _infoLabel.Margin = new Margin(3);
             }
         }
     }

Source/Editor/CustomEditors/Dedicated/SceneAnimationPlayerEditor.cs

@@ -28,7 +28,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 _infoLabel = playbackGroup.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
 
-                var grid = playbackGroup.CustomContainer<UniformGridPanel>();
+                var grid = playbackGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/CustomEditors/Dedicated/UIControlEditor.cs

@@ -682,7 +682,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
         private CustomElementsContainer<UniformGridPanel> UniformGridTwoByOne(LayoutElementsContainer cont)
         {
-            var grid = cont.CustomContainer<UniformGridPanel>();
+            var grid = cont.UniformGrid();
             grid.CustomControl.SlotsHorizontally = 2;
             grid.CustomControl.SlotsVertically = 1;
             grid.CustomControl.SlotPadding = Margin.Zero;

Source/Editor/CustomEditors/Editors/ActorTransformEditor.cs

@@ -43,11 +43,7 @@ namespace FlaxEditor.CustomEditors.Editors
                 base.Initialize(layout);
 
                 if (XElement.ValueBox.Parent is UniformGridPanel ug)
-                {
+                    CheckLayout(ug);
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
@@ -75,11 +71,7 @@ namespace FlaxEditor.CustomEditors.Editors
                 base.Initialize(layout);
                 
                 if (XElement.ValueBox.Parent is UniformGridPanel ug)
-                {
+                    CheckLayout(ug);
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
@@ -138,11 +130,7 @@ namespace FlaxEditor.CustomEditors.Editors
                 }
 
                 if (XElement.ValueBox.Parent is UniformGridPanel ug)
-                {
+                    CheckLayout(ug);
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
@@ -203,5 +191,13 @@ namespace FlaxEditor.CustomEditors.Editors
                 _linkButton.TooltipText = LinkValues ? "Unlinks scale components from uniform scaling" : "Links scale components for uniform scaling";
             }
         }
+
+        private static void CheckLayout(UniformGridPanel ug)
+        {
+            // Enlarge to fix border visibility
+            ug.Height += 2;
+            ug.SlotSpacing += new Float2(2);
+            ug.SlotPadding += new Margin(0, 0, 1, 1);
+        }
     }
 }

Source/Editor/CustomEditors/Editors/CollectionEditor.cs

@@ -642,10 +642,10 @@ namespace FlaxEditor.CustomEditors.Editors
             if (_canResize && !_readOnly)
             {
                 var panel = dragArea.HorizontalPanel();
-                panel.Panel.Size = new Float2(0, 20);
+                panel.Panel.Size = new Float2(0, 18);
-                panel.Panel.Margin = new Margin(2);
+                panel.Panel.Margin = new Margin(0, 0, Utilities.Constants.UIMargin, 0);
 
-                var removeButton = panel.Button("-", "Remove last item");
+                var removeButton = panel.Button("-", "Remove the last item");
                 removeButton.Button.Size = new Float2(16, 16);
                 removeButton.Button.Enabled = size > _minCount;
                 removeButton.Button.AnchorPreset = AnchorPresets.TopRight;
@@ -656,7 +656,7 @@ namespace FlaxEditor.CustomEditors.Editors
                     Resize(Count - 1);
                 };
 
-                var addButton = panel.Button("+", "Add new item");
+                var addButton = panel.Button("+", "Add a new item");
                 addButton.Button.Size = new Float2(16, 16);
                 addButton.Button.Enabled = (!NotNullItems || size > 0) && size < _maxCount;
                 addButton.Button.AnchorPreset = AnchorPresets.TopRight;

Source/Editor/CustomEditors/Editors/ColorTrackball.cs

@@ -27,7 +27,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            float trackBallSize = 80.0f;
+            float trackBallSize = 100f;
             float margin = 4.0f;
 
             // Panel
@@ -50,7 +50,7 @@ namespace FlaxEditor.CustomEditors.Editors
 
             // Scale editor
             {
-                var grid = masterPanel.CustomContainer<UniformGridPanel>();
+                var grid = masterPanel.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.SlotPadding = new Margin(4, 2, 2, 2);
                 gridControl.ClipChildren = false;

Source/Editor/CustomEditors/Editors/IBrushEditor.cs

@@ -26,6 +26,7 @@ namespace FlaxEditor.CustomEditors.Editors
             new OptionType("Texture 9-Slicing", typeof(Texture9SlicingBrush)),
             new OptionType("Sprite 9-Slicing", typeof(Sprite9SlicingBrush)),
             new OptionType("Video", typeof(VideoBrush)),
+            new OptionType("UI Brush", typeof(UIBrush)),
         };
     }
 }

Source/Editor/CustomEditors/Editors/LocalizedStringEditor.cs

@@ -21,6 +21,7 @@ namespace FlaxEditor.CustomEditors.Editors
     public sealed class LocalizedStringEditor : GenericEditor
     {
         private TextBoxElement _idElement, _valueElement;
+        private Button _viewStringButton;
 
         /// <inheritdoc />
         public override DisplayStyle Style => DisplayStyle.Inline;
@@ -70,6 +71,21 @@ namespace FlaxEditor.CustomEditors.Editors
             };
             addString.SetAnchorPreset(AnchorPresets.MiddleRight, false, true);
             addString.ButtonClicked += OnAddStringClicked;
+
+            var viewString = new Button
+            {
+                Visible = false,
+                Width = 16.0f,
+                BackgroundColor = Color.White,
+                BackgroundColorHighlighted = Color.Gray,
+                BackgroundBrush = new SpriteBrush(Editor.Instance.Icons.Search12),
+                TooltipText = "Find localized text in Localized String Table asset for the current locale...",
+                Parent = valueElement.TextBox,
+            };
+            viewString.SetAnchorPreset(AnchorPresets.MiddleRight, false, true);
+            viewString.LocalX -= 16.0f;
+            viewString.ButtonClicked += OnViewStringClicked;
+            _viewStringButton = viewString;
         }
 
         /// <inheritdoc />
@@ -80,6 +96,7 @@ namespace FlaxEditor.CustomEditors.Editors
             if (_valueElement != null)
             {
                 _valueElement.TextBox.WatermarkText = Localization.GetString(_idElement.Text);
+                _viewStringButton.Visible = !string.IsNullOrEmpty(_valueElement.TextBox.WatermarkText);
             }
         }
 
@@ -92,14 +109,21 @@ namespace FlaxEditor.CustomEditors.Editors
             _valueElement = null;
         }
 
-        private void OnSelectStringClicked(Button button)
+        private bool GetSettings(out LocalizationSettings settings)
         {
-            var settings = GameSettings.Load<LocalizationSettings>();
+            settings = GameSettings.Load<LocalizationSettings>();
             if (settings?.LocalizedStringTables == null || settings.LocalizedStringTables.Length == 0)
             {
                 MessageBox.Show("No valid localization settings setup.");
-                return;
+                return true;
             }
+            return false;
+        }
+
+        private void OnSelectStringClicked(Button button)
+        {
+            if (GetSettings(out var settings))
+                return;
             Profiler.BeginEvent("LocalizedStringEditor.OnSelectStringClicked");
             var allKeys = new HashSet<string>();
             for (int i = 0; i < settings.LocalizedStringTables.Length; i++)
@@ -136,6 +160,7 @@ namespace FlaxEditor.CustomEditors.Editors
                 {
                     menu.Hide();
                     _idElement.TextBox.SetTextAsUser(after[0].Text);
+                    _valueElement.TextBox.SetTextAsUser(string.Empty);
                 }
             };
             searchBox.TextChanged += delegate
@@ -158,12 +183,8 @@ namespace FlaxEditor.CustomEditors.Editors
 
         private void OnAddStringClicked(Button button)
         {
-            var settings = GameSettings.Load<LocalizationSettings>();
+            if (GetSettings(out var settings))
-            if (settings?.LocalizedStringTables == null || settings.LocalizedStringTables.Length == 0)
-            {
-                MessageBox.Show("No valid localization settings setup.");
                 return;
-            }
             Profiler.BeginEvent("LocalizedStringEditor.OnAddStringClicked");
             var allKeys = new HashSet<string>();
             for (int i = 0; i < settings.LocalizedStringTables.Length; i++)
@@ -231,5 +252,30 @@ namespace FlaxEditor.CustomEditors.Editors
             _idElement.TextBox.SetTextAsUser(newKey);
             Profiler.EndEvent();
         }
+
+        private void OnViewStringClicked(Button button)
+        {
+            if (GetSettings(out var settings))
+                return;
+            var id = _idElement.TextBox.Text;
+            var value = _valueElement.TextBox.WatermarkText;
+            for (int i = 0; i < settings.LocalizedStringTables.Length; i++)
+            {
+                var table = settings.LocalizedStringTables[i];
+                if (table && !table.WaitForLoaded())
+                {
+                    var entries = table.Entries;
+                    if (entries.TryGetValue(id, out var messages))
+                    {
+                        if (messages.Length != 0 && messages[0] == value)
+                        {
+                            Editor.Instance.ContentEditing.Open(table);
+                            return;
+                        }
+                    }
+                }
+            }
+            MessageBox.Show("Unable to find localized string table.");
+        }
     }
 }

Source/Editor/CustomEditors/Editors/QuaternionEditor.cs

@@ -46,7 +46,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;

Source/Editor/CustomEditors/Editors/StringEditor.cs

@@ -35,7 +35,7 @@ namespace FlaxEditor.CustomEditors.Editors
             }
 
             _element = layout.TextBox(isMultiLine);
-            _defaultWatermarkColor = _element.TextBox.WatermarkTextColor;
+            _watermarkColor = _defaultWatermarkColor = _element.TextBox.WatermarkTextColor;
             if (watermarkAttribute is WatermarkAttribute watermark)
             {
                 _watermarkText = watermark.WatermarkText;

Source/Editor/CustomEditors/Editors/TagEditor.cs

@@ -604,6 +604,9 @@ namespace FlaxEditor.CustomEditors.Editors
             root.SortChildrenRecursive();
             root.Expand(true);
 
+            if (Input.GetKey(KeyboardKeys.Shift))
+                root.ExpandAll(true);
+
             return menu;
         }
     }

Source/Editor/CustomEditors/Editors/Vector2Editor.cs

@@ -42,7 +42,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -131,7 +131,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -220,7 +220,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;

Source/Editor/CustomEditors/Editors/Vector3Editor.cs

@@ -82,7 +82,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -469,7 +469,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -783,7 +783,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;

Source/Editor/CustomEditors/Editors/Vector4Editor.cs

@@ -52,7 +52,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -163,7 +163,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;
@@ -274,7 +274,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;

Source/Editor/CustomEditors/Editors/VersionEditor.cs

@@ -39,7 +39,7 @@ namespace FlaxEditor.CustomEditors.Editors
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
-            var grid = layout.CustomContainer<UniformGridPanel>();
+            var grid = layout.UniformGrid();
             var gridControl = grid.CustomControl;
             gridControl.ClipChildren = false;
             gridControl.Height = TextBox.DefaultHeight;

Source/Editor/CustomEditors/Elements/Container/GroupElement.cs

@@ -22,7 +22,8 @@ namespace FlaxEditor.CustomEditors.Elements
             ArrowImageClosed = new SpriteBrush(Style.Current.ArrowRight),
             ArrowImageOpened = new SpriteBrush(Style.Current.ArrowDown),
             EnableDropDownIcon = true,
-            ItemsMargin = new Margin(7, 7, 3, 3),
+            ItemsMargin = new Margin(Utilities.Constants.UIMargin),
+            ItemsSpacing = Utilities.Constants.UIMargin,
             HeaderHeight = 18.0f,
             EnableContainmentLines = true,
         };

Source/Editor/CustomEditors/GUI/PropertiesList.cs

@@ -20,13 +20,6 @@ namespace FlaxEditor.CustomEditors.GUI
         /// </summary>
         public const int SplitterSize = 2;
 
-        /// <summary>
-        /// The splitter margin (in pixels).
-        /// </summary>
-        public const int SplitterMargin = 4;
-
-        private const int SplitterSizeHalf = SplitterSize / 2;
-
         private PropertiesListElement _element;
         private float _splitterValue;
         private Rectangle _splitterRect;
@@ -65,16 +58,18 @@ namespace FlaxEditor.CustomEditors.GUI
         /// <param name="element">The element.</param>
         public PropertiesList(PropertiesListElement element)
         {
+            ClipChildren = false;
             _element = element;
             _splitterValue = 0.4f;
-            BottomMargin = TopMargin = RightMargin = SplitterMargin;
+            Margin = new Margin();
+            Spacing = Utilities.Constants.UIMargin;
             UpdateSplitRect();
         }
 
         private void UpdateSplitRect()
         {
-            _splitterRect = new Rectangle(Mathf.Clamp(_splitterValue * Width - SplitterSizeHalf, 0.0f, Width), 0, SplitterSize, Height);
+            _splitterRect = new Rectangle(Mathf.Clamp(_splitterValue * Width - SplitterSize * 0.5f, 0.0f, Width), 0, SplitterSize, Height);
-            LeftMargin = _splitterValue * Width + SplitterMargin;
+            LeftMargin = _splitterValue * Width + _spacing;
         }
 
         private void StartTracking()
@@ -222,23 +217,33 @@ namespace FlaxEditor.CustomEditors.GUI
         /// <inheritdoc />
         protected override void PerformLayoutAfterChildren()
         {
-            // Sort controls from up to down into two columns: one for labels and one for the rest of the stuff
+            // Place non-label controls from top to down
-
             float y = _margin.Top;
             float w = Width - _margin.Width;
+            bool firstItem = true;
             for (int i = 0; i < _children.Count; i++)
             {
                 Control c = _children[i];
                 if (!(c is PropertyNameLabel))
                 {
-                    var h = c.Height;
+                    var rect = new Rectangle(_margin.Left, y, w, c.Height);
-                    c.Bounds = new Rectangle(_margin.Left, y + _spacing, w, h);
+                    if (c.Visible)
+                    {
+                        if (firstItem)
+                            firstItem = false;
+                        else
+                            rect.Y += _spacing;
+                    }
+                    else if (!firstItem)
+                        rect.Y += _spacing;
+                    c.Bounds = rect;
                     if (c.Visible)
                         y = c.Bottom;
                 }
             }
             y += _margin.Bottom;
 
+            // Place labels accordingly to their respective controls placement
             float namesWidth = _splitterValue * Width;
             int count = _element.Labels.Count;
             float[] yStarts = new float[count + 1];
@@ -271,7 +276,9 @@ namespace FlaxEditor.CustomEditors.GUI
             {
                 var label = _element.Labels[i];
 
-                var rect = new Rectangle(0, yStarts[i] + 1, namesWidth, yStarts[i + 1] - yStarts[i] - 2);
+                var rect = new Rectangle(0, yStarts[i], namesWidth, yStarts[i + 1] - yStarts[i]);
+                if (i != count - 1)
+                    rect.Height -= _spacing;
                 //label.Parent = this;
                 label.Bounds = rect;
             }

Source/Editor/CustomEditors/LayoutElementsContainer.cs

@@ -202,6 +202,17 @@ namespace FlaxEditor.CustomEditors
             return element;
         }
 
+        /// <summary>
+        /// Adds new uniform grid control.
+        /// </summary>
+        /// <returns>The created element.</returns>
+        public CustomElementsContainer<UniformGridPanel> UniformGrid()
+        {
+            var grid = CustomContainer<UniformGridPanel>();
+            grid.CustomControl.SlotSpacing = new Float2(Utilities.Constants.UIMargin);
+            return grid;
+        }
+
         /// <summary>
         /// Adds new custom element.
         /// </summary>
@@ -276,10 +287,7 @@ namespace FlaxEditor.CustomEditors
         /// <returns>The created element.</returns>
         public ImageElement Image(SpriteHandle sprite)
         {
-            var element = new ImageElement();
+            return Image(new SpriteBrush(sprite));
-            element.Image.Brush = new SpriteBrush(sprite);
-            OnAddElement(element);
-            return element;
         }
 
         /// <summary>
@@ -289,10 +297,7 @@ namespace FlaxEditor.CustomEditors
         /// <returns>The created element.</returns>
         public ImageElement Image(Texture texture)
         {
-            var element = new ImageElement();
+            return Image(new TextureBrush(texture));
-            element.Image.Brush = new TextureBrush(texture);
-            OnAddElement(element);
-            return element;
         }
 
         /// <summary>
@@ -301,9 +306,19 @@ namespace FlaxEditor.CustomEditors
         /// <param name="texture">The GPU texture.</param>
         /// <returns>The created element.</returns>
         public ImageElement Image(GPUTexture texture)
+        {
+            return Image(new GPUTextureBrush(texture));
+        }
+
+        /// <summary>
+        /// Adds brush image to the layout.
+        /// </summary>
+        /// <param name="brush">The brush.</param>
+        /// <returns>The created element.</returns>
+        public ImageElement Image(IBrush brush)
         {
             var element = new ImageElement();
-            element.Image.Brush = new GPUTextureBrush(texture);
+            element.Image.Brush = brush;
             OnAddElement(element);
             return element;
         }

Source/Editor/Editor.cpp

@@ -20,6 +20,7 @@
 #include "Engine/Engine/Engine.h"
 #include "Engine/ShadowsOfMordor/Builder.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "FlaxEngine.Gen.h"
 #if PLATFORM_LINUX
 #include "Engine/Tools/TextureTool/TextureTool.h"
@@ -47,6 +48,7 @@ void Editor::CloseSplashScreen()
 
 bool Editor::CheckProjectUpgrade()
 {
+    PROFILE_MEM(Editor);
     const auto versionFilePath = Globals::ProjectCacheFolder / TEXT("version");
 
     // Load version cache file
@@ -366,6 +368,8 @@ bool Editor::BackupProject()
 
 int32 Editor::LoadProduct()
 {
+    PROFILE_MEM(Editor);
+
     // Flax Editor product
     Globals::ProductName = TEXT("Flax Editor");
     Globals::CompanyName = TEXT("Flax");
@@ -626,6 +630,7 @@ int32 Editor::LoadProduct()
 
 Window* Editor::CreateMainWindow()
 {
+    PROFILE_MEM(Editor);
     Window* window = Managed->GetMainWindow();
 
 #if PLATFORM_LINUX
@@ -662,6 +667,7 @@ bool Editor::Init()
         return true;
     }
     PROFILE_CPU();
+    PROFILE_MEM(Editor);
 
     // If during last lightmaps baking engine crashed we could try to restore the progress
     ShadowsOfMordor::Builder::Instance()->CheckIfRestoreState();
@@ -693,11 +699,13 @@ bool Editor::Init()
 
 void Editor::BeforeRun()
 {
+    PROFILE_MEM(Editor);
     Managed->BeforeRun();
 }
 
 void Editor::BeforeExit()
 {
+    PROFILE_MEM(Editor);
     CloseSplashScreen();
 
     Managed->Exit();
@@ -708,6 +716,8 @@ void Editor::BeforeExit()
 
 void EditorImpl::OnUpdate()
 {
+    PROFILE_MEM(Editor);
+
     // Update c# editor
     Editor::Managed->Update();
 

Source/Editor/Editor.cs

@@ -670,6 +670,8 @@ namespace FlaxEditor
         {
             FlaxEngine.Networking.NetworkManager.Stop(); // Shutdown any multiplayer from playmode
             PlayModeEnding?.Invoke();
+            for (int i = 0; i < _modules.Count; i++)
+                _modules[i].OnPlayEnding();
         }
 
         internal void OnPlayEnd()
@@ -1031,6 +1033,8 @@ namespace FlaxEditor
             {
                 Internal_GetEditorBoxWithChildren(FlaxEngine.Object.GetUnmanagedPtr(actor), out var box);
                 BoundingSphere.FromBox(ref box, out sphere);
+                if (sphere == BoundingSphere.Empty)
+                    sphere = new BoundingSphere(actor.Position, sphere.Radius);
                 sphere.Radius = Math.Max(sphere.Radius, 15.0f);
             }
             else

Source/Editor/GUI/AssetPicker.cs

@@ -299,6 +299,7 @@ namespace FlaxEditor.GUI
                     {
                         // Select asset
                         Editor.Instance.Windows.ContentWin.Select(Validator.SelectedItem);
+                        Editor.Instance.Windows.ContentWin.ClearItemsSearch();
                     }
                 }
                 else if (Button1Rect.Contains(location))
@@ -312,6 +313,7 @@ namespace FlaxEditor.GUI
                     {
                         // Select asset
                         Editor.Instance.Windows.ContentWin.Select(Validator.SelectedItem);
+                        Editor.Instance.Windows.ContentWin.ClearItemsSearch();
                     }
                     else if (Button3Rect.Contains(location))
                     {

Source/Editor/GUI/ColumnDefinition.cs

@@ -51,7 +51,7 @@ namespace FlaxEditor.GUI
         /// <summary>
         /// The column title horizontal text alignment
         /// </summary>
-        public TextAlignment TitleAlignment = TextAlignment.Near;
+        public TextAlignment TitleAlignment = TextAlignment.Center;
 
         /// <summary>
         /// The column title margin.

Source/Editor/GUI/ContextMenu/ContextMenuBase.cs

@@ -1,7 +1,10 @@
-#if PLATFORM_WINDOWS
+#if PLATFORM_WINDOWS || PLATFORM_SDL
 #define USE_IS_FOREGROUND
 #else
 #endif
+#if PLATFORM_SDL
+#define USE_SDL_WORKAROUNDS
+#endif
 // Copyright (c) Wojciech Figat. All rights reserved.
 
 using System.Collections.Generic;
@@ -121,7 +124,7 @@ namespace FlaxEditor.GUI.ContextMenu
         }
 
         /// <summary>
-        /// Shows the empty menu popup o na screen.
+        /// Shows the empty menu popup on a screen.
         /// </summary>
         /// <param name="control">The target control.</param>
         /// <param name="area">The target control area to cover.</param>
@@ -256,7 +259,9 @@ namespace FlaxEditor.GUI.ContextMenu
                 desc.AllowMaximize = false;
                 desc.AllowDragAndDrop = false;
                 desc.IsTopmost = true;
-                desc.IsRegularWindow = false;
+                desc.Type = WindowType.Popup;
+                desc.Parent = parentWin.Window;
+                desc.Title = "ContextMenu";
                 desc.HasSizingFrame = false;
                 OnWindowCreating(ref desc);
                 _window = Platform.CreateWindow(ref desc);
@@ -266,6 +271,12 @@ namespace FlaxEditor.GUI.ContextMenu
                     _window.LostFocus += OnWindowLostFocus;
                 }
                 
+#if USE_IS_FOREGROUND && USE_SDL_WORKAROUNDS
+                // The focus between popup and parent windows doesn't change, force hide the popup when clicked on parent
+                parentWin.Window.MouseDown += OnWindowMouseDown;
+                _window.Closed += () => parentWin.Window.MouseDown -= OnWindowMouseDown;
+#endif
+
                 // Attach to the window
                 _parentCM = parent as ContextMenuBase;
                 Parent = _window.GUI;
@@ -285,6 +296,17 @@ namespace FlaxEditor.GUI.ContextMenu
             }
         }
 
+        private static void ForceDefocus(ContainerControl c)
+        {
+            foreach (var cc in c.Children)
+            {
+                if (cc.ContainsFocus)
+                    cc.Defocus();
+                if (cc is ContainerControl ccc)
+                    ForceDefocus(ccc);
+            }
+        }
+
         /// <summary>
         /// Hide popup menu and all child menus.
         /// </summary>
@@ -299,6 +321,9 @@ namespace FlaxEditor.GUI.ContextMenu
             // Close child
             HideChild();
 
+            // Force defocus
+            ForceDefocus(this);
+
             // Unlink from window
             Parent = null;
 
@@ -426,6 +451,17 @@ namespace FlaxEditor.GUI.ContextMenu
             }
         }
 
+#if USE_SDL_WORKAROUNDS
+        private void OnWindowGotFocus()
+        {
+        }
+        
+        private void OnWindowMouseDown(ref Float2 mousePosition, MouseButton button, ref bool handled)
+        {
+            // The user clicked outside the popup window
+            Hide();
+        }
+#else
         private void OnWindowGotFocus()
         {
             var child = _childCM;
@@ -439,6 +475,7 @@ namespace FlaxEditor.GUI.ContextMenu
                 });
             }
         }
+#endif
 
         private void OnWindowLostFocus()
         {
@@ -537,7 +574,12 @@ namespace FlaxEditor.GUI.ContextMenu
             // Let root context menu to check if none of the popup windows
             if (_parentCM == null && UseVisibilityControl && !IsForeground)
             {
+#if USE_SDL_WORKAROUNDS
+                if (!IsMouseOver)
+                    Hide();
+#else
                 Hide();
+#endif
             }
         }
 #endif

Source/Editor/GUI/Dialogs/ColorPickerDialog.cs

@@ -326,8 +326,11 @@ namespace FlaxEditor.GUI.Dialogs
             // Update eye dropper tool
             if (_activeEyedropper)
             {
+                // Try reading the color under the cursor in realtime if supported by the platform
                 Float2 mousePosition = Platform.MousePosition;
-                SelectedColor = ScreenUtilities.GetColorAt(mousePosition);
+                Color color = ScreenUtilities.GetColorAt(mousePosition);
+                if (color != Color.Transparent)
+                    SelectedColor = color;
             }
         }
 

Source/Editor/GUI/Docking/DockHintWindow.cs

@@ -1,545 +0,0 @@
-// Copyright (c) Wojciech Figat. All rights reserved.
-
-using System;
-using FlaxEngine;
-using FlaxEngine.GUI;
-
-namespace FlaxEditor.GUI.Docking
-{
-    /// <summary>
-    /// Helper class used to handle docking windows dragging and docking.
-    /// </summary>
-    public class DockHintWindow
-    {
-        private FloatWindowDockPanel _toMove;
-
-        private Float2 _dragOffset;
-        private Float2 _defaultWindowSize;
-        private Rectangle _rectDock;
-        private Rectangle _rectWindow;
-        private Float2 _mouse;
-        private DockState _toSet;
-        private DockPanel _toDock;
-        private bool _lateDragOffsetUpdate;
-
-        private Rectangle _rLeft, _rRight, _rBottom, _rUpper, _rCenter;
-
-        private DockHintWindow(FloatWindowDockPanel toMove)
-        {
-            _toMove = toMove;
-            _toSet = DockState.Float;
-            var window = toMove.Window.Window;
-
-            // Remove focus from drag target
-            _toMove.Focus();
-            _toMove.Defocus();
-
-            // Focus window
-            window.Focus();
-
-            // Check if window is maximized and restore window.
-            if (window.IsMaximized)
-            {
-                // Restore window and set position to mouse.
-                var mousePos = window.MousePosition;
-                var previousSize = window.Size;
-                window.Restore();
-                window.Position = Platform.MousePosition - mousePos * window.Size / previousSize;
-            }
-
-            // Calculate dragging offset and move window to the destination position
-            var mouseScreenPosition = Platform.MousePosition;
-
-            // If the _toMove window was not focused when initializing this window, the result vector only contains zeros
-            // and to prevent a failure, we need to perform an update for the drag offset at later time which will be done in the OnMouseMove event handler.
-            if (mouseScreenPosition != Float2.Zero)
-                CalculateDragOffset(mouseScreenPosition);
-            else
-                _lateDragOffsetUpdate = true;
-
-            // Get initial size
-            _defaultWindowSize = window.Size;
-
-            // Init proxy window
-            Proxy.Init(ref _defaultWindowSize);
-
-            // Bind events
-            Proxy.Window.MouseUp += OnMouseUp;
-            Proxy.Window.MouseMove += OnMouseMove;
-            Proxy.Window.LostFocus += OnLostFocus;
-
-            // Start tracking mouse
-            Proxy.Window.StartTrackingMouse(false);
-
-            // Update window GUI
-            Proxy.Window.GUI.PerformLayout();
-
-            // Update rectangles
-            UpdateRects();
-
-            // Hide base window
-            window.Hide();
-
-            // Enable hit window presentation
-            Proxy.Window.RenderingEnabled = true;
-            Proxy.Window.Show();
-            Proxy.Window.Focus();
-        }
-
-        /// <summary>
-        /// Releases unmanaged and - optionally - managed resources.
-        /// </summary>
-        public void Dispose()
-        {
-            // End tracking mouse
-            Proxy.Window.EndTrackingMouse();
-
-            // Disable rendering
-            Proxy.Window.RenderingEnabled = false;
-
-            // Unbind events
-            Proxy.Window.MouseUp -= OnMouseUp;
-            Proxy.Window.MouseMove -= OnMouseMove;
-            Proxy.Window.LostFocus -= OnLostFocus;
-
-            // Hide the proxy
-            Proxy.Hide();
-
-            if (_toMove == null)
-                return;
-
-            // Check if window won't be docked
-            if (_toSet == DockState.Float)
-            {
-                var window = _toMove.Window?.Window;
-                if (window == null)
-                    return;
-                var mouse = Platform.MousePosition;
-
-                // Move base window
-                window.Position = mouse - _dragOffset;
-
-                // Show base window
-                window.Show();
-            }
-            else
-            {
-                bool hasNoChildPanels = _toMove.ChildPanelsCount == 0;
-
-                // Check if window has only single tab
-                if (hasNoChildPanels && _toMove.TabsCount == 1)
-                {
-                    // Dock window
-                    _toMove.GetTab(0).Show(_toSet, _toDock);
-                }
-                // Check if dock as tab and has no child panels
-                else if (hasNoChildPanels && _toSet == DockState.DockFill)
-                {
-                    // Dock all tabs
-                    while (_toMove.TabsCount > 0)
-                    {
-                        _toMove.GetTab(0).Show(DockState.DockFill, _toDock);
-                    }
-                }
-                else
-                {
-                    var selectedTab = _toMove.SelectedTab;
-
-                    // Dock the first tab into the target location
-                    var firstTab = _toMove.GetTab(0);
-                    firstTab.Show(_toSet, _toDock);
-
-                    // Dock rest of the tabs
-                    while (_toMove.TabsCount > 0)
-                    {
-                        _toMove.GetTab(0).Show(DockState.DockFill, firstTab);
-                    }
-
-                    // Keep selected tab being selected
-                    selectedTab?.SelectTab();
-                }
-
-                // Focus target window
-                _toDock.Root.Focus();
-            }
-
-            _toMove = null;
-        }
-
-        /// <summary>
-        /// Creates the new dragging hit window.
-        /// </summary>
-        /// <param name="toMove">Floating dock panel to move.</param>
-        /// <returns>The dock hint window object.</returns>
-        public static DockHintWindow Create(FloatWindowDockPanel toMove)
-        {
-            if (toMove == null)
-                throw new ArgumentNullException();
-
-            return new DockHintWindow(toMove);
-        }
-
-        /// <summary>
-        /// Creates the new dragging hit window.
-        /// </summary>
-        /// <param name="toMove">Dock window to move.</param>
-        /// <returns>The dock hint window object.</returns>
-        public static DockHintWindow Create(DockWindow toMove)
-        {
-            if (toMove == null)
-                throw new ArgumentNullException();
-
-            // Show floating
-            toMove.ShowFloating();
-
-            // Move window to the mouse position (with some offset for caption bar)
-            var window = (WindowRootControl)toMove.Root;
-            var mouse = Platform.MousePosition;
-            window.Window.Position = mouse - new Float2(8, 8);
-
-            // Get floating panel
-            var floatingPanelToMove = window.GetChild(0) as FloatWindowDockPanel;
-
-            return new DockHintWindow(floatingPanelToMove);
-        }
-
-        /// <summary>
-        /// Calculates window rectangle in the dock window.
-        /// </summary>
-        /// <param name="state">Window dock state.</param>
-        /// <param name="rect">Dock panel rectangle.</param>
-        /// <returns>Calculated window rectangle.</returns>
-        public static Rectangle CalculateDockRect(DockState state, ref Rectangle rect)
-        {
-            Rectangle result = rect;
-            switch (state)
-            {
-            case DockState.DockFill:
-                result.Location.Y += DockPanel.DefaultHeaderHeight;
-                result.Size.Y -= DockPanel.DefaultHeaderHeight;
-                break;
-            case DockState.DockTop:
-                result.Size.Y *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockLeft:
-                result.Size.X *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockBottom:
-                result.Location.Y += result.Size.Y * (1 - DockPanel.DefaultSplitterValue);
-                result.Size.Y *= DockPanel.DefaultSplitterValue;
-                break;
-            case DockState.DockRight:
-                result.Location.X += result.Size.X * (1 - DockPanel.DefaultSplitterValue);
-                result.Size.X *= DockPanel.DefaultSplitterValue;
-                break;
-            }
-            return result;
-        }
-
-        private void CalculateDragOffset(Float2 mouseScreenPosition)
-        {
-            var baseWinPos = _toMove.Window.Window.Position;
-            _dragOffset = mouseScreenPosition - baseWinPos;
-        }
-
-        private void UpdateRects()
-        {
-            // Cache mouse position
-            _mouse = Platform.MousePosition;
-
-            // Check intersection with any dock panel
-            var uiMouse = _mouse;
-            _toDock = _toMove.MasterPanel.HitTest(ref uiMouse, _toMove);
-
-            // Check dock state to use
-            bool showProxyHints = _toDock != null;
-            bool showBorderHints = showProxyHints;
-            bool showCenterHint = showProxyHints;
-            if (showProxyHints)
-            {
-                // If moved window has not only tabs but also child panels disable docking as tab
-                if (_toMove.ChildPanelsCount > 0)
-                    showCenterHint = false;
-
-                // Disable docking windows with one or more dock panels inside
-                if (_toMove.ChildPanelsCount > 0)
-                    showBorderHints = false;
-
-                // Get dock area
-                _rectDock = _toDock.DockAreaBounds;
-
-                // Cache dock rectangles
-                var size = _rectDock.Size;
-                var offset = _rectDock.Location;
-                var borderMargin = 4.0f;
-                var hintWindowsSize = Proxy.HintWindowsSize * Platform.DpiScale;
-                var hintWindowsSize2 = hintWindowsSize * 0.5f;
-                var centerX = size.X * 0.5f;
-                var centerY = size.Y * 0.5f;
-                _rUpper = new Rectangle(centerX - hintWindowsSize2, borderMargin, hintWindowsSize, hintWindowsSize) + offset;
-                _rBottom = new Rectangle(centerX - hintWindowsSize2, size.Y - hintWindowsSize - borderMargin, hintWindowsSize, hintWindowsSize) + offset;
-                _rLeft = new Rectangle(borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-                _rRight = new Rectangle(size.X - hintWindowsSize - borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-                _rCenter = new Rectangle(centerX - hintWindowsSize2, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
-
-                // Hit test
-                DockState toSet = DockState.Float;
-                if (showBorderHints)
-                {
-                    if (_rUpper.Contains(_mouse))
-                        toSet = DockState.DockTop;
-                    else if (_rBottom.Contains(_mouse))
-                        toSet = DockState.DockBottom;
-                    else if (_rLeft.Contains(_mouse))
-                        toSet = DockState.DockLeft;
-                    else if (_rRight.Contains(_mouse))
-                        toSet = DockState.DockRight;
-                }
-                if (showCenterHint && _rCenter.Contains(_mouse))
-                    toSet = DockState.DockFill;
-                _toSet = toSet;
-
-                // Show proxy hint windows
-                Proxy.Down.Position = _rBottom.Location;
-                Proxy.Left.Position = _rLeft.Location;
-                Proxy.Right.Position = _rRight.Location;
-                Proxy.Up.Position = _rUpper.Location;
-                Proxy.Center.Position = _rCenter.Location;
-            }
-            else
-            {
-                _toSet = DockState.Float;
-            }
-
-            // Update proxy hint windows visibility
-            Proxy.Down.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Left.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Right.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Up.IsVisible = showProxyHints & showBorderHints;
-            Proxy.Center.IsVisible = showProxyHints & showCenterHint;
-
-            // Calculate proxy/dock/window rectangles
-            if (_toDock == null)
-            {
-                // Floating window over nothing
-                _rectWindow = new Rectangle(_mouse - _dragOffset, _defaultWindowSize);
-            }
-            else
-            {
-                if (_toSet == DockState.Float)
-                {
-                    // Floating window over dock panel
-                    _rectWindow = new Rectangle(_mouse - _dragOffset, _defaultWindowSize);
-                }
-                else
-                {
-                    // Use only part of the dock panel to show hint
-                    _rectWindow = CalculateDockRect(_toSet, ref _rectDock);
-                }
-            }
-
-            // Update proxy window
-            Proxy.Window.ClientBounds = _rectWindow;
-        }
-
-        private void OnMouseUp(ref Float2 location, MouseButton button, ref bool handled)
-        {
-            if (button == MouseButton.Left)
-            {
-                Dispose();
-            }
-        }
-
-        private void OnMouseMove(ref Float2 mousePos)
-        {
-            // Recalculate the drag offset because the current mouse screen position was invalid when we initialized the window
-            if (_lateDragOffsetUpdate)
-            {
-                // Calculate dragging offset and move window to the destination position
-                CalculateDragOffset(mousePos);
-
-                // Reset state
-                _lateDragOffsetUpdate = false;
-            }
-
-            UpdateRects();
-        }
-
-        private void OnLostFocus()
-        {
-            Dispose();
-        }
-
-        /// <summary>
-        /// Contains helper proxy windows shared across docking panels. They are used to visualize docking window locations.
-        /// </summary>
-        public static class Proxy
-        {
-            /// <summary>
-            /// The drag proxy window.
-            /// </summary>
-            public static Window Window;
-
-            /// <summary>
-            /// The left hint proxy window.
-            /// </summary>
-            public static Window Left;
-
-            /// <summary>
-            /// The right hint proxy window.
-            /// </summary>
-            public static Window Right;
-
-            /// <summary>
-            /// The up hint proxy window.
-            /// </summary>
-            public static Window Up;
-
-            /// <summary>
-            /// The down hint proxy window.
-            /// </summary>
-            public static Window Down;
-
-            /// <summary>
-            /// The center hint proxy window.
-            /// </summary>
-            public static Window Center;
-
-            /// <summary>
-            /// The hint windows size.
-            /// </summary>
-            public const float HintWindowsSize = 32.0f;
-
-            /// <summary>
-            /// Initializes the hit proxy windows. Those windows are used to indicate drag target areas (left, right, top, bottom, etc.).
-            /// </summary>
-            public static void InitHitProxy()
-            {
-                CreateProxy(ref Left, "DockHint.Left");
-                CreateProxy(ref Right, "DockHint.Right");
-                CreateProxy(ref Up, "DockHint.Up");
-                CreateProxy(ref Down, "DockHint.Down");
-                CreateProxy(ref Center, "DockHint.Center");
-            }
-
-            /// <summary>
-            /// Initializes the hint window.
-            /// </summary>
-            /// <param name="initSize">Initial size of the proxy window.</param>
-            public static void Init(ref Float2 initSize)
-            {
-                if (Window == null)
-                {
-                    var settings = CreateWindowSettings.Default;
-                    settings.Title = "DockHint.Window";
-                    settings.Size = initSize;
-                    settings.AllowInput = true;
-                    settings.AllowMaximize = false;
-                    settings.AllowMinimize = false;
-                    settings.HasBorder = false;
-                    settings.HasSizingFrame = false;
-                    settings.IsRegularWindow = false;
-                    settings.SupportsTransparency = true;
-                    settings.ShowInTaskbar = false;
-                    settings.ShowAfterFirstPaint = false;
-                    settings.IsTopmost = true;
-
-                    Window = Platform.CreateWindow(ref settings);
-                    Window.Opacity = 0.6f;
-                    Window.GUI.BackgroundColor = Style.Current.Selection;
-                    Window.GUI.AddChild<DragVisuals>();
-                }
-                else
-                {
-                    // Resize proxy
-                    Window.ClientSize = initSize;
-                }
-
-                InitHitProxy();
-            }
-
-            private sealed class DragVisuals : Control
-            {
-                public DragVisuals()
-                {
-                    AnchorPreset = AnchorPresets.StretchAll;
-                    Offsets = Margin.Zero;
-                }
-
-                public override void Draw()
-                {
-                    Render2D.DrawRectangle(new Rectangle(Float2.Zero, Size), Style.Current.SelectionBorder);
-                }
-            }
-
-            private static void CreateProxy(ref Window win, string name)
-            {
-                if (win != null)
-                    return;
-
-                var settings = CreateWindowSettings.Default;
-                settings.Title = name;
-                settings.Size = new Float2(HintWindowsSize * Platform.DpiScale);
-                settings.AllowInput = false;
-                settings.AllowMaximize = false;
-                settings.AllowMinimize = false;
-                settings.HasBorder = false;
-                settings.HasSizingFrame = false;
-                settings.IsRegularWindow = false;
-                settings.SupportsTransparency = true;
-                settings.ShowInTaskbar = false;
-                settings.ActivateWhenFirstShown = false;
-                settings.IsTopmost = true;
-                settings.ShowAfterFirstPaint = false;
-
-                win = Platform.CreateWindow(ref settings);
-                win.Opacity = 0.6f;
-                win.GUI.BackgroundColor = Style.Current.Selection;
-                win.GUI.AddChild<DragVisuals>();
-            }
-
-            /// <summary>
-            /// Hides proxy windows.
-            /// </summary>
-            public static void Hide()
-            {
-                HideProxy(ref Window);
-                HideProxy(ref Left);
-                HideProxy(ref Right);
-                HideProxy(ref Up);
-                HideProxy(ref Down);
-                HideProxy(ref Center);
-            }
-
-            private static void HideProxy(ref Window win)
-            {
-                if (win)
-                {
-                    win.Hide();
-                }
-            }
-
-            /// <summary>
-            /// Releases proxy data and windows.
-            /// </summary>
-            public static void Dispose()
-            {
-                DisposeProxy(ref Window);
-                DisposeProxy(ref Left);
-                DisposeProxy(ref Right);
-                DisposeProxy(ref Up);
-                DisposeProxy(ref Down);
-                DisposeProxy(ref Center);
-            }
-
-            private static void DisposeProxy(ref Window win)
-            {
-                if (win)
-                {
-                    win.Close(ClosingReason.User);
-                    win = null;
-                }
-            }
-        }
-    }
-}

Source/Editor/GUI/Docking/DockPanelProxy.cs

@@ -50,6 +50,11 @@ namespace FlaxEditor.GUI.Docking
         /// </summary>
         public Float2 MousePosition = Float2.Minimum;
         
+        /// <summary>
+        /// The mouse position.
+        /// </summary>
+        public Float2 MouseStartPosition = Float2.Minimum;
+
         /// <summary>
         /// The start drag asynchronous window.
         /// </summary>
@@ -165,7 +170,7 @@ namespace FlaxEditor.GUI.Docking
                 if (_panel.ChildPanelsCount == 0 && _panel.TabsCount == 1 && _panel.IsFloating)
                 {
                     // Create docking hint window but in an async manner
-                    DockHintWindow.Create(_panel as FloatWindowDockPanel);
+                    WindowDragHelper.StartDragging(_panel as FloatWindowDockPanel);
                 }
                 else
                 {
@@ -176,7 +181,7 @@ namespace FlaxEditor.GUI.Docking
                     _panel.SelectTab(index - 1);
 
                     // Create docking hint window
-                    DockHintWindow.Create(win);
+                    WindowDragHelper.StartDragging(win, _panel.RootWindow.Window);
                 }
             }
         }
@@ -355,6 +360,7 @@ namespace FlaxEditor.GUI.Docking
             if (IsSingleFloatingWindow)
                 return base.OnMouseDown(location, button);
             MouseDownWindow = GetTabAtPos(location, out IsMouseDownOverCross);
+            MouseStartPosition = location;
 
             // Check buttons
             if (button == MouseButton.Left)
@@ -441,6 +447,20 @@ namespace FlaxEditor.GUI.Docking
                         StartDrag(MouseDownWindow);
                     MouseDownWindow = null;
                 }
+                // Check if single tab is tried to be moved
+                else if (MouseDownWindow != null && _panel.TabsCount <= 1)
+                {
+                    if ((MousePosition - MouseStartPosition).Length > 3)
+                    {
+                        // Clear flag
+                        IsMouseLeftButtonDown = false;
+
+                        // Check tab under the mouse
+                        if (!IsMouseDownOverCross && MouseDownWindow != null)
+                            StartDrag(MouseDownWindow);
+                        MouseDownWindow = null;
+                    }
+                }
                 // Check if has more than one tab to change order
                 else if (MouseDownWindow != null && _panel.TabsCount > 1)
                 {

Source/Editor/GUI/Docking/DockWindow.cs

@@ -182,6 +182,25 @@ namespace FlaxEditor.GUI.Docking
         /// <param name="size">Window size, set <see cref="Float2.Zero"/> to use default.</param>
         /// <param name="position">Window location.</param>
         public void ShowFloating(Float2 location, Float2 size, WindowStartPosition position = WindowStartPosition.CenterParent)
+        {
+            CreateFloating(location, size, position, true);
+        }
+
+        /// <summary>
+        /// Creates the window in a floating state.
+        /// </summary>
+        public void CreateFloating()
+        {
+            CreateFloating(Float2.Zero, Float2.Zero);
+        }
+        /// <summary>
+        /// Creates the window in a floating state.
+        /// </summary>
+        /// <param name="location">Window location.</param>
+        /// <param name="size">Window size, set <see cref="Float2.Zero"/> to use default.</param>
+        /// <param name="position">Window location.</param>
+        /// <param name="showWindow">Window visibility.</param>
+        public void CreateFloating(Float2 location, Float2 size, WindowStartPosition position = WindowStartPosition.CenterParent, bool showWindow = false)
         {
             Undock();
 
@@ -199,14 +218,17 @@ namespace FlaxEditor.GUI.Docking
             windowGUI.UnlockChildrenRecursive();
             windowGUI.PerformLayout();
 
-            // Show
+            if (showWindow)
-            window.Show();
+            {
-            window.BringToFront();
+                // Show
-            window.Focus();
+                window.Show();
-            OnShow();
+                window.BringToFront();
+                window.Focus();
+                OnShow();
 
-            // Perform layout again
+                // Perform layout again
-            windowGUI.PerformLayout();
+                windowGUI.PerformLayout();
+            }
         }
 
         /// <summary>

Source/Editor/GUI/Docking/FloatWindowDockPanel.cs

@@ -11,6 +11,42 @@ namespace FlaxEditor.GUI.Docking
     /// <seealso cref="DockPanel" />
     public class FloatWindowDockPanel : DockPanel
     {
+        private class FloatWindowDecorations : WindowDecorations
+        {
+            private FloatWindowDockPanel _panel;
+            
+            public FloatWindowDecorations(FloatWindowDockPanel panel)
+            : base(panel.RootWindow)
+            {
+                _panel = panel;
+            }
+            
+            /// <inheritdoc />
+            public override bool OnMouseDown(Float2 location, MouseButton button)
+            {
+                if (Title.Bounds.Contains(location) && button == MouseButton.Left)
+                {
+                    _panel.BeginDrag();
+                    return true;
+                }
+                return base.OnMouseDown(location, button);
+            }
+
+#if !PLATFORM_WINDOWS
+            /// <inheritdoc />
+            protected override WindowHitCodes OnHitTest(ref Float2 mouse)
+            {
+                var hit = base.OnHitTest(ref mouse);
+                if (hit == WindowHitCodes.Caption)
+                {
+                    // Override the system behaviour when interacting with the caption area
+                    hit = WindowHitCodes.Client;
+                }
+                return hit;
+            }
+#endif
+        }
+
         private MasterDockPanel _masterPanel;
         private WindowRootControl _window;
 
@@ -40,6 +76,26 @@ namespace FlaxEditor.GUI.Docking
             Parent = window;
             _window.Window.Closing += OnClosing;
             _window.Window.LeftButtonHit += OnLeftButtonHit;
+            
+            if (Utilities.Utils.UseCustomWindowDecorations())
+            {
+                var decorations = Parent.AddChild(new FloatWindowDecorations(this));
+                decorations.SetAnchorPreset(AnchorPresets.HorizontalStretchTop, false);
+            }
+        }
+        
+        /// <inheritdoc />
+        protected override void PerformLayoutBeforeChildren()
+        {
+            base.PerformLayoutBeforeChildren();
+            
+            var decorations = Parent.GetChild<FloatWindowDecorations>();
+            if (decorations != null)
+            {
+                // Apply offset for the title bar
+                foreach (var child in Children)
+                    child.Bounds = child.Bounds with { Y = decorations.Height, Height = Parent.Height - decorations.Height };
+            }
         }
 
         /// <summary>
@@ -52,7 +108,7 @@ namespace FlaxEditor.GUI.Docking
                 return;
 
             // Create docking hint window
-            DockHintWindow.Create(this);
+            WindowDragHelper.StartDragging(this);
         }
 
         /// <summary>
@@ -71,23 +127,29 @@ namespace FlaxEditor.GUI.Docking
             settings.Title = title;
             settings.Size = size;
             settings.Position = location;
-            settings.MinimumSize = new Float2(1);
+            settings.MinimumSize = new Float2(200, 150);
             settings.MaximumSize = Float2.Zero; // Unlimited size
             settings.Fullscreen = false;
             settings.HasBorder = true;
-            settings.SupportsTransparency = false;
+            settings.SupportsTransparency = true;
             settings.ActivateWhenFirstShown = true;
             settings.AllowInput = true;
             settings.AllowMinimize = true;
             settings.AllowMaximize = true;
             settings.AllowDragAndDrop = true;
             settings.IsTopmost = false;
-            settings.IsRegularWindow = true;
+            settings.Type = WindowType.Regular;
             settings.HasSizingFrame = true;
             settings.ShowAfterFirstPaint = false;
             settings.ShowInTaskbar = true;
             settings.StartPosition = startPosition;
             
+            if (Utilities.Utils.UseCustomWindowDecorations())
+            {
+                settings.HasBorder = false;
+                //settings.HasSizingFrame = false;
+            }
+
             // Create window
             return Platform.CreateWindow(ref settings);
         }

Source/Editor/GUI/Docking/MasterDockPanel.cs

@@ -81,7 +81,6 @@ namespace FlaxEditor.GUI.Docking
         public DockPanel HitTest(ref Float2 position, FloatWindowDockPanel excluded)
         {
             // Check all floating windows
-            // TODO: gather windows order and take it into account when performing test
             for (int i = 0; i < FloatingPanels.Count; i++)
             {
                 var win = FloatingPanels[i];
@@ -94,9 +93,44 @@ namespace FlaxEditor.GUI.Docking
             }
 
             // Base
+            //if (!Root?.RootWindow.Window.IsFocused ?? false)
+            //    return null;
             return base.HitTest(ref position);
         }
 
+        /// <summary>
+        /// Performs hit test over dock panel.
+        /// </summary>
+        /// <param name="position">Window space position to test.</param>
+        /// <param name="excluded">Floating window to omit during searching (and all docked to that one).</param>
+        /// <param name="hitResults">Results of the hit test</param>
+        /// <returns>True if any dock panels were hit, otherwise false.</returns>
+        public bool HitTest(ref Float2 position, FloatWindowDockPanel excluded, out DockPanel[] hitResults)
+        {
+            // Check all floating windows
+            List<DockPanel> results = new(FloatingPanels.Count);
+            for (int i = 0; i < FloatingPanels.Count; i++)
+            {
+                var win = FloatingPanels[i];
+                if (win.Visible && win != excluded)
+                {
+                    var result = win.HitTest(ref position);
+                    if (result != null)
+                        results.Add(result);
+                }
+            }
+
+            // Base
+            //if (!Root?.RootWindow.Window.IsFocused ?? false)
+            //    return null;
+            var baseResult = base.HitTest(ref position);
+            if (baseResult != null)
+                results.Add(baseResult);
+
+            hitResults = results.ToArray();
+            return hitResults.Length > 0;
+        }
+
         internal void LinkWindow(DockWindow window)
         {
             // Add to the windows list

Source/Editor/GUI/Docking/WindowDragHelper.cs

@@ -0,0 +1,458 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.GUI.Docking
+{
+    /// <summary>
+    /// Helper class used to handle docking windows dragging and docking.
+    /// </summary>
+    public class WindowDragHelper
+    {
+        private FloatWindowDockPanel _toMove;
+
+        private Float2 _dragOffset;
+        private Rectangle _rectDock;
+        private Float2 _mouse;
+        private DockState _toSet;
+        private DockPanel _toDock;
+        private Window _dragSourceWindow;
+
+        private Rectangle _rLeft, _rRight, _rBottom, _rUpper, _rCenter;
+        private Control _dockHintDown, _dockHintUp, _dockHintLeft, _dockHintRight, _dockHintCenter;
+
+        /// <summary>
+        /// The hint control size.
+        /// </summary>
+        public const float HintControlSize = 32.0f;
+
+        /// <summary>
+        /// 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;
+
+            // Bind events
+            FlaxEngine.Scripting.Update += OnUpdate;
+            window.MouseUp += OnMouseUp;
+            
+            // Update rectangles
+            UpdateRects(Platform.MousePosition);
+            
+            // Ensure the dragged window stays on top of every other window
+            window.IsAlwaysOnTop = true;
+
+            _dragSourceWindow = dragSourceWindow;
+            if (_dragSourceWindow != null) // Detaching a tab from existing window
+            {
+                _dragOffset = new Float2(window.Size.X / 2, 10.0f);
+                
+                _dragSourceWindow.MouseUp += OnMouseUp; // The mouse up event is sent to the source window on Windows
+
+                // TODO: when detaching tab in floating window (not main window), the drag source window is still main window?
+                var dragSourceWindowWayland = toMove.MasterPanel?.RootWindow.Window ?? Editor.Instance.Windows.MainWindow;
+                window.DoDragDrop(window.Title, _dragOffset, dragSourceWindowWayland);
+            }
+            else
+            {
+                _dragOffset = window.MousePosition;
+                window.DoDragDrop(window.Title, _dragOffset, window);
+            }
+        }
+
+        /// <summary>
+        /// Releases unmanaged and - optionally - managed resources.
+        /// </summary>
+        public void Dispose()
+        {
+            IsDragActive = false;
+            var window = _toMove?.Window?.Window;
+
+            // Unbind events
+            FlaxEngine.Scripting.Update -= OnUpdate;
+            if (window != null)
+                window.MouseUp -= OnMouseUp;
+            if (_dragSourceWindow != null)
+                _dragSourceWindow.MouseUp -= OnMouseUp;
+
+            RemoveDockHints();
+
+            if (_toMove == null)
+                return;
+
+            if (window != null)
+            {
+                window.Opacity = 1.0f;
+                window.IsAlwaysOnTop = false;
+                window.BringToFront();
+            }
+
+            // Check if window won't be docked
+            if (_toSet == DockState.Float)
+            {
+                if (window == null)
+                    return;
+
+                // Show base window
+                window.Show();
+            }
+            else
+            {
+                bool hasNoChildPanels = _toMove.ChildPanelsCount == 0;
+
+                // Check if window has only single tab
+                if (hasNoChildPanels && _toMove.TabsCount == 1)
+                {
+                    // Dock window
+                    _toMove.GetTab(0).Show(_toSet, _toDock);
+                }
+                // Check if dock as tab and has no child panels
+                else if (hasNoChildPanels && _toSet == DockState.DockFill)
+                {
+                    // Dock all tabs
+                    while (_toMove.TabsCount > 0)
+                    {
+                        _toMove.GetTab(0).Show(DockState.DockFill, _toDock);
+                    }
+                }
+                else
+                {
+                    var selectedTab = _toMove.SelectedTab;
+
+                    // Dock the first tab into the target location
+                    if (_toMove.TabsCount > 0)
+                    {
+                        var firstTab = _toMove.GetTab(0);
+                        firstTab.Show(_toSet, _toDock);
+
+                        // Dock rest of the tabs
+                        while (_toMove.TabsCount > 0)
+                        {
+                            _toMove.GetTab(0).Show(DockState.DockFill, firstTab);
+                        }
+                    }
+
+                    // Keep selected tab being selected
+                    selectedTab?.SelectTab();
+                }
+
+                // Focus target window
+                _toDock.Root.Focus();
+            }
+
+            _toMove = null;
+        }
+
+        /// <summary>
+        /// Start dragging a floating dock panel.
+        /// </summary>
+        /// <param name="toMove">Floating dock panel to move.</param>
+        /// <returns>The window drag helper object.</returns>
+        public static WindowDragHelper StartDragging(FloatWindowDockPanel toMove)
+        {
+            if (toMove == null)
+                throw new ArgumentNullException();
+
+            return new WindowDragHelper(toMove, null);
+        }
+
+        /// <summary>
+        /// Start dragging a docked panel into a floating window.
+        /// </summary>
+        /// <param name="toMove">Dock window to move.</param>
+        /// <param name="dragSourceWindow">The window where dragging started from.</param>
+        /// <returns>The window drag helper object.</returns>
+        public static WindowDragHelper StartDragging(DockWindow toMove, Window dragSourceWindow)
+        {
+            if (toMove == null)
+                throw new ArgumentNullException();
+
+            // Create floating window
+            toMove.CreateFloating();
+
+            // Get floating panel
+            var window = (WindowRootControl)toMove.Root;
+            var floatingPanelToMove = window.GetChild(0) as FloatWindowDockPanel;
+
+            return new WindowDragHelper(floatingPanelToMove, dragSourceWindow);
+        }
+
+        private sealed class DragVisuals : Control
+        {
+            public DragVisuals()
+            {
+                AnchorPreset = AnchorPresets.StretchAll;
+                Offsets = Margin.Zero;
+            }
+
+            public override void Draw()
+            {
+                base.Draw();
+                Render2D.DrawRectangle(new Rectangle(Float2.Zero, Size), Style.Current.SelectionBorder);
+            }
+        }
+
+        private void AddDockHints()
+        {
+            if (_toDock == null)
+                return;
+
+            if (_toDock.RootWindow.Window != _dragSourceWindow)
+                _toDock.RootWindow.Window.MouseUp += OnMouseUp;
+
+            _dockHintDown = AddHintControl(new Float2(0.5f, 1));
+            _dockHintUp = AddHintControl(new Float2(0.5f, 0));
+            _dockHintLeft = AddHintControl(new Float2(0, 0.5f));
+            _dockHintRight = AddHintControl(new Float2(1, 0.5f));
+            _dockHintCenter = AddHintControl(new Float2(0.5f, 0.5f));
+
+            Control AddHintControl(Float2 pivot)
+            {
+                DragVisuals hintControl = _toDock.AddChild<DragVisuals>();
+                hintControl.Size = new Float2(HintControlSize);
+                hintControl.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                hintControl.Pivot = pivot;
+                hintControl.PivotRelative = true;
+                return hintControl;
+            }
+        }
+        
+        private void RemoveDockHints()
+        {
+            if (_toDock == null)
+                return;
+
+            if (_toDock.RootWindow.Window != _dragSourceWindow)
+                _toDock.RootWindow.Window.MouseUp -= OnMouseUp;
+
+            _dockHintDown?.Parent.RemoveChild(_dockHintDown);
+            _dockHintUp?.Parent.RemoveChild(_dockHintUp);
+            _dockHintLeft?.Parent.RemoveChild(_dockHintLeft);
+            _dockHintRight?.Parent.RemoveChild(_dockHintRight);
+            _dockHintCenter?.Parent.RemoveChild(_dockHintCenter);
+            _dockHintDown = _dockHintUp = _dockHintLeft = _dockHintRight = _dockHintCenter = null;
+        }
+
+        private void UpdateRects(Float2 mousePos)
+        {
+            // Cache mouse position
+            _mouse = mousePos;
+
+            // Check intersection with any dock panel
+            DockPanel dockPanel = null;
+            if (_toMove.MasterPanel.HitTest(ref _mouse, _toMove, out var hitResults))
+            {
+                dockPanel = hitResults[0];
+
+                // Prefer panel which currently has focus
+                foreach (var hit in hitResults)
+                {
+                    if (hit.RootWindow.Window.IsFocused)
+                    {
+                        dockPanel = hit;
+                        break;
+                    }
+                }
+
+                // Prefer panel in the same window we hit earlier
+                if (dockPanel?.RootWindow != _toDock?.RootWindow)
+                {
+                    foreach (var hit in hitResults)
+                    {
+                        if (hit.RootWindow == _toDock?.RootWindow)
+                        {
+                            dockPanel = _toDock;
+                            break;
+                        }
+                    }
+                }
+            }
+            
+            if (dockPanel != _toDock)
+            {
+                RemoveDockHints();
+                _toDock = dockPanel;
+                AddDockHints();
+
+                // Make sure the all the dock hint areas are not under other windows
+                _toDock?.RootWindow.Window.BringToFront();
+                //_toDock?.RootWindow.Window.Focus();
+
+                // Make the dragged window transparent when dock hints are visible
+                _toMove.Window.Window.Opacity = _toDock == null ? 1.0f : DragWindowOpacity;
+            }
+            
+            // Check dock state to use
+            bool showProxyHints = _toDock != null;
+            bool showBorderHints = showProxyHints;
+            bool showCenterHint = showProxyHints;
+            Control hoveredHintControl = null;
+            Float2 hoveredSizeOverride = Float2.Zero;
+            if (showProxyHints)
+            {
+                // If moved window has not only tabs but also child panels disable docking as tab
+                if (_toMove.ChildPanelsCount > 0)
+                    showCenterHint = false;
+
+                // Disable docking windows with one or more dock panels inside
+                if (_toMove.ChildPanelsCount > 0)
+                    showBorderHints = false;
+
+                // Get dock area
+                _rectDock = _toDock.DockAreaBounds;
+
+                // Cache dock rectangles
+                var size = _rectDock.Size / Platform.DpiScale;
+                var offset = _toDock.PointFromScreen(_rectDock.Location);
+                var borderMargin = 4.0f;
+                var hintWindowsSize = HintControlSize;
+                var hintWindowsSize2 = hintWindowsSize * 0.5f;
+                var hintPreviewSize = new Float2(Math.Max(HintControlSize * 2, size.X * 0.5f), Math.Max(HintControlSize * 2, size.Y * 0.5f));
+                var centerX = size.X * 0.5f;
+                var centerY = size.Y * 0.5f;
+                _rUpper = new Rectangle(centerX - hintWindowsSize2, borderMargin, hintWindowsSize, hintWindowsSize) + offset;
+                _rBottom = new Rectangle(centerX - hintWindowsSize2, size.Y - hintWindowsSize - borderMargin, hintWindowsSize, hintWindowsSize) + offset;
+                _rLeft = new Rectangle(borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+                _rRight = new Rectangle(size.X - hintWindowsSize - borderMargin, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+                _rCenter = new Rectangle(centerX - hintWindowsSize2, centerY - hintWindowsSize2, hintWindowsSize, hintWindowsSize) + offset;
+
+                // Hit test, and calculate the approximation for filled area when hovered over the hint
+                DockState toSet = DockState.Float;
+                if (showBorderHints)
+                {
+                    if (_rUpper.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockTop;
+                        hoveredHintControl = _dockHintUp;
+                        hoveredSizeOverride = new Float2(size.X, hintPreviewSize.Y);
+                    }
+                    else if (_rBottom.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockBottom;
+                        hoveredHintControl = _dockHintDown;
+                        hoveredSizeOverride = new Float2(size.X, hintPreviewSize.Y);
+                    }
+                    else if (_rLeft.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockLeft;
+                        hoveredHintControl = _dockHintLeft;
+                        hoveredSizeOverride = new Float2(hintPreviewSize.X, size.Y);
+                    }
+                    else if (_rRight.Contains(_toDock.PointFromScreen(_mouse)))
+                    {
+                        toSet = DockState.DockRight;
+                        hoveredHintControl = _dockHintRight;
+                        hoveredSizeOverride = new Float2(hintPreviewSize.X, size.Y);
+                    }
+                }
+                if (showCenterHint && _rCenter.Contains(_toDock.PointFromScreen(_mouse)))
+                {
+                    toSet = DockState.DockFill;
+                    hoveredHintControl = _dockHintCenter;
+                    hoveredSizeOverride = new Float2(size.X, size.Y);
+                }
+
+                _toSet = toSet;
+            }
+            else
+            {
+                _toSet = DockState.Float;
+            }
+            
+            // Update sizes and opacity of hint controls
+            if (_toDock != null)
+            {
+                if (hoveredHintControl != _dockHintDown)
+                {
+                    _dockHintDown.Size = new Float2(HintControlSize);
+                    _dockHintDown.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintLeft)
+                {
+                    _dockHintLeft.Size = new Float2(HintControlSize);
+                    _dockHintLeft.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintRight)
+                {
+                    _dockHintRight.Size = new Float2(HintControlSize);
+                    _dockHintRight.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintUp)
+                {
+                    _dockHintUp.Size = new Float2(HintControlSize);
+                    _dockHintUp.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+                if (hoveredHintControl != _dockHintCenter)
+                {
+                    _dockHintCenter.Size = new Float2(HintControlSize);
+                    _dockHintCenter.BackgroundColor = Style.Current.Selection.AlphaMultiplied(0.6f);
+                }
+
+                if (_toSet != DockState.Float)
+                {
+                    if (hoveredHintControl != null)
+                    {
+                        hoveredHintControl.BackgroundColor = Style.Current.Selection.AlphaMultiplied(1.0f);
+                        hoveredHintControl.Size = hoveredSizeOverride;
+                    }
+                }
+            }
+
+            // Update hint controls visibility and location
+            if (showProxyHints)
+            {
+                if (hoveredHintControl != _dockHintDown)
+                    _dockHintDown.Location = _rBottom.Location;
+                if (hoveredHintControl != _dockHintLeft)
+                    _dockHintLeft.Location = _rLeft.Location;
+                if (hoveredHintControl != _dockHintRight)
+                    _dockHintRight.Location = _rRight.Location;
+                if (hoveredHintControl != _dockHintUp)
+                    _dockHintUp.Location = _rUpper.Location;
+                if (hoveredHintControl != _dockHintCenter)
+                    _dockHintCenter.Location = _rCenter.Location;
+                
+                _dockHintDown.Visible = showProxyHints & showBorderHints;
+                _dockHintLeft.Visible = showProxyHints & showBorderHints;
+                _dockHintRight.Visible = showProxyHints & showBorderHints;
+                _dockHintUp.Visible = showProxyHints & showBorderHints;
+                _dockHintCenter.Visible = showProxyHints & showCenterHint;
+            }
+        }
+
+        private void OnMouseUp(ref Float2 location, MouseButton button, ref bool handled)
+        {
+            if (button == MouseButton.Left)
+                Dispose();
+        }
+
+        private void OnUpdate()
+        {
+            var mousePos = Platform.MousePosition;
+
+            if (_mouse != mousePos)
+                OnMouseMove(mousePos);
+        }
+        
+        private void OnMouseMove(Float2 mousePos)
+        {
+            if (_dragSourceWindow != null)
+                _toMove.Window.Window.Position = mousePos - _dragOffset;
+
+            UpdateRects(mousePos);
+        }
+    }
+}

Source/Editor/GUI/Input/DoubleValueBox.cs

@@ -41,7 +41,7 @@ namespace FlaxEditor.GUI.Input
             get => _min;
             set
             {
-                if (!Mathd.NearEqual(_min, value))
+                if (_min != value)
                 {
                     if (value > _max)
                         throw new ArgumentException();
@@ -58,7 +58,7 @@ namespace FlaxEditor.GUI.Input
             get => _max;
             set
             {
-                if (!Mathd.NearEqual(_max, value))
+                if (_max != value)
                 {
                     if (value < _min)
                         throw new ArgumentException();

Source/Editor/GUI/Input/FloatValueBox.cs

@@ -38,7 +38,7 @@ namespace FlaxEditor.GUI.Input
             get => _min;
             set
             {
-                if (!Mathf.NearEqual(_min, value))
+                if (_min != value)
                 {
                     if (value > _max)
                         throw new ArgumentException();
@@ -54,7 +54,7 @@ namespace FlaxEditor.GUI.Input
             get => _max;
             set
             {
-                if (!Mathf.NearEqual(_max, value))
+                if (_max != value)
                 {
                     if (value < _min)
                         throw new ArgumentException();

Source/Editor/GUI/Input/SliderControl.cs

@@ -54,7 +54,7 @@ namespace FlaxEditor.GUI.Input
                 set
                 {
                     value = Mathf.Clamp(value, Minimum, Maximum);
-                    if (!Mathf.NearEqual(value, _value))
+                    if (value != _value)
                     {
                         _value = value;
 
@@ -311,7 +311,7 @@ namespace FlaxEditor.GUI.Input
             get => _min;
             set
             {
-                if (!Mathf.NearEqual(_min, value))
+                if (_min != value)
                 {
                     if (value > _max)
                         throw new ArgumentException();
@@ -330,7 +330,7 @@ namespace FlaxEditor.GUI.Input
             get => _max;
             set
             {
-                if (!Mathf.NearEqual(_max, value))
+                if (_max != value)
                 {
                     if (value < _min)
                         throw new ArgumentException();

Source/Editor/GUI/Input/ValueBox.cs

@@ -266,6 +266,7 @@ namespace FlaxEditor.GUI.Input
             return base.OnMouseDown(location, button);
         }
 
+#if !PLATFORM_SDL
         /// <inheritdoc />
         public override void OnMouseMove(Float2 location)
         {
@@ -292,13 +293,45 @@ namespace FlaxEditor.GUI.Input
             base.OnMouseMove(location);
         }
 
+#else
+
+        /// <inheritdoc />
+        public override void OnMouseMoveRelative(Float2 mouseMotion)
+        {
+            var location = Root.TrackingMouseOffset;
+            if (_isSliding)
+            {
+                // Update sliding
+                ApplySliding(Root.TrackingMouseOffset.X * _slideSpeed);
+                return;
+            }
+
+            // Update cursor type so user knows they can slide value
+            if (CanUseSliding && SlideRect.Contains(location) && !_isSliding)
+            {
+                Cursor = CursorType.SizeWE;
+                _cursorChanged = true;
+            }
+            else if (_cursorChanged && !_isSliding)
+            {
+                Cursor = CursorType.Default;
+                _cursorChanged = false;
+            }
+
+            base.OnMouseMoveRelative(mouseMotion);
+        }
+
+#endif
+
         /// <inheritdoc />
         public override bool OnMouseUp(Float2 location, MouseButton button)
         {
             if (button == MouseButton.Left && _isSliding)
             {
+#if !PLATFORM_SDL
                 // End sliding and return mouse to original location
                 RootWindow.MousePosition = _mouseClickedPosition;
+#endif
                 EndSliding();
                 return true;
             }

Source/Editor/GUI/ItemsListContextMenu.cs

@@ -227,9 +227,8 @@ namespace FlaxEditor.GUI
                 {
                     int order = -1 * SortScore.CompareTo(otherItem.SortScore);
                     if (order == 0)
-                    {
                         order = string.Compare(Name, otherItem.Name, StringComparison.Ordinal);
-                    }
+
                     return order;
                 }
                 return base.Compare(other);
@@ -509,7 +508,7 @@ namespace FlaxEditor.GUI
                 OnSearchFilterChanged();
         }
 
-        private List<Item> GetVisibleItems()
+        private List<Item> GetVisibleItems(bool ignoreFoldedCategories)
         {
             var result = new List<Item>();
             var items = ItemsPanel.Children;
@@ -523,7 +522,7 @@ namespace FlaxEditor.GUI
                 for (int i = 0; i < _categoryPanels.Count; i++)
                 {
                     var category = _categoryPanels[i];
-                    if (!category.Visible)
+                    if (!category.Visible || (ignoreFoldedCategories && category is DropPanel panel && panel.IsClosed))
                         continue;
                     for (int j = 0; j < category.Children.Count; j++)
                     {
@@ -535,6 +534,12 @@ namespace FlaxEditor.GUI
             return result;
         }
 
+        private void ExpandToItem(Item item)
+        {
+            if (item.Parent is DropPanel dropPanel)
+                dropPanel.Open(false);
+        }
+
         /// <inheritdoc />
         protected override void OnShow()
         {
@@ -563,8 +568,17 @@ namespace FlaxEditor.GUI
             case KeyboardKeys.Escape:
                 Hide();
                 return true;
+            case KeyboardKeys.Backspace:
+                // Allow the user to quickly focus the searchbar
+                if (_searchBox != null && !_searchBox.IsFocused)
+                {
+                    _searchBox.Focus();
+                    _searchBox.SelectAll();
+                    return true;
+                }
+                break;
             case KeyboardKeys.ArrowDown:
-            {
+            case KeyboardKeys.ArrowUp:
                 if (RootWindow.FocusedControl == null)
                 {
                     // Focus search box if nothing is focused
@@ -572,45 +586,44 @@ namespace FlaxEditor.GUI
                     return true;
                 }
 
-                //  Focus the first visible item or then next one
+                // Get the next item
-                var items = GetVisibleItems();
+                bool controlDown = Root.GetKey(KeyboardKeys.Control);
+                var items = GetVisibleItems(!controlDown);
                 var focusedIndex = items.IndexOf(focusedItem);
-                if (focusedIndex == -1)
+
-                    focusedIndex = -1;
+                // If the user hasn't selected anything yet and is holding control, focus first folded item
-                if (focusedIndex + 1 < items.Count)
+                if (focusedIndex == -1 && controlDown)
-                {
+                    focusedIndex = GetVisibleItems(true).Count - 1;
-                    var item = items[focusedIndex + 1];
+
-                    item.Focus();
+                int delta = key == KeyboardKeys.ArrowDown ? -1 : 1;
-                    _scrollPanel.ScrollViewTo(item);
+                int nextIndex = Mathf.Wrap(focusedIndex - delta, 0, items.Count - 1);
-                    return true;
+                var nextItem = items[nextIndex];
-                }
+
-                break;
+                // Focus the next item
-            }
+                nextItem.Focus();
-            case KeyboardKeys.ArrowUp:
+            
-                if (focusedItem != null)
+                // Allow the user to expand groups while scrolling
-                {
+                if (controlDown)
-                    //  Focus the previous visible item or the search box
+                    ExpandToItem(nextItem);
-                    var items = GetVisibleItems();
+                
-                    var focusedIndex = items.IndexOf(focusedItem);
+                _scrollPanel.ScrollViewTo(nextItem);
-                    if (focusedIndex == 0)
+                return true;
-                    {
-                        _searchBox?.Focus();
-                    }
-                    else if (focusedIndex > 0)
-                    {
-                        var item = items[focusedIndex - 1];
-                        item.Focus();
-                        _scrollPanel.ScrollViewTo(item);
-                        return true;
-                    }
-                }
-                break;
             case KeyboardKeys.Return:
                 if (focusedItem != null)
                 {
                     OnClickItem(focusedItem);
                     return true;
                 }
+                else
+                {
+                    // Select first item if no item is focused (most likely to be the best result), saves the user from pressing arrow down first
+                    var visibleItems = GetVisibleItems(true);
+                    if (visibleItems.Count > 0)
+                    {
+                        OnClickItem(visibleItems[0]);
+                        return true;
+                    }
+                }
                 break;
             }
 

Source/Editor/GUI/MainMenu.cs

@@ -12,16 +12,6 @@ namespace FlaxEditor.GUI
     /// <seealso cref="FlaxEngine.GUI.ContainerControl" />
     public sealed class MainMenu : ContainerControl
     {
-#if PLATFORM_WINDOWS
-        private bool _useCustomWindowSystem;
-        private Image _icon;
-        private Label _title;
-        private Button _closeButton;
-        private Button _minimizeButton;
-        private Button _maximizeButton;
-        private LocalizedString _charChromeRestore, _charChromeMaximize;
-        private Window _window;
-#endif
         private MainMenuButton _selected;
 
         /// <summary>
@@ -60,200 +50,12 @@ namespace FlaxEditor.GUI
         /// <summary>
         /// Initializes a new instance of the <see cref="MainMenu"/> class.
         /// </summary>
-        /// <param name="mainWindow">The main window.</param>
+        public MainMenu()
-        public MainMenu(RootControl mainWindow)
         : base(0, 0, 0, 20)
         {
             AutoFocus = false;
             AnchorPreset = AnchorPresets.HorizontalStretchTop;
-
+            BackgroundColor = Style.Current.LightBackground;
-#if PLATFORM_WINDOWS
-            _useCustomWindowSystem = !Editor.Instance.Options.Options.Interface.UseNativeWindowSystem;
-            if (_useCustomWindowSystem)
-            {
-                BackgroundColor = Style.Current.LightBackground;
-                Height = 28;
-
-                var windowIcon = FlaxEngine.Content.LoadAsyncInternal<Texture>(EditorAssets.WindowIcon);
-                FontAsset windowIconsFont = FlaxEngine.Content.LoadAsyncInternal<FontAsset>(EditorAssets.WindowIconsFont);
-                Font iconFont = windowIconsFont?.CreateFont(9);
-
-                _window = mainWindow.RootWindow.Window;
-                _window.HitTest += OnHitTest;
-                _window.Closed += OnWindowClosed;
-
-                ScriptsBuilder.GetBinariesConfiguration(out _, out _, out _, out var configuration);
-
-                _icon = new Image
-                {
-                    Margin = new Margin(6, 6, 6, 6),
-                    Brush = new TextureBrush(windowIcon),
-                    Color = Style.Current.Foreground,
-                    KeepAspectRatio = false,
-                    TooltipText = string.Format("{0}\nVersion {1}\nConfiguration {3}\nGraphics {2}", _window.Title, Globals.EngineVersion, GPUDevice.Instance.RendererType, configuration),
-                    Parent = this,
-                };
-
-                _title = new Label(0, 0, Width, Height)
-                {
-                    Text = _window.Title,
-                    HorizontalAlignment = TextAlignment.Center,
-                    VerticalAlignment = TextAlignment.Center,
-                    ClipText = true,
-                    TextColor = Style.Current.ForegroundGrey,
-                    TextColorHighlighted = Style.Current.ForegroundGrey,
-                    Parent = this,
-                };
-
-                _closeButton = new Button
-                {
-                    Text = ((char)EditorAssets.SegMDL2Icons.ChromeClose).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Color.Red,
-                    BackgroundColorSelected = Color.Red.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _closeButton.Clicked += () => _window.Close(ClosingReason.User);
-
-                _minimizeButton = new Button
-                {
-                    Text = ((char)EditorAssets.SegMDL2Icons.ChromeMinimize).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _minimizeButton.Clicked += () => _window.Minimize();
-
-                _maximizeButton = new Button
-                {
-                    Text = ((char)(_window.IsMaximized ? EditorAssets.SegMDL2Icons.ChromeRestore : EditorAssets.SegMDL2Icons.ChromeMaximize)).ToString(),
-                    Font = new FontReference(iconFont),
-                    BackgroundColor = Color.Transparent,
-                    BorderColor = Color.Transparent,
-                    BorderColorHighlighted = Color.Transparent,
-                    BorderColorSelected = Color.Transparent,
-                    TextColor = Style.Current.Foreground,
-                    Width = 46,
-                    BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
-                    Parent = this,
-                };
-                _maximizeButton.Clicked += () =>
-                {
-                    if (_window.IsMaximized)
-                        _window.Restore();
-                    else
-                        _window.Maximize();
-                };
-                _charChromeRestore = ((char)EditorAssets.SegMDL2Icons.ChromeRestore).ToString();
-                _charChromeMaximize = ((char)EditorAssets.SegMDL2Icons.ChromeMaximize).ToString();
-            }
-            else
-#endif
-            {
-                BackgroundColor = Style.Current.LightBackground;
-            }
-        }
-
-#if PLATFORM_WINDOWS
-        /// <inheritdoc />
-        public override void Update(float deltaTime)
-        {
-            base.Update(deltaTime);
-
-            if (_maximizeButton != null)
-            {
-                _maximizeButton.Text = _window.IsMaximized ? _charChromeRestore : _charChromeMaximize;
-            }
-        }
-
-        private void OnWindowClosed()
-        {
-            if (_window != null)
-            {
-                _window.HitTest = null;
-                _window = null;
-            }
-        }
-
-        private WindowHitCodes OnHitTest(ref Float2 mouse)
-        {
-            var dpiScale = _window.DpiScale;
-
-            if (_window.IsMinimized)
-                return WindowHitCodes.NoWhere;
-
-            if (!_window.IsMaximized)
-            {
-                var pos = _window.ScreenToClient(mouse * dpiScale); // pos is not DPI adjusted
-                var winSize = _window.Size;
-
-                // Distance from which the mouse is considered to be on the border/corner
-                float distance = 5.0f * dpiScale;
-
-                if (pos.Y > winSize.Y - distance && pos.X < distance)
-                    return WindowHitCodes.BottomLeft;
-
-                if (pos.X > winSize.X - distance && pos.Y > winSize.Y - distance)
-                    return WindowHitCodes.BottomRight;
-
-                if (pos.Y < distance && pos.X < distance)
-                    return WindowHitCodes.TopLeft;
-
-                if (pos.Y < distance && pos.X > winSize.X - distance)
-                    return WindowHitCodes.TopRight;
-
-                if (pos.X > winSize.X - distance)
-                    return WindowHitCodes.Right;
-
-                if (pos.X < distance)
-                    return WindowHitCodes.Left;
-
-                if (pos.Y < distance)
-                    return WindowHitCodes.Top;
-
-                if (pos.Y > winSize.Y - distance)
-                    return WindowHitCodes.Bottom;
-            }
-
-            var mousePos = PointFromScreen(mouse * dpiScale);
-            var controlUnderMouse = GetChildAt(mousePos);
-            var isMouseOverSth = controlUnderMouse != null && controlUnderMouse != _title;
-            var rb = GetRightButton();
-            if (rb != null && _minimizeButton != null && new Rectangle(rb.UpperRight, _minimizeButton.BottomLeft - rb.UpperRight).Contains(ref mousePos) && !isMouseOverSth)
-                return WindowHitCodes.Caption;
-
-            return WindowHitCodes.Client;
-        }
-#endif
-
-        /// <summary>
-        /// Return the rightmost button.
-        /// </summary>
-        /// <returns>Rightmost button, null if there is no <see cref="MainMenuButton"/></returns>
-        private MainMenuButton GetRightButton()
-        {
-            MainMenuButton b = null;
-            foreach (var control in Children)
-            {
-                if (b == null && control is MainMenuButton)
-                    b = (MainMenuButton)control;
-
-                if (control is MainMenuButton && control.Right > b.Right)
-                    b = (MainMenuButton)control;
-            }
-            return b;
         }
 
         /// <summary>
@@ -266,6 +68,19 @@ namespace FlaxEditor.GUI
             return AddChild(new MainMenuButton(text));
         }
 
+        /// <summary>
+        /// Gets or adds a button.
+        /// </summary>
+        /// <param name="text">The button text</param>
+        /// <returns>The existing or created button control.</returns>
+        public MainMenuButton GetOrAddButton(string text)
+        {
+            MainMenuButton result = GetButton(text);
+            if (result == null)
+                result = AddButton(text);
+            return result;
+        }
+
         /// <summary>
         /// Gets the button.
         /// </summary>
@@ -285,26 +100,6 @@ namespace FlaxEditor.GUI
             return result;
         }
 
-        /// <inheritdoc />
-        public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
-        {
-            if (base.OnMouseDoubleClick(location, button))
-                return true;
-
-#if PLATFORM_WINDOWS
-            var child = GetChildAtRecursive(location);
-            if (_useCustomWindowSystem && child is not Button && child is not MainMenuButton)
-            {
-                if (_window.IsMaximized)
-                    _window.Restore();
-                else
-                    _window.Maximize();
-            }
-#endif
-
-            return true;
-        }
-
         /// <inheritdoc />
         public override bool OnKeyDown(KeyboardKeys key)
         {
@@ -320,16 +115,8 @@ namespace FlaxEditor.GUI
         protected override void PerformLayoutAfterChildren()
         {
             float x = 0;
-
+            WindowDecorations decorations = Parent.GetChild<WindowDecorations>();
-#if PLATFORM_WINDOWS
+            x += decorations?.Icon?.Width ?? 0;
-            if (_useCustomWindowSystem)
-            {
-                // Icon
-                _icon.X = x;
-                _icon.Size = new Float2(Height);
-                x += _icon.Width;
-            }
-#endif
 
             // Arrange controls
             MainMenuButton rightMostButton = null;
@@ -349,36 +136,20 @@ namespace FlaxEditor.GUI
                 }
             }
             
-#if PLATFORM_WINDOWS
+            // Fill the right side if title and buttons are not present
-            if (_useCustomWindowSystem)
+            if (decorations?.Title == null)
-            {
+                Width = Parent.Width;
-                // Buttons
+            else
-                _closeButton.Height = Height;
+                Width = x;
-                _closeButton.X = Width - _closeButton.Width;
-                _maximizeButton.Height = Height;
-                _maximizeButton.X = _closeButton.X - _maximizeButton.Width;
-                _minimizeButton.Height = Height;
-                _minimizeButton.X = _maximizeButton.X - _minimizeButton.Width;
-
-                // Title
-                _title.Bounds = new Rectangle(x + 2, 0, _minimizeButton.Left - x - 4, Height);
-                //_title.Text = _title.Width < 300.0f ? Editor.Instance.ProjectInfo.Name : _window.Title;
-            }
-#endif
         }
 
-#if PLATFORM_WINDOWS
         /// <inheritdoc />
         public override void OnDestroy()
         {
             base.OnDestroy();
             
-            if (_window != null)
+            if (_selected != null)
-            {
+                Selected = null;
-                _window.Closed -= OnWindowClosed;
-                OnWindowClosed();
-            }
         }
-#endif
     }
 }

Source/Editor/GUI/MainMenuButton.cs

@@ -42,14 +42,12 @@ namespace FlaxEditor.GUI
             Text = text;
 
             var style = Style.Current;
-#if PLATFORM_WINDOWS
+            if (!Utilities.Utils.UseCustomWindowDecorations())
-            if (Editor.Instance.Options.Options.Interface.UseNativeWindowSystem)
             {
                 BackgroundColorMouseOver = style.BackgroundHighlighted;
                 BackgroundColorMouseOverOpened = style.Background;
             }
             else
-#endif
             {
                 BackgroundColorMouseOver = BackgroundColorMouseOverOpened = style.LightBackground * 1.3f;
             }

Source/Editor/GUI/Tabs/Tabs.cs

@@ -47,6 +47,7 @@ namespace FlaxEditor.GUI.Tabs
                 if (EnabledInHierarchy && Tab.Enabled)
                 {
                     Tabs.SelectedTab = Tab;
+                    Tab.PerformLayout(true);
                     Tabs.Focus();
                 }
                 return true;

Source/Editor/GUI/ToolStripButton.cs

@@ -122,6 +122,14 @@ namespace FlaxEditor.GUI
             return this;
         }
 
+        private void OnClicked()
+        {
+            if (AutoCheck)
+                Checked = !Checked;
+            Clicked?.Invoke();
+            (Parent as ToolStrip)?.OnButtonClicked(this);
+        }
+
         /// <inheritdoc />
         public override void Draw()
         {
@@ -196,11 +204,7 @@ namespace FlaxEditor.GUI
             if (button == MouseButton.Left && _primaryMouseDown)
             {
                 _primaryMouseDown = false;
-                if (AutoCheck)
+                OnClicked();
-                    Checked = !Checked;
-                Clicked?.Invoke();
-                (Parent as ToolStrip)?.OnButtonClicked(this);
-
                 return true;
             }
             if (button == MouseButton.Right && _secondaryMouseDown)
@@ -215,6 +219,18 @@ namespace FlaxEditor.GUI
             return base.OnMouseUp(location, button);
         }
 
+        /// <inheritdoc />
+        public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
+        {
+            if (button == MouseButton.Left)
+            {
+                OnClicked();
+                return true;
+            }
+
+            return false;
+        }
+
         /// <inheritdoc />
         public override void OnMouseLeave()
         {

Source/Editor/GUI/Tree/Tree.cs

@@ -40,6 +40,7 @@ namespace FlaxEditor.GUI.Tree
         private readonly bool _supportMultiSelect;
         private Margin _margin;
         private bool _autoSize = true;
+        private bool _deferLayoutUpdate = false;
 
         /// <summary>
         /// The TreeNode that is being dragged over. This could have a value when not dragging.
@@ -67,6 +68,16 @@ namespace FlaxEditor.GUI.Tree
         /// </summary>
         public TreeNode SelectedNode => Selection.Count > 0 ? Selection[0] : null;
         
+        /// <summary>
+        /// Allow nodes to Draw the root tree line.
+        /// </summary>
+        public bool DrawRootTreeLine = true;
+
+        /// <summary>
+        /// Occurs when the deferred layout operation was performed.
+        /// </summary>
+        public event Action AfterDeferredLayout;
+
         /// <summary>
         /// Gets or sets the margin for the child tree nodes.
         /// </summary>
@@ -353,9 +364,26 @@ namespace FlaxEditor.GUI.Tree
             BulkSelectUpdateExpanded(false);
         }
 
+        /// <inheritdoc />
+        public override void PerformLayout(bool force = false)
+        {
+            if (_isLayoutLocked && !force)
+                return;
+
+            // In case the tree was fully expanded or collapsed along its children, avoid calculating the layout multiple times for each child
+            _deferLayoutUpdate = true;
+        }
+
         /// <inheritdoc />
         public override void Update(float deltaTime)
         {
+            if (_deferLayoutUpdate)
+            {
+                base.PerformLayout();
+                AfterDeferredLayout?.Invoke();
+                _deferLayoutUpdate = false;
+            }
+
             var node = SelectedNode;
 
             // Check if has focus and if any node is focused and it isn't a root

Source/Editor/GUI/Tree/TreeNode.cs

@@ -760,20 +760,21 @@ namespace FlaxEditor.GUI.Tree
             // Show tree guidelines
             if (Editor.Instance.Options.Options.Interface.ShowTreeLines)
             {
-                TreeNode parentNode = Parent as TreeNode;
+                ContainerControl parent = Parent;
+                TreeNode parentNode = parent as TreeNode;
                 bool thisNodeIsLast = false;
-                while (parentNode != null && parentNode != ParentTree.Children[0])
+                while (parentNode != null && (parentNode != tree.Children[0] || tree.DrawRootTreeLine))
                 {
                     float bottomOffset = 0;
                     float topOffset = 0;
 
-                    if (Parent == parentNode && this == Parent.Children[0])
+                    if (parent == parentNode && this == parent.Children[0])
                         topOffset = 2;
 
                     if (thisNodeIsLast && parentNode.Children.Count == 1)
                         bottomOffset = topOffset != 0 ? 4 : 2;
 
-                    if (Parent == parentNode && this == Parent.Children[Parent.Children.Count - 1] && !_opened)
+                    if (parent == parentNode && this == parent.Children[^1] && !_opened)
                     {
                         thisNodeIsLast = true;
                         bottomOffset = topOffset != 0 ? 4 : 2;
@@ -784,6 +785,8 @@ namespace FlaxEditor.GUI.Tree
                     if (_iconCollaped.IsValid)
                         leftOffset += 18;
                     var lineRect1 = new Rectangle(parentNode.TextRect.Left - leftOffset, parentNode.HeaderRect.Top + topOffset, 1, parentNode.HeaderRect.Height - bottomOffset);
+                    if (HasAnyVisibleChild && CustomArrowRect.HasValue && CustomArrowRect.Value.Intersects(lineRect1))
+                        lineRect1 = Rectangle.Empty; // Skip drawing line if it's overlapping the arrow rectangle
                     Render2D.FillRectangle(lineRect1, isSelected ? style.ForegroundGrey : style.LightBackground);
                     parentNode = parentNode.Parent as TreeNode;
                 }

Source/Editor/GUI/WindowDecorations.cs

@@ -0,0 +1,342 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using System;
+using FlaxEditor.GUI.Docking;
+using FlaxEditor.Options;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.GUI;
+
+/// <summary>
+/// Represents the title bar of the window with buttons.
+/// </summary>
+/// <seealso cref="FlaxEngine.GUI.ContainerControl" />
+public class WindowDecorations : ContainerControl
+{
+    private Image _icon;
+    private Label _title;
+    private Button _closeButton;
+    private Button _minimizeButton;
+    private Button _maximizeButton;
+    private LocalizedString _charChromeRestore, _charChromeMaximize;
+    private Window _window;
+
+    /// <summary>
+    /// The title label in the title bar.
+    /// </summary>
+    public Label Title => _title;
+    
+    /// <summary>
+    /// The icon used in the title bar.
+    /// </summary>
+    public Image Icon => _icon;
+    
+    /// <summary>
+    /// The tooltip shown when hovering over the icon.
+    /// </summary>
+    public string IconTooltipText
+    {
+        get => _icon?.TooltipText ?? null;
+        set
+        {
+            if (_icon != null)
+                _icon.TooltipText = value;
+        }
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="WindowDecorations"/> class.
+    /// </summary>
+    /// <param name="window">The window.</param>
+    /// <param name="iconOnly">When set, omit drawing title and buttons.</param>
+    public WindowDecorations(RootControl window, bool iconOnly = false)
+    : base(0, 0, 0, 20)
+    {
+        _window = window.RootWindow.Window;
+        
+        AutoFocus = false;
+        AnchorPreset = AnchorPresets.HorizontalStretchTop;
+        BackgroundColor = Color.Transparent;
+
+        var windowIcon = FlaxEngine.Content.LoadAsyncInternal<Texture>(EditorAssets.WindowIcon);
+
+        _icon = new Image
+        {
+            Margin = new Margin(4, 4, 4, 4),
+            Brush = new TextureBrush(windowIcon),
+            Color = Style.Current.Foreground,
+            BackgroundColor = Style.Current.LightBackground,
+            KeepAspectRatio = false,
+            Parent = this,
+        };
+
+        if (!iconOnly)
+        {
+            _icon.Margin = new Margin(6, 6, 6, 6);
+            Height = 28;
+            
+            _window.HitTest += OnHitTest;
+            _window.Closed += OnWindowClosed;
+            
+            FontAsset windowIconsFont = FlaxEngine.Content.LoadAsyncInternal<FontAsset>(EditorAssets.WindowIconsFont);
+            Font iconFont = windowIconsFont?.CreateFont(9);
+            
+            _title = new Label(0, 0, Width, Height)
+            {
+                Text = _window.Title,
+                HorizontalAlignment = TextAlignment.Center,
+                VerticalAlignment = TextAlignment.Center,
+                ClipText = true,
+                TextColor = Style.Current.ForegroundGrey,
+                TextColorHighlighted = Style.Current.ForegroundGrey,
+                BackgroundColor = Style.Current.LightBackground,
+                Parent = this,
+            };
+
+            _closeButton = new Button
+            {
+                Text = ((char)EditorAssets.SegMDL2Icons.ChromeClose).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Color.Red,
+                BackgroundColorSelected = Color.Red.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _closeButton.Clicked += () => _window.Close(ClosingReason.User);
+
+            _minimizeButton = new Button
+            {
+                Text = ((char)EditorAssets.SegMDL2Icons.ChromeMinimize).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _minimizeButton.Clicked += () => _window.Minimize();
+
+            _maximizeButton = new Button
+            {
+                Text = ((char)(_window.IsMaximized ? EditorAssets.SegMDL2Icons.ChromeRestore : EditorAssets.SegMDL2Icons.ChromeMaximize)).ToString(),
+                Font = new FontReference(iconFont),
+                BackgroundColor = Style.Current.LightBackground,
+                BorderColor = Color.Transparent,
+                BorderColorHighlighted = Color.Transparent,
+                BorderColorSelected = Color.Transparent,
+                TextColor = Style.Current.Foreground,
+                Width = 46,
+                BackgroundColorHighlighted = Style.Current.LightBackground.RGBMultiplied(1.3f),
+                Parent = this,
+            };
+            _maximizeButton.Clicked += () =>
+            {
+                if (_window.IsMaximized)
+                    _window.Restore();
+                else
+                    _window.Maximize();
+            };
+
+            _charChromeRestore = ((char)EditorAssets.SegMDL2Icons.ChromeRestore).ToString();
+            _charChromeMaximize = ((char)EditorAssets.SegMDL2Icons.ChromeMaximize).ToString();
+        }
+    }
+    
+    /// <inheritdoc />
+    public override void Update(float deltaTime)
+    {
+        base.Update(deltaTime);
+
+        if (_maximizeButton != null)
+        {
+            var maximizeText = _window.IsMaximized ? _charChromeRestore : _charChromeMaximize;
+            if (_maximizeButton.Text != maximizeText)
+                _maximizeButton.Text = maximizeText;
+        }
+    }
+
+    private void OnWindowClosed()
+    {
+        if (_window != null)
+        {
+            _window.HitTest -= OnHitTest;
+            _window = null;
+        }
+    }
+
+    /// <summary>
+    /// Perform hit test on the window.
+    /// </summary>
+    /// <param name="mouse">The mouse position</param>
+    /// <returns>The hit code for given position.</returns>
+    protected virtual WindowHitCodes OnHitTest(ref Float2 mouse)
+    {
+        if (_window.IsMinimized)
+            return WindowHitCodes.NoWhere;
+
+        var dpiScale = _window.DpiScale;
+        var pos = _window.ScreenToClient(mouse * dpiScale); // pos is not DPI adjusted
+        if (!_window.IsMaximized)
+        {
+            var winSize = _window.Size;
+
+            // Distance from which the mouse is considered to be on the border/corner
+            float distance = 5.0f * dpiScale;
+
+            if (pos.Y > winSize.Y - distance && pos.X < distance)
+                return WindowHitCodes.BottomLeft;
+
+            if (pos.X > winSize.X - distance && pos.Y > winSize.Y - distance)
+                return WindowHitCodes.BottomRight;
+
+            if (pos.Y < distance && pos.X < distance)
+                return WindowHitCodes.TopLeft;
+
+            if (pos.Y < distance && pos.X > winSize.X - distance)
+                return WindowHitCodes.TopRight;
+
+            if (pos.X > winSize.X - distance)
+                return WindowHitCodes.Right;
+
+            if (pos.X < distance)
+                return WindowHitCodes.Left;
+
+            if (pos.Y < distance)
+                return WindowHitCodes.Top;
+
+            if (pos.Y > winSize.Y - distance)
+                return WindowHitCodes.Bottom;
+        }
+        
+        var controlUnderMouse = GetChildAt(pos, control => control != _title);
+        if (_title.Bounds.Contains(pos) && controlUnderMouse == null)
+            return WindowHitCodes.Caption;
+
+        return WindowHitCodes.Client;
+    }
+    
+    /// <inheritdoc />
+    public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
+    {
+        // These may not work with main window due to SDL not passing mouse events
+        // when interacting with hit tests on caption area...
+        
+        if (Title.Bounds.Contains(location) && button == MouseButton.Left)
+        {
+            if (_window.IsMaximized)
+                _window.Restore();
+            else
+                _window.Maximize();
+            return true;
+        }
+        else if (Icon.Bounds.Contains(location) && button == MouseButton.Left)
+        {
+            _window.Close(ClosingReason.User);
+            return true;
+        }
+        return base.OnMouseDoubleClick(location, button);
+    }
+
+    /// <inheritdoc />
+    protected override void PerformLayoutAfterChildren()
+    {
+        // Calculate extents for title bounds area excluding the icon and main menu area
+        float x = 0;
+        
+        // Icon
+        if (_icon != null)
+        {
+            _icon.X = x;
+            _icon.Size = new Float2(Height);
+            x += _icon.Width;
+        }
+
+        // Main menu if present
+        if (Parent.GetChild<MainMenu>() is MainMenu mainMenu)
+        {
+            for (int i = 0; i < mainMenu.Children.Count; i++)
+            {
+                var c = mainMenu.Children[i];
+                if (c is MainMenuButton b && c.Visible)
+                {
+                    b.Bounds = new Rectangle(x, 0, b.Width, Height);
+                    x += b.Width;
+                }
+            }
+        }
+     
+        // Buttons
+        float rightMostButtonX = Width;
+        if (_closeButton != null)
+        {
+            _closeButton.Height = Height;
+            _closeButton.X = rightMostButtonX - _closeButton.Width;
+            rightMostButtonX = _closeButton.X;
+        }
+        if (_maximizeButton != null)
+        {
+            _maximizeButton.Height = Height;
+            _maximizeButton.X = rightMostButtonX - _maximizeButton.Width;
+            rightMostButtonX = _maximizeButton.X;
+        }
+        if (_minimizeButton != null)
+        {
+            _minimizeButton.Height = Height;
+            _minimizeButton.X = rightMostButtonX - _minimizeButton.Width;
+            rightMostButtonX = _minimizeButton.X;
+        }
+
+        // Title
+        if (_title != null)
+        {
+            _title.Text = _window.Title;
+            _title.Bounds = new Rectangle(x, 0, rightMostButtonX - x, Height);
+        }
+    }
+    
+    /// <inheritdoc />
+    public override void Draw()
+    {
+        base.Draw();
+        DrawBorders();
+    }
+
+    /// <summary>
+    /// Draw borders around the window.
+    /// </summary>
+    public virtual void DrawBorders()
+    {
+        var win = RootWindow.Window;
+        if (win.IsMaximized)
+            return;
+
+        if (Editor.Instance.UI.StatusBar == null)
+            return;
+        
+        const float thickness = 1.0f;
+        Color color = Editor.Instance.UI.StatusBar.StatusColor;
+        Rectangle rect = new Rectangle(thickness * 0.5f, thickness * 0.5f, Parent.Width - thickness, Parent.Height - thickness);
+        Render2D.DrawRectangle(rect, color);
+    }
+
+    /// <inheritdoc />
+    public override void OnDestroy()
+    {
+        base.OnDestroy();
+
+        if (_window != null)
+        {
+            _window.Closed -= OnWindowClosed;
+            OnWindowClosed();
+        }
+    }
+}

Source/Editor/Managed/ManagedEditor.Internal.cpp

@@ -402,10 +402,11 @@ DEFINE_INTERNAL_CALL(void) EditorInternal_RunVisualScriptBreakpointLoopTick(floa
                 break;
             }
         }
+        WindowsManager::WindowsLocker.Unlock();
         for (const auto& e : inputEvents)
         {
             auto window = e.Target ? e.Target : defaultWindow;
-            if (!window)
+            if (!window || window->IsClosed())
                 continue;
             switch (e.Type)
             {
@@ -435,12 +436,14 @@ DEFINE_INTERNAL_CALL(void) EditorInternal_RunVisualScriptBreakpointLoopTick(floa
             case InputDevice::EventType::MouseMove:
                 window->OnMouseMove(window->ScreenToClient(e.MouseData.Position));
                 break;
+            case InputDevice::EventType::MouseMoveRelative:
+                window->OnMouseMoveRelative(e.MouseMovementData.PositionRelative);
+                break;
             case InputDevice::EventType::MouseLeave:
                 window->OnMouseLeave();
                 break;
             }
         }
-        WindowsManager::WindowsLocker.Unlock();
     }
     WindowsManager::WindowsLocker.Lock();
     Array<Window*, InlinedAllocation<32>> windows;

Source/Editor/Managed/ManagedEditor.cpp

@@ -13,6 +13,7 @@
 #include "Engine/Scripting/Internal/MainThreadManagedInvokeAction.h"
 #include "Engine/Content/Assets/VisualScript.h"
 #include "Engine/Content/Content.h"
+#include "Engine/Level/Actor.h"
 #include "Engine/CSG/CSGBuilder.h"
 #include "Engine/Engine/CommandLine.h"
 #include "Engine/Renderer/ProbesRenderer.h"
@@ -74,7 +75,7 @@ void OnLightmapsBuildFinished(bool failed)
         OnLightmapsBake(ShadowsOfMordor::BuildProgressStep::GenerateLightmapCharts, 0, 0, false);
 }
 
-void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
+void OnBakeEvent(bool started, Actor* e)
 {
     if (Internal_EnvProbeBake == nullptr)
     {
@@ -82,7 +83,7 @@ void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
         ASSERT(Internal_EnvProbeBake);
     }
 
-    MObject* probeObj = e.Actor ? e.Actor->GetManagedInstance() : nullptr;
+    MObject* probeObj = e ? e->GetManagedInstance() : nullptr;
 
     MainThreadManagedInvokeAction::ParamsBuilder params;
     params.AddParam(started);
@@ -90,12 +91,12 @@ void OnBakeEvent(bool started, const ProbesRenderer::Entry& e)
     MainThreadManagedInvokeAction::Invoke(Internal_EnvProbeBake, params);
 }
 
-void OnRegisterBake(const ProbesRenderer::Entry& e)
+void OnRegisterBake(Actor* e)
 {
     OnBakeEvent(true, e);
 }
 
-void OnFinishBake(const ProbesRenderer::Entry& e)
+void OnFinishBake(Actor* e)
 {
     OnBakeEvent(false, e);
 }
@@ -156,7 +157,9 @@ ManagedEditor::ManagedEditor()
     lightmapsBuilder->OnBuildProgress.Bind<OnLightmapsBuildProgress>();
     lightmapsBuilder->OnBuildFinished.Bind<OnLightmapsBuildFinished>();
     CSG::Builder::OnBrushModified.Bind<OnBrushModified>();
+#if LOG_ENABLE
     Log::Logger::OnMessage.Bind<OnLogMessage>();
+#endif
     VisualScripting::DebugFlow.Bind<OnVisualScriptingDebugFlow>();
 }
 
@@ -172,7 +175,9 @@ ManagedEditor::~ManagedEditor()
     lightmapsBuilder->OnBuildProgress.Unbind<OnLightmapsBuildProgress>();
     lightmapsBuilder->OnBuildFinished.Unbind<OnLightmapsBuildFinished>();
     CSG::Builder::OnBrushModified.Unbind<OnBrushModified>();
+#if LOG_ENABLE
     Log::Logger::OnMessage.Unbind<OnLogMessage>();
+#endif
     VisualScripting::DebugFlow.Unbind<OnVisualScriptingDebugFlow>();
 }
 

Source/Editor/Modules/ContentDatabaseModule.cs

@@ -1013,7 +1013,7 @@ namespace FlaxEditor.Modules
                     ContentItem item;
                     if (path.EndsWith(".cs"))
                         item = new CSharpScriptItem(path);
-                    else if (path.EndsWith(".cpp") || path.EndsWith(".h"))
+                    else if (path.EndsWith(".cpp") || path.EndsWith(".h") || path.EndsWith(".c") || path.EndsWith(".hpp"))
                         item = new CppScriptItem(path);
                     else if (path.EndsWith(".shader") || path.EndsWith(".hlsl"))
                         item = new ShaderSourceItem(path);
@@ -1135,6 +1135,7 @@ namespace FlaxEditor.Modules
             Proxy.Add(new FontProxy());
             Proxy.Add(new ShaderProxy());
             Proxy.Add(new ShaderSourceProxy());
+            Proxy.Add(new ShaderHeaderProxy());
             Proxy.Add(new ParticleEmitterProxy());
             Proxy.Add(new ParticleEmitterFunctionProxy());
             Proxy.Add(new ParticleSystemProxy());

Source/Editor/Modules/ContentImportingModule.cs

@@ -222,7 +222,7 @@ namespace FlaxEditor.Modules
                 outputExtension = extension;
 
                 // Check if can place source files here
-                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h"))
+                if (!targetLocation.CanHaveScripts && (extension == ".cs" || extension == ".cpp" || extension == ".h" || extension == ".c" || extension == ".hpp"))
                 {
                     // Error
                     Editor.LogWarning(string.Format("Cannot import \'{0}\' to \'{1}\'. The target directory cannot have scripts.", inputPath, targetLocation.Node.Path));

Source/Editor/Modules/EditorModule.cs

@@ -76,6 +76,13 @@ namespace FlaxEditor.Modules
         {
         }
 
+        /// <summary>
+        /// Called when Editor will leave the play mode.
+        /// </summary>
+        public virtual void OnPlayEnding()
+        {
+        }
+
         /// <summary>
         /// Called when Editor leaves the play mode.
         /// </summary>

Source/Editor/Modules/PrefabsModule.cs

@@ -255,12 +255,17 @@ namespace FlaxEditor.Modules
 
             // When applying changes to prefab from actor in level ignore it's root transformation (see ActorEditor.ProcessDiff)
             var originalTransform = instance.LocalTransform;
+            var originalName = instance.Name;
             if (instance.IsPrefabRoot && instance.HasScene)
+            {
                 instance.LocalTransform = prefab.GetDefaultInstance().Transform;
+                instance.Name = prefab.GetDefaultInstance().Name;
+            }
 
             // Call backend
             var failed = PrefabManager.Internal_ApplyAll(FlaxEngine.Object.GetUnmanagedPtr(instance));
             instance.LocalTransform = originalTransform;
+            instance.Name = originalName;
             if (failed)
                 throw new Exception("Failed to apply the prefab. See log to learn more.");
 

Source/Editor/Modules/SceneEditingModule.cs

@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using FlaxEditor.Actions;
 using FlaxEditor.SceneGraph;
+using FlaxEditor.SceneGraph.Actors;
 using FlaxEngine;
 
 namespace FlaxEditor.Modules
@@ -561,7 +562,8 @@ namespace FlaxEditor.Modules
         public void CreateParentForSelectedActors()
         {
             List<SceneGraphNode> selection = Editor.SceneEditing.Selection;
-            var actors = selection.Where(x => x is ActorNode).Select(x => ((ActorNode)x).Actor);
+            // Get Actors but skip scene node
+            var actors = selection.Where(x => x is ActorNode and not SceneNode).Select(x => ((ActorNode)x).Actor);
             var actorsCount = actors.Count();
             if (actorsCount == 0)
                 return;
@@ -709,7 +711,11 @@ namespace FlaxEditor.Modules
 
         private void OnActorChildNodesDispose(ActorNode node)
         {
+            if (Selection.Count == 0)
+                return;
+
             // TODO: cache if selection contains any actor child node and skip this loop if no need to iterate
+            // TODO: or build a hash set with selected nodes for quick O(1) checks (cached until selection changes)
 
             // Deselect child nodes
             for (int i = 0; i < node.ChildNodes.Count; i++)

Source/Editor/Modules/SceneModule.cs

@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using FlaxEditor.SceneGraph;
 using FlaxEditor.SceneGraph.Actors;
 using FlaxEngine;
@@ -658,6 +659,48 @@ namespace FlaxEditor.Modules
             //node?.TreeNode.OnActiveChanged();
         }
 
+        private void OnActorDestroyChildren(Actor actor)
+        {
+            // Instead of doing OnActorParentChanged for every child lets remove all of them at once from that actor
+            ActorNode node = GetActorNode(actor);
+            if (node != null)
+            {
+                if (Editor.SceneEditing.HasSthSelected)
+                {
+                    // Clear selection if one of the removed actors is selected
+                    var selection = new HashSet<Actor>();
+                    foreach (var e in Editor.SceneEditing.Selection)
+                    {
+                        if (e is ActorNode q && q.Actor)
+                            selection.Add(q.Actor);
+                    }
+                    var count = actor.ChildrenCount;
+                    for (int i = 0; i < count; i++)
+                    {
+                        var child = actor.GetChild(i);
+                        if (selection.Contains(child))
+                        {
+                            Editor.SceneEditing.Deselect();
+                            break;
+                        }
+                    }
+                }
+
+                // Remove all child nodes (upfront remove all nodes to run faster)
+                for (int i = 0; i < node.ChildNodes.Count; i++)
+                {
+                    if (node.ChildNodes[i] is ActorNode child)
+                        child.parentNode = null;
+                }
+                node.TreeNode.DisposeChildren();
+                for (int i = 0; i < node.ChildNodes.Count; i++)
+                {
+                    node.ChildNodes[i].Dispose();
+                }
+                node.ChildNodes.Clear();
+            }
+        }
+
         /// <summary>
         /// Gets the actor node.
         /// </summary>
@@ -709,6 +752,7 @@ namespace FlaxEditor.Modules
             Level.ActorOrderInParentChanged += OnActorOrderInParentChanged;
             Level.ActorNameChanged += OnActorNameChanged;
             Level.ActorActiveChanged += OnActorActiveChanged;
+            Level.ActorDestroyChildren += OnActorDestroyChildren;
         }
 
         /// <inheritdoc />
@@ -726,6 +770,7 @@ namespace FlaxEditor.Modules
             Level.ActorOrderInParentChanged -= OnActorOrderInParentChanged;
             Level.ActorNameChanged -= OnActorNameChanged;
             Level.ActorActiveChanged -= OnActorActiveChanged;
+            Level.ActorDestroyChildren -= OnActorDestroyChildren;
 
             // Cleanup graph
             Root.Dispose();

Source/Editor/Modules/SimulationModule.cs

@@ -267,7 +267,7 @@ namespace FlaxEditor.Modules
         }
 
         /// <inheritdoc />
-        public override void OnPlayBegin()
+        public override void OnPlayBeginning()
         {
             Editor.Windows.FlashMainWindow();
 
@@ -306,19 +306,21 @@ namespace FlaxEditor.Modules
         public override void OnPlayEnd()
         {
             var gameWin = Editor.Windows.GameWin;
-
+            if (gameWin != null)
-            switch (gameWin.FocusOnPlayOption)
             {
-            case Options.InterfaceOptions.PlayModeFocus.None: break;
+                switch (gameWin.FocusOnPlayOption)
-            case Options.InterfaceOptions.PlayModeFocus.GameWindow: break;
-            case Options.InterfaceOptions.PlayModeFocus.GameWindowThenRestore:
-                if (_previousWindow != null && !_previousWindow.IsDisposing)
                 {
-                    if (!Editor.Windows.GameWin.ParentDockPanel.ContainsTab(_previousWindow))
+                case Options.InterfaceOptions.PlayModeFocus.None: break;
-                        break;
+                case Options.InterfaceOptions.PlayModeFocus.GameWindow: break;
-                    _previousWindow.Focus();
+                case Options.InterfaceOptions.PlayModeFocus.GameWindowThenRestore:
+                    if (_previousWindow != null && !_previousWindow.IsDisposing)
+                    {
+                        if (!Editor.Windows.GameWin.ParentDockPanel.ContainsTab(_previousWindow))
+                            break;
+                        _previousWindow.Focus();
+                    }
+                    break;
                 }
-                break;
             }
 
             Editor.UI.UncheckPauseButton();

Source/Editor/Modules/UIModule.cs

@@ -16,7 +16,6 @@ using FlaxEditor.Windows;
 using FlaxEngine;
 using FlaxEngine.GUI;
 using FlaxEngine.Json;
-using DockHintWindow = FlaxEditor.GUI.Docking.DockHintWindow;
 using MasterDockPanel = FlaxEditor.GUI.Docking.MasterDockPanel;
 using FlaxEditor.Content.Settings;
 using FlaxEditor.Options;
@@ -29,6 +28,40 @@ namespace FlaxEditor.Modules
     /// <seealso cref="FlaxEditor.Modules.EditorModule" />
     public sealed class UIModule : EditorModule
     {
+        private class MainWindowDecorations : WindowDecorations
+        {
+            public MainWindowDecorations(RootControl window, bool iconOnly) 
+            : base(window, iconOnly)
+            {
+            }
+
+            /// <inheritdoc />
+            public override bool OnKeyDown(KeyboardKeys key)
+            {
+                if (base.OnKeyDown(key))
+                    return true;
+
+                // Fallback to the edit window for shortcuts
+                var editor = Editor.Instance;
+                return editor.Windows.EditWin.InputActions.Process(editor, this, key);
+            }
+            
+            /// <inheritdoc />
+            public override void DrawBorders()
+            {
+                // Draw main window borders if using a custom style
+                var win = RootWindow.Window;
+                if (win.IsMaximized)
+                    return;
+
+                var color = Editor.Instance.UI.StatusBar.StatusColor;
+                var rect = new Rectangle(0.5f, 0.5f, Parent.Width - 1.0f, Parent.Height - 1.0f - StatusBar.DefaultHeight);
+                Render2D.DrawLine(rect.UpperLeft, rect.UpperRight, color);
+                Render2D.DrawLine(rect.UpperLeft, rect.BottomLeft, color);
+                Render2D.DrawLine(rect.UpperRight, rect.BottomRight, color);
+            }
+        }
+        
         private Label _progressLabel;
         private ProgressBar _progressBar;
         private Button _outputLogButton;
@@ -97,6 +130,11 @@ namespace FlaxEditor.Modules
         /// </summary>
         public MainMenu MainMenu;
 
+        /// <summary>
+        /// The window decorations (title bar with buttons)
+        /// </summary>
+        public WindowDecorations WindowDecorations;
+
         /// <summary>
         /// The tool strip control.
         /// </summary>
@@ -377,19 +415,11 @@ namespace FlaxEditor.Modules
             InitToolstrip(mainWindow);
             InitStatusBar(mainWindow);
             InitDockPanel(mainWindow);
+            InitWindowDecorations(mainWindow);
 
             Editor.Options.OptionsChanged += OnOptionsChanged;
             
-            // Add dummy control for drawing the main window borders if using a custom style
+            mainWindow.PerformLayout(true);
-#if PLATFORM_WINDOWS
-            if (!Editor.Options.Options.Interface.UseNativeWindowSystem)
-#endif
-            {
-                mainWindow.AddChild(new CustomWindowBorderControl
-                {
-                    Size = Float2.Zero,
-                });
-            }
         }
 
         /// <inheritdoc />
@@ -410,23 +440,6 @@ namespace FlaxEditor.Modules
             }
         }
 
-        private class CustomWindowBorderControl : Control
-        {
-            /// <inheritdoc />
-            public override void Draw()
-            {
-                var win = RootWindow.Window;
-                if (win.IsMaximized)
-                    return;
-
-                var color = Editor.Instance.UI.StatusBar.StatusColor;
-                var rect = new Rectangle(0.5f, 0.5f, Parent.Width - 1.0f, Parent.Height - 1.0f - StatusBar.DefaultHeight);
-                Render2D.DrawLine(rect.UpperLeft, rect.UpperRight, color);
-                Render2D.DrawLine(rect.UpperLeft, rect.BottomLeft, color);
-                Render2D.DrawLine(rect.UpperRight, rect.BottomRight, color);
-            }
-        }
-
         /// <inheritdoc />
         public override void OnEndInit()
         {
@@ -458,13 +471,6 @@ namespace FlaxEditor.Modules
             UpdateToolstrip();
         }
 
-        /// <inheritdoc />
-        public override void OnExit()
-        {
-            // Cleanup dock panel hint proxy windows (Flax will destroy them by var but it's better to clear them earlier)
-            DockHintWindow.Proxy.Dispose();
-        }
-
         private IColorPickerDialog ShowPickColorDialog(Control targetControl, Color initialValue, ColorValueBox.ColorPickerEvent colorChanged, ColorValueBox.ColorPickerClosedEvent pickerClosed, bool useDynamicEditing)
         {
             var dialog = new ColorPickerDialog(initialValue, colorChanged, pickerClosed, useDynamicEditing);
@@ -518,10 +524,12 @@ namespace FlaxEditor.Modules
 
         private void InitMainMenu(RootControl mainWindow)
         {
-            MainMenu = new MainMenu(mainWindow)
+            MainMenu = new MainMenu()
             {
                 Parent = mainWindow
             };
+            if (Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
+                MainMenu.Height = 28;
 
             var inputOptions = Editor.Options.Options.Input;
 
@@ -628,19 +636,19 @@ namespace FlaxEditor.Modules
             MenuWindow = MainMenu.AddButton("Window");
             cm = MenuWindow.ContextMenu;
             cm.VisibleChanged += OnMenuWindowVisibleChanged;
-            cm.AddButton("Content", Editor.Windows.ContentWin.FocusOrShow);
+            cm.AddButton("Content", inputOptions.ContentWindow,Editor.Windows.ContentWin.FocusOrShow);
-            cm.AddButton("Scene", Editor.Windows.SceneWin.FocusOrShow);
+            cm.AddButton("Scene", inputOptions.SceneWindow, Editor.Windows.SceneWin.FocusOrShow);
-            cm.AddButton("Toolbox", Editor.Windows.ToolboxWin.FocusOrShow);
+            cm.AddButton("Toolbox", inputOptions.ToolboxWindow, Editor.Windows.ToolboxWin.FocusOrShow);
-            cm.AddButton("Properties", Editor.Windows.PropertiesWin.FocusOrShow);
+            cm.AddButton("Properties", inputOptions.PropertiesWindow, Editor.Windows.PropertiesWin.FocusOrShow);
-            cm.AddButton("Game", Editor.Windows.GameWin.FocusOrShow);
+            cm.AddButton("Game", inputOptions.GameWindow, Editor.Windows.GameWin.FocusOrShow);
-            cm.AddButton("Editor", Editor.Windows.EditWin.FocusOrShow);
+            cm.AddButton("Editor", inputOptions.EditorWindow, Editor.Windows.EditWin.FocusOrShow);
-            cm.AddButton("Debug Log", Editor.Windows.DebugLogWin.FocusOrShow);
+            cm.AddButton("Debug Log", inputOptions.DebugLogWindow, Editor.Windows.DebugLogWin.FocusOrShow);
-            cm.AddButton("Output Log", Editor.Windows.OutputLogWin.FocusOrShow);
+            cm.AddButton("Output Log", inputOptions.OutputLogWindow, Editor.Windows.OutputLogWin.FocusOrShow);
-            cm.AddButton("Graphics Quality", Editor.Windows.GraphicsQualityWin.FocusOrShow);
+            cm.AddButton("Graphics Quality", inputOptions.GraphicsQualityWindow, Editor.Windows.GraphicsQualityWin.FocusOrShow);
-            cm.AddButton("Game Cooker", Editor.Windows.GameCookerWin.FocusOrShow);
+            cm.AddButton("Game Cooker", inputOptions.GameCookerWindow, Editor.Windows.GameCookerWin.FocusOrShow);
             cm.AddButton("Profiler", inputOptions.ProfilerWindow, Editor.Windows.ProfilerWin.FocusOrShow);
-            cm.AddButton("Content Search", Editor.ContentFinding.ShowSearch);
+            cm.AddButton("Content Search", inputOptions.ContentSearchWindow, Editor.ContentFinding.ShowSearch);
-            cm.AddButton("Visual Script Debugger", Editor.Windows.VisualScriptDebuggerWin.FocusOrShow);
+            cm.AddButton("Visual Script Debugger", inputOptions.VisualScriptDebuggerWindow, Editor.Windows.VisualScriptDebuggerWin.FocusOrShow);
             cm.AddSeparator();
             cm.AddButton("Save window layout", Editor.Windows.SaveLayout);
             _menuWindowApplyWindowLayout = cm.AddChildMenu("Window layouts");
@@ -661,6 +669,20 @@ namespace FlaxEditor.Modules
             cm.AddButton("Information about Flax", () => new AboutDialog().Show());
         }
 
+        private void InitWindowDecorations(RootControl mainWindow)
+        {
+            ScriptsBuilder.GetBinariesConfiguration(out _, out _, out _, out var configuration);
+            var driver = Platform.DisplayServer;
+            if (!string.IsNullOrEmpty(driver))
+                driver = $" ({driver})";
+            
+            WindowDecorations = new MainWindowDecorations(mainWindow, !Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
+            {
+                Parent = mainWindow,
+                IconTooltipText = $"{mainWindow.RootWindow.Title}\nVersion {Globals.EngineVersion}\nConfiguration {configuration}\nGraphics {GPUDevice.Instance.RendererType}{driver}",
+            };
+        }
+        
         private void OnOptionsChanged(EditorOptions options)
         {
             var inputOptions = options.Input;
@@ -1070,6 +1092,7 @@ namespace FlaxEditor.Modules
         {
             // Clear UI references (GUI cannot be used after window closing)
             MainMenu = null;
+            WindowDecorations = null;
             ToolStrip = null;
             MasterPanel = null;
             StatusBar = null;

Source/Editor/Modules/WindowsModule.cs

@@ -10,7 +10,6 @@ using System.Text;
 using System.Xml;
 using FlaxEditor.Content;
 using FlaxEditor.GUI.Dialogs;
-using FlaxEditor.GUI.Docking;
 using FlaxEditor.Windows;
 using FlaxEditor.Windows.Assets;
 using FlaxEditor.Windows.Profiler;
@@ -758,17 +757,19 @@ namespace FlaxEditor.Modules
             var settings = CreateWindowSettings.Default;
             settings.Title = "Flax Editor";
             settings.Size = Platform.DesktopSize * 0.75f;
+            settings.MinimumSize = new Float2(200, 150);
             settings.StartPosition = WindowStartPosition.CenterScreen;
             settings.ShowAfterFirstPaint = true;
-#if PLATFORM_WINDOWS
+            
-            if (!Editor.Instance.Options.Options.Interface.UseNativeWindowSystem)
+            if (Utilities.Utils.UseCustomWindowDecorations(isMainWindow: true))
             {
                 settings.HasBorder = false;
-
+#if PLATFORM_WINDOWS && !PLATFORM_SDL
                 // Skip OS sizing frame and implement it using LeftButtonHit
                 settings.HasSizingFrame = false;
+#endif
             }
-#elif PLATFORM_LINUX
+#if PLATFORM_LINUX && !PLATFORM_SDL
             settings.HasBorder = false;
 #endif
             MainWindow = Platform.CreateWindow(ref settings);
@@ -1223,6 +1224,13 @@ namespace FlaxEditor.Modules
                 Windows[i].OnPlayBegin();
         }
 
+        /// <inheritdoc />
+        public override void OnPlayEnding()
+        {
+            for (int i = 0; i < Windows.Count; i++)
+                Windows[i].OnPlayEnding();
+        }
+
         /// <inheritdoc />
         public override void OnPlayEnd()
         {

Source/Editor/Options/InputOptions.cs

@@ -33,6 +33,25 @@ namespace FlaxEditor.Options
         OpenPrefab,
     }
 
+    /// <summary>
+    /// Shortcut availability in play mode.
+    /// </summary>
+    public enum PlayModeShortcutAvailability
+    {
+        /// <summary>
+        /// None of the window shortcuts will be available in play mode.
+        /// </summary>
+        None,
+        /// <summary>
+        /// Only the profiler window shortcut will be available in play mode.
+        /// </summary>
+        ProfilerOnly,
+        /// <summary>
+        /// All window shortcuts will be available in play mode.
+        /// </summary>
+        All,
+    }
+
     /// <summary>
     /// Input editor options data container.
     /// </summary>
@@ -40,6 +59,16 @@ namespace FlaxEditor.Options
     [HideInEditor]
     public sealed class InputOptions
     {
+        /// <summary>
+        /// Gets a value based on the current settings that indicates wether window shortcuts will be avaliable during play mode.
+        /// </summary>
+        public static bool WindowShortcutsAvaliable => !Editor.IsPlayMode || Editor.Instance.Options.Options.Input.PlayModeWindowShortcutAvaliability == PlayModeShortcutAvailability.All;
+
+        /// <summary>
+        /// Gets a value based on the current settings that indicates wether the profiler window shortcut will be avaliable during play mode.
+        /// </summary>
+        public static bool ProfilerShortcutAvaliable => WindowShortcutsAvaliable || Editor.Instance.Options.Options.Input.PlayModeWindowShortcutAvaliability == PlayModeShortcutAvailability.ProfilerOnly;
+
         #region Common
 
         [DefaultValue(typeof(InputBinding), "Ctrl+S")]
@@ -110,6 +139,10 @@ namespace FlaxEditor.Options
         [EditorDisplay("Common"), EditorOrder(240)]
         public InputBinding ToggleFullscreen = new InputBinding(KeyboardKeys.F11);
 
+        [DefaultValue(typeof(InputBinding), "Ctrl+BackQuote")]
+        [EditorDisplay("Common"), EditorOrder(250)]
+        public InputBinding FocusConsoleCommand = new InputBinding(KeyboardKeys.BackQuote, KeyboardKeys.Control);
+
         #endregion
 
         #region File
@@ -230,9 +263,9 @@ namespace FlaxEditor.Options
 
         #region Profiler
 
-        [DefaultValue(typeof(InputBinding), "None")]
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha7")]
         [EditorDisplay("Profiler", "Open Profiler Window"), EditorOrder(630)]
-        public InputBinding ProfilerWindow = new InputBinding(KeyboardKeys.None);
+        public InputBinding ProfilerWindow = new InputBinding(KeyboardKeys.Alpha7, KeyboardKeys.Control);
 
         [DefaultValue(typeof(InputBinding), "None")]
         [EditorDisplay("Profiler", "Start/Stop Profiler"), EditorOrder(631)]
@@ -356,24 +389,307 @@ namespace FlaxEditor.Options
 
         #endregion
 
+        #region Debug Views
+
+        [DefaultValue(typeof(InputBinding), "Alt+Alpha4")]
+        [EditorDisplay("Debug Views"), EditorOrder(2000)]
+        public InputBinding Default = new InputBinding(KeyboardKeys.Alpha4, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Alpha3")]
+        [EditorDisplay("Debug Views"), EditorOrder(2010)]
+        public InputBinding Unlit = new InputBinding(KeyboardKeys.Alpha3, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2020)]
+        public InputBinding NoPostFX = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Alpha2")]
+        [EditorDisplay("Debug Views"), EditorOrder(2030)]
+        public InputBinding Wireframe = new InputBinding(KeyboardKeys.Alpha2, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Alpha5")]
+        [EditorDisplay("Debug Views"), EditorOrder(2040)]
+        public InputBinding LightBuffer = new InputBinding(KeyboardKeys.Alpha5, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2050)]
+        public InputBinding ReflectionsBuffer = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2060)]
+        public InputBinding DepthBuffer = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2070)]
+        public InputBinding MotionVectors = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2080)]
+        public InputBinding LightmapUVDensity = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2090)]
+        public InputBinding VertexColors = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Alpha1")]
+        [EditorDisplay("Debug Views"), EditorOrder(2100)]
+        public InputBinding PhysicsColliders = new InputBinding(KeyboardKeys.Alpha1, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2110)]
+        public InputBinding LODPreview = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2120)]
+        public InputBinding MaterialComplexity = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2130)]
+        public InputBinding QuadOverdraw = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2140)]
+        public InputBinding GloablSDF = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2150)]
+        public InputBinding GlobalSurfaceAtlas = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Debug Views"), EditorOrder(2160)]
+        public InputBinding GlobalIllumination = new InputBinding(KeyboardKeys.None);
+
+        #endregion
+
+        #region View Flags
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3000)]
+        public InputBinding AntiAliasing = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3010)]
+        public InputBinding Shadows = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha7")]
+        [EditorDisplay("View Flags"), EditorOrder(3020)]
+        public InputBinding EditorSprites = new InputBinding(KeyboardKeys.Alpha7, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3030)]
+        public InputBinding Reflections = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3040)]
+        public InputBinding ScreenSpaceReflections = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3050)]
+        public InputBinding AmbientOcclusion = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha6")]
+        [EditorDisplay("View Flags", "Global Illumination"), EditorOrder(3060)]
+        public InputBinding GlobalIlluminationViewFlag = new InputBinding(KeyboardKeys.Alpha6, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3070)]
+        public InputBinding DirectionalLights = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3080)]
+        public InputBinding PointLights = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3090)]
+        public InputBinding SpotLights = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3100)]
+        public InputBinding SkyLights = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3110)]
+        public InputBinding Sky = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3120)]
+        public InputBinding Fog = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3130)]
+        public InputBinding SpecularLight = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3140)]
+        public InputBinding Decals = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha3")]
+        [EditorDisplay("View Flags"), EditorOrder(3150)]
+        public InputBinding CustomPostProcess = new InputBinding(KeyboardKeys.Alpha3, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3160)]
+        public InputBinding Bloom = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3170)]
+        public InputBinding ToneMapping = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha2")]
+        [EditorDisplay("View Flags"), EditorOrder(3180)]
+        public InputBinding EyeAdaptation = new InputBinding(KeyboardKeys.Alpha2, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3190)]
+        public InputBinding CameraArtifacts = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3200)]
+        public InputBinding LensFlares = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3210)]
+        public InputBinding DepthOfField = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3220)]
+        public InputBinding MotionBlur = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("View Flags"), EditorOrder(3230)]
+        public InputBinding ContactShadows = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha1")]
+        [EditorDisplay("View Flags"), EditorOrder(3240)]
+        public InputBinding PhysicsDebug = new InputBinding(KeyboardKeys.Alpha1, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha5")]
+        [EditorDisplay("View Flags"), EditorOrder(3250)]
+        public InputBinding LightsDebug = new InputBinding(KeyboardKeys.Alpha5, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Alpha4")]
+        [EditorDisplay("View Flags"), EditorOrder(3260)]
+        public InputBinding DebugDraw = new InputBinding(KeyboardKeys.Alpha4, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        #endregion
+
         #region Interface
 
         [DefaultValue(typeof(InputBinding), "Ctrl+W")]
-        [EditorDisplay("Interface"), EditorOrder(2000)]
+        [EditorDisplay("Interface"), EditorOrder(3500)]
         public InputBinding CloseTab = new InputBinding(KeyboardKeys.W, KeyboardKeys.Control);
 
         [DefaultValue(typeof(InputBinding), "Ctrl+Tab")]
-        [EditorDisplay("Interface"), EditorOrder(2010)]
+        [EditorDisplay("Interface"), EditorOrder(3510)]
         public InputBinding NextTab = new InputBinding(KeyboardKeys.Tab, KeyboardKeys.Control);
 
         [DefaultValue(typeof(InputBinding), "Shift+Ctrl+Tab")]
-        [EditorDisplay("Interface"), EditorOrder(2020)]
+        [EditorDisplay("Interface"), EditorOrder(3520)]
         public InputBinding PreviousTab = new InputBinding(KeyboardKeys.Tab, KeyboardKeys.Control, KeyboardKeys.Shift);
 
         [DefaultValue(SceneNodeDoubleClick.Expand)]
-        [EditorDisplay("Interface"), EditorOrder(2030)]
+        [EditorDisplay("Interface"), EditorOrder(3530)]
         public SceneNodeDoubleClick DoubleClickSceneNode = SceneNodeDoubleClick.Expand;
 
         #endregion
+
+        #region Windows
+
+        /// <summary>
+        /// Gets or sets a value indicating what window shortcuts will be available during play mode.
+        /// </summary>
+        [DefaultValue(PlayModeShortcutAvailability.ProfilerOnly)]
+        [EditorDisplay("Windows", "Avaliability in Play Mode"), EditorOrder(3000)]
+        public PlayModeShortcutAvailability PlayModeWindowShortcutAvaliability { get; set; } = PlayModeShortcutAvailability.ProfilerOnly;
+
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha5")]
+        [EditorDisplay("Windows"), EditorOrder(3010)]
+        public InputBinding ContentWindow = new InputBinding(KeyboardKeys.Alpha5, KeyboardKeys.Control);
+
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha4")]
+        [EditorDisplay("Windows"), EditorOrder(3020)]
+        public InputBinding SceneWindow = new InputBinding(KeyboardKeys.Alpha4, KeyboardKeys.Control);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(3030)]
+        public InputBinding ToolboxWindow = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha3")]
+        [EditorDisplay("Windows"), EditorOrder(3040)]
+        public InputBinding PropertiesWindow = new InputBinding(KeyboardKeys.Alpha3, KeyboardKeys.Control);
+
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha2")]
+        [EditorDisplay("Windows"), EditorOrder(3050)]
+        public InputBinding GameWindow = new InputBinding(KeyboardKeys.Alpha2, KeyboardKeys.Control);
+
+        [DefaultValue(typeof(InputBinding), "Ctrl+Alpha1")]
+        [EditorDisplay("Windows"), EditorOrder(3060)]
+        public InputBinding EditorWindow = new InputBinding(KeyboardKeys.Alpha1, KeyboardKeys.Control);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(3070)]
+        public InputBinding DebugLogWindow = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(3080)]
+        public InputBinding OutputLogWindow = new InputBinding(KeyboardKeys.C, KeyboardKeys.Control, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(3090)]
+        public InputBinding GraphicsQualityWindow = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(4000)]
+        public InputBinding GameCookerWindow = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(4010)]
+        public InputBinding ContentSearchWindow = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Windows"), EditorOrder(4020)]
+        public InputBinding VisualScriptDebuggerWindow = new InputBinding(KeyboardKeys.None);
+
+        #endregion
+
+        #region Node editors
+
+        [DefaultValue(typeof(InputBinding), "Shift+W")]
+        [EditorDisplay("Node editors"), EditorOrder(4500)]
+        public InputBinding NodesAlignTop = new InputBinding(KeyboardKeys.W, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Shift+A")]
+        [EditorDisplay("Node editors"), EditorOrder(4510)]
+        public InputBinding NodesAlignLeft = new InputBinding(KeyboardKeys.A, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Shift+S")]
+        [EditorDisplay("Node editors"), EditorOrder(4520)]
+        public InputBinding NodesAlignBottom = new InputBinding(KeyboardKeys.S, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Shift+D")]
+        [EditorDisplay("Node editors"), EditorOrder(4530)]
+        public InputBinding NodesAlignRight = new InputBinding(KeyboardKeys.D, KeyboardKeys.Shift);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Shift+W")]
+        [EditorDisplay("Node editors"), EditorOrder(4540)]
+        public InputBinding NodesAlignMiddle = new InputBinding(KeyboardKeys.W, KeyboardKeys.Shift, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "Alt+Shift+S")]
+        [EditorDisplay("Node editors"), EditorOrder(4550)]
+        public InputBinding NodesAlignCenter = new InputBinding(KeyboardKeys.S, KeyboardKeys.Shift, KeyboardKeys.Alt);
+
+        [DefaultValue(typeof(InputBinding), "Q")]
+        [EditorDisplay("Node editors"), EditorOrder(4560)]
+        public InputBinding NodesAutoFormat = new InputBinding(KeyboardKeys.Q);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Node editors"), EditorOrder(4570)]
+        public InputBinding NodesDistributeHorizontal = new InputBinding(KeyboardKeys.None);
+
+        [DefaultValue(typeof(InputBinding), "None")]
+        [EditorDisplay("Node editors"), EditorOrder(4580)]
+        public InputBinding NodesDistributeVertical = new InputBinding(KeyboardKeys.None);
+
+        #endregion
     }
 }

Source/Editor/Options/InterfaceOptions.cs

@@ -160,6 +160,34 @@ namespace FlaxEditor.Options
             GameWindowThenRestore,
         }
 
+        /// <summary>
+        /// Options for type of window decorations to use.
+        /// </summary>
+        public enum WindowDecorationsType
+        {
+            /// <summary>
+            /// Determined automatically based on the system and any known compatibility issues with native decorations.
+            /// </summary>
+            Auto,
+            
+            /// <summary>
+            /// Automatically choose most compatible window decorations for child windows, prefer custom decorations on main window.
+            /// </summary>
+            [EditorDisplay(Name = "Auto (Child Only)")]
+            AutoChildOnly,
+            
+            /// <summary>
+            /// Use native system window decorations on all windows.
+            /// </summary>
+            Native,
+            
+            /// <summary>
+            /// Use custom client-side window decorations on all windows.
+            /// </summary>
+            [EditorDisplay(Name = "Client-side")]
+            ClientSide,
+        }
+
         /// <summary>
         /// Gets or sets the Editor User Interface scale. Applied to all UI elements, windows and text. Can be used to scale the interface up on a bigger display. Editor restart required.
         /// </summary>
@@ -167,14 +195,12 @@ namespace FlaxEditor.Options
         [EditorDisplay("Interface"), EditorOrder(10), Tooltip("Editor User Interface scale. Applied to all UI elements, windows and text. Can be used to scale the interface up on a bigger display. Editor restart required.")]
         public float InterfaceScale { get; set; } = 1.0f;
         
-#if PLATFORM_WINDOWS
         /// <summary>
-        /// Gets or sets a value indicating whether use native window title bar. Editor restart required.
+        /// Gets or sets a value indicating whether use native window title bar decorations in child windows. Editor restart required.
         /// </summary>
-        [DefaultValue(false)]
+        [DefaultValue(WindowDecorationsType.AutoChildOnly)]
-        [EditorDisplay("Interface"), EditorOrder(70), Tooltip("Determines whether use native window title bar. Editor restart required.")]
+        [EditorDisplay("Interface"), EditorOrder(70), Tooltip("Determines whether use native window title bar decorations. Editor restart required.")]
-        public bool UseNativeWindowSystem { get; set; } = false;
+        public WindowDecorationsType WindowDecorations { get; set; } = WindowDecorationsType.AutoChildOnly;
-#endif
 
         /// <summary>
         /// Gets or sets a value indicating whether show selected camera preview in the editor window.

Source/Editor/ProjectInfo.cpp

@@ -6,6 +6,7 @@
 #include "Engine/Core/Log.h"
 #include "Engine/Engine/Globals.h"
 #include "Engine/Core/Math/Quaternion.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Serialization/JsonWriters.h"
 #include "Engine/Serialization/JsonTools.h"
 #include <ThirdParty/pugixml/pugixml.hpp>
@@ -327,6 +328,7 @@ ProjectInfo* ProjectInfo::Load(const String& path)
     }
 
     // Load
+    PROFILE_MEM(Editor);
     auto project = New<ProjectInfo>();
     if (project->LoadProject(path))
     {

Source/Editor/SceneGraph/ActorNodeWithIcon.cs

@@ -35,7 +35,8 @@ namespace FlaxEditor.SceneGraph
                 return false;
             }
 
-            BoundingSphere sphere = new BoundingSphere(Transform.Translation, 7.0f);
+            var center = _actor.Transform.Translation;
+            ViewportIconsRenderer.GetBounds(ref center, ref ray.Ray.Position, out var sphere);
             return CollisionsHelper.RayIntersectsSphere(ref ray.Ray, ref sphere, out distance);
         }
     }

Source/Editor/SceneGraph/Actors/TerrainNode.cs

@@ -76,9 +76,13 @@ namespace FlaxEditor.SceneGraph.Actors
                     // Skip removing this terrain file sif it's still referenced
                     var sceneReferences = Editor.GetAssetReferences(e.SceneId);
                     if (sceneReferences != null && sceneReferences.Contains(e.TerrainId))
+                    {
+                        Debug.Log($"Skip removing files used by terrain {e.TerrainId} on scene {e.SceneId} as it's still in use");
                         continue;
+                    }
 
                     // Delete files
+                    Debug.Log($"Removing files used by removed terrain {e.TerrainId} on scene {e.SceneId}");
                     foreach (var file in e.Files)
                     {
                         if (file != null && File.Exists(file))

Source/Editor/SceneGraph/Actors/VideoPlayerEditor.cs

@@ -28,7 +28,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 _infoLabel = playbackGroup.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
 
-                var grid = playbackGroup.CustomContainer<UniformGridPanel>();
+                var grid = layout.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;

Source/Editor/SceneGraph/GUI/ActorTreeNode.cs

@@ -320,7 +320,7 @@ namespace FlaxEditor.SceneGraph.GUI
             if (noFilter && actor != null)
             {
                 // Pick the correct id when inside a prefab window.
-                var id = actor.HasPrefabLink && actor.Scene.Scene == null ? actor.PrefabObjectID : actor.ID;
+                var id = actor.HasPrefabLink && actor.Scene == null ? actor.PrefabObjectID : actor.ID;
                 isExpanded = Editor.Instance.ProjectCache.IsExpandedActor(ref id);
             }
 

Source/Editor/SceneGraph/SceneGraphNode.cs

@@ -27,7 +27,7 @@ namespace FlaxEditor.SceneGraph
         /// <summary>
         /// The parent node.
         /// </summary>
-        protected SceneGraphNode parentNode;
+        internal SceneGraphNode parentNode;
 
         /// <summary>
         /// Gets the children list.

Source/Editor/Scripting/CodeEditor.cpp

@@ -13,6 +13,7 @@
 #include "Engine/Engine/EngineService.h"
 #include "Engine/Platform/Thread.h"
 #include "Engine/Threading/IRunnable.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 
 void OnAsyncBegin(Thread* thread);
 void OnAsyncEnd();
@@ -232,6 +233,8 @@ void OnAsyncEnd()
 
 bool CodeEditingManagerService::Init()
 {
+    PROFILE_MEM(Editor);
+
     // Try get editors
 #if USE_VISUAL_STUDIO_DTE
     VisualStudioEditor::FindEditors(&CodeEditors);

Source/Editor/Scripting/ScriptsBuilder.cpp

@@ -23,6 +23,7 @@
 #include "Engine/Scripting/Scripting.h"
 #include "Engine/Scripting/Script.h"
 #include "Engine/Profiler/ProfilerCPU.h"
+#include "Engine/Profiler/ProfilerMemory.h"
 #include "Engine/Level/Level.h"
 #include "FlaxEngine.Gen.h"
 
@@ -77,7 +78,7 @@ namespace ScriptsBuilderImpl
     void onScriptsReloadEnd();
     void onScriptsLoaded();
 
-    void GetClassName(const StringAnsi& fullname, StringAnsi& className);
+    void GetClassName(const StringAnsiView fullname, StringAnsi& className);
 
     void onCodeEditorAsyncOpenBegin()
     {
@@ -120,9 +121,13 @@ void ScriptsBuilderImpl::sourceDirEvent(const String& path, FileSystemAction act
     // Discard non-source files or generated files
     if ((!path.EndsWith(TEXT(".cs")) &&
         !path.EndsWith(TEXT(".cpp")) &&
+        !path.EndsWith(TEXT(".c")) &&
+        !path.EndsWith(TEXT(".hpp")) &&
         !path.EndsWith(TEXT(".h"))) ||
         path.EndsWith(TEXT(".Gen.cs")))
+    {
         return;
+    }
 
     ScopeLock scopeLock(_locker);
     _lastSourceCodeEdited = DateTime::Now();
@@ -272,7 +277,7 @@ bool ScriptsBuilder::GenerateProject(const StringView& customArgs)
     return RunBuildTool(args);
 }
 
-void ScriptsBuilderImpl::GetClassName(const StringAnsi& fullname, StringAnsi& className)
+void ScriptsBuilderImpl::GetClassName(const StringAnsiView fullname, StringAnsi& className)
 {
     const auto lastDotIndex = fullname.FindLast('.');
     if (lastDotIndex != -1)
@@ -413,6 +418,7 @@ void ScriptsBuilder::GetBinariesConfiguration(const Char*& target, const Char*&
 
 bool ScriptsBuilderImpl::compileGameScriptsAsyncInner()
 {
+    PROFILE_MEM(Editor);
     LOG(Info, "Starting scripts compilation...");
     CallEvent(EventType::CompileStarted);
 
@@ -519,6 +525,8 @@ void ScriptsBuilderImpl::onEditorAssemblyUnloading(MAssembly* assembly)
 
 bool ScriptsBuilderImpl::compileGameScriptsAsync()
 {
+    PROFILE_MEM(Editor);
+
     // Start
     {
         ScopeLock scopeLock(_locker);
@@ -562,6 +570,7 @@ bool ScriptsBuilderService::Init()
     // Check flag
     if (_isInited)
         return false;
+    PROFILE_MEM(Editor);
     _isInited = true;
 
     // Link for Editor assembly unload event to clear cached Internal_OnCompilationEnd to prevent errors
@@ -659,6 +668,9 @@ bool ScriptsBuilderService::Init()
 
 void ScriptsBuilderService::Update()
 {
+    PROFILE_CPU();
+    PROFILE_MEM(Editor);
+
     // Send compilation events
     {
         ScopeLock scopeLock(_compileEventsLocker);