_mac python fix

#2325 #3247

.github/ISSUE_TEMPLATE/1-bug.yaml

@@ -0,0 +1,42 @@
+name: Bug Report
+description: File a bug report.
+title: "[Bug]: "
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report! Please attach any minimal reproduction projects!
+  - type: textarea
+    id: description-area
+    attributes:
+      label: Description
+      description: Please provide a description of the bug and what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    id: steps-area
+    attributes:
+      label: Steps to reproduce
+      description: Please provide reproduction steps if possible.
+    validations:
+      required: true
+  - type: dropdown
+    id: version
+    attributes:
+      label: Version
+      description: What version of Flax are you running?
+      options:
+        - '1.8'
+        - '1.9'
+        - '1.10'
+        - '1.11'
+        - master branch
+      default: 2
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant logs
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+      render: shell

.github/ISSUE_TEMPLATE/2-feature-request.yaml

@@ -0,0 +1,22 @@
+name: Feature Request
+description: File a feature request.
+title: "[Request]: "
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out a feature request!
+  - type: textarea
+    id: description-area
+    attributes:
+      label: Description
+      description: Please provide a description of the feature!
+    validations:
+      required: true
+  - type: textarea
+    id: benefits-area
+    attributes:
+      label: Benefits
+      description: Please provide what benefits this feature would provide to the engine!
+    validations:
+      required: true

.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/Decal.shader

@@ -13,7 +13,7 @@
 META_CB_BEGIN(0, Data)
 float4x4 WorldMatrix;
 float4x4 InvWorld;
-float4x4 SVPositionToWorld;
+float4x4 SvPositionToWorld;
 @1META_CB_END
 
 // Use depth buffer for per-pixel decal layering
@@ -27,12 +27,63 @@ struct MaterialInput
 	float3 WorldPosition;
 	float TwoSidedSign;
 	float2 TexCoord;
+	float4 TexCoord_DDX_DDY;
 	float3x3 TBN;
 	float4 SvPosition;
 	float3 PreSkinnedPosition;
 	float3 PreSkinnedNormal;
 };
 
+// Calculates decal texcoords for a given pixel position (sampels depth buffer and projects value to decal space).
+float2 SvPositionToDecalUV(float4 svPosition)
+{
+	float2 screenUV = svPosition.xy * ScreenSize.zw;
+	svPosition.z = SAMPLE_RT(DepthBuffer, screenUV).r;
+	float4 positionHS = mul(float4(svPosition.xyz, 1), SvPositionToWorld);
+	float3 positionWS = positionHS.xyz / positionHS.w;
+	float3 positionOS = mul(float4(positionWS, 1), InvWorld).xyz;
+	return positionOS.xz + 0.5f;
+}
+
+// Manually compute ddx/ddy for decal texture cooordinates to avoid the 2x2 pixels artifacts on the edges of geometry under decal
+// [Reference: https://www.humus.name/index.php?page=3D&ID=84]
+float4 CalculateTextureDerivatives(float4 svPosition, float2 texCoord)
+{
+	float4 svDiffX = float4(1, 0, 0, 0);
+	float2 uvDiffX0 = texCoord - SvPositionToDecalUV(svPosition - svDiffX);
+	float2 uvDiffX1 = SvPositionToDecalUV(svPosition + svDiffX) - texCoord;
+	float2 dx = dot(uvDiffX0, uvDiffX0) < dot(uvDiffX1, uvDiffX1) ? uvDiffX0 : uvDiffX1;
+
+	float4 svDiffY = float4(0, 1, 0, 0);
+	float2 uvDiffY0 = texCoord - SvPositionToDecalUV(svPosition - svDiffY);
+	float2 uvDiffY1 = SvPositionToDecalUV(svPosition + svDiffY) - texCoord;
+	float2 dy = dot(uvDiffY0, uvDiffY0) < dot(uvDiffY1, uvDiffY1) ? uvDiffY0 : uvDiffY1;
+
+	return float4(dx, dy);
+}
+
+// Computes the mipmap level for a specific texture dimensions to be sampled at decal texture cooordinates.
+// [Reference: https://hugi.scene.org/online/coding/hugi%2014%20-%20comipmap.htm]
+float CalculateTextureMipmap(MaterialInput input, float2 textureSize)
+{
+	float2 dx = input.TexCoord_DDX_DDY.xy * textureSize;
+	float2 dy = input.TexCoord_DDX_DDY.zw * textureSize;
+	float d = max(dot(dx, dx), dot(dy, dy));
+	return (0.5 * 0.5) * log2(d); // Hardcoded half-mip rate reduction to avoid artifacts when decal is moved over dither texture
+}
+float CalculateTextureMipmap(MaterialInput input, Texture2D t)
+{
+	float2 textureSize;
+	t.GetDimensions(textureSize.x, textureSize.y);
+	return CalculateTextureMipmap(input, textureSize);
+}
+float CalculateTextureMipmap(MaterialInput input, TextureCube t)
+{
+	float2 textureSize;
+	t.GetDimensions(textureSize.x, textureSize.y);
+	return CalculateTextureMipmap(input, textureSize);
+}
+
 // Transforms a vector from tangent space to world space
 float3 TransformTangentVectorToWorld(MaterialInput input, float3 tangentVector)
 {
@@ -116,7 +167,6 @@ Material GetMaterialPS(MaterialInput input)
 }
 
 // Input macro specified by the material: DECAL_BLEND_MODE
-
 #define DECAL_BLEND_MODE_TRANSLUCENT 0
 #define DECAL_BLEND_MODE_STAIN       1
 #define DECAL_BLEND_MODE_NORMAL      2
@@ -153,7 +203,7 @@ void PS_Decal(
 	float2 screenUV = SvPosition.xy * ScreenSize.zw;
 	SvPosition.z = SAMPLE_RT(DepthBuffer, screenUV).r;
 
-	float4 positionHS = mul(float4(SvPosition.xyz, 1), SVPositionToWorld);
+	float4 positionHS = mul(float4(SvPosition.xyz, 1), SvPositionToWorld);
 	float3 positionWS = positionHS.xyz / positionHS.w;
 	float3 positionOS = mul(float4(positionWS, 1), InvWorld).xyz;
 
@@ -166,8 +216,9 @@ void PS_Decal(
 	materialInput.TexCoord = decalUVs;
 	materialInput.TwoSidedSign = 1;
 	materialInput.SvPosition = SvPosition;
-	
-	// Build tangent to world transformation matrix
+	materialInput.TexCoord_DDX_DDY = CalculateTextureDerivatives(materialInput.SvPosition, materialInput.TexCoord);
+
+	// Calculate tangent-space
 	float3 ddxWp = ddx(positionWS);
 	float3 ddyWp = ddy(positionWS);
 	materialInput.TBN[0] = normalize(ddyWp);

Content/Editor/MaterialTemplates/Features/ForwardShading.hlsl

@@ -27,6 +27,7 @@ TextureCube EnvProbe : register(t__SRV__);
 TextureCube SkyLightTexture : register(t__SRV__);
 Buffer<float4> ShadowsBuffer : register(t__SRV__);
 Texture2D<float> ShadowMap : register(t__SRV__);
+Texture3D VolumetricFogTexture : register(t__SRV__);
 @4// Forward Shading: Utilities
 @5// Forward Shading: Shaders
 
@@ -143,9 +144,21 @@ 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);
+
+	if (ExponentialHeightFog.VolumetricFogMaxDistance > 0)
+	{
+		// Sample volumetric fog and mix it in
+		float2 screenUV = materialInput.SvPosition.xy * ScreenSize.zw;
+		float3 viewVector = materialInput.WorldPosition - ViewPos;
+		float sceneDepth = length(viewVector);
+		float depthSlice = sceneDepth / ExponentialHeightFog.VolumetricFogMaxDistance;
+		float3 volumeUV = float3(screenUV, depthSlice);
+		float4 volumetricFog = VolumetricFogTexture.SampleLevel(SamplerLinearClamp, volumeUV, 0);
+		fog = CombineVolumetricFog(fog, volumetricFog);
+	}
 
 	// Apply fog to the output color
 #if MATERIAL_BLEND == MATERIAL_BLEND_OPAQUE

Content/Editor/MaterialTemplates/GUI.shader

@@ -20,6 +20,8 @@ float TimeParam;
 float4 ViewInfo;
 float4 ScreenSize;
 float4 ViewSize;
+float3 ViewPadding0;
+float UnscaledTimeParam;
 @1META_CB_END
 
 // Shader resources

Content/Editor/MaterialTemplates/Particle.shader

@@ -645,7 +645,7 @@ VertexOutput VS_Ribbon(RibbonInput input, uint vertexIndex : SV_VertexID)
 	materialInput.TBN = output.TBN;
 	materialInput.TwoSidedSign = 1;
 	materialInput.SvPosition = output.Position;
-	materialInput.PreSkinnedPosition = Position;
+	materialInput.PreSkinnedPosition = position;
 	materialInput.PreSkinnedNormal = tangentToLocal[2].xyz;
 	materialInput.InstanceOrigin = output.InstanceOrigin;
 	materialInput.InstanceParams = output.InstanceParams;	

Content/Editor/MaterialTemplates/PostProcess.shader

@@ -19,6 +19,8 @@ float4 ViewInfo;
 float4 ScreenSize;
 float4 TemporalAAJitter;
 float4x4 InverseViewProjectionMatrix;
+float3 ViewPadding0;
+float UnscaledTimeParam;
 @1META_CB_END
 
 // Shader resources

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;
-	float3 normal = float3(normalTemp.x, sqrt(1.0 - saturate(dot(normalTemp, normalTemp))), normalTemp.y);
-	normal = normalize(normal);
+	bool isHole;
+	float3 normal = DecodeHeightmapNormal(heightmapValue, isHole);
 	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

@@ -13,6 +13,7 @@
   "Configuration": {
     "UseCSharp": true,
     "UseLargeWorlds": false,
-    "UseDotNet": true
+    "UseDotNet": true,
+    "UseSDL": true
   }
 }

Flax.sln.DotSettings

@@ -73,6 +73,24 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=TYPEDEF/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=UNION/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CppNaming/UserRules/=UNION_005FMEMBER/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aa_bb" /&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=CCD/@EntryIndexedValue">CCD</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=GPU/@EntryIndexedValue">GPU</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Abbreviations/=ID/@EntryIndexedValue">ID</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=175CE9C669E52F4D92FD2C07848740BD/@EntryIndexedValue">&lt;NamingElement Priority="11" Title="Class and struct public fields"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="PUBLIC"&gt;&lt;type Name="class field" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=32EB6D69783B3E4481A733193E338089/@EntryIndexedValue">&lt;NamingElement Priority="9" Title="Class and struct methods"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="member function" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=3C4E0D59F298854F9608A9B454E8FF5E/@EntryIndexedValue">&lt;NamingElement Priority="17" Title="Typedefs"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="type alias" /&gt;&lt;type Name="typedef" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=499C9026DADA2B448BCD0B2C54746A59/@EntryIndexedValue">&lt;NamingElement Priority="14" Title="Other constants"&gt;&lt;Descriptor Static="True" Constexpr="Indeterminate" Const="True" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="class field" /&gt;&lt;type Name="local variable" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=50D2535711CE1A43A3B06EF841C36CFD/@EntryIndexedValue">&lt;NamingElement Priority="13" Title="Enum members"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="scoped enumerator" /&gt;&lt;type Name="unscoped enumerator" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=6AD3BADA1260CC4D840AB26323C51827/@EntryIndexedValue">&lt;NamingElement Priority="15" Title="Global constants"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="True" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="global variable" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=904CDCA174AACE4AA52660A247CDF9A0/@EntryIndexedValue">&lt;NamingElement Priority="7" Title="Global variables"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="global variable" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=95BCDE767C97B64DB3DAE800DBBBC758/@EntryIndexedValue">&lt;NamingElement Priority="5" Title="Parameters"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="function parameter" /&gt;&lt;type Name="lambda parameter" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=C03AE454FC2CBA43819AC75E4D6C9C8C/@EntryIndexedValue">&lt;NamingElement Priority="1" Title="Classes and structs"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="__interface" /&gt;&lt;type Name="class" /&gt;&lt;type Name="struct" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=D49E31C610641E4CAD0407DB79ACC851/@EntryIndexedValue">&lt;NamingElement Priority="8" Title="Global functions"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="global function" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=D73FBB3529BC5449B6C85BB37B26A8D4/@EntryIndexedValue">&lt;NamingElement Priority="16" Title="Namespaces"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="namespace" /&gt;&lt;type Name="namespace alias" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=DA41807CE47AEB4CBE1724C44D0B786E/@EntryIndexedValue">&lt;NamingElement Priority="6" Title="Local variables"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="local variable" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=DDF30C9A1DA74B4DBBC56D25FDF886AA/@EntryIndexedValue">&lt;NamingElement Priority="10" Title="Class and struct fields"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="class field" /&gt;&lt;type Name="struct field" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="_" Suffix="" Style="aaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=EF70A6BF54ACE446971DDB32344C25A3/@EntryIndexedValue">&lt;NamingElement Priority="12" Title="Union members"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="union member" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CppNamingOptions/Rules/=F37818C54C323A4A80B1A478629985AE/@EntryIndexedValue">&lt;NamingElement Priority="2" Title="Enums"&gt;&lt;Descriptor Static="Indeterminate" Constexpr="Indeterminate" Const="Indeterminate" Volatile="Indeterminate" Accessibility="NOT_APPLICABLE"&gt;&lt;type Name="enum" /&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" WarnAboutPrefixesAndSuffixes="False" Prefix="" Suffix="" Style="AaBb" /&gt;&lt;/NamingElement&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=AI/@EntryIndexedValue">AI</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=ARGB/@EntryIndexedValue">ARGB</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LO/@EntryIndexedValue">LO</s:String>
@@ -213,6 +231,7 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=YZ/@EntryIndexedValue">YZ</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PublicFields/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb"&gt;&lt;ExtraRule Prefix="_" Suffix="" Style="aaBb" /&gt;&lt;/Policy&gt;</s:String>
 	<s:String x:Key="/Default/Environment/Hierarchy/PsiConfigurationSettingsKey/CustomLocation/@EntryValue">C:\Users\Wojtek\AppData\Local\JetBrains\Transient\ReSharperPlatformVs15\v08_f9eacea9\SolutionCaches</s:String>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ENaming_002ECppNamingOptionsMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ESettingsUpgrade_002EFunctionReturnStyleSettingsUpgrader/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECpp_002ECodeStyle_002ESettingsUpgrade_002ENamespaceIndentationSettingsUpgrader/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpAttributeForSingleLineMethodUpgrade/@EntryIndexedValue">True</s:Boolean>
@@ -267,6 +286,7 @@
 	<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>

ISSUE_TEMPLATE.md

@@ -1,19 +0,0 @@
-<!-- Please search existing issues for potential duplicates before filing yours:
-https://github.com/flaxengine/FlaxEngine/issues?q=is%3Aissue
--->
-
-**Issue description:**
-<!-- What happened, and what was expected. -->
-<!-- Log file, can be found in the project directory's `Logs` folder (optional) -->
-
-**Steps to reproduce:**
-<!-- Enter minimal reproduction steps if available. -->
-
-
-**Minimal reproduction project:**
-<!-- Recommended as it greatly speeds up debugging. Drag and drop a zip archive to upload it. -->
-
-
-**Flax version:**
-<!-- Specify version number. -->
-

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`
-  * Arch: `sudo pacman -S base-devel libx11 libxcursor libxinerama zlib`
+  * Ubuntu: `sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev zlib1g-dev zenity wayland-protocols libportal-dev`
+  * 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/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>
@@ -111,7 +117,8 @@ namespace FlaxEditor.Content.Create
 
             private static bool IsValid(Type type)
             {
-                return (type.IsPublic || type.IsNestedPublic) && !type.IsAbstract && !type.IsGenericType;
+                var controlTypes = Editor.Instance.CodeEditing.Controls.Get();
+                return (type.IsPublic || type.IsNestedPublic) && !type.IsAbstract && !type.IsGenericType && controlTypes.Contains(new ScriptType(type));
             }
         }
 

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" />
-    [ContentContextMenu("New/Shader Source")]
-    public class ShaderSourceProxy : ContentProxy
+    public abstract class ShaderBaseProxy : 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/CustomEditorWindow.cs

@@ -18,8 +18,8 @@ namespace FlaxEditor
             private readonly CustomEditorPresenter _presenter;
             private CustomEditorWindow _customEditor;
 
-            public Win(CustomEditorWindow customEditor)
-            : base(Editor.Instance, false, ScrollBars.Vertical)
+            public Win(CustomEditorWindow customEditor, bool hideOnClose, ScrollBars scrollBars)
+            : base(Editor.Instance, hideOnClose, scrollBars)
             {
                 Title = customEditor.GetType().Name;
                 _customEditor = customEditor;
@@ -64,9 +64,9 @@ namespace FlaxEditor
         /// <summary>
         /// Initializes a new instance of the <see cref="CustomEditorWindow"/> class.
         /// </summary>
-        protected CustomEditorWindow()
+        protected CustomEditorWindow(bool hideOnClose = false, ScrollBars scrollBars = ScrollBars.Vertical)
         {
-            _win = new Win(this);
+            _win = new Win(this, hideOnClose, scrollBars);
             ScriptsBuilder.ScriptsReloadBegin += OnScriptsReloadBegin;
         }
 

Source/Editor/CustomEditors/CustomEditor.cs

@@ -749,6 +749,15 @@ namespace FlaxEditor.CustomEditors
             }
         }
 
+        private Actor FindActor(CustomEditor editor)
+        {
+            if (editor.Values[0] is Actor actor)
+                return actor;
+            if (editor.ParentEditor != null)
+                return FindActor(editor.ParentEditor);
+            return null;
+        }
+
         private Actor FindPrefabRoot(CustomEditor editor)
         {
             if (editor.Values[0] is Actor actor)
@@ -767,32 +776,35 @@ namespace FlaxEditor.CustomEditors
             return FindPrefabRoot(actor.Parent);
         }
 
-        private SceneObject FindObjectWithPrefabObjectId(Actor actor, ref Guid prefabObjectId)
+        private SceneObject FindObjectWithPrefabObjectId(Actor actor, ref Guid prefabObjectId, Actor endPoint)
         {
+            var visited = new HashSet<Actor>();
+            return FindObjectWithPrefabObjectId(actor, ref prefabObjectId, endPoint, visited);
+        }
+
+        private SceneObject FindObjectWithPrefabObjectId(Actor actor, ref Guid prefabObjectId, Actor endPoint, HashSet<Actor> visited)
+        {
+            if (visited.Contains(actor) || actor is Scene || actor == endPoint)
+                return null;
             if (actor.PrefabObjectID == prefabObjectId)
                 return actor;
 
             for (int i = 0; i < actor.ScriptsCount; i++)
             {
-                if (actor.GetScript(i).PrefabObjectID == prefabObjectId)
-                {
-                    var a = actor.GetScript(i);
-                    if (a != null)
-                        return a;
-                }
+                var script = actor.GetScript(i);
+                if (script != null && script.PrefabObjectID == prefabObjectId)
+                    return script;
             }
 
             for (int i = 0; i < actor.ChildrenCount; i++)
             {
-                if (actor.GetChild(i).PrefabObjectID == prefabObjectId)
-                {
-                    var a = actor.GetChild(i);
-                    if (a != null)
-                        return a;
-                }
+                var child = actor.GetChild(i);
+                if (child != null && child.PrefabObjectID == prefabObjectId)
+                    return child;
             }
 
-            return null;
+            // Go up in the hierarchy
+            return FindObjectWithPrefabObjectId(actor.Parent, ref prefabObjectId, endPoint, visited);
         }
 
         /// <summary>
@@ -826,7 +838,7 @@ namespace FlaxEditor.CustomEditors
                 }
 
                 var prefabObjectId = referenceSceneObject.PrefabObjectID;
-                var prefabInstanceRef = FindObjectWithPrefabObjectId(prefabInstanceRoot, ref prefabObjectId);
+                var prefabInstanceRef = FindObjectWithPrefabObjectId(FindActor(this), ref prefabObjectId, prefabInstanceRoot);
                 if (prefabInstanceRef == null)
                 {
                     Editor.LogWarning("Missing prefab instance reference in the prefab instance. Cannot revert to it.");

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 +53,21 @@ 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>
+        /// Gets the scene editing context.
+        /// </summary>
+        public ISceneEditingContext SceneContext { get; }
     }
 
     /// <summary>
@@ -81,6 +97,8 @@ namespace FlaxEditor.CustomEditors
                 Offsets = Margin.Zero;
                 Pivot = Float2.Zero;
                 IsScrollable = true;
+                Spacing = Utilities.Constants.UIMargin;
+                Margin = new Margin(Utilities.Constants.UIMargin);
             }
 
             /// <inheritdoc />
@@ -95,7 +113,7 @@ 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.cs

@@ -87,8 +87,11 @@ namespace FlaxEditor.CustomEditors
             var targetTypeType = TypeUtils.GetType(targetType);
             if (canUseRefPicker)
             {
+                // TODO: add generic way of CustomEditor for ref pickers (use it on AssetRefEditor/GPUTextureEditor/...)
                 if (typeof(Asset).IsAssignableFrom(targetTypeType))
                     return new AssetRefEditor();
+                if (typeof(GPUTexture).IsAssignableFrom(targetTypeType))
+                    return new GPUTextureEditor();
                 if (typeof(FlaxEngine.Object).IsAssignableFrom(targetTypeType))
                     return new FlaxObjectRefEditor();
             }

Source/Editor/CustomEditors/Dedicated/ActorEditor.cs

@@ -1,22 +1,20 @@
 // Copyright (c) Wojciech Figat. All rights reserved.
 
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using FlaxEditor.Actions;
 using FlaxEditor.CustomEditors.Editors;
 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;
 using FlaxEngine;
 using FlaxEngine.GUI;
 using FlaxEngine.Json;
 using FlaxEngine.Utilities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace FlaxEditor.CustomEditors.Dedicated
 {
@@ -71,14 +69,14 @@ 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)
                         {
                             var targetPrefab = nestedPrefab ?? prefab;
                             panel.CustomControl.SlotsHorizontally = 3;
-                            
+
                             // Selecting actor prefab asset
                             var selectPrefab = panel.Button("Select Prefab");
                             selectPrefab.Button.Clicked += () =>
@@ -133,35 +131,22 @@ 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();
-                        Editor.Instance.SceneEditing.Select(null);
-                        Editor.Instance.SceneEditing.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);
+                        var cachedSelection = owner.Selection.ToList();
+                        owner.Select(null);
+                        owner.Select(cachedSelection);
                     }
                 };
             }
@@ -254,11 +239,27 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 node.TextColor = Color.OrangeRed;
                 node.Text = Utilities.Utils.GetPropertyNameUI(removed.PrefabObject.GetType().Name);
             }
+            // Removed Actor
+            else if (editor is RemovedActorDummy removedActor)
+            {
+                node.TextColor = Color.OrangeRed;
+                node.Text = $"{removedActor.PrefabObject.Name} ({Utilities.Utils.GetPropertyNameUI(removedActor.PrefabObject.GetType().Name)})";
+            }
             // Actor or Script
             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 +269,12 @@ 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)
@@ -294,16 +300,40 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 // Not used
             }
         }
+        
+        private class RemovedActorDummy : CustomEditor
+        {
+            /// <summary>
+            /// The removed prefab object (from the prefab default instance).
+            /// </summary>
+            public Actor PrefabObject;
+
+            /// <summary>
+            /// The prefab instance's parent.
+            /// </summary>
+            public Actor ParentActor;
+
+            /// <summary>
+            /// The order of the removed actor in the parent.
+            /// </summary>
+            public int OrderInParent;
+
+            /// <inheritdoc />
+            public override void Initialize(LayoutElementsContainer layout)
+            {
+                // Not used
+            }
+        }
 
         private TreeNode ProcessDiff(CustomEditor editor, bool skipIfNotModified = true)
         {
-            // Special case for new Script added to actor
-            if (editor.Values[0] is Script script && !script.HasPrefabLink)
+            // Special case for new Script or child actor added to actor
+            if ((editor.Values[0] is Script script && !script.HasPrefabLink) || (editor.Values[0] is Actor a && !a.HasPrefabLink))
                 return CreateDiffNode(editor);
 
             // Skip if no change detected
             var isRefEdited = editor.Values.IsReferenceValueModified;
-            if (!isRefEdited && skipIfNotModified)
+            if (!isRefEdited && skipIfNotModified && editor is not ScriptsEditor)
                 return null;
 
             TreeNode result = null;
@@ -316,7 +346,7 @@ 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);
@@ -358,16 +388,80 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 }
             }
 
+            // Compare child actors for removed actors.
+            if (editor is ActorEditor && editor.Values.HasReferenceValue && editor.Values.ReferenceValue is Actor prefabObjectActor)
+            {
+                var thisActor = editor.Values[0] as Actor;
+                for (int i = 0; i < prefabObjectActor.ChildrenCount; i++)
+                {
+                    var prefabActorChild = prefabObjectActor.Children[i];
+                    if (thisActor == null)
+                        continue;
+                    bool isRemoved = true;
+                    for (int j = 0; j < thisActor.ChildrenCount; j++)
+                    {
+                        var actorChild = thisActor.Children[j];
+                        if (actorChild.PrefabObjectID == prefabActorChild.PrefabObjectID)
+                        {
+                            isRemoved = false;
+                            break;
+                        }
+                    }
+                    if (isRemoved)
+                    {
+                        var dummy = new RemovedActorDummy
+                        {
+                            PrefabObject = prefabActorChild,
+                            ParentActor = thisActor,
+                            OrderInParent = prefabActorChild.OrderInParent,
+                        };
+                        var child = CreateDiffNode(dummy);
+                        if (result == null)
+                            result = CreateDiffNode(editor);
+                        result.AddChild(child);
+                    }
+                }
+            }
+
+            if (editor is ScriptsEditor && result != null && result.ChildrenCount == 0)
+                return null;
+
             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");
@@ -411,6 +505,15 @@ namespace FlaxEditor.CustomEditors.Dedicated
             Presenter.BuildLayoutOnUpdate();
         }
 
+        private static void GetAllPrefabObjects(List<object> objects, Actor actor)
+        {
+            objects.Add(actor);
+            objects.AddRange(actor.Scripts);
+            var children = actor.Children;
+            foreach (var child in children)
+                GetAllPrefabObjects(objects, child);
+        }
+
         private void OnDiffRevert(CustomEditor editor)
         {
             // Special case for removed Script from actor
@@ -432,6 +535,22 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 return;
             }
 
+            // Special case for reverting removed Actors
+            if (editor is RemovedActorDummy removedActor)
+            {
+                Editor.Log("Reverting removed actor changes to prefab (adding it)");
+
+                var parentActor = removedActor.ParentActor;
+                var restored = parentActor.AddChild(removedActor.PrefabObject.GetType());
+                var prefabId = parentActor.PrefabID;
+                var prefabObjectId = removedActor.PrefabObject.PrefabObjectID;
+                string data = JsonSerializer.Serialize(removedActor.PrefabObject);
+                JsonSerializer.Deserialize(restored, data);
+                Presenter.Owner.SceneContext.Spawn(restored, parentActor, removedActor.OrderInParent);
+                Actor.Internal_LinkPrefab(FlaxEngine.Object.GetUnmanagedPtr(restored), ref prefabId, ref prefabObjectId);
+                return;
+            }
+
             // Special case for new Script added to actor
             if (editor.Values[0] is Script script && !script.HasPrefabLink)
             {
@@ -443,8 +562,37 @@ namespace FlaxEditor.CustomEditors.Dedicated
 
                 return;
             }
+            
+            // Special case for new Actor added to actor
+            if (editor.Values[0] is Actor a && !a.HasPrefabLink)
+            {
+                Editor.Log("Reverting added actor changes to prefab (removing it)");
 
-            editor.RevertToReferenceValue();
+                // TODO: Keep previous selection.
+                var context = Presenter.Owner.SceneContext;
+                context.Select(SceneGraph.SceneGraphFactory.FindNode(a.ID));
+                context.DeleteSelection();
+
+                return;
+            }
+
+            if (Presenter.Undo != null && Presenter.Undo.Enabled)
+            {
+                var thisActor = (Actor)Values[0];
+                var rootActor = thisActor.IsPrefabRoot ? thisActor : thisActor.GetPrefabRoot();
+                var prefabObjects = new List<object>();
+                GetAllPrefabObjects(prefabObjects, rootActor);
+                using (new UndoMultiBlock(Presenter.Undo, prefabObjects, "Revert to Prefab"))
+                {
+                    editor.RevertToReferenceValue();
+                    editor.RefreshInternal();
+                }
+            }
+            else
+            {
+                editor.RevertToReferenceValue();
+                editor.RefreshInternal();
+            }
         }
     }
 }

Source/Editor/CustomEditors/Dedicated/AudioSourceEditor.cs

@@ -13,6 +13,8 @@ namespace FlaxEditor.CustomEditors.Dedicated
     public class AudioSourceEditor : ActorEditor
     {
         private Label _infoLabel;
+        private Slider _slider;
+        private AudioSource.States _slideStartState;
 
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
@@ -28,7 +30,14 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 _infoLabel = playbackGroup.Label(string.Empty).Label;
                 _infoLabel.AutoHeight = true;
 
-                var grid = playbackGroup.CustomContainer<UniformGridPanel>();
+                // Play back slider
+                var sliderElement = playbackGroup.CustomContainer<Slider>();
+                _slider = sliderElement.CustomControl;
+                _slider.ThumbSize = new Float2(_slider.ThumbSize.X * 0.5f, _slider.ThumbSize.Y);
+                _slider.SlidingStart += OnSlidingStart;
+                _slider.SlidingEnd += OnSlidingEnd;
+
+                var grid = playbackGroup.UniformGrid();
                 var gridControl = grid.CustomControl;
                 gridControl.ClipChildren = false;
                 gridControl.Height = Button.DefaultHeight;
@@ -40,6 +49,38 @@ namespace FlaxEditor.CustomEditors.Dedicated
             }
         }
 
+        private void OnSlidingEnd()
+        {
+            foreach (var value in Values)
+            {
+                if (value is AudioSource audioSource && audioSource.Clip)
+                {
+                    switch (_slideStartState)
+                    {
+                    case AudioSource.States.Playing:
+                        audioSource.Play();
+                        break;
+                    case AudioSource.States.Paused:
+                    case AudioSource.States.Stopped:
+                        audioSource.Pause();
+                        break;
+                    default: break;
+                    }
+                }
+            }
+        }
+
+        private void OnSlidingStart()
+        {
+            foreach (var value in Values)
+            {
+                if (value is AudioSource audioSource && audioSource.Clip)
+                {
+                    _slideStartState = audioSource.State;
+                }
+            }
+        }
+
         /// <inheritdoc />
         public override void Refresh()
         {
@@ -51,7 +92,29 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 foreach (var value in Values)
                 {
                     if (value is AudioSource audioSource && audioSource.Clip)
+                    {
                         text += $"Time: {audioSource.Time:##0.0}s / {audioSource.Clip.Length:##0.0}s\n";
+                        _slider.Maximum = audioSource.Clip.Length;
+                        _slider.Minimum = 0;
+                        if (_slider.IsSliding)
+                        {
+                            if (audioSource.State != AudioSource.States.Playing)
+                            {
+                                // Play to move slider correctly
+                                audioSource.Play();
+                                audioSource.Time = _slider.Value;
+                            }
+                            else
+                            {
+                                audioSource.Time = _slider.Value;
+                            }
+                        }
+                        else
+                        {
+                            _slider.Value = audioSource.Time;
+                        }
+                        
+                    }
                 }
                 _infoLabel.Text = text;
             }

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/GPUTextureEditor.cs

@@ -0,0 +1,68 @@
+// Copyright (c) Wojciech Figat. All rights reserved.
+
+using FlaxEditor.GUI.ContextMenu;
+using FlaxEngine;
+using FlaxEngine.GUI;
+
+namespace FlaxEditor.CustomEditors.Dedicated
+{
+    /// <summary>
+    /// Basic editor/viewer for <see cref="GPUTexture"/>.
+    /// </summary>
+    [CustomEditor(typeof(GPUTexture)), DefaultEditor]
+    public class GPUTextureEditor : CustomEditor
+    {
+        private Image _image;
+
+        /// <inheritdoc />
+        public override DisplayStyle Style => DisplayStyle.Inline;
+
+        /// <inheritdoc />
+        public override void Initialize(LayoutElementsContainer layout)
+        {
+            _image = new Image
+            {
+                Brush = new GPUTextureBrush(),
+                Size = new Float2(200, 100),
+                Parent = layout.ContainerControl,
+            };
+            _image.Clicked += OnImageClicked;
+        }
+
+        private void OnImageClicked(Image image, MouseButton button)
+        {
+            var texture = Values[0] as GPUTexture;
+            if (!texture || button != MouseButton.Right)
+                return;
+            var menu = new ContextMenu();
+            menu.AddButton("Save...", () => Screenshot.Capture(Values[0] as GPUTexture));
+            menu.AddButton("Enlarge", () => _image.Size *= 2);
+            menu.AddButton("Shrink", () => _image.Size /= 2).Enabled = _image.Height > 32;
+            var location = image.PointFromScreen(Input.MouseScreenPosition);
+            menu.Show(image, location);
+        }
+
+        /// <inheritdoc />
+        public override void Refresh()
+        {
+            base.Refresh();
+
+            var texture = Values[0] as GPUTexture;
+            ((GPUTextureBrush)_image.Brush).Texture = texture;
+            if (texture)
+            {
+                var desc = texture.Description;
+#if BUILD_RELEASE
+                var name = string.Empty;
+#else
+                var name = texture.Name;
+#endif
+                _image.TooltipText = $"{name}\nType: {texture.ResourceType}\nSize: {desc.Width}x{desc.Height}\nFormat: {desc.Format}\nMemory: {Utilities.Utils.FormatBytesCount(texture.MemoryUsage)}";
+            }
+            else
+            {
+                _image.TooltipText = "None";
+            }
+        }
+    }
+}

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++
-                    files = Directory.GetFiles(Globals.ProjectSourceFolder, "*.cpp", SearchOption.AllDirectories);
+                    // C/C++
+                    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/ScriptsEditor.cs

@@ -36,6 +36,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
         {
             ScriptName = scriptName;
             TooltipText = "Create a new script";
+            DrawHighlights = false;
         }
     }
 
@@ -70,7 +71,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
             var buttonHeight = (textSize.Y < 18) ? 18 : textSize.Y + 4;
             _addScriptsButton = new Button
             {
-                TooltipText = "Add new scripts to the actor",
+                TooltipText = "Add new scripts to the actor.",
                 AnchorPreset = AnchorPresets.MiddleCenter,
                 Text = buttonText,
                 Parent = this,
@@ -114,7 +115,16 @@ namespace FlaxEditor.CustomEditors.Dedicated
             cm.TextChanged += text =>
             {
                 if (!IsValidScriptName(text))
+                {
+                    // Remove NewScriptItems
+                    List<Control> newScriptItems = cm.ItemsPanel.Children.FindAll(c => c is NewScriptItem);
+                    foreach (var item in newScriptItems)
+                    {
+                        cm.ItemsPanel.RemoveChild(item);
+                    }
+
                     return;
+                }
                 if (!cm.ItemsPanel.Children.Any(x => x.Visible && x is not NewScriptItem))
                 {
                     // If there are no visible items, that means the search failed so we can find the create script button or create one if it's the first time
@@ -876,7 +886,7 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 // Add drag button to the group
                 var scriptDrag = new DragImage
                 {
-                    TooltipText = "Script reference",
+                    TooltipText = "Script reference.",
                     AutoFocus = true,
                     IsScrollable = false,
                     Color = FlaxEngine.GUI.Style.Current.ForegroundGrey,

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

@@ -41,13 +41,9 @@ namespace FlaxEditor.CustomEditors.Editors
             public override void Initialize(LayoutElementsContainer layout)
             {
                 base.Initialize(layout);
-                
+
                 if (XElement.ValueBox.Parent is UniformGridPanel ug)
-                {
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
+                    CheckLayout(ug);
 
                 // 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)
-                {
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
+                    CheckLayout(ug);
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
@@ -114,7 +106,6 @@ namespace FlaxEditor.CustomEditors.Editors
 
                 _linkButton = new Button
                 {
-                    BackgroundBrush = new SpriteBrush(Editor.Instance.Icons.Link32),
                     Parent = LinkedLabel,
                     Width = 18,
                     Height = 18,
@@ -136,13 +127,9 @@ namespace FlaxEditor.CustomEditors.Editors
                             menu.AddButton("Link", ToggleLink).LinkTooltip("Links scale components for uniform scaling");
                     };
                 }
-                
+
                 if (XElement.ValueBox.Parent is UniformGridPanel ug)
-                {
-                    ug.Height += 2;
-                    ug.SlotSpacing = new Float2(4);
-                    ug.SlotPadding = new Margin(0, 0, 1, 1);
-                }
+                    CheckLayout(ug);
 
                 // Override colors
                 var back = FlaxEngine.GUI.Style.Current.TextBoxBackground;
@@ -201,7 +188,16 @@ namespace FlaxEditor.CustomEditors.Editors
                 _linkButton.SetColors(backgroundColor);
                 _linkButton.BorderColor = _linkButton.BorderColorSelected = _linkButton.BorderColorHighlighted = Color.Transparent;
                 _linkButton.TooltipText = LinkValues ? "Unlinks scale components from uniform scaling" : "Links scale components for uniform scaling";
+                _linkButton.BackgroundBrush = new SpriteBrush(LinkValues ? Editor.Instance.Icons.Link32 : Editor.Instance.Icons.BrokenLink32);
             }
         }
+
+        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

@@ -70,7 +70,9 @@ namespace FlaxEditor.CustomEditors.Editors
                 menu.ItemsContainer.RemoveChildren();
 
                 menu.AddButton("Copy", linkedEditor.Copy);
-                var b = menu.AddButton("Paste", linkedEditor.Paste);
+                var b = menu.AddButton("Duplicate", () => Editor.Duplicate(Index));
+                b.Enabled = linkedEditor.CanPaste && !Editor._readOnly && Editor._canResize;
+                b = menu.AddButton("Paste", linkedEditor.Paste);
                 b.Enabled = linkedEditor.CanPaste && !Editor._readOnly;
 
                 menu.AddSeparator();
@@ -404,8 +406,10 @@ namespace FlaxEditor.CustomEditors.Editors
                 var menu = new ContextMenu();
 
                 menu.AddButton("Copy", linkedEditor.Copy);
+                var b = menu.AddButton("Duplicate", () => Editor.Duplicate(Index));
+                b.Enabled = linkedEditor.CanPaste && !Editor._readOnly && Editor._canResize;
                 var paste = menu.AddButton("Paste", linkedEditor.Paste);
-                paste.Enabled = linkedEditor.CanPaste;
+                paste.Enabled = linkedEditor.CanPaste && !Editor._readOnly;
 
                 if (_canReorder)
                 {
@@ -418,7 +422,8 @@ namespace FlaxEditor.CustomEditors.Editors
                     moveDownButton.Enabled = Index + 1 < Editor.Count;
                 }
 
-                menu.AddButton("Remove", OnRemoveClicked);
+                b = menu.AddButton("Remove", OnRemoveClicked);
+                b.Enabled = !Editor._readOnly && Editor._canResize;
 
                 menu.Show(panel, location);
             }
@@ -642,10 +647,10 @@ namespace FlaxEditor.CustomEditors.Editors
             if (_canResize && !_readOnly)
             {
                 var panel = dragArea.HorizontalPanel();
-                panel.Panel.Size = new Float2(0, 20);
-                panel.Panel.Margin = new Margin(2);
+                panel.Panel.Size = new Float2(0, 18);
+                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 +661,7 @@ 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;
@@ -741,6 +746,34 @@ namespace FlaxEditor.CustomEditors.Editors
             cloned[srcIndex] = tmp;
             SetValue(cloned);
         }
+        
+        /// <summary>
+        /// Duplicates the list item.
+        /// </summary>
+        /// <param name="index">The index to duplicate.</param>
+        public void Duplicate(int index)
+        {
+            if (IsSetBlocked)
+                return;
+
+            var count = Count;
+            var newValues = Allocate(count + 1);
+            var oldValues = (IList)Values[0];
+   
+            for (int i = 0; i <= index; i++)
+            {
+                newValues[i] = oldValues[i];
+            }
+
+            newValues[index + 1] = Utilities.Utils.CloneValue(oldValues[index]);
+
+            for (int i = index + 1; i < count; i++)
+            {
+                newValues[i + 1] = oldValues[i];
+            }
+
+            SetValue(newValues);
+        }
 
         /// <summary>
         /// Shifts the specified item at the given index and moves it through the list to the other item. It supports undo.

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 (settings?.LocalizedStringTables == null || settings.LocalizedStringTables.Length == 0)
-            {
-                MessageBox.Show("No valid localization settings setup.");
+            if (GetSettings(out var settings))
                 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/ObjectSwitcherEditor.cs

@@ -3,6 +3,7 @@
 using System;
 using FlaxEditor.GUI;
 using FlaxEditor.Scripting;
+using FlaxEngine;
 using FlaxEngine.Utilities;
 
 namespace FlaxEditor.CustomEditors.Editors
@@ -81,9 +82,13 @@ namespace FlaxEditor.CustomEditors.Editors
 
         private OptionType[] _options;
         private ScriptType _type;
+        private Elements.PropertiesListElement _typeItem;
 
         private ScriptType Type => Values[0] == null ? Values.Type : TypeUtils.GetObjectType(Values[0]);
 
+        /// <inheritdoc />
+        public override bool RevertValueWithChildren => false; // Always revert value for a whole object
+
         /// <inheritdoc />
         public override void Initialize(LayoutElementsContainer layout)
         {
@@ -98,7 +103,8 @@ namespace FlaxEditor.CustomEditors.Editors
             _type = type;
 
             // Type
-            var typeEditor = layout.ComboBox(TypeComboBoxName, "Type of the object value. Use it to change the object.");
+            _typeItem = layout.AddPropertyItem(TypeComboBoxName, "Type of the object value. Use it to change the object.");
+            var typeEditor = _typeItem.ComboBox();
             for (int i = 0; i < _options.Length; i++)
             {
                 typeEditor.ComboBox.AddItem(_options[i].Name);
@@ -126,6 +132,8 @@ namespace FlaxEditor.CustomEditors.Editors
 
             // Value
             var values = new CustomValueContainer(type, (instance, index) => instance);
+            if (Values.HasReferenceValue)
+                values.SetReferenceValue(Values.ReferenceValue);
             values.AddRange(Values);
             var editor = CustomEditorsUtil.CreateEditor(type);
             var style = editor.Style;
@@ -170,6 +178,12 @@ namespace FlaxEditor.CustomEditors.Editors
         {
             base.Refresh();
 
+            // Show prefab diff when reference value type is different
+            var color = Color.Transparent;
+            if (Values.HasReferenceValue && CanRevertReferenceValue && Values[0]?.GetType() != Values.ReferenceValue?.GetType())
+                color = FlaxEngine.GUI.Style.Current.BackgroundSelected;
+            _typeItem.Labels[0].HighlightStripColor = color;
+
             // Check if type has been modified outside the editor (eg. from code)
             if (Type != _type)
             {

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

@@ -14,24 +14,21 @@ namespace FlaxEditor.CustomEditors.GUI
     public class PropertiesList : PanelWithMargins
     {
         // TODO: sync splitter for whole presenter
+       
+        private const float SplitterPadding = 15;
+        private const float EditorsMinWidthRatio = 0.4f;
 
         /// <summary>
         /// The splitter size (in pixels).
         /// </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;
         private bool _splitterClicked, _mouseOverSplitter;
         private bool _cursorChanged;
+        private bool _hasCustomSplitterValue;
 
         /// <summary>
         /// Gets or sets the splitter value (always in range [0; 1]).
@@ -65,16 +62,38 @@ 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 AutoSizeSplitter()
+        {
+            if (_hasCustomSplitterValue || !Editor.Instance.Options.Options.Interface.AutoSizePropertiesPanelSplitter)
+                return;
+
+            Font font = Style.Current.FontMedium;
+
+            float largestWidth = 0f;
+            for (int i = 0; i < _element.Labels.Count; i++)
+            {
+                Label currentLabel = _element.Labels[i];
+                Float2 dimensions = font.MeasureText(currentLabel.Text);
+                float width = dimensions.X + currentLabel.Margin.Left + SplitterPadding;
+
+                largestWidth = Mathf.Max(largestWidth, width);
+            }
+
+            SplitterValue = Mathf.Clamp(largestWidth / Width, 0, 1 - EditorsMinWidthRatio);
+        }
+
         private void UpdateSplitRect()
         {
-            _splitterRect = new Rectangle(Mathf.Clamp(_splitterValue * Width - SplitterSizeHalf, 0.0f, Width), 0, SplitterSize, Height);
-            LeftMargin = _splitterValue * Width + SplitterMargin;
+            _splitterRect = new Rectangle(Mathf.Clamp(_splitterValue * Width - SplitterSize * 0.5f, 0.0f, Width), 0, SplitterSize, Height);
+            LeftMargin = _splitterValue * Width + _spacing;
         }
 
         private void StartTracking()
@@ -127,6 +146,7 @@ namespace FlaxEditor.CustomEditors.GUI
                 SplitterValue = location.X / Width;
                 Cursor = CursorType.SizeWE;
                 _cursorChanged = true;
+                _hasCustomSplitterValue = true;
             }
             else if (_mouseOverSplitter)
             {
@@ -200,6 +220,7 @@ namespace FlaxEditor.CustomEditors.GUI
             // Refresh
             UpdateSplitRect();
             PerformLayout(true);
+            AutoSizeSplitter();
         }
 
         /// <inheritdoc />
@@ -222,23 +243,33 @@ 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;
-                    c.Bounds = new Rectangle(_margin.Left, y + _spacing, w, h);
+                    var rect = new Rectangle(_margin.Left, y, w, c.Height);
+                    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 +302,9 @@ 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();
-            element.Image.Brush = new SpriteBrush(sprite);
-            OnAddElement(element);
-            return element;
+            return Image(new SpriteBrush(sprite));
         }
 
         /// <summary>
@@ -289,10 +297,7 @@ namespace FlaxEditor.CustomEditors
         /// <returns>The created element.</returns>
         public ImageElement Image(Texture texture)
         {
-            var element = new ImageElement();
-            element.Image.Brush = new TextureBrush(texture);
-            OnAddElement(element);
-            return element;
+            return Image(new TextureBrush(texture));
         }
 
         /// <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.cs

@@ -51,6 +51,7 @@ namespace FlaxEditor
         private readonly List<EditorModule> _modules = new List<EditorModule>(16);
         private bool _isAfterInit, _areModulesInited, _areModulesAfterInitEnd, _isHeadlessMode, _autoExit;
         private string _projectToOpen;
+        private bool _projectIsNew;
         private float _lastAutoSaveTimer, _autoExitTimeout = 0.1f;
         private Button _saveNowButton;
         private Button _cancelSaveButton;
@@ -528,7 +529,11 @@ namespace FlaxEditor
                 var timeSinceLastSave = Time.UnscaledGameTime - _lastAutoSaveTimer;
                 var timeToNextSave = options.AutoSaveFrequency * 60.0f - timeSinceLastSave;
 
-                if (timeToNextSave <= 0.0f || _autoSaveNow)
+                if (timeToNextSave <= 0.0f && GetWindows().Any(x => x.GUI.Children.Any(c => c is GUI.ContextMenu.ContextMenuBase)))
+                {
+                    // Skip aut-save if any context menu is opened to wait for user to end interaction
+                }
+                else if (timeToNextSave <= 0.0f || _autoSaveNow)
                 {
                     Log("Auto save");
                     _lastAutoSaveTimer = Time.UnscaledGameTime;
@@ -670,6 +675,8 @@ 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()
@@ -731,11 +738,12 @@ namespace FlaxEditor
                 var procSettings = new CreateProcessSettings
                 {
                     FileName = Platform.ExecutableFilePath,
-                    Arguments = string.Format("-project \"{0}\"", _projectToOpen),
+                    Arguments = string.Format("-project \"{0}\"" + (_projectIsNew ? " -new" : string.Empty), _projectToOpen),
                     ShellExecute = true,
                     WaitForEnd = false,
                     HiddenWindow = false,
                 };
+                _projectIsNew = false;
                 _projectToOpen = null;
                 Platform.CreateProcess(ref procSettings);
             }
@@ -784,6 +792,24 @@ namespace FlaxEditor
             }
         }
 
+        /// <summary>
+        /// Creates the given project. Afterwards closes this project with running editor and opens the given project.
+        /// </summary>
+        /// <param name="projectFilePath">The project file path.</param>
+        public void NewProject(string projectFilePath)
+        {
+            if (projectFilePath == null)
+            {
+                MessageBox.Show("Missing project");
+                return;
+            }
+
+            // Cache project path and start editor exit (it will open new instance on valid closing)
+            _projectToOpen = StringUtils.NormalizePath(Path.GetDirectoryName(projectFilePath));
+            _projectIsNew = true;
+            Windows.MainWindow.Close(ClosingReason.User);
+        }
+
         /// <summary>
         /// Closes this project with running editor and opens the given project.
         /// </summary>
@@ -1031,6 +1057,8 @@ 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/EditorIcons.cs

@@ -39,6 +39,7 @@ namespace FlaxEditor
         public SpriteHandle Globe32;
         public SpriteHandle CamSpeed32;
         public SpriteHandle Link32;
+        public SpriteHandle BrokenLink32;
         public SpriteHandle Add32;
         public SpriteHandle Left32;
         public SpriteHandle Right32;
@@ -94,6 +95,7 @@ namespace FlaxEditor
         public SpriteHandle Search64;
         public SpriteHandle Bone64;
         public SpriteHandle Link64;
+        public SpriteHandle BrokenLink64;
         public SpriteHandle Build64;
         public SpriteHandle Add64;
         public SpriteHandle ShipIt64;

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/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);
@@ -265,6 +270,12 @@ namespace FlaxEditor.GUI.ContextMenu
                     _window.GotFocus += OnWindowGotFocus;
                     _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;
@@ -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;
-                }
-            }
-        }
-    }
-}