Fix a bug that cause the crash when exiting editor.

.gitignore

@@ -0,0 +1,80 @@
+# Visual Studio 2015 user specific files
+.vs/
+
+# Visual Studio 2015 database file
+*.VC.db
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+*.ipa
+
+# These project files can be generated by the engine
+*.xcodeproj
+*.xcworkspace
+*.sln
+*.suo
+*.opensdf
+*.sdf
+*.VC.db
+*.VC.opendb
+
+# Precompiled Assets
+SourceArt/**/*.png
+SourceArt/**/*.tga
+
+# Binary Files
+Binaries/*
+Plugins/*/Binaries/*
+
+# Builds
+Build/*
+
+# Whitelist PakBlacklist-<BuildConfiguration>.txt files
+!Build/*/
+Build/*/**
+!Build/*/PakBlacklist*.txt
+
+# Don't ignore icon files in Build
+!Build/**/*.ico
+
+# Built data for maps
+*_BuiltData.uasset
+
+# Configuration files generated by the Editor
+Saved/*
+
+# Compiled source files for the engine to use
+Intermediate/*
+Plugins/*/Intermediate/*
+
+# Cache files for the editor to use
+DerivedDataCache/*
+
+# Content shouldn't be included
+Content

Source/UE4EditorCustomize/Private/UE4EditorCustomize.cpp

@@ -639,9 +639,42 @@ FString FUE4EditorCustomizeModule::Uint8ToExtension(uint8 Extension)
 	}
 }
 
+void FUE4EditorCustomizeModule::CacheOriginalBrushes()
+{
+	FSlateStyleSet* EditorStyles = (FSlateStyleSet*)&FEditorStyle::Get();
+	const FName BrushesName[]=
+	{
+		"Graph.Panel.SolidBackground", 
+		"ToolPanel.GroupBorder", 
+		"ToolPanel.DarkGroupBorder", 
+		"SCSEditor.TreePanel", 
+		"SettingsEditor.CheckoutWarningBorder", 
+		"DetailsView.CategoryTop_Hovered", 
+		"DetailsView.CategoryTop", 
+		"DetailsView.CategoryMiddle_Hovered",
+		"DetailsView.CategoryMiddle",
+		"DetailsView.CategoryMiddle_Highlighted",
+		"DetailsView.CollapsedCategory_Hovered",
+		"DetailsView.CollapsedCategory", 
+		"DetailsView.CategoryBottom",
+		"DetailsView.AdvancedDropdownBorder",
+		"Toolbar.Background"
+	};
+	for (const FName& CurName : BrushesName)
+	{
+		const FSlateBrush* tmpCachedBrush = EditorStyles->GetBrush(CurName);
+		CachedOriginalBrushes.FindOrAdd(CurName) = tmpCachedBrush;
+	}
+}
+
 void FUE4EditorCustomizeModule::StartupModule()
 {
 	// This code will execute after your module is loaded into memory; the exact timing is specified in the .uplugin file per-module
+
+	//Cache Original Brushes first.
+	//Prepare for ShutdownModule()
+	CacheOriginalBrushes();
+
 	UEditorCustomizeSetting* StyleSettings = GetMutableDefault<UEditorCustomizeSetting>();
 	GetMutableDefault<UEditorStyleSettings>()->bUseGrid = StyleSettings->EditorUseGrid;
 	ApplyCoreStyle(StyleSettings);
@@ -667,8 +700,10 @@ void FUE4EditorCustomizeModule::StartupModule()
 
 void FUE4EditorCustomizeModule::ShutdownModule()
 {
-	FEditorStyle::ResetToDefault();
-	FCoreStyle::ResetToDefault();
+	//Restore Cached Brush
+	//Editor will delete all editor brushes when exit.
+	//So if the brushes didn't restore, It will cause Editor Crash.
+	RestoreCachedBrush();
 	FModuleManager::LoadModuleChecked<ISettingsModule>("Settings").UnregisterSettings("Project", "Plugins", "UE4EditorCustomize");
 }
 
@@ -1029,10 +1064,13 @@ void FUE4EditorCustomizeModule::ResetTextStyle()
 	GConfig->Flush(false);
 }
 
-void FUE4EditorCustomizeModule::ResetAllImmediately()
+void FUE4EditorCustomizeModule::RestoreCachedBrush()
 {
-	FEditorStyle::ResetToDefault();
-	FCoreStyle::ResetToDefault();
+	FSlateStyleSet* EditorStyles = (FSlateStyleSet*)&FEditorStyle::Get();
+	for (auto it=CachedOriginalBrushes.CreateConstIterator();it;++it)
+	{
+		EditorStyles->Set(it->Key, (FSlateBrush*)it->Value);
+	}
 }
 
 #undef LOCTEXT_NAMESPACE

Source/UE4EditorCustomize/Public/UE4EditorCustomize.h

@@ -31,6 +31,7 @@ class FUE4EditorCustomizeModule : public IModuleInterface
 	};
 
 	TSharedPtr<ISettingsSection> SettingS;
+	TMap<FName, const FSlateBrush*> CachedOriginalBrushes;
 	TArray<UObject*> FindReferencedAsset();
 	FString GetAssetAbsolutePath(FString PackageName);
 	bool _Internal_ImportUTheme_v0(TArray<uint8>& FileData, FText* ErrorMsg=nullptr);
@@ -48,6 +49,7 @@ class FUE4EditorCustomizeModule : public IModuleInterface
 	bool _Internal_AskUThemeInfo(FUThemeInfo_v0* OutInfo);
 	uint8 ExtensionToUint8(FString FileExtension);
 	FString Uint8ToExtension(uint8 Extension);
+	void CacheOriginalBrushes();
 public:
 	/** IModuleInterface implementation */
 	virtual void StartupModule() override;
@@ -65,5 +67,5 @@ class FUE4EditorCustomizeModule : public IModuleInterface
 	void ResetEditorStyle();
 	void ResetCoreStyle();
 	void ResetTextStyle();
-	void ResetAllImmediately();
+	void RestoreCachedBrush();
 };

UE4EditorCustomize.uplugin

@@ -1,7 +1,7 @@
 {
 	"FileVersion": 3,
-	"Version": 6,
-	"VersionName": "1.3",
+	"Version": 7,
+	"VersionName": "1.31",
 	"FriendlyName": "UE4Editor Customize",
 	"Description": "Change UE4Editor To a New Style.",
 	"Category": "Editor",
@@ -11,7 +11,7 @@
 	"MarketplaceURL": "com.epicgames.launcher://ue/marketplace/content/0d22d9af59624886a6fccd9573fefa90",
 	"SupportURL": "https://github.com/Jack-Myth/UE4EditorCustomize/issues",
 	"CanContainContent": true,
-	"IsBetaVersion": true,
+	"IsBetaVersion": false,
 	"Installed": false,
 	"Modules": [
 		{