update UI effect on the sample

Plugins/CogWindow/Source/CogWindow/Private/CogWindow.cpp

@@ -80,6 +80,8 @@ void UCogWindow::Render(float DeltaTime)
         RenderContent();
         ImGui::End();
     }
+
+    PostRender();
 }
 
 //--------------------------------------------------------------------------------------------------------------------------

Plugins/CogWindow/Source/CogWindow/Private/CogWindowManager.cpp

@@ -3,6 +3,7 @@
 #include "CogImguiModule.h"
 #include "CogImguiWidget.h"
 #include "CogWindowWidgets.h"
+#include "CogWindow_Spacing.h"
 #include "Engine/Engine.h"
 #include "imgui_internal.h"
 
@@ -27,6 +28,11 @@ void UCogWindowManager::Initialize(UWorld* InWorld, TSharedPtr<SCogImguiWidget>
     IniHandler.WriteAllFn = UCogWindowManager::SettingsHandler_WriteAll;
     IniHandler.UserData = this;
     ImGui::AddSettingsHandler(&IniHandler);
+
+    SpaceWindows.Add(CreateWindow<UCogWindow_Spacing>("Space 1", false));
+    SpaceWindows.Add(CreateWindow<UCogWindow_Spacing>("Space 2", false));
+    SpaceWindows.Add(CreateWindow<UCogWindow_Spacing>("Space 3", false));
+    SpaceWindows.Add(CreateWindow<UCogWindow_Spacing>("Space 4", false));
 }
 
 //--------------------------------------------------------------------------------------------------------------------------
@@ -66,7 +72,9 @@ void UCogWindowManager::Tick(float DeltaTime)
 //--------------------------------------------------------------------------------------------------------------------------
 void UCogWindowManager::Render(float DeltaTime)
 {
-    ImGui::DockSpaceOverViewport(0, ImGuiDockNodeFlags_PassthruCentralNode | ImGuiDockNodeFlags_NoDockingInCentralNode);
+    ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(0, 0, 0, 0));
+    ImGui::DockSpaceOverViewport(0, ImGuiDockNodeFlags_PassthruCentralNode | ImGuiDockNodeFlags_NoDockingInCentralNode | ImGuiDockNodeFlags_AutoHideTabBar);
+    ImGui::PopStyleColor(1);
 
     bool bCompactSaved = bCompactMode;
     if (bCompactSaved)
@@ -92,6 +100,8 @@ void UCogWindowManager::Render(float DeltaTime)
             {
                 ImGui::SetNextWindowBgAlpha(0.35f);
             }
+
+            ImGui::DockSpaceOverViewport(0, ImGuiDockNodeFlags_PassthruCentralNode | ImGuiDockNodeFlags_NoDockingInCentralNode | ImGuiDockNodeFlags_AutoHideTabBar);
             Window->Render(DeltaTime);
         }
     }
@@ -277,6 +287,21 @@ void UCogWindowManager::DrawMainMenu()
 
             ImGui::Separator();
 
+            if (ImGui::BeginMenu("Spacing"))
+            {
+                for (UCogWindow* SpaceWindow : SpaceWindows)
+                {
+                    bool bSpaceVisible = SpaceWindow->GetIsVisible();
+                    if (ImGui::MenuItem(TCHAR_TO_ANSI(*SpaceWindow->GetName()), nullptr, &bSpaceVisible))
+                    {
+                        SpaceWindow->SetIsVisible(bSpaceVisible);
+                    }
+                }
+                ImGui::EndMenu();
+            }
+
+            ImGui::Separator();
+
             ImGui::MenuItem("Compact Mode", nullptr, &bCompactMode);
 
             ImGui::Text("DPI Scale");

Plugins/CogWindow/Source/CogWindow/Private/CogWindow_Spacing.cpp

@@ -0,0 +1,13 @@
+#include "CogWindow_Spacing.h"
+
+//--------------------------------------------------------------------------------------------------------------------------
+void UCogWindow_Spacing::PreRender(ImGuiWindowFlags& WindowFlags)
+{
+    ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(0, 0, 0, 0));
+}
+
+//--------------------------------------------------------------------------------------------------------------------------
+void UCogWindow_Spacing::PostRender()
+{
+    ImGui::PopStyleColor(1);
+}

Plugins/CogWindow/Source/CogWindow/Public/CogWindow.h

@@ -63,6 +63,8 @@ protected:
 
     virtual void PreRender(ImGuiWindowFlags& WindowFlags) {}
 
+    virtual void PostRender() {}
+
     virtual void RenderContent() {}
 
     virtual bool CheckEditorVisibility();

Plugins/CogWindow/Source/CogWindow/Public/CogWindowManager.h

@@ -89,6 +89,9 @@ private:
     UPROPERTY()
     TArray<UCogWindow*> Windows;
 
+    UPROPERTY()
+    TArray<UCogWindow*> SpaceWindows;
+
     UPROPERTY()
     TArray<UCogWindow*> MainMenuWidgets;
 

Plugins/CogWindow/Source/CogWindow/Public/CogWindow_Spacing.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "CogWindow.h"
+#include "CogWindow_Spacing.generated.h"
+
+UCLASS()
+class COGWINDOW_API UCogWindow_Spacing : public UCogWindow
+{
+    GENERATED_BODY()
+
+public:
+    
+protected: 
+
+    virtual void PreRender(ImGuiWindowFlags& WindowFlags) override;
+    
+    virtual void PostRender() override;
+
+private:
+    
+};