From 226ab14576b4504e2edb156b72820e9e2d47d81d Mon Sep 17 00:00:00 2001
From: William Emfinger <waemfinger@gmail.com>
Date: Fri, 10 Jun 2022 07:53:47 -0500
Subject: [PATCH] WIP #31 added HUD class for menu and updated
 WotGameplayStatics to wrap showing/hiding the main menu

---
 unreal/Source/VoxelRPG/Private/UI/WotHUD.cpp  | 19 ++++++++++++
 .../VoxelRPG/Private/WotGameplayStatics.cpp   | 16 ++++++++++
 unreal/Source/VoxelRPG/Public/UI/WotHUD.h     | 29 +++++++++++++++++++
 .../VoxelRPG/Public/WotGameplayStatics.h      |  7 +++++
 4 files changed, 71 insertions(+)
 create mode 100644 unreal/Source/VoxelRPG/Private/UI/WotHUD.cpp
 create mode 100644 unreal/Source/VoxelRPG/Public/UI/WotHUD.h

diff --git a/unreal/Source/VoxelRPG/Private/UI/WotHUD.cpp b/unreal/Source/VoxelRPG/Private/UI/WotHUD.cpp
new file mode 100644
index 00000000..639f166b
--- /dev/null
+++ b/unreal/Source/VoxelRPG/Private/UI/WotHUD.cpp
@@ -0,0 +1,19 @@
+#include "UI/WotHUD.h"
+#include "UI/WotUserWidget.h"
+#include <GameFramework/PlayerController.h>
+
+void AWotHUD::ShowMainMenu()
+{
+  APlayerController* PC = Cast<APlayerController>(GetOwner());
+  MainMenu = CreateWidget<UWotUserWidget>(PC, MainMenuClass);
+
+  MainMenu->AddToViewport();
+}
+
+void AWotHUD::HideMainMenu()
+{
+  if (MainMenu) {
+    MainMenu->RemoveFromViewport();
+    MainMenu = nullptr;
+  }
+}
diff --git a/unreal/Source/VoxelRPG/Private/WotGameplayStatics.cpp b/unreal/Source/VoxelRPG/Private/WotGameplayStatics.cpp
index 0eb876e5..bed69be5 100644
--- a/unreal/Source/VoxelRPG/Private/WotGameplayStatics.cpp
+++ b/unreal/Source/VoxelRPG/Private/WotGameplayStatics.cpp
@@ -1,5 +1,21 @@
 #include "WotGameplayStatics.h"
 #include "Engine/UserInterfaceSettings.h"
+#include <Kismet/GameplayStatics.h>
+#include "UI/WotHUD.h"
+
+void UWotGameplayStatics::ShowMainMenu(const UObject* WorldContextObject, const int PlayerIndex)
+{
+  APlayerController* PC = UGameplayStatics::GetPlayerController(WorldContextObject, PlayerIndex);
+  AWotHUD* HUD = PC->GetHUD<AWotHUD>();
+  HUD->ShowMainMenu();
+}
+
+void UWotGameplayStatics::HideMainMenu(const UObject* WorldContextObject, const int PlayerIndex)
+{
+  APlayerController* PC = UGameplayStatics::GetPlayerController(WorldContextObject, PlayerIndex);
+  AWotHUD* HUD = PC->GetHUD<AWotHUD>();
+  HUD->HideMainMenu();
+}
 
 void UWotGameplayStatics::SetUIScale( float CustomUIScale )
 {
diff --git a/unreal/Source/VoxelRPG/Public/UI/WotHUD.h b/unreal/Source/VoxelRPG/Public/UI/WotHUD.h
new file mode 100644
index 00000000..1b71233a
--- /dev/null
+++ b/unreal/Source/VoxelRPG/Public/UI/WotHUD.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/HUD.h"
+#include "WotHUD.generated.h"
+
+class UWotUserWidget;
+
+UCLASS()
+class VOXELRPG_API AWotHUD : public AHUD
+{
+  GENERATED_BODY()
+
+public:
+
+  UFUNCTION(BlueprintCallable)
+  void ShowMainMenu();
+
+  UFUNCTION(BlueprintCallable)
+  void HideMainMenu();
+
+protected:
+
+  UPROPERTY(EditDefaultsOnly)
+  TSubclassOf<UWotUserWidget> MainMenuClass;
+
+  UPROPERTY()
+  UWotUserWidget* MainMenu;
+};
diff --git a/unreal/Source/VoxelRPG/Public/WotGameplayStatics.h b/unreal/Source/VoxelRPG/Public/WotGameplayStatics.h
index 62a41f81..69ec80a4 100644
--- a/unreal/Source/VoxelRPG/Public/WotGameplayStatics.h
+++ b/unreal/Source/VoxelRPG/Public/WotGameplayStatics.h
@@ -10,6 +10,13 @@ class UWotGameplayStatics : public UBlueprintFunctionLibrary
 	GENERATED_BODY()
 
 public:
+
+	UFUNCTION( BlueprintCallable, Category = "User Interface" )
+	static void ShowMainMenu(const UObject* WorldContextObject, const int PlayerIndex=0);
+
+	UFUNCTION( BlueprintCallable, Category = "User Interface" )
+	static void HideMainMenu(const UObject* WorldContextObject, const int PlayerIndex=0);
+
 	// Custom UI scale 1.0f == 100%, 2.0f == 200%, 0.5f == 50% etc.
 	UFUNCTION( BlueprintCallable, Category = "User Interface" )
 	static void SetUIScale( float CustomUIScale );