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| #include "GameUIPolicy.h"
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| #include "Engine/GameInstance.h"
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| #include "Framework/Application/SlateApplication.h"
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| #include "GameUIManagerSubsystem.h"
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| #include "CommonLocalPlayer.h"
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| #include "PrimaryGameLayout.h"
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| #include "Engine/Engine.h"
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| #include "LogCommonGame.h"
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| #include UE_INLINE_GENERATED_CPP_BY_NAME(GameUIPolicy)
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| UGameUIPolicy* UGameUIPolicy::GetGameUIPolicy(const UObject* WorldContextObject)
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| {
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| if (UWorld* World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull))
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| {
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| if (UGameInstance* GameInstance = World->GetGameInstance())
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| {
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| if (UGameUIManagerSubsystem* UIManager = UGameInstance::GetSubsystem<UGameUIManagerSubsystem>(GameInstance))
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| {
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| return UIManager->GetCurrentUIPolicy();
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| }
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| }
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| }
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| return nullptr;
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| }
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| UGameUIManagerSubsystem* UGameUIPolicy::GetOwningUIManager() const
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| {
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| return CastChecked<UGameUIManagerSubsystem>(GetOuter());
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| }
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| UWorld* UGameUIPolicy::GetWorld() const
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| {
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| return GetOwningUIManager()->GetGameInstance()->GetWorld();
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| }
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| UPrimaryGameLayout* UGameUIPolicy::GetRootLayout(const UCommonLocalPlayer* LocalPlayer) const
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| {
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| const FRootViewportLayoutInfo* LayoutInfo = RootViewportLayouts.FindByKey(LocalPlayer);
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| return LayoutInfo ? LayoutInfo->RootLayout : nullptr;
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| }
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| void UGameUIPolicy::NotifyPlayerAdded(UCommonLocalPlayer* LocalPlayer)
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| {
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| LocalPlayer->OnPlayerControllerSet.AddWeakLambda(this, [this](UCommonLocalPlayer* LocalPlayer, APlayerController* PlayerController)
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| {
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| NotifyPlayerRemoved(LocalPlayer);
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| if (FRootViewportLayoutInfo* LayoutInfo = RootViewportLayouts.FindByKey(LocalPlayer))
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| {
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| AddLayoutToViewport(LocalPlayer, LayoutInfo->RootLayout);
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| LayoutInfo->bAddedToViewport = true;
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| }
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| else
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| {
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| CreateLayoutWidget(LocalPlayer);
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| }
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| });
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| if (FRootViewportLayoutInfo* LayoutInfo = RootViewportLayouts.FindByKey(LocalPlayer))
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| {
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| AddLayoutToViewport(LocalPlayer, LayoutInfo->RootLayout);
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| LayoutInfo->bAddedToViewport = true;
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| }
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| else
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| {
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| CreateLayoutWidget(LocalPlayer);
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| }
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| }
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| void UGameUIPolicy::NotifyPlayerRemoved(UCommonLocalPlayer* LocalPlayer)
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| {
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| if (FRootViewportLayoutInfo* LayoutInfo = RootViewportLayouts.FindByKey(LocalPlayer))
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| {
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| RemoveLayoutFromViewport(LocalPlayer, LayoutInfo->RootLayout);
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| LayoutInfo->bAddedToViewport = false;
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| if (LocalMultiplayerInteractionMode == ELocalMultiplayerInteractionMode::SingleToggle && !LocalPlayer->IsPrimaryPlayer())
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| {
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| UPrimaryGameLayout* RootLayout = LayoutInfo->RootLayout;
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| if (RootLayout && !RootLayout->IsDormant())
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| {
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| RootLayout->SetIsDormant(true);
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| for (const FRootViewportLayoutInfo& RootLayoutInfo : RootViewportLayouts)
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| {
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| if (RootLayoutInfo.LocalPlayer->IsPrimaryPlayer())
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| {
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| if (UPrimaryGameLayout* PrimaryRootLayout = RootLayoutInfo.RootLayout)
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| {
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| PrimaryRootLayout->SetIsDormant(false);
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| }
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| }
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| }
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| }
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| }
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| }
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| }
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| void UGameUIPolicy::NotifyPlayerDestroyed(UCommonLocalPlayer* LocalPlayer)
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| {
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| NotifyPlayerRemoved(LocalPlayer);
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| LocalPlayer->OnPlayerControllerSet.RemoveAll(this);
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| const int32 LayoutInfoIdx = RootViewportLayouts.IndexOfByKey(LocalPlayer);
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| if (LayoutInfoIdx != INDEX_NONE)
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| {
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| UPrimaryGameLayout* Layout = RootViewportLayouts[LayoutInfoIdx].RootLayout;
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| RootViewportLayouts.RemoveAt(LayoutInfoIdx);
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| RemoveLayoutFromViewport(LocalPlayer, Layout);
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| OnRootLayoutReleased(LocalPlayer, Layout);
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| }
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| }
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| void UGameUIPolicy::AddLayoutToViewport(UCommonLocalPlayer* LocalPlayer, UPrimaryGameLayout* Layout)
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| {
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| UE_LOG(LogCommonGame, Log, TEXT("[%s] is adding player [%s]'s root layout [%s] to the viewport"), *GetName(), *GetNameSafe(LocalPlayer), *GetNameSafe(Layout));
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| Layout->SetPlayerContext(FLocalPlayerContext(LocalPlayer));
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| Layout->AddToPlayerScreen(1000);
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| OnRootLayoutAddedToViewport(LocalPlayer, Layout);
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| }
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| void UGameUIPolicy::RemoveLayoutFromViewport(UCommonLocalPlayer* LocalPlayer, UPrimaryGameLayout* Layout)
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| {
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| TWeakPtr<SWidget> LayoutSlateWidget = Layout->GetCachedWidget();
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| if (LayoutSlateWidget.IsValid())
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| {
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| UE_LOG(LogCommonGame, Log, TEXT("[%s] is removing player [%s]'s root layout [%s] from the viewport"), *GetName(), *GetNameSafe(LocalPlayer), *GetNameSafe(Layout));
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| Layout->RemoveFromParent();
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| if (LayoutSlateWidget.IsValid())
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| {
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| UE_LOG(LogCommonGame, Log, TEXT("Player [%s]'s root layout [%s] has been removed from the viewport, but other references to its underlying Slate widget still exist. Noting in case we leak it."), *GetNameSafe(LocalPlayer), *GetNameSafe(Layout));
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| }
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| OnRootLayoutRemovedFromViewport(LocalPlayer, Layout);
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| }
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| }
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| void UGameUIPolicy::OnRootLayoutAddedToViewport(UCommonLocalPlayer* LocalPlayer, UPrimaryGameLayout* Layout)
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| {
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| #if WITH_EDITOR
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| if (GIsEditor && LocalPlayer->IsPrimaryPlayer())
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| {
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| FSlateApplication::Get().SetUserFocusToGameViewport(0);
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| }
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| #endif
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| }
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| void UGameUIPolicy::OnRootLayoutRemovedFromViewport(UCommonLocalPlayer* LocalPlayer, UPrimaryGameLayout* Layout)
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| {
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| }
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| void UGameUIPolicy::OnRootLayoutReleased(UCommonLocalPlayer* LocalPlayer, UPrimaryGameLayout* Layout)
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| {
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| }
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| void UGameUIPolicy::RequestPrimaryControl(UPrimaryGameLayout* Layout)
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| {
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| if (LocalMultiplayerInteractionMode == ELocalMultiplayerInteractionMode::SingleToggle && Layout->IsDormant())
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| {
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| for (const FRootViewportLayoutInfo& LayoutInfo : RootViewportLayouts)
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| {
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| UPrimaryGameLayout* RootLayout = LayoutInfo.RootLayout;
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| if (RootLayout && !RootLayout->IsDormant())
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| {
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| RootLayout->SetIsDormant(true);
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| break;
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| }
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| }
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| Layout->SetIsDormant(false);
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| }
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| }
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| void UGameUIPolicy::CreateLayoutWidget(UCommonLocalPlayer* LocalPlayer)
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| {
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| if (APlayerController* PlayerController = LocalPlayer->GetPlayerController(GetWorld()))
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| {
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| TSubclassOf<UPrimaryGameLayout> LayoutWidgetClass = GetLayoutWidgetClass(LocalPlayer);
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| if (ensure(LayoutWidgetClass && !LayoutWidgetClass->HasAnyClassFlags(CLASS_Abstract)))
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| {
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| UPrimaryGameLayout* NewLayoutObject = CreateWidget<UPrimaryGameLayout>(PlayerController, LayoutWidgetClass);
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| RootViewportLayouts.Emplace(LocalPlayer, NewLayoutObject, true);
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| AddLayoutToViewport(LocalPlayer, NewLayoutObject);
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| }
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| }
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| }
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| TSubclassOf<UPrimaryGameLayout> UGameUIPolicy::GetLayoutWidgetClass(UCommonLocalPlayer* LocalPlayer)
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| {
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| return LayoutClass.LoadSynchronous();
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| }
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