371 lines
12 KiB
C++
371 lines
12 KiB
C++
#include "PlayerControllerBase.h"
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#include "Common.h"
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#include "RootCanvas.h"
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#include "Tangible.h"
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#include "TangibleManager.h"
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#include "Blueprint/UserWidget.h"
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#include "Blueprint/WidgetTree.h"
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#include "Components/InputComponent.h"
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#include "Engine/GameInstance.h"
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#include "Engine/GameViewportClient.h"
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#include "Engine/LevelScriptActor.h"
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#include "Engine/LocalPlayer.h"
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#include "Framework/Application/SlateApplication.h"
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#include "Framework/Application/SlateUser.h"
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#include "Kismet/GameplayStatics.h"
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#include "Widgets/SViewport.h"
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AlxPlayerControllerBase *AlxPlayerControllerBase::FromContext(const UObject *Context)
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{
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APlayerController *PC = Context->GetWorld()->GetFirstPlayerController();
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AlxPlayerControllerBase *Result = Cast<AlxPlayerControllerBase>(PC);
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if (Result == nullptr)
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{
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UE_LOG(LogLuprexIntegration, Fatal, TEXT("Not currently using a Luprex Player Controller."));
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}
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return Result;
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}
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const FHitResult &AlxPlayerControllerBase::GetLookAt(const UObject *Context)
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{
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return FromContext(Context)->CurrentLookAt;
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}
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const AActor *AlxPlayerControllerBase::GetLookAtActor(const UObject *Context)
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{
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return FromContext(Context)->CurrentLookAt.GetActor();
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}
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void AlxPlayerControllerBase::SetLookAt(const UObject *Context, const FHitResult &HitResult)
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{
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AlxPlayerControllerBase *PC = FromContext(Context);
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if (PC->CurrentLookAt.HitObjectHandle != HitResult.HitObjectHandle)
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{
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PC->MustCallLookAtChanged = true;
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}
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PC->CurrentLookAt = HitResult;
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}
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void AlxPlayerControllerBase::SetLookAtChanged(const UObject *Context)
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{
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AlxPlayerControllerBase *PC = FromContext(Context);
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PC->MustCallLookAtChanged = true;
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}
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FVector2D AlxPlayerControllerBase::GetLookAtPixel(const UObject *Context)
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{
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AlxPlayerControllerBase *PC = FromContext(Context);
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FVector2D ScreenPosition;
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if (!UGameplayStatics::ProjectWorldToScreen(PC, PC->CurrentLookAt.Location, ScreenPosition, false))
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{
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return FVector2D();
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}
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return ScreenPosition;
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}
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void AlxPlayerControllerBase::BeginPlay()
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{
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// Build the root UMG stack BEFORE Super::BeginPlay. Super calls
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// ReceiveBeginPlay, which fires the Blueprint Event BeginPlay;
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// BP code there may immediately try to add widgets to RootCanvas,
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// so the canvas must already exist.
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RootWidget = CreateWidget<UlxRootWidget>(this);
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RootCanvas = RootWidget->WidgetTree->ConstructWidget<UlxRootCanvasPanel>();
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RootWidget->WidgetTree->RootWidget = RootCanvas;
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RootWidget->AddToViewport(0);
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Super::BeginPlay();
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if (FSlateApplication::IsInitialized())
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{
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FocusChangingHandle = FSlateApplication::Get().OnFocusChanging().AddUObject(
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this, &AlxPlayerControllerBase::HandleFocusChanging);
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}
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}
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void AlxPlayerControllerBase::EndPlay(const EEndPlayReason::Type EndPlayReason)
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{
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if (FocusChangingHandle.IsValid() && FSlateApplication::IsInitialized())
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{
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FSlateApplication::Get().OnFocusChanging().Remove(FocusChangingHandle);
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FocusChangingHandle.Reset();
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}
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if (IsValid(RootWidget))
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{
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RootWidget->RemoveFromParent();
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}
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RootWidget = nullptr;
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RootCanvas = nullptr;
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Super::EndPlay(EndPlayReason);
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}
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void AlxPlayerControllerBase::HandleFocusChanging(
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const FFocusEvent &FocusEvent,
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const FWeakWidgetPath &OldPath,
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const TSharedPtr<SWidget> &OldFocusedWidget,
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const FWidgetPath &NewPath,
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const TSharedPtr<SWidget> &NewFocusedWidget)
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{
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UE_LOG(LogLuprexIntegration, Display,
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TEXT("Focus changing: '%s' -> '%s' (cause: %s)"),
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OldFocusedWidget.IsValid() ? *OldFocusedWidget->GetTypeAsString() : TEXT("<none>"),
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NewFocusedWidget.IsValid() ? *NewFocusedWidget->GetTypeAsString() : TEXT("<none>"),
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*UEnum::GetValueAsString(FocusEvent.GetCause()));
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}
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UInputComponent* AlxPlayerControllerBase::GetWidgetInputComponent(UUserWidget *Widget)
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{
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if (!IsValid(Widget)) return nullptr;
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// Cache the FProperty on first call. FProperties are owned by
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// the native UUserWidget UClass, which lives for the process
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// lifetime, so the pointer stays valid without us needing to
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// root anything against GC. Static local init is thread-safe.
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static FObjectProperty *InputComponentProp = FindFProperty<FObjectProperty>(
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UUserWidget::StaticClass(), TEXT("InputComponent"));
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check(InputComponentProp);
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UObject *Value = InputComponentProp->GetObjectPropertyValue_InContainer(Widget);
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return Cast<UInputComponent>(Value);
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}
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void AlxPlayerControllerBase::RestoreFocusToFrontWidget(const UObject *Context)
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{
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// This will trigger UpdateInputMode to shift focus back to
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// the front window, if the front window wants focus.
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FromContext(Context)->LastWidgetGrantedFocus = nullptr;
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}
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void AlxPlayerControllerBase::AddWidgetToRoot(UUserWidget *Widget)
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{
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if (!IsValid(Widget))
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{
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UE_LOG(LogLuprexIntegration, Error, TEXT("AddWidgetToRoot called with an invalid widget."));
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return;
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}
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APlayerController *OwningPC = Widget->GetOwningPlayer();
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AlxPlayerControllerBase *PC = Cast<AlxPlayerControllerBase>(OwningPC);
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if (PC == nullptr)
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{
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UE_LOG(LogLuprexIntegration, Error,
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TEXT("AddWidgetToRoot: widget '%s' owning player is not an AlxPlayerControllerBase (got %s)."),
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*Widget->GetName(), *GetNameSafe(OwningPC));
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return;
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}
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if (PC->RootCanvas == nullptr)
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{
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UE_LOG(LogLuprexIntegration, Error,
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TEXT("AddWidgetToRoot: root canvas is not initialized, this is probably an initialization order issue"));
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return;
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}
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if (Widget->GetParent() == PC->RootCanvas) return;
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UlxRootCanvasSlot *Slot = PC->RootCanvas->AddChildToRootCanvas(Widget);
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Slot->SlotUnderConstruction = false;
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}
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void AlxPlayerControllerBase::BuildInputStack(TArray<UInputComponent*>& InputStack)
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{
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// Controlled pawn gets last dibs on the input stack
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APawn* ControlledPawn = GetPawnOrSpectator();
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if (ControlledPawn)
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{
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if (ControlledPawn->InputEnabled())
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{
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// Get the explicit input component that is created upon Pawn possession. This one gets last dibs.
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if (ControlledPawn->InputComponent)
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{
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InputStack.Push(ControlledPawn->InputComponent);
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}
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// See if there is another InputComponent that was added to the Pawn's components array (possibly by script).
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for (UActorComponent* ActorComponent : ControlledPawn->GetComponents())
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{
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UInputComponent* PawnInputComponent = Cast<UInputComponent>(ActorComponent);
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if (PawnInputComponent && PawnInputComponent != ControlledPawn->InputComponent)
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{
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InputStack.Push(PawnInputComponent);
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}
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}
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}
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}
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// LevelScriptActors are put on the stack next
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for (ULevel* Level : GetWorld()->GetLevels())
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{
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ALevelScriptActor* ScriptActor = Level->GetLevelScriptActor();
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if (ScriptActor)
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{
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if (ScriptActor->InputEnabled() && ScriptActor->InputComponent)
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{
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InputStack.Push(ScriptActor->InputComponent);
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}
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}
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}
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if (InputEnabled())
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{
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InputStack.Push(InputComponent);
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}
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// Get the widget slots.
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TArray<UlxRootCanvasSlot*> WidgetSlots = RootCanvas->GetSortedUserWidgets();
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// Generate a set of input components that are being managed by the WidgetSlots.
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TSet<UInputComponent*> WidgetManagedComponents;
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for (UlxRootCanvasSlot *Slot : WidgetSlots)
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{
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UUserWidget *Widget = Cast<UUserWidget>(Slot->GetContent());
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UInputComponent *IC = GetWidgetInputComponent(Widget);
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if (IC) WidgetManagedComponents.Add(IC);
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}
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// Add components in the CurrentInputStack, *unless* they are being managed
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// by widgets. If they're being managed by widgets, they get added later.
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for (int32 Idx=0; Idx<CurrentInputStack.Num(); ++Idx)
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{
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UInputComponent* IC = CurrentInputStack[Idx].Get();
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if (IsValid(IC))
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{
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if (!WidgetManagedComponents.Contains(IC)) InputStack.Push(IC);
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}
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else
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{
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CurrentInputStack.RemoveAt(Idx--);
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}
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}
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// Now add the widget-managed input components.
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for (UlxRootCanvasSlot *Slot : ReverseIterate(WidgetSlots))
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{
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if (Slot->EnableEnhancedInput)
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{
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UUserWidget *Widget = Cast<UUserWidget>(Slot->GetContent());
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UInputComponent *IC = GetWidgetInputComponent(Widget);
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if (IC)
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{
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IC->bBlockInput = Slot->BlockInput;
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InputStack.Push(IC);
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}
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}
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}
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}
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void AlxPlayerControllerBase::UpdateInputMode()
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{
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// Get all the various objects we need to be able to manipulate
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// the input mode.
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UGameViewportClient *GameViewportClient = GetWorld()->GetGameViewport();
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ULocalPlayer *LocalPlayer = Cast<ULocalPlayer>(Player);
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if (GameViewportClient == nullptr || LocalPlayer == nullptr) return;
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TSharedPtr<SViewport> ViewportWidget = GameViewportClient->GetGameViewportWidget();
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if (!ViewportWidget.IsValid()) return;
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TSharedRef<SViewport> ViewportWidgetRef = ViewportWidget.ToSharedRef();
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FReply &SlateOperations = LocalPlayer->GetSlateOperations();
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TSharedPtr<FSlateUser> SlateUser = LocalPlayer->GetSlateUser();
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if (!SlateUser.IsValid()) return;
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// Get the desired configuration from the first widget.
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// TODO: Maybe we don't have to sort the whole array.
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TArray<UlxRootCanvasSlot*> WidgetSlots = RootCanvas->GetSortedUserWidgets();
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UUserWidget *Widget = nullptr;
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UWidget *Focus = nullptr;
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bool ShowPointer = false;
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if (!WidgetSlots.IsEmpty())
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{
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UlxRootCanvasSlot *Top = WidgetSlots[0];
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Widget = Cast<UUserWidget>(Top->GetContent());
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Focus = Widget->GetDesiredFocusWidget();
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ShowPointer = Top->ShowPointer;
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}
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SetShowMouseCursor(ShowPointer);
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if (ShowPointer)
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{
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// Only release capture if the viewport is currently holding it
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// (e.g. we just came from GameOnly). A blanket ReleaseMouseCapture
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// every tick would yank capture away from widgets mid-gesture
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// (scrollbar drags, slider drags, etc.).
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if (SlateUser->DoesWidgetHaveAnyCapture(ViewportWidget))
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{
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SlateOperations.ReleaseMouseCapture();
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}
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SlateOperations.ReleaseMouseLock();
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GameViewportClient->SetMouseLockMode(EMouseLockMode::DoNotLock);
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GameViewportClient->SetHideCursorDuringCapture(false);
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GameViewportClient->SetMouseCaptureMode(EMouseCaptureMode::CaptureDuringMouseDown);
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}
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else
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{
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// Also captures the mouse to the viewport.
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SlateOperations.UseHighPrecisionMouseMovement(ViewportWidgetRef);
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SlateOperations.LockMouseToWidget(ViewportWidgetRef);
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GameViewportClient->SetMouseLockMode(EMouseLockMode::LockOnCapture);
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GameViewportClient->SetMouseCaptureMode(EMouseCaptureMode::CapturePermanently);
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}
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GameViewportClient->SetIgnoreInput(false);
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// How we handle focus depends on whether we're showing the pointer.
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// In pointer mode, we set focus to the desired state just once,
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// and then we let the pointer control it from there on. In
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// no-pointer mode, we set focus to the desired state and
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// keep putting it back forever.
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//
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// If the user clicks the mouse on a focusable widget, the
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// viewport client notifies us of that fact. We then focus the
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// widget if possible.
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//
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if ((!ShowPointer) || (LastWidgetGrantedFocus != Focus))
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{
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if (Focus)
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{
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if (TSharedPtr<SWidget> SlateFocus = Focus->GetCachedWidget())
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{
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SlateOperations.SetUserFocus(SlateFocus.ToSharedRef());
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LastWidgetGrantedFocus = Focus;
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}
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}
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else
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{
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SlateOperations.SetUserFocus(ViewportWidgetRef);
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LastWidgetGrantedFocus = nullptr;
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}
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}
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else if (TSharedPtr<SWidget> ClickedWidget = ClickToFocusTarget.Pin())
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{
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SlateOperations.SetUserFocus(ClickedWidget.ToSharedRef());
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}
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ClickToFocusTarget.Reset();
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}
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void AlxPlayerControllerBase::ClickToFocus(TSharedRef<SWidget> Widget)
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{
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ClickToFocusTarget = Widget.ToWeakPtr();
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}
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void AlxPlayerControllerBase::UpdateLookAt()
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{
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UlxTangibleManager *TM = GetGameInstance()->GetSubsystem<UlxTangibleManager>();
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if (TM == nullptr) return;
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UlxTangible *Possessed = TM->GetPossessedTangible();
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if (Possessed == nullptr) return;
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APawn *Pawn = GetPawn();
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if (Pawn == nullptr) return;
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if (Possessed->GetActor() != Cast<AActor>(Pawn)) return;
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if (PlayerCameraManager == nullptr) return;
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CalculateLookAt();
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if (MustCallLookAtChanged)
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{
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MustCallLookAtChanged = false;
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LookAtChanged();
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}
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}
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