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UnrealEngine/Engine/Source/Editor/UnrealEd/Private/ViewportSelectionUtilities.cpp
Brandyn / Techy fcc1b09210 init
2026-04-04 15:40:51 -05:00

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// Copyright Epic Games, Inc. All Rights Reserved.
#include "ViewportSelectionUtilities.h"
#include "ActorEditorUtils.h"
#include "AssetSelection.h"
#include "Components/PointLightComponent.h"
#include "Components/PrimitiveComponent.h"
#include "Dialogs/Dialogs.h"
#include "Editor.h"
#include "EditorModeManager.h"
#include "Elements/Framework/TypedElementSelectionSet.h"
#include "Engine/Brush.h"
#include "Engine/PointLight.h"
#include "Engine/Selection.h"
#include "Engine/StaticMeshActor.h"
#include "Engine/TargetPoint.h"
#include "EngineUtils.h"
#include "GameFramework/Actor.h"
#include "ILevelEditor.h"
#include "InputCoreTypes.h"
#include "LevelEditorViewport.h"
#include "LightMap.h"
#include "Logging/MessageLog.h"
#include "Materials/MaterialInterface.h"
#include "Model.h"
#include "SEditorViewport.h"
#include "ScopedTransaction.h"
#include "Settings/LevelEditorViewportSettings.h"
#include "SnappingUtils.h"
#include "StaticLightingSystem/StaticLightingPrivate.h"
#include "UObject/Class.h"
DEFINE_LOG_CATEGORY_STATIC(LogViewportSelectionUtilities, Log, All);
#define LOCTEXT_NAMESPACE "ViewportSelectionUtilities"
namespace UE::Editor::ViewportSelectionUtilities
{
static const FEditorModeTools* GetModeTools(const FEditorViewportClient* InEditorViewportClient)
{
if (InEditorViewportClient)
{
return InEditorViewportClient->GetModeTools();
}
return nullptr;
}
static UTypedElementSelectionSet* GetElementSelectionSet(const FEditorViewportClient* InEditorViewportClient)
{
if (const FEditorModeTools* const ModeTools = GetModeTools(InEditorViewportClient))
{
return ModeTools->GetEditorSelectionSet();
}
return nullptr;
}
/**
* Creates an actor of the specified type, trying first to find an actor factory,
* falling back to "ACTOR ADD" exec and SpawnActor if no factory is found.
* Does nothing if ActorClass is NULL.
*/
static AActor* PrivateAddActor(UClass* ActorClass)
{
return FActorFactoryAssetProxy::AddActorForAsset(ActorClass);
}
/**
* This function picks a color from under the mouse in the viewport and adds a light with that color.
* This is to make it easy for LDs to add lights that fake radiosity.
* @param Viewport Viewport to pick color from.
* @param Click A class that has information about where and how the user clicked on the viewport.
*/
void PickColorAndAddLight(FViewport* Viewport, const FViewportClick& Click)
{
// Read pixels from viewport.
TArray<FColor> OutputBuffer;
// We need to redraw the viewport before reading pixels otherwise we may be reading back from an old buffer.
Viewport->Draw();
Viewport->ReadPixels(OutputBuffer);
// Sample the color we want.
const int32 ClickX = Click.GetClickPos().X;
const int32 ClickY = Click.GetClickPos().Y;
const int32 PixelIdx = ClickX + ClickY * (int32)Viewport->GetSizeXY().X;
if (PixelIdx < OutputBuffer.Num())
{
const FColor PixelColor = OutputBuffer[PixelIdx];
AActor* NewActor = PrivateAddActor(APointLight::StaticClass());
APointLight* Light = CastChecked<APointLight>(NewActor);
Light->SetMobility(EComponentMobility::Stationary);
UPointLightComponent* PointLightComponent = Cast<UPointLightComponent>(Light->GetLightComponent());
PointLightComponent->LightColor = PixelColor;
}
}
bool ClickElement(FEditorViewportClient* InViewportClient, const FTypedElementHandle& InHitElement, const FViewportClick& Click)
{
// Pivot snapping
if (Click.GetKey() == EKeys::MiddleMouseButton && Click.IsAltDown())
{
// GEditor->SetPivot(GEditor->ClickLocation, true, false, true); // TODO: This last param is only for actor
// pivots return true;
return false; // Let actor and component clicks handle pivots for now
}
UTypedElementSelectionSet* ElementSelectionSet = GetElementSelectionSet(InViewportClient);
if (!ElementSelectionSet)
{
return false;
}
bool bHandledClick = false;
const bool bIsLeftClickSelection = Click.GetKey() == EKeys::LeftMouseButton
&& !(InViewportClient->Viewport->KeyState(EKeys::T)
|| InViewportClient->Viewport->KeyState(EKeys::L)
|| InViewportClient->Viewport->KeyState(EKeys::S)
|| InViewportClient->Viewport->KeyState(EKeys::A));
const bool bIsRightClickSelection = Click.GetKey() == EKeys::RightMouseButton && !Click.IsControlDown()
&& !InViewportClient->Viewport->KeyState(EKeys::LeftMouseButton);
if (bIsLeftClickSelection || bIsRightClickSelection)
{
const ETypedElementSelectionMethod SelectionMethod = Click.GetEvent() == IE_DoubleClick
? ETypedElementSelectionMethod::Secondary
: ETypedElementSelectionMethod::Primary;
if (const FTypedElementHandle ResolvedElement =
ElementSelectionSet->GetSelectionElement(InHitElement, SelectionMethod))
{
bHandledClick = true;
const FTypedElementSelectionOptions SelectionOptions =
FTypedElementSelectionOptions().SetAllowHidden(true).SetWarnIfLocked(true);
bool bNeedViewportRefresh = false;
if (ElementSelectionSet->CanSelectElement(ResolvedElement, SelectionOptions))
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ClickingOnElements", "Clicking on Elements"));
const bool bAllowSelectionModifiers =
bIsLeftClickSelection && ElementSelectionSet->AllowSelectionModifiers(ResolvedElement);
if (Click.IsControlDown() && bAllowSelectionModifiers)
{
if (ElementSelectionSet->IsElementSelected(
ResolvedElement, FTypedElementIsSelectedOptions().SetAllowIndirect(true)
))
{
ElementSelectionSet->DeselectElement(ResolvedElement, SelectionOptions);
}
else
{
ElementSelectionSet->SelectElement(ResolvedElement, SelectionOptions);
}
}
else if (Click.IsShiftDown() && bAllowSelectionModifiers)
{
ElementSelectionSet->SelectElement(ResolvedElement, SelectionOptions);
}
else
{
// Skip the clear if we're doing a RMB select and this actor is already selected, as we want to summon the menu for the current selection
if (bIsLeftClickSelection
|| !ElementSelectionSet->IsElementSelected(
ResolvedElement, FTypedElementIsSelectedOptions().SetAllowIndirect(true)
))
{
bNeedViewportRefresh =
bIsRightClickSelection; // Refresh the viewport so the user will see what they just clicked while the menu is open
GEditor->DeselectAllSurfaces();
ElementSelectionSet->ClearSelection(SelectionOptions);
}
ElementSelectionSet->SelectElement(ResolvedElement, SelectionOptions);
}
// Notify any pending selection change now, as this avoids the visual pivot location "lagging" behind the actual selection,
// and also ensures that the pivot is at the correct location prior to opening any context menus (which block the update)
ElementSelectionSet->NotifyPendingChanges();
}
if (bNeedViewportRefresh)
{
// Redraw the viewport so the user can see which object was clicked on
InViewportClient->Viewport->Draw();
FlushRenderingCommands();
}
if (bIsRightClickSelection)
{
InViewportClient->SummonContextMenu(ResolvedElement);
}
}
}
return bHandledClick;
}
bool ClickActor(FEditorViewportClient* InViewportClient, AActor* InActor, const FViewportClick& Click, bool bAllowSelectionChange)
{
// Pivot snapping
if (Click.GetKey() == EKeys::MiddleMouseButton && Click.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false, true);
return true;
}
// Handle selection.
else if (Click.GetKey() == EKeys::RightMouseButton && !Click.IsControlDown()
&& !InViewportClient->Viewport->KeyState(EKeys::LeftMouseButton))
{
bool bNeedViewportRefresh = false;
if (InActor)
{
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "ClickingOnActorsContextMenu", "Clicking on Actors (context menu)")
);
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Actor (context menu): %s (%s)"), *InActor->GetClass()->GetName(), *InActor->GetActorLabel() );
GEditor->GetSelectedActors()->Modify();
if (bAllowSelectionChange && GEditor->CanSelectActor(InActor, true, true))
{
// If the actor the user clicked on was already selected, then we won't bother clearing the selection
if (!InActor->IsActorOrSelectionParentSelected())
{
GEditor->SelectNone(false, true);
bNeedViewportRefresh = true;
}
// Select the actor the user clicked on
GEditor->SelectActor(InActor, true, true);
}
}
if (bNeedViewportRefresh)
{
// Redraw the viewport so the user can see which object was right clicked on
InViewportClient->Viewport->Draw();
FlushRenderingCommands();
}
InViewportClient->SummonContextMenu(
InActor ? UEngineElementsLibrary::AcquireEditorActorElementHandle(InActor) : FTypedElementHandle()
);
return true;
}
else if (Click.GetEvent() == IE_DoubleClick && Click.GetKey() == EKeys::LeftMouseButton && !Click.IsControlDown()
&& !Click.IsShiftDown())
{
if (InActor)
{
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "ClickingOnActorsDouble-Click", "Clicking on Actors (double-click)")
);
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Actor (double click): %s (%s)"), *InActor->GetClass()->GetName(), *InActor->GetActorLabel());
GEditor->GetSelectedActors()->Modify();
if (bAllowSelectionChange && GEditor->CanSelectActor(InActor, true, true))
{
// Clear the selection
GEditor->SelectNone(false, true);
// Select the actor the user clicked on
GEditor->SelectActor(InActor, true, true);
}
}
return true;
}
else if (Click.GetKey() != EKeys::RightMouseButton)
{
if (Click.GetKey() == EKeys::LeftMouseButton && InViewportClient->Viewport->KeyState(EKeys::T) && InActor)
{
TArray<UActorComponent*> Components;
InActor->GetComponents(Components);
SetDebugLightmapSample(&Components, NULL, 0, GEditor->ClickLocation);
}
else if (Click.GetKey() == EKeys::LeftMouseButton && InViewportClient->Viewport->KeyState(EKeys::L))
{
// If shift is down, we pick a color from under the mouse in the viewport and create a light with that color.
if (Click.IsControlDown())
{
PickColorAndAddLight(InViewportClient->Viewport, Click);
}
else
{
// Create a point light (they default to stationary)
PrivateAddActor(APointLight::StaticClass());
}
return true;
}
else if (Click.GetKey() == EKeys::LeftMouseButton && InViewportClient->Viewport->KeyState(EKeys::S))
{
// Create a static mesh.
PrivateAddActor(AStaticMeshActor::StaticClass());
return true;
}
else if (Click.GetKey() == EKeys::LeftMouseButton && InViewportClient->Viewport->KeyState(EKeys::A))
{
// Create an actor of the selected class.
UClass* SelectedClass = GEditor->GetSelectedObjects()->GetTop<UClass>();
if (SelectedClass)
{
PrivateAddActor(SelectedClass);
}
return true;
}
else if (InActor)
{
if (bAllowSelectionChange && GEditor->CanSelectActor(InActor, true, true, true))
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ClickingOnActors", "Clicking on Actors"));
GEditor->GetSelectedActors()->Modify();
// Ctrl- or shift- clicking an actor is the same as regular clicking when components are selected
const bool bComponentSelected = GEditor->GetSelectedComponentCount() > 0;
if (Click.IsControlDown() && !bComponentSelected)
{
const bool bSelect = !InActor->IsSelected();
if (bSelect)
{
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Actor (CTRL LMB): %s (%s)"), *InActor->GetClass()->GetName(), *InActor->GetActorLabel());
}
GEditor->SelectActor(InActor, bSelect, true, true);
}
else if (Click.IsShiftDown() && !bComponentSelected)
{
if (!InActor->IsSelected())
{
const bool bSelect = true;
GEditor->SelectActor(InActor, bSelect, true, true);
}
}
else
{
// check to see how many actors need deselecting first - and warn as appropriate
int32 NumSelectedActors = GEditor->GetSelectedActors()->Num();
if (NumSelectedActors >= EditorActorSelectionDefs::MaxActorsToSelectBeforeWarning)
{
const FText ConfirmText = FText::Format(
NSLOCTEXT(
"UnrealEd", "Warning_ManyActorsToSelectOne", "There are {0} selected actors. Selecting this actor will deselect them all. Are you sure?"
),
FText::AsNumber(NumSelectedActors)
);
FSuppressableWarningDialog::FSetupInfo Info(
ConfirmText, NSLOCTEXT("UnrealEd", "Warning_ManyActors", "Warning: Many Actors"), "Warning_ManyActors"
);
Info.ConfirmText = NSLOCTEXT("ModalDialogs", "ManyActorsToSelectOneConfirm", "Continue Selection");
Info.CancelText =
NSLOCTEXT("ModalDialogs", "ManyActorsToSelectOneCancel", "Keep Current Selection");
FSuppressableWarningDialog ManyActorsWarning(Info);
if (ManyActorsWarning.ShowModal() == FSuppressableWarningDialog::Cancel)
{
return false;
}
}
GEditor->SelectNone(false, true, false);
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Actor (LMB): %s (%s)"), *InActor->GetClass()->GetName(), *InActor->GetActorLabel());
GEditor->SelectActor(InActor, true, true, true);
}
}
return false;
}
}
return false;
}
bool ClickComponent(FEditorViewportClient* ViewportClient, HActor* ActorHitProxy, const FViewportClick& Click)
{
//@todo hotkeys for component placement?
bool bComponentClicked = false;
USceneComponent* Component = nullptr;
if (ActorHitProxy->Actor->IsChildActor())
{
AActor* TestActor = ActorHitProxy->Actor;
do
{
Component = TestActor->GetParentComponent();
TestActor = TestActor->GetParentActor();
}
while (TestActor->IsChildActor());
}
else
{
UPrimitiveComponent* TestComponent = ConstCast(ActorHitProxy->PrimComponent);
if (ActorHitProxy->Actor->GetComponents().Contains(TestComponent))
{
Component = TestComponent;
}
}
// If the component selected is a visualization component, we want to select the non-visualization component it's attached to
while (Component != nullptr && Component->IsVisualizationComponent())
{
Component = Component->GetAttachParent();
}
if (Component == nullptr)
{
// It's possible to have a null component here if the primitive component contained in the hit proxy is not part
// of the actor contained in the hit proxy. In that case, component click is not possible
// (but actor click can still be used as a fallback) :
return false;
}
// Pivot snapping
if (Click.GetKey() == EKeys::MiddleMouseButton && Click.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false);
return true;
}
// Selection + context menu
else if (Click.GetKey() == EKeys::RightMouseButton && !Click.IsControlDown()
&& !ViewportClient->Viewport->KeyState(EKeys::LeftMouseButton))
{
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "ClickingOnComponentContextMenu", "Clicking on Component (context menu)")
);
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Component (context menu): %s (%s)"), *Component->GetClass()->GetName(), *Component->GetName());
const auto EditorComponentSelection = GEditor->GetSelectedComponents();
EditorComponentSelection->Modify();
// If the component the user clicked on was already selected, then we won't bother clearing the selection
bool bNeedViewportRefresh = false;
if (!EditorComponentSelection->IsSelected(Component))
{
EditorComponentSelection->DeselectAll();
bNeedViewportRefresh = true;
}
GEditor->SelectComponent(Component, true, true);
if (bNeedViewportRefresh)
{
// Redraw the viewport so the user can see which object was right clicked on
ViewportClient->Viewport->Draw();
FlushRenderingCommands();
}
ViewportClient->SummonContextMenu();
bComponentClicked = true;
}
// Selection only
else if (Click.GetKey() == EKeys::LeftMouseButton)
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ClickingOnComponents", "Clicking on Components"));
GEditor->GetSelectedComponents()->Modify();
if (Click.IsControlDown())
{
const bool bSelect = !Component->IsSelected();
if (bSelect)
{
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Component (CTRL LMB): %s (%s)"), *Component->GetClass()->GetName(), *Component->GetName());
}
GEditor->SelectComponent(Component, bSelect, true, true);
bComponentClicked = true;
}
else if (Click.IsShiftDown())
{
if (!Component->IsSelected())
{
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Component (SHIFT LMB): %s (%s)"), *Component->GetClass()->GetName(), *Component->GetName());
GEditor->SelectComponent(Component, true, true, true);
}
bComponentClicked = true;
}
else
{
GEditor->GetSelectedComponents()->DeselectAll();
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("Clicking on Component (LMB): %s (%s)"), *Component->GetClass()->GetName(), *Component->GetName());
GEditor->SelectComponent(Component, true, true, true);
bComponentClicked = true;
}
}
return bComponentClicked;
}
void ClickBrushVertex(FEditorViewportClient* ViewportClient, ABrush* InBrush, FVector* InVertex, const FViewportClick& InClick)
{
// Pivot snapping
if (InClick.GetKey() == EKeys::MiddleMouseButton && InClick.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false, true);
}
else if (InClick.GetKey() == EKeys::RightMouseButton)
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ClickingOnBrushVertex", "Clicking on Brush Vertex"));
const FTransform ActorToWorld = InBrush->ActorToWorld();
GEditor->SetPivot(ActorToWorld.TransformPosition(*InVertex), false, false);
const FVector World = ActorToWorld.TransformPosition(*InVertex);
FVector Snapped = World;
FSnappingUtils::SnapPointToGrid(Snapped, FVector(GEditor->GetGridSize()));
const FVector Delta = Snapped - World;
GEditor->SetPivot(Snapped, false, false);
if (ViewportClient->GetModeTools()->IsDefaultModeActive())
{
// All selected actors need to move by the delta.
for (FSelectionIterator It(GEditor->GetSelectedActorIterator()); It; ++It)
{
AActor* Actor = static_cast<AActor*>(*It);
checkSlow(Actor->IsA(AActor::StaticClass()));
Actor->Modify();
FVector ActorLocation = Actor->GetActorLocation() + Delta;
Actor->SetActorLocation(ActorLocation, false);
}
}
ViewportClient->Invalidate(true, true);
// Update Bsp
GEditor->RebuildAlteredBSP();
}
}
void ClickStaticMeshVertex(FEditorViewportClient* ViewportClient, AActor* InActor, FVector& InVertex, const FViewportClick& InClick)
{
// Pivot snapping
if (InClick.GetKey() == EKeys::MiddleMouseButton && InClick.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false, true);
}
else if (InClick.GetKey() == EKeys::RightMouseButton)
{
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "ClickingOnStaticMeshVertex", "Clicking on Static Mesh Vertex")
);
FVector Snapped = InVertex;
FSnappingUtils::SnapPointToGrid(Snapped, FVector(GEditor->GetGridSize()));
const FVector Delta = Snapped - InVertex;
GEditor->SetPivot(Snapped, false, true);
// All selected actors need to move by the delta.
for (FSelectionIterator It(GEditor->GetSelectedActorIterator()); It; ++It)
{
AActor* Actor = static_cast<AActor*>(*It);
checkSlow(Actor->IsA(AActor::StaticClass()));
Actor->Modify();
FVector ActorLocation = Actor->GetActorLocation() + Delta;
Actor->SetActorLocation(ActorLocation, false);
}
ViewportClient->Invalidate(true, true);
}
}
static FBspSurf GSaveSurf;
void ClickSurface(FEditorViewportClient* ViewportClient, UModel* Model, int32 InSurf, const FViewportClick& Click)
{
// Gizmos can cause BSP surfs to become selected without this check
if (Click.GetKey() == EKeys::RightMouseButton && Click.IsControlDown())
{
return;
}
// Remember hit location for actor-adding.
FBspSurf& Surf = Model->Surfs[InSurf];
// Pivot snapping
if (Click.GetKey() == EKeys::MiddleMouseButton && Click.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false, true);
}
else if (Click.GetKey() == EKeys::LeftMouseButton && Click.IsShiftDown() && Click.IsControlDown())
{
if (!GetDefault<ULevelEditorViewportSettings>()->bClickBSPSelectsBrush)
{
// Add to the actor selection set the brush actor that belongs to this BSP surface.
// Check Surf.Actor, as it can be NULL after deleting brushes and before rebuilding BSP.
if (Surf.Actor)
{
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "SelectBrushFromSurface", "Select Brush from Surface")
);
// If the builder brush is selected, first deselect it.
USelection* SelectedActors = GEditor->GetSelectedActors();
for (FSelectionIterator It(*SelectedActors); It; ++It)
{
ABrush* Brush = Cast<ABrush>(*It);
if (Brush && FActorEditorUtils::IsABuilderBrush(Brush))
{
GEditor->SelectActor(Brush, false, false);
break;
}
}
GEditor->SelectActor(Surf.Actor, true, true);
}
}
else
{
// Select or deselect surfaces.
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "SelectSurfaces", "Select Surfaces"));
Model->ModifySurf(InSurf, false);
Surf.PolyFlags ^= PF_Selected;
}
GEditor->NoteSelectionChange();
}
}
else if (Click.GetKey() == EKeys::LeftMouseButton && Click.IsShiftDown())
{
FEditorDelegates::LoadSelectedAssetsIfNeeded.Broadcast();
// Apply texture to all selected.
const FScopedTransaction Transaction(
NSLOCTEXT("UnrealEd", "ApplyMaterialToSelectedSurfaces", "Apply Material to Selected Surfaces")
);
UMaterialInterface* SelectedMaterialInstance = GEditor->GetSelectedObjects()->GetTop<UMaterialInterface>();
for (int32 i = 0; i < Model->Surfs.Num(); i++)
{
if (Model->Surfs[i].PolyFlags & PF_Selected)
{
Model->ModifySurf(i, 1);
Model->Surfs[i].Material = SelectedMaterialInstance;
const bool bUpdateTexCoords = false;
const bool bOnlyRefreshSurfaceMaterials = true;
GEditor->polyUpdateBrush(Model, i, bUpdateTexCoords, bOnlyRefreshSurfaceMaterials);
}
}
}
else if (Click.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::A))
{
// Create an actor of the selected class.
UClass* SelectedClass = GEditor->GetSelectedObjects()->GetTop<UClass>();
if (SelectedClass)
{
PrivateAddActor(SelectedClass);
}
}
else if (Click.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::L))
{
// If shift is down, we pick a color from under the mouse in the viewport and create a light with that color.
if (Click.IsControlDown())
{
PickColorAndAddLight(ViewportClient->Viewport, Click);
}
else
{
// Create a point light (they default to stationary)
PrivateAddActor(APointLight::StaticClass());
}
}
else if (IsTexelDebuggingEnabled() && Click.GetKey() == EKeys::LeftMouseButton
&& ViewportClient->Viewport->KeyState(EKeys::T))
{
SetDebugLightmapSample(NULL, Model, InSurf, GEditor->ClickLocation);
}
else if (Click.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::S))
{
// Create a static mesh.
PrivateAddActor(AStaticMeshActor::StaticClass());
}
else if (Click.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::Semicolon))
{
PrivateAddActor(ATargetPoint::StaticClass());
}
else if (Click.IsAltDown() && Click.GetKey() == EKeys::RightMouseButton)
{
// Grab the texture.
GEditor->GetSelectedObjects()->DeselectAll(UMaterialInterface::StaticClass());
if (Surf.Material)
{
GEditor->GetSelectedObjects()->Select(Surf.Material);
}
GSaveSurf = Surf;
}
else if (Click.IsAltDown() && Click.GetKey() == EKeys::LeftMouseButton)
{
FEditorDelegates::LoadSelectedAssetsIfNeeded.Broadcast();
// Apply texture to the one polygon clicked on.
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ApplyMaterialToSurface", "Apply Material to Surface"));
Model->ModifySurf(InSurf, true);
Surf.Material = GEditor->GetSelectedObjects()->GetTop<UMaterialInterface>();
if (Click.IsControlDown())
{
Surf.vTextureU = GSaveSurf.vTextureU;
Surf.vTextureV = GSaveSurf.vTextureV;
if (Surf.vNormal == GSaveSurf.vNormal)
{
UE_LOG(LogViewportSelectionUtilities, Log, TEXT("WARNING: the texture coordinates were not parallel to the surface.") );
}
Surf.PolyFlags = GSaveSurf.PolyFlags;
const bool bUpdateTexCoords = true;
const bool bOnlyRefreshSurfaceMaterials = true;
GEditor->polyUpdateBrush(Model, InSurf, bUpdateTexCoords, bOnlyRefreshSurfaceMaterials);
}
else
{
const bool bUpdateTexCoords = false;
const bool bOnlyRefreshSurfaceMaterials = true;
GEditor->polyUpdateBrush(Model, InSurf, bUpdateTexCoords, bOnlyRefreshSurfaceMaterials);
}
}
else if (Click.GetKey() == EKeys::RightMouseButton && !Click.IsControlDown())
{
// Select surface and display context menu
check(Model);
bool bNeedViewportRefresh = false;
bool bSelectionChanged = !Surf.Actor || !Surf.Actor->IsSelected();
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "SelectSurfaces", "Select Surfaces"));
USelection* SelectedActors = GEditor->GetSelectedActors();
SelectedActors->BeginBatchSelectOperation();
// We only need to unselect surfaces if the surface the user clicked on was not already selected
if (!(Surf.PolyFlags & PF_Selected))
{
GEditor->SelectNone(false, true);
bNeedViewportRefresh = true;
bSelectionChanged = true;
}
// Select the surface the user clicked on
Model->ModifySurf(InSurf, false);
Surf.PolyFlags |= PF_Selected;
GEditor->SelectActor(Surf.Actor, true, false);
SelectedActors->EndBatchSelectOperation(false);
if (bSelectionChanged)
{
GEditor->NoteSelectionChange();
}
}
if (bNeedViewportRefresh)
{
// Redraw the viewport so the user can see which object was right clicked on
ViewportClient->Viewport->Draw();
FlushRenderingCommands();
}
ViewportClient->SummonContextMenu();
}
else if (Click.GetEvent() == IE_DoubleClick && Click.GetKey() == EKeys::LeftMouseButton && !Click.IsControlDown())
{
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "SelectSurface", "Select Surface"));
// Clear the selection
GEditor->SelectNone(false, true);
// Select the surface
const uint32 SelectMask = Surf.PolyFlags & PF_Selected;
Model->ModifySurf(InSurf, false);
Surf.PolyFlags = (Surf.PolyFlags & ~PF_Selected) | (SelectMask ^ PF_Selected);
}
GEditor->NoteSelectionChange();
// Display the surface properties window
GEditor->Exec(ViewportClient->GetWorld(), TEXT("EDCALLBACK SURFPROPS"));
}
else
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "SelectBrushSurface", "Select Brush Surface"));
bool bDeselectAlreadyHandled = false;
bool bSelectionChanged = !Surf.Actor || !Surf.Actor->IsSelected();
USelection* SelectedActors = GEditor->GetSelectedActors();
SelectedActors->BeginBatchSelectOperation();
// We are going to handle the notification ourselves
const bool bNotify = false;
if (GetDefault<ULevelEditorViewportSettings>()->bClickBSPSelectsBrush)
{
// Add to the actor selection set the brush actor that belongs to this BSP surface.
// Check Surf.Actor, as it can be NULL after deleting brushes and before rebuilding BSP.
if (Surf.Actor)
{
if (!Click.IsControlDown())
{
GEditor->SelectNone(false, true);
bDeselectAlreadyHandled = true;
}
// If the builder brush is selected, first deselect it.
for (FSelectionIterator It(*SelectedActors); It; ++It)
{
ABrush* Brush = Cast<ABrush>(*It);
if (Brush && FActorEditorUtils::IsABuilderBrush(Brush))
{
GEditor->SelectActor(Brush, false, bNotify);
break;
}
}
GEditor->SelectActor(Surf.Actor, true, bNotify);
}
}
// Select or deselect surfaces.
{
if (Click.IsControlDown() || !(Surf.PolyFlags & PF_Selected))
{
bSelectionChanged = true;
}
if (!Click.IsControlDown() && !bDeselectAlreadyHandled)
{
GEditor->SelectNone(false, true);
}
Model->ModifySurf(InSurf, false);
Surf.PolyFlags ^= PF_Selected;
// If there are no surfaces selected now, deselect the actor
if (!Model->HasSelectedSurfaces())
{
GEditor->SelectActor(Surf.Actor, false, bNotify);
bSelectionChanged = true;
}
}
SelectedActors->EndBatchSelectOperation(false);
if (bSelectionChanged)
{
GEditor->NoteSelectionChange();
}
}
}
void ClickBackdrop(FEditorViewportClient* ViewportClient, const FViewportClick& InClick)
{
// Pivot snapping
if (InClick.GetKey() == EKeys::MiddleMouseButton && InClick.IsAltDown())
{
GEditor->SetPivot(GEditor->ClickLocation, true, false, true);
}
else if (InClick.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::A))
{
// Create an actor of the selected class.
UClass* SelectedClass = GEditor->GetSelectedObjects()->GetTop<UClass>();
if (SelectedClass)
{
PrivateAddActor(SelectedClass);
}
}
else if (IsTexelDebuggingEnabled() && InClick.GetKey() == EKeys::LeftMouseButton
&& ViewportClient->Viewport->KeyState(EKeys::T))
{
SetDebugLightmapSample(NULL, NULL, 0, GEditor->ClickLocation);
}
else if (InClick.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::L))
{
// If shift is down, we pick a color from under the mouse in the viewport and create a light with that color.
if (InClick.IsControlDown())
{
PickColorAndAddLight(ViewportClient->Viewport, InClick);
}
else
{
// Create a point light (they default to stationary)
PrivateAddActor(APointLight::StaticClass());
}
}
else if (InClick.GetKey() == EKeys::LeftMouseButton && ViewportClient->Viewport->KeyState(EKeys::S))
{
// Create a static mesh.
PrivateAddActor(AStaticMeshActor::StaticClass());
}
else if (InClick.GetKey() == EKeys::RightMouseButton && !InClick.IsControlDown()
&& !ViewportClient->Viewport->KeyState(EKeys::LeftMouseButton))
{
// NOTE: We intentionally do not deselect selected actors here even though the user right
// clicked on an empty background. This is because LDs often use wireframe modes to
// interact with brushes and such, and it's easier to summon the context menu for
// these actors when right clicking *anywhere* will not deselect things.
// Redraw the viewport so the user can see which object was right clicked on
ViewportClient->Viewport->Draw();
FlushRenderingCommands();
ViewportClient->SummonContextMenu();
}
else if (InClick.GetKey() == EKeys::LeftMouseButton)
{
if (!InClick.IsControlDown())
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "ClickingBackground", "Clicking Background"));
GEditor->SelectNone(true, true);
}
}
}
void ClickLevelSocket(FEditorViewportClient* ViewportClient, HHitProxy* HitProxy, const FViewportClick& Click)
{
const FScopedTransaction Transaction(NSLOCTEXT("UnrealEd", "LevelSocketClicked", "Level Socket Clicked"));
FMessageLog EditorErrors("EditorErrors");
EditorErrors.NewPage(LOCTEXT("SocketClickedNewPage", "Socket Clicked"));
// Attach the selected actors to the socket that was clicked
HLevelSocketProxy* SocketProxy = static_cast<HLevelSocketProxy*>(HitProxy);
check(SocketProxy->SceneComponent);
check(SocketProxy->Actor);
for (FSelectionIterator It(GEditor->GetSelectedActorIterator()); It; ++It)
{
if (AActor* Actor = Cast<AActor>(*It))
{
// Parent actors and handle socket snapping.
// Will cause editor to refresh viewport.
FText ReasonText;
if (GEditor->CanParentActors(SocketProxy->Actor, Actor, &ReasonText) == false)
{
EditorErrors.Error(ReasonText);
}
else
{
GEditor->ParentActors(SocketProxy->Actor, Actor, SocketProxy->SocketName, SocketProxy->SceneComponent);
}
}
}
// Report errors
EditorErrors.Notify(NSLOCTEXT("ActorAttachmentError", "AttachmentsFailed", "Attachments Failed!"));
}
} // namespace UE::Editor::ViewportUtilities
// Used by Deprecated code
namespace LevelViewportClickHandlers
{
static void PrivateSummonViewportMenu( FLevelEditorViewportClient* ViewportClient )
{
if (ViewportClient->ParentLevelEditor.IsValid())
{
ViewportClient->ParentLevelEditor.Pin()->SummonLevelViewportViewOptionMenu(LVT_Perspective);
}
}
bool ClickViewport(FLevelEditorViewportClient* ViewportClient, const FViewportClick& Click)
{
if (Click.GetKey() == EKeys::MiddleMouseButton && Click.IsControlDown())
{
PrivateSummonViewportMenu(ViewportClient);
return true;
}
return false;
}
bool ClickElement(FLevelEditorViewportClient* ViewportClient, const FTypedElementHandle& HitElement, const FViewportClick& Click)
{
return UE::Editor::ViewportSelectionUtilities::ClickElement(ViewportClient, HitElement, Click);
}
bool ClickActor(FLevelEditorViewportClient* ViewportClient,AActor* Actor,const FViewportClick& Click,bool bAllowSelectionChange)
{
return UE::Editor::ViewportSelectionUtilities::ClickActor(ViewportClient, Actor, Click, bAllowSelectionChange);
}
bool ClickComponent(FLevelEditorViewportClient* ViewportClient, HActor* ActorHitProxy, const FViewportClick& Click)
{
return UE::Editor::ViewportSelectionUtilities::ClickComponent(ViewportClient, ActorHitProxy, Click);
}
void ClickBrushVertex(FLevelEditorViewportClient* ViewportClient,ABrush* InBrush,FVector* InVertex,const FViewportClick& Click)
{
UE::Editor::ViewportSelectionUtilities::ClickBrushVertex(ViewportClient, InBrush, InVertex, Click);
}
void ClickStaticMeshVertex(FLevelEditorViewportClient* ViewportClient,AActor* InActor,FVector& InVertex,const FViewportClick& Click)
{
UE::Editor::ViewportSelectionUtilities::ClickStaticMeshVertex(ViewportClient, InActor, InVertex, Click);
}
void ClickSurface(FLevelEditorViewportClient* ViewportClient,UModel* Model,int32 iSurf,const FViewportClick& Click)
{
UE::Editor::ViewportSelectionUtilities::ClickSurface(ViewportClient, Model, iSurf, Click);
}
void ClickBackdrop(FLevelEditorViewportClient* ViewportClient,const FViewportClick& Click)
{
UE::Editor::ViewportSelectionUtilities::ClickBackdrop(ViewportClient, Click);
}
void ClickLevelSocket(FLevelEditorViewportClient* ViewportClient, HHitProxy* HitProxy, const FViewportClick& Click)
{
UE::Editor::ViewportSelectionUtilities::ClickLevelSocket(ViewportClient, HitProxy, Click);
}
}
#undef LOCTEXT_NAMESPACE
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