C++ TSet::CreateConstIterator方法代码示例

void FPathContextMenu::GetPackageNamesInSelectedPaths(TArray<FString>& OutPackageNames) const
{
	// Load the asset registry module
	FAssetRegistryModule& AssetRegistryModule = FModuleManager::Get().LoadModuleChecked<FAssetRegistryModule>(TEXT("AssetRegistry"));

	// Form a filter from the paths
	FARFilter Filter;
	Filter.bRecursivePaths = true;
	for (int32 PathIdx = 0; PathIdx < SelectedPaths.Num(); ++PathIdx)
	{
		const FString& Path = SelectedPaths[PathIdx];
		new (Filter.PackagePaths) FName(*Path);
	}

	// Query for a list of assets in the selected paths
	TArray<FAssetData> AssetList;
	AssetRegistryModule.Get().GetAssets(Filter, AssetList);

	// Form a list of unique package names from the assets
	TSet<FName> UniquePackageNames;
	for (int32 AssetIdx = 0; AssetIdx < AssetList.Num(); ++AssetIdx)
	{
		UniquePackageNames.Add(AssetList[AssetIdx].PackageName);
	}

	// Add all unique package names to the output
	for ( auto PackageIt = UniquePackageNames.CreateConstIterator(); PackageIt; ++PackageIt )
	{
		OutPackageNames.Add( (*PackageIt).ToString() );
	}
}

bool FPropertyEditorToolkit::IsExposedAsColumn( const TWeakPtr< IPropertyTreeRow >& Row ) const
{
	bool Result = false;

	if (Row.IsValid())
	{
		const TSharedPtr< FPropertyPath > RowPathPtr = Row.Pin()->GetPropertyPath();
		if ( RowPathPtr.IsValid() )
		{
			TSharedRef< FPropertyPath > TrimmedPath = RowPathPtr->TrimRoot( PropertyTable->GetRootPath()->GetNumProperties() );
			const TSet< TSharedRef< IPropertyTableRow > > SelectedRows = PropertyTable->GetSelectedRows();

			for( auto RowIter = SelectedRows.CreateConstIterator(); RowIter; ++RowIter )
			{
				TrimmedPath = TrimmedPath->TrimRoot( (*RowIter)->GetPartialPath()->GetNumProperties() );
				break;
			}

			for (int Index = 0; Index < PropertyPathsAddedAsColumns.Num(); Index++)
			{
				if ( FPropertyPath::AreEqual( TrimmedPath, PropertyPathsAddedAsColumns[ Index ] ) )
				{
					Result = true;
					break;
				}
			}
		}
	}

	return Result;
}

void UEdGraphSchema::BreakPinLinks(UEdGraphPin& TargetPin, bool bSendsNodeNotifcation) const
{
#if WITH_EDITOR
	// Copy the old pin links
	TArray<class UEdGraphPin*> OldLinkedTo(TargetPin.LinkedTo);
#endif

	TargetPin.BreakAllPinLinks();

#if WITH_EDITOR
	TSet<UEdGraphNode*> NodeList;
	// Notify this node
	TargetPin.GetOwningNode()->PinConnectionListChanged(&TargetPin);
	NodeList.Add(TargetPin.GetOwningNode());

	// As well as all other nodes that were connected
	for (TArray<UEdGraphPin*>::TIterator PinIt(OldLinkedTo); PinIt; ++PinIt)
	{
		UEdGraphPin* OtherPin = *PinIt;
		UEdGraphNode* OtherNode = OtherPin->GetOwningNode();
		OtherNode->PinConnectionListChanged(OtherPin);
		NodeList.Add(OtherNode);
	}

	if (bSendsNodeNotifcation)
	{
		// Send all nodes that received a new pin connection a notification
		for (auto It = NodeList.CreateConstIterator(); It; ++It)
		{
			UEdGraphNode* Node = (*It);
			Node->NodeConnectionListChanged();
		}
	}
#endif	//#if WITH_EDITOR
}

// Update the drawing policy with the set of hovered pins (which can be empty)
void FConnectionDrawingPolicy::SetHoveredPins(const TSet< TWeakObjectPtr<UEdGraphPin> >& InHoveredPins, const TArray< TSharedPtr<SGraphPin> >& OverridePins, double HoverTime)
{
	HoveredPins.Empty();

	LastHoverTimeEvent = (OverridePins.Num() > 0) ? 0.0 : HoverTime;

	for (auto PinIt = OverridePins.CreateConstIterator(); PinIt; ++PinIt)
	{
		if (SGraphPin* GraphPin = PinIt->Get())
		{
			HoveredPins.Add(GraphPin->GetPinObj());
		}
	}

	// Convert the widget pointer for hovered pins to be EdGraphPin pointers for their connected nets (both ends of any connection)
	for (auto PinIt = InHoveredPins.CreateConstIterator(); PinIt; ++PinIt)
	{
		if (UEdGraphPin* Pin = PinIt->Get())
		{
			if (Pin->LinkedTo.Num() > 0)
			{
				HoveredPins.Add(Pin);

				for (auto LinkIt = Pin->LinkedTo.CreateConstIterator(); LinkIt; ++LinkIt)
				{
					HoveredPins.Add(*LinkIt);
				}
			}
		}
	}
}

void FKismetConnectionDrawingPolicy::ResetIncompatiblePinDrawState(const TSet< TSharedRef<SWidget> >& VisiblePins)
{
	for(auto VisiblePinIterator = VisiblePins.CreateConstIterator(); VisiblePinIterator; ++VisiblePinIterator)
	{
		TSharedPtr<SGraphPin> VisiblePin = StaticCastSharedRef<SGraphPin>(*VisiblePinIterator);
		VisiblePin->SetPinColorModifier(FLinearColor::White);
	}
}

void FPropertyEditorToolkit::ToggleColumnForProperty( const TSharedPtr< FPropertyPath >& PropertyPath )
{
	if ( !PropertyPath.IsValid() )
	{
		return;
	}

	TSharedRef< FPropertyPath > NewPath = PropertyPath->TrimRoot( PropertyTable->GetRootPath()->GetNumProperties() );
	const TSet< TSharedRef< IPropertyTableRow > > SelectedRows = PropertyTable->GetSelectedRows();
	
	for( auto RowIter = SelectedRows.CreateConstIterator(); RowIter; ++RowIter )
	{
		NewPath = NewPath->TrimRoot( (*RowIter)->GetPartialPath()->GetNumProperties() );
		break;
	}

	if ( NewPath->GetNumProperties() == 0 )
	{
		return;
	}

	TSharedPtr< IPropertyTableColumn > ExistingColumn;
	for( auto ColumnIter = PropertyTable->GetColumns().CreateConstIterator(); ColumnIter; ++ColumnIter )
	{
		TSharedRef< IPropertyTableColumn > Column = *ColumnIter;
		const TSharedPtr< FPropertyPath > Path = Column->GetDataSource()->AsPropertyPath();

		if ( Path.IsValid() && FPropertyPath::AreEqual( Path.ToSharedRef(), NewPath ) )
		{
			ExistingColumn = Column;
		}
	}

	if ( ExistingColumn.IsValid() )
	{
		PropertyTable->RemoveColumn( ExistingColumn.ToSharedRef() );
		const TSharedRef< FPropertyPath > ColumnPath = ExistingColumn->GetDataSource()->AsPropertyPath().ToSharedRef();
		for (int Index = PropertyPathsAddedAsColumns.Num() - 1; Index >= 0 ; Index--)
		{
			if ( FPropertyPath::AreEqual( ColumnPath, PropertyPathsAddedAsColumns[ Index ] ) )
			{
				PropertyPathsAddedAsColumns.RemoveAt( Index );
			}
		}
	}
	else
	{
		PropertyTable->AddColumn( NewPath );
		PropertyPathsAddedAsColumns.Add( NewPath );
	}
}

void FKismetConnectionDrawingPolicy::SetIncompatiblePinDrawState(const TSharedPtr<SGraphPin>& StartPin, const TSet< TSharedRef<SWidget> >& VisiblePins)
{
	ResetIncompatiblePinDrawState(VisiblePins);

	for(auto VisiblePinIterator = VisiblePins.CreateConstIterator(); VisiblePinIterator; ++VisiblePinIterator)
	{
		TSharedPtr<SGraphPin> CheckPin = StaticCastSharedRef<SGraphPin>(*VisiblePinIterator);
		if(CheckPin != StartPin)
		{
			const FPinConnectionResponse Response = StartPin->GetPinObj()->GetSchema()->CanCreateConnection(StartPin->GetPinObj(), CheckPin->GetPinObj());
			if(Response.Response == CONNECT_RESPONSE_DISALLOW)
			{
				CheckPin->SetPinColorModifier(FLinearColor(0.25f, 0.25f, 0.25f, 0.5f));
			}
		}
	}
}

FReply FDragConnection::DroppedOnPin(FVector2D ScreenPosition, FVector2D GraphPosition)
{
	TArray<UEdGraphPin*> ValidSourcePins;
	ValidateGraphPinList(/*out*/ ValidSourcePins);

	const FScopedTransaction Transaction( NSLOCTEXT("UnrealEd", "GraphEd_CreateConnection", "Create Pin Link") );

	UEdGraphPin* PinB = GetHoveredPin();
	bool bError = false;
	TSet<UEdGraphNode*> NodeList;

	for (UEdGraphPin* PinA : ValidSourcePins)
	{
		if ((PinA != NULL) && (PinB != NULL))
		{
			UEdGraph* MyGraphObj = PinA->GetOwningNode()->GetGraph();

			if (MyGraphObj->GetSchema()->TryCreateConnection(PinA, PinB))
			{
				NodeList.Add(PinA->GetOwningNode());
				NodeList.Add(PinB->GetOwningNode());
			}
		}
		else
		{
			bError = true;
		}
	}

	// Send all nodes that received a new pin connection a notification
	for (auto It = NodeList.CreateConstIterator(); It; ++It)
	{
		UEdGraphNode* Node = (*It);
		Node->NodeConnectionListChanged();
	}

	if (bError)
	{
		return FReply::Unhandled();
	}

	return FReply::Handled();
}

void UEdGraphNode::BreakAllNodeLinks()
{
	TSet<UEdGraphNode*> NodeList;

	NodeList.Add(this);

	// Iterate over each pin and break all links
	for(int32 PinIdx=0; PinIdx<Pins.Num(); PinIdx++)
	{
		Pins[PinIdx]->BreakAllPinLinks();
		NodeList.Add(Pins[PinIdx]->GetOwningNode());
	}

	// Send all nodes that received a new pin connection a notification
	for (auto It = NodeList.CreateConstIterator(); It; ++It)
	{
		UEdGraphNode* Node = (*It);
		Node->NodeConnectionListChanged();
	}
}

void FPropertyEditorToolkit::GridSelectionChanged()
{
	TArray< TWeakObjectPtr< UObject > > SelectedObjects;
	PropertyTable->GetSelectedObjects( SelectedObjects );
	PropertyTree->SetObjectArray( SelectedObjects );

	const TSet< TSharedRef< IPropertyTableRow > > SelectedRows = PropertyTable->GetSelectedRows();

	if ( SelectedRows.Num() == 1 )
	{
		for( auto RowIter = SelectedRows.CreateConstIterator(); RowIter; ++RowIter )
		{
			PropertyTree->SetRootPath( PropertyTable->GetRootPath()->ExtendPath( (*RowIter)->GetPartialPath() ) );
			break;
		}
	}
	else if ( !FPropertyPath::AreEqual( PropertyTree->GetRootPath(), PropertyTable->GetRootPath() ) )
	{
		PropertyTree->SetRootPath( PropertyTable->GetRootPath() );
	}
}

void USoundCueGraphNode_Base::AutowireNewNode(UEdGraphPin* FromPin)
{
	if (FromPin != NULL)
	{
		const USoundCueGraphSchema* Schema = CastChecked<USoundCueGraphSchema>(GetSchema());

		TSet<UEdGraphNode*> NodeList;

		// auto-connect from dragged pin to first compatible pin on the new node
		for (int32 i=0; i<Pins.Num(); i++)
		{
			UEdGraphPin* Pin = Pins[i];
			check(Pin);
			FPinConnectionResponse Response = Schema->CanCreateConnection(FromPin, Pin);
			if (ECanCreateConnectionResponse::CONNECT_RESPONSE_MAKE == Response.Response)
			{
				if (Schema->TryCreateConnection(FromPin, Pin))
				{
					NodeList.Add(FromPin->GetOwningNode());
					NodeList.Add(this);
				}
				break;
			}
			else if(ECanCreateConnectionResponse::CONNECT_RESPONSE_BREAK_OTHERS_A == Response.Response)
			{
				InsertNewNode(FromPin, Pin, NodeList);
				break;
			}
		}

		// Send all nodes that received a new pin connection a notification
		for (auto It = NodeList.CreateConstIterator(); It; ++It)
		{
			UEdGraphNode* Node = (*It);
			Node->NodeConnectionListChanged();
		}
	}
}

void UEdGraphSchema::BreakNodeLinks(UEdGraphNode& TargetNode) const
{
#if WITH_EDITOR
	TSet<UEdGraphNode*> NodeList;
	NodeList.Add(&TargetNode);
	
	// Iterate over each pin and break all links
	for (TArray<UEdGraphPin*>::TIterator PinIt(TargetNode.Pins); PinIt; ++PinIt)
	{
		UEdGraphPin* TargetPin = *PinIt;
		if (TargetPin)
		{
			// Keep track of which node(s) the pin's connected to
			for (auto OtherPin : TargetPin->LinkedTo)
			{
				if (OtherPin)
				{
					UEdGraphNode* OtherNode = OtherPin->GetOwningNode();
					if (OtherNode)
					{
						NodeList.Add(OtherNode);
					}
				}
			}

			BreakPinLinks(*TargetPin, false);
		}
	}
	
	// Send all nodes that lost connections a notification
	for (auto It = NodeList.CreateConstIterator(); It; ++It)
	{
		UEdGraphNode* Node = (*It);
		Node->NodeConnectionListChanged();
	}
#endif	//#if WITH_EDITOR
}

void UK2Node::AutowireNewNode(UEdGraphPin* FromPin)
{
	const UEdGraphSchema_K2* K2Schema = CastChecked<UEdGraphSchema_K2>(GetSchema());
	
	// Do some auto-connection
	if (FromPin != NULL)
	{
		TSet<UEdGraphNode*> NodeList;

		// sometimes we don't always find an ideal connection, but we want to exhaust 
		// all our options first... this stores a secondary less-ideal pin to connect to, if nothing better was found
		UEdGraphPin* BackupConnection = NULL;
		// If not dragging an exec pin, auto-connect from dragged pin to first compatible pin on the new node
		for (int32 i=0; i<Pins.Num(); i++)
		{
			UEdGraphPin* Pin = Pins[i];
			check(Pin);

			ECanCreateConnectionResponse ConnectResponse = K2Schema->CanCreateConnection(FromPin, Pin).Response;
			if (ConnectResponse == ECanCreateConnectionResponse::CONNECT_RESPONSE_MAKE)
			{
				if (K2Schema->TryCreateConnection(FromPin, Pin))
				{
					NodeList.Add(FromPin->GetOwningNode());
					NodeList.Add(this);
				}

				// null out the backup connection (so we don't attempt to make it 
				// once we exit the loop... we successfully made this connection!)
				BackupConnection = NULL;
				break;
			}
			else if((FromPin->PinType.PinCategory == K2Schema->PC_Exec) && (ConnectResponse == ECanCreateConnectionResponse::CONNECT_RESPONSE_BREAK_OTHERS_A))
			{
				InsertNewNode(FromPin, Pin, NodeList);

				// null out the backup connection (so we don't attempt to make it 
				// once we exit the loop... we successfully made this connection!)
				BackupConnection = NULL;
				break;
			}
			else if ((BackupConnection == NULL) && (ConnectResponse == ECanCreateConnectionResponse::CONNECT_RESPONSE_MAKE_WITH_CONVERSION_NODE))
			{
				// save this off, in-case we don't make any connection at all
				BackupConnection = Pin;
			}
		}

		// if we didn't find an ideal connection, then lets connect this pin to 
		// the BackupConnection (something, like a connection that requires a conversion node, etc.)
		if ((BackupConnection != NULL) && K2Schema->TryCreateConnection(FromPin, BackupConnection))
		{
			NodeList.Add(FromPin->GetOwningNode());
			NodeList.Add(this);
		}

		// If we were not dragging an exec pin, but it was an output pin, try and connect the Then and Execute pins
		if ((FromPin->PinType.PinCategory != K2Schema->PC_Exec  && FromPin->Direction == EGPD_Output))
		{
			UEdGraphNode* FromPinNode = FromPin->GetOwningNode();
			UEdGraphPin* FromThenPin = FromPinNode->FindPin(K2Schema->PN_Then);

			UEdGraphPin* ToExecutePin = FindPin(K2Schema->PN_Execute);

			if ((FromThenPin != NULL) && (FromThenPin->LinkedTo.Num() == 0) && (ToExecutePin != NULL) && K2Schema->ArePinsCompatible(FromThenPin, ToExecutePin, NULL))
			{
				if (K2Schema->TryCreateConnection(FromThenPin, ToExecutePin))
				{
					NodeList.Add(FromPinNode);
					NodeList.Add(this);
				}
			}
		}

		// Send all nodes that received a new pin connection a notification
		for (auto It = NodeList.CreateConstIterator(); It; ++It)
		{
			UEdGraphNode* Node = (*It);
			Node->NodeConnectionListChanged();
		}
	}
}

void SDetailsViewBase::QueryCustomDetailLayout(FDetailLayoutBuilderImpl& CustomDetailLayout)
{
	FPropertyEditorModule& ParentPlugin = FModuleManager::GetModuleChecked<FPropertyEditorModule>("PropertyEditor");

	// Get the registered classes that customize details
	FCustomDetailLayoutNameMap& GlobalCustomLayoutNameMap = ParentPlugin.ClassNameToDetailLayoutNameMap;

	UStruct* BaseStruct = GetBaseStruct();

	// All the current customization instances need to be deleted when it is safe
	CustomizationClassInstancesPendingDelete = CustomizationClassInstances;

	CustomizationClassInstances.Empty();

	//Ask for generic details not specific to an object being viewed 
	if (GenericLayoutDelegate.IsBound())
	{
		// Create a new instance of the custom detail layout for the current class
		TSharedRef<IDetailCustomization> CustomizationInstance = GenericLayoutDelegate.Execute();

		// Ask for details immediately
		CustomizationInstance->CustomizeDetails(CustomDetailLayout);

		// Save the instance from destruction until we refresh
		CustomizationClassInstances.Add(CustomizationInstance);
	}


	// Sort them by query order.  @todo not good enough
	struct FCompareFDetailLayoutCallback
	{
		FORCEINLINE bool operator()(const FDetailLayoutCallback& A, const FDetailLayoutCallback& B) const
		{
			return A.Order < B.Order;
		}
	};

	TMap< TWeakObjectPtr<UStruct>, FDetailLayoutCallback*> FinalCallbackMap;

	for (auto ClassIt = ClassesWithProperties.CreateConstIterator(); ClassIt; ++ClassIt)
	{
		// Check the instanced map first
		FDetailLayoutCallback* Callback = InstancedClassToDetailLayoutMap.Find(*ClassIt);

		if (!Callback)
		{
			// callback wasn't found in the per instance map, try the global instances instead
			Callback = GlobalCustomLayoutNameMap.Find((*ClassIt)->GetFName());
		}

		if (Callback)
		{
			FinalCallbackMap.Add(*ClassIt, Callback);
		}
	}


	FinalCallbackMap.ValueSort(FCompareFDetailLayoutCallback());

	TSet<UStruct*> QueriedClasses;

	if (FinalCallbackMap.Num() > 0)
	{
		// Ask each class that we have properties for to customize its layout
		for (auto LayoutIt(FinalCallbackMap.CreateConstIterator()); LayoutIt; ++LayoutIt)
		{
			const TWeakObjectPtr<UStruct> WeakClass = LayoutIt.Key();

			if (WeakClass.IsValid())
			{
				UStruct* Class = WeakClass.Get();

				FClassInstanceToPropertyMap& InstancedPropertyMap = ClassToPropertyMap.FindChecked(Class->GetFName());
				for (FClassInstanceToPropertyMap::TIterator InstanceIt(InstancedPropertyMap); InstanceIt; ++InstanceIt)
				{
					FName Key = InstanceIt.Key();
					CustomDetailLayout.SetCurrentCustomizationClass(CastChecked<UClass>(Class), Key);

					const FOnGetDetailCustomizationInstance& DetailDelegate = LayoutIt.Value()->DetailLayoutDelegate;

					if (DetailDelegate.IsBound())
					{
						QueriedClasses.Add(Class);

						// Create a new instance of the custom detail layout for the current class
						TSharedRef<IDetailCustomization> CustomizationInstance = DetailDelegate.Execute();

						// Ask for details immediately
						CustomizationInstance->CustomizeDetails(CustomDetailLayout);

						// Save the instance from destruction until we refresh
						CustomizationClassInstances.Add(CustomizationInstance);
					}
				}
			}
		}
	}

	// Ensure that the base class and its parents are always queried
	TSet<UStruct*> ParentClassesToQuery;
//.........这里部分代码省略.........