129 lines
5.4 KiB
C++
129 lines
5.4 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "Containers/UnrealString.h"
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#include "CoreMinimal.h"
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#include "EdGraph/EdGraphPin.h"
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#include "EdGraph/EdGraphSchema.h"
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#include "Input/DragAndDrop.h"
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#include "Input/Reply.h"
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#include "Internationalization/Text.h"
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#include "Layout/Visibility.h"
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#include "Math/Vector2D.h"
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#include "Styling/SlateColor.h"
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#include "Templates/SharedPointer.h"
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#include "UObject/WeakObjectPtrTemplates.h"
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#define UE_API GRAPHEDITOR_API
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class SGraphNode;
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class SGraphPanel;
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class SWidget;
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class UEdGraph;
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class UEdGraphNode;
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class UEdGraphPin;
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class UEdGraphSchema;
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struct FEdGraphSchemaAction;
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struct FSlateBrush;
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// Base class for drag-drop actions that pass into the graph editor and perform an action when dropped
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class FGraphEditorDragDropAction : public FDragDropOperation
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{
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public:
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DRAG_DROP_OPERATOR_TYPE(FGraphEditorDragDropAction, FDragDropOperation)
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UE_API FGraphEditorDragDropAction();
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UE_API void SetHoveredPin(UEdGraphPin* InPin);
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UE_API void SetHoveredNode(const TSharedPtr<SGraphNode>& InNode);
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UE_API void SetHoveredNode(UEdGraphNode* InNode);
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UE_API void SetHoveredGraph(const TSharedPtr<SGraphPanel>& InGraph);
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UE_API void SetHoveredCategoryName(const FText& InHoverCategoryName);
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UE_API void SetHoveredAction(TSharedPtr<struct FEdGraphSchemaAction> Action);
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void SetDropTargetValid( bool bValid ) { bDropTargetValid = bValid; }
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// Interface to override
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virtual void HoverTargetChanged() {}
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UE_DEPRECATED(5.6, "Use the version of the function accepting FVector2f; this Slate API no longer interfaces directly with double-precision scalars and vectors.")
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UE_API virtual FReply DroppedOnPin(FVector2D ScreenPosition, FVector2D GraphPosition) UE_SLATE_DEPRECATED_VECTOR_VIRTUAL_FUNCTION;
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UE_API virtual FReply DroppedOnPin(const FVector2f& ScreenPosition, const FVector2f& GraphPosition);
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UE_DEPRECATED(5.6, "Use the version of the function accepting FVector2f; this Slate API no longer interfaces directly with double-precision scalars and vectors.")
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UE_API virtual FReply DroppedOnNode(FVector2D ScreenPosition, FVector2D GraphPosition) UE_SLATE_DEPRECATED_VECTOR_VIRTUAL_FUNCTION;
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UE_API virtual FReply DroppedOnNode(const FVector2f& ScreenPosition, const FVector2f& GraphPosition);
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UE_DEPRECATED(5.6, "Use the version of the function accepting FVector2f; this Slate API no longer interfaces directly with double-precision scalars and vectors.")
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UE_API virtual FReply DroppedOnPanel(const TSharedRef< SWidget >& Panel, FVector2D ScreenPosition, FVector2D GraphPosition, UEdGraph& Graph) UE_SLATE_DEPRECATED_VECTOR_VIRTUAL_FUNCTION;
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UE_API virtual FReply DroppedOnPanel(const TSharedRef< SWidget >& Panel, const FVector2f& ScreenPosition, const FVector2f& GraphPosition, UEdGraph& Graph);
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virtual FReply DroppedOnAction(TSharedRef<struct FEdGraphSchemaAction> Action) { return FReply::Unhandled(); }
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virtual FReply DroppedOnCategory(FText Category) { return FReply::Unhandled(); }
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// End of interface to override
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virtual bool IsSupportedBySchema(const UEdGraphSchema* Schema) const { return true; }
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UE_API bool HasFeedbackMessage();
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UE_API void SetFeedbackMessage(const TSharedPtr<SWidget>& Message);
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UE_API void SetSimpleFeedbackMessage(const FSlateBrush* Icon, const FSlateColor& IconColor, const FText& Message, const FSlateBrush* SecondaryIcon = nullptr, const FSlateColor SecondaryColor = FSlateColor());
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protected:
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UE_API UEdGraphPin* GetHoveredPin() const;
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UE_API UEdGraphNode* GetHoveredNode() const;
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UE_API UEdGraph* GetHoveredGraph() const;
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/** Constructs the window and widget if applicable */
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UE_API virtual void Construct() override;
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UE_API virtual EVisibility GetIconVisible() const;
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UE_API virtual EVisibility GetErrorIconVisible() const;
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private:
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// The pin that the drag action is currently hovering over
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FEdGraphPinReference HoveredPin;
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// The node that the drag action is currently hovering over
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TWeakObjectPtr<UEdGraphNode> HoveredNode;
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// The graph that the drag action is currently hovering over
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TSharedPtr<SGraphPanel> HoveredGraph;
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protected:
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// Name of category we are hovering over
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FText HoveredCategoryName;
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// Action we are hovering over
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TWeakPtr<struct FEdGraphSchemaAction> HoveredAction;
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// drop target status
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bool bDropTargetValid;
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};
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// Drag-drop action where an FEdGraphSchemaAction should be performed when dropped
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class FGraphSchemaActionDragDropAction : public FGraphEditorDragDropAction
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{
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public:
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DRAG_DROP_OPERATOR_TYPE(FGraphSchemaActionDragDropAction, FGraphEditorDragDropAction)
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// FGraphEditorDragDropAction interface
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UE_API virtual void HoverTargetChanged() override;
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UE_API virtual FReply DroppedOnPanel(const TSharedRef< SWidget >& Panel, const FVector2f& ScreenPosition, const FVector2f& GraphPosition, UEdGraph& Graph) override;
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UE_API virtual FReply DroppedOnPin(const FVector2f& ScreenPosition, const FVector2f& GraphPosition) override;
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// End of FGraphEditorDragDropAction
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static TSharedRef<FGraphSchemaActionDragDropAction> New(TSharedPtr<FEdGraphSchemaAction> InActionNode )
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{
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TSharedRef<FGraphSchemaActionDragDropAction> Operation = MakeShareable(new FGraphSchemaActionDragDropAction);
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Operation->SourceAction = InActionNode;
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Operation->Construct();
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return Operation;
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}
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protected:
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UE_API virtual void GetDefaultStatusSymbol(const FSlateBrush*& PrimaryBrushOut, FSlateColor& IconColorOut, FSlateBrush const*& SecondaryBrushOut, FSlateColor& SecondaryColorOut) const;
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/** */
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TSharedPtr<FEdGraphSchemaAction> SourceAction;
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};
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#undef UE_API
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