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6046bb9cc9
- Clean up FDragConnection construction and add a factory function in SGraphPin to extend it for some pins - Clean up arguments to FOnGetContextMenuFor in SGraphPanel - Various modifications to SGraphPin to permit implementation of wire knots/reroute nodes #codereview nick.whiting [CL 2074801 by Michael Noland in Main branch]
81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.
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#pragma once
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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 GRAPHEDITOR_API 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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void SetHoveredPin(class UEdGraphPin* InPin);
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void SetHoveredNode(const TSharedPtr<class SGraphNode>& InNode);
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void SetHoveredGraph(const TSharedPtr<class SGraphPanel>& InGraph);
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void SetHoveredCategoryName(const FString& InHoverCategoryName);
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void SetHoveredAction(TSharedPtr<struct FEdGraphSchemaAction> Action);
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// Interface to override
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virtual void HoverTargetChanged() {}
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virtual FReply DroppedOnPin(FVector2D ScreenPosition, FVector2D GraphPosition) { return FReply::Unhandled(); }
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virtual FReply DroppedOnNode(FVector2D ScreenPosition, FVector2D GraphPosition) { return FReply::Unhandled(); }
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virtual FReply DroppedOnPanel( const TSharedRef< class SWidget >& Panel, FVector2D ScreenPosition, FVector2D GraphPosition, UEdGraph& Graph) { return FReply::Unhandled(); }
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virtual FReply DroppedOnAction(TSharedRef<struct FEdGraphSchemaAction> Action) { return FReply::Unhandled(); }
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virtual FReply DroppedOnCategory(FString Category) { return FReply::Unhandled(); }
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virtual void OnDragBegin(const TSharedRef<class SGraphPin>& InPin) {}
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// End of interface to override
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protected:
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void SetFeedbackMessage(const TSharedPtr<SWidget>& Message);
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void SetSimpleFeedbackMessage(const FSlateBrush* Icon, const FSlateColor& IconColor, const FText& Message);
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UEdGraphPin* GetHoveredPin() const;
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UEdGraphNode* GetHoveredNode() const;
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UEdGraph* GetHoveredGraph() const;
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/** Constructs the window and widget if applicable */
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virtual void Construct();
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private:
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// The pin that the drag action is currently hovering over
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TWeakObjectPtr<class UEdGraphPin> HoveredPin;
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// The node that the drag action is currently hovering over
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TSharedPtr<class SGraphNode> HoveredNode;
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// The graph that the drag action is currently hovering over
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TSharedPtr<class SGraphPanel> HoveredGraph;
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protected:
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// Name of category we are hovering over
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FString HoveredCategoryName;
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// Action we are hovering over
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TWeakPtr<struct FEdGraphSchemaAction> HoveredAction;
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};
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// Drag-drop action where an FEdGraphSchemaAction should be performed when dropped
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class GRAPHEDITOR_API 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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virtual void HoverTargetChanged() OVERRIDE;
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virtual FReply DroppedOnPanel( const TSharedRef< class SWidget >& Panel, FVector2D ScreenPosition, FVector2D GraphPosition, UEdGraph& Graph) 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->ActionNode = 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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/** */
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TSharedPtr<FEdGraphSchemaAction> ActionNode;
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};
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