130 lines
4.7 KiB
C++
130 lines
4.7 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "BlueprintEditor.h"
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#include "Containers/Array.h"
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#include "Containers/UnrealString.h"
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#include "CoreMinimal.h"
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#include "Engine/Blueprint.h"
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#include "GraphEditorDragDropAction.h"
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#include "Input/DragAndDrop.h"
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#include "Input/Reply.h"
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#include "Math/Vector2D.h"
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#include "MyBlueprintItemDragDropAction.h"
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#include "Templates/SharedPointer.h"
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#include "UObject/Class.h"
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#include "UObject/NameTypes.h"
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#include "UObject/UnrealNames.h"
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#include "UObject/UnrealType.h"
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#include "UObject/WeakObjectPtr.h"
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#include "UObject/WeakObjectPtrTemplates.h"
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#define UE_API KISMET_API
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class UBlueprint;
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class UEdGraph;
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class UEdGraphNode;
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struct FEdGraphSchemaAction;
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struct FSlateBrush;
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struct FSlateColor;
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/** DragDropAction class for dropping a Variable onto a graph */
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class FKismetVariableDragDropAction : public FMyBlueprintItemDragDropAction
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{
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public:
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DRAG_DROP_OPERATOR_TYPE(FKismetVariableDragDropAction, FMyBlueprintItemDragDropAction)
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// FGraphEditorDragDropAction interface
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UE_API virtual void HoverTargetChanged() override;
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UE_API virtual FReply DroppedOnPin(const FVector2f& ScreenPosition, const FVector2f& GraphPosition) override;
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UE_API virtual FReply DroppedOnNode(const FVector2f& ScreenPosition, const FVector2f& GraphPosition) override;
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UE_API virtual FReply DroppedOnPanel(const TSharedRef< class SWidget >& Panel, const FVector2f& ScreenPosition, const FVector2f& GraphPosition, UEdGraph& Graph) override;
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// End of FGraphEditorDragDropAction
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static TSharedRef<FKismetVariableDragDropAction> New(TSharedPtr<FEdGraphSchemaAction> InAction, FName InVariableName, UStruct* InVariableSource, FNodeCreationAnalytic AnalyticCallback)
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{
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TSharedRef<FKismetVariableDragDropAction> Operation = MakeShareable(new FKismetVariableDragDropAction);
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Operation->VariableName = InVariableName;
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Operation->VariableSource = InVariableSource;
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Operation->AnalyticCallback = AnalyticCallback;
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Operation->SourceAction = InAction;
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Operation->Construct();
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return Operation;
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}
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FProperty* GetVariableProperty()
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{
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if (VariableSource.IsValid() && VariableName != NAME_None)
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{
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return FindFProperty<FProperty>(VariableSource.Get(), VariableName);
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}
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return nullptr;
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}
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protected:
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/** Construct a FKismetVariableDragDropAction */
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UE_API FKismetVariableDragDropAction();
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/** Structure for required node construction parameters */
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struct FNodeConstructionParams
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{
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FDeprecateSlateVector2D GraphPosition;
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UEdGraph* Graph;
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FName VariableName;
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TWeakObjectPtr<UStruct> VariableSource;
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};
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// FGraphSchemaActionDragDropAction interface
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UE_API virtual void GetDefaultStatusSymbol(const FSlateBrush*& PrimaryBrushOut, FSlateColor& IconColorOut, FSlateBrush const*& SecondaryBrushOut, FSlateColor& SecondaryColorOut) const override;
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// End of FGraphSchemaActionDragDropAction interface
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// FMyBlueprintItemDragDropAction interface
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UE_API virtual UBlueprint* GetSourceBlueprint() const override;
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// End of FMyBlueprintItemDragDropAction interface
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/** Called when user selects to create a Getter for the variable */
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static UE_API void MakeGetter(FNodeConstructionParams InParams);
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/** Called when user selects to create a Setter for the variable */
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static UE_API void MakeSetter(FNodeConstructionParams InParams);
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/** Called too check if we can execute a setter on a given property */
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static UE_API bool CanExecuteMakeSetter(FNodeConstructionParams InParams, FProperty* InVariableProperty);
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/**
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* Test new variable type against existing links for node and get any links that will break
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*
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* @param Node The node with existing links
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* @param NewVariableProperty the property for the new variable type
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* @param OutBroken All of the links which are NOT compatible with the new type
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*/
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UE_API void GetLinksThatWillBreak(UEdGraphNode* Node, FProperty* NewVariableProperty, TArray<class UEdGraphPin*>& OutBroken);
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/** Indicates if replacing the variable node, with the new property will require any links to be broken*/
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bool WillBreakLinks( UEdGraphNode* Node, FProperty* NewVariableProperty )
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{
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TArray<class UEdGraphPin*> BadLinks;
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GetLinksThatWillBreak(Node,NewVariableProperty,BadLinks);
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return BadLinks.Num() > 0;
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}
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/**
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* Checks if the property can be dropped in a graph
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*
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* @param InVariableProperty The variable property to check with
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* @param InGraph The graph to check against placing the variable
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*/
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UE_API bool CanVariableBeDropped(const FProperty* InVariableProperty, const UEdGraph& InGraph) const;
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/** Returns the local variable's scope, if any */
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UE_API UStruct* GetLocalVariableScope() const;
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protected:
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/** Name of variable being dragged */
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FName VariableName;
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/** Scope this variable belongs to */
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TWeakObjectPtr<UStruct> VariableSource;
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};
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#undef UE_API
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