DragAndDrop.h File Reference

#include "CoreMinimal.h"
#include "Input/CursorReply.h"
#include "Input/Events.h"
#include "Input/DragAndDrop.inl"

Go to the source code of this file.

Classes
class	FDragDropOperation
class	FDragDropEvent
class	FExternalDragOperation
class	FGameDragDropOperation

Macros
#define	DRAG_DROP_OPERATOR_TYPE(TYPE, BASE)

Functions
	DECLARE_DELEGATE_TwoParams (FOnDragDropEnded, bool, const FDragDropEvent &) DECLARE_DELEGATE_OneParam(FOnDragDropUpdate

Macro Definition Documentation

DRAG_DROP_OPERATOR_TYPE

#define DRAG_DROP_OPERATOR_TYPE	(		TYPE,
			BASE
	)

Value:

    static const FString& GetTypeId() { static FString Type = TEXT(#TYPE); return Type; } \
    virtual bool IsOfTypeImpl(const FString& Type) const override { return GetTypeId() == Type || BASE::IsOfTypeImpl(Type); }

All drag drop operations that require type checking must include this macro. Example Usage: class FMyDragDropOp : public FDragDropOperation { public: DRAG_DROP_OPERATOR_TYPE(FMyDragDropOp, FDragDropOperation) ... };

Function Documentation

DECLARE_DELEGATE_TwoParams()

DECLARE_DELEGATE_TwoParams	(	FOnDragDropEnded	,
		bool	,
		const FDragDropEvent &
	)

Invoked when a drag and drop is finished. This allows the widget that started the drag/drop to respond to the end of the operation.

Parameters

bWasDropHandled	True when the drag and drop operation was handled by some widget; False when no widget handled the drop.
DragDropEvent	The Drop event that terminated the whole DragDrop operation A delegate invoked on the initiator of the DragDrop operation. This delegate is invoked periodically during the DragDrop, and gives the initiator an opportunity to respond to the current state of the process. e.g. Create and update a custom cursor.