SingleClickOrDragBehavior.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "BaseBehaviors/AnyButtonInputBehavior.h"
#include "BehaviorTargetInterfaces.h"
#include "CoreMinimal.h"
#include "InputBehavior.h"
#include "InputBehaviorModifierStates.h"
#include "Math/Ray.h"
#include "Math/Vector2D.h"
#include "Templates/Function.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UObjectGlobals.h"
 
#include "SingleClickOrDragBehavior.generated.h"
 
class IClickBehaviorTarget;
class IClickDragBehaviorTarget;
class UObject;
struct FInputDeviceState;
 
 
UCLASS(MinimalAPI)
class USingleClickOrDragInputBehavior : public UAnyButtonInputBehavior
{
    GENERATED_BODY()
 
public:
 
    FInputBehaviorModifierStates Modifiers;
 
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void Initialize(IClickBehaviorTarget* ClickTarget, IClickDragBehaviorTarget* DragTarget);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void SetDragTarget(IClickDragBehaviorTarget* DragTarget);
 
 
    TFunction<bool(const FInputDeviceState&)> ModifierCheckFunc = nullptr;
 
 
    // UInputBehavior implementation
 
    INTERACTIVETOOLSFRAMEWORK_API virtual FInputCaptureRequest WantsCapture(const FInputDeviceState& Input) override;
    INTERACTIVETOOLSFRAMEWORK_API virtual FInputCaptureUpdate BeginCapture(const FInputDeviceState& Input, EInputCaptureSide eSide) override;
    INTERACTIVETOOLSFRAMEWORK_API virtual FInputCaptureUpdate UpdateCapture(const FInputDeviceState& Input, const FInputCaptureData& Data) override;
    INTERACTIVETOOLSFRAMEWORK_API virtual void ForceEndCapture(const FInputCaptureData& Data) override;
 
 
 
    UPROPERTY()
    bool bBeginDragIfClickTargetNotHit = true;
 
 
    UPROPERTY()
    float ClickDistanceThreshold = 5.0;
 
 
protected:
    IClickBehaviorTarget* ClickTarget;
 
    IClickDragBehaviorTarget* DragTarget;
 
    FVector2D MouseDownPosition2D;
    FRay MouseDownRay;
 
    EInputCaptureSide CaptureSide;
 
    bool bInDrag = false;
 
 
protected:
 
    // flag used to communicate between WantsCapture and BeginCapture
    bool bImmediatelyBeginDragInBeginCapture = false;
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickedInternal(const FInputDeviceState& Input, const FInputCaptureData& Data);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickDragPressInternal(const FInputDeviceState& Input, EInputCaptureSide Side);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickDragInternal(const FInputDeviceState& Input, const FInputCaptureData& Data);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickDragReleaseInternal(const FInputDeviceState& Input, const FInputCaptureData& Data);
 
 
};