ClickDragBehavior.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "BaseBehaviors/AnyButtonInputBehavior.h"
#include "BaseBehaviors/BehaviorTargetInterfaces.h"
#include "BaseBehaviors/InputBehaviorModifierStates.h"
#include "CoreMinimal.h"
#include "InputBehavior.h"
#include "InputState.h"
#include "Templates/Function.h"
#include "UObject/ObjectMacros.h"
#include "UObject/UObjectGlobals.h"
 
#include "ClickDragBehavior.generated.h"
 
class UObject;
 
 
UCLASS(MinimalAPI)
class UClickDragInputBehavior : public UAnyButtonInputBehavior
{
    GENERATED_BODY()
 
public:
    INTERACTIVETOOLSFRAMEWORK_API UClickDragInputBehavior();
 
    FInputBehaviorModifierStates Modifiers;
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void Initialize(IClickDragBehaviorTarget* Target);
 
 
    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 Side) override;
    INTERACTIVETOOLSFRAMEWORK_API virtual FInputCaptureUpdate UpdateCapture(const FInputDeviceState& Input, const FInputCaptureData& Data) override;
    INTERACTIVETOOLSFRAMEWORK_API virtual void ForceEndCapture(const FInputCaptureData& Data) override;
 
    UPROPERTY()
    bool bUpdateModifiersDuringDrag = false;
 
protected:
    IClickDragBehaviorTarget* Target;
 
    bool bInClickDrag = false;
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickPressInternal(const FInputDeviceState& Input, EInputCaptureSide Side);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickDragInternal(const FInputDeviceState& Input, const FInputCaptureData& Data);
 
    INTERACTIVETOOLSFRAMEWORK_API virtual void OnClickReleaseInternal(const FInputDeviceState& Input, const FInputCaptureData& Data);
};
 
 
 
 
 
UCLASS(MinimalAPI)
class ULocalClickDragInputBehavior : public UClickDragInputBehavior, public IClickDragBehaviorTarget
{
    GENERATED_BODY()
protected:
    using UClickDragInputBehavior::Initialize;
 
public:
    virtual void Initialize()
    {
        this->Initialize(this);
    }
 
    TUniqueFunction<FInputRayHit(const FInputDeviceRay& PressPos)> CanBeginClickDragFunc = [](const FInputDeviceRay&) { return FInputRayHit(); };
 
    TUniqueFunction<void(const FInputDeviceRay& PressPos)> OnClickPressFunc = [](const FInputDeviceRay&) {};
 
    TUniqueFunction<void(const FInputDeviceRay& PressPos)> OnClickDragFunc = [](const FInputDeviceRay&) {};
 
    TUniqueFunction<void(const FInputDeviceRay& ReleasePos)> OnClickReleaseFunc = [](const FInputDeviceRay&) {};
 
    TUniqueFunction<void()> OnTerminateFunc = []() {};
 
 
public:
    //
    // IClickDragBehaviorTarget implementation
    //
    virtual FInputRayHit CanBeginClickDragSequence(const FInputDeviceRay& PressPos) override
    {
        return CanBeginClickDragFunc(PressPos);
    }
 
    virtual void OnClickPress(const FInputDeviceRay& PressPos) override
    {
        OnClickPressFunc(PressPos);
    }
 
    virtual void OnClickDrag(const FInputDeviceRay& DragPos) override
    {
        OnClickDragFunc(DragPos);
    }
 
    virtual void OnClickRelease(const FInputDeviceRay& ReleasePos) override
    {
        OnClickReleaseFunc(ReleasePos);
    }
 
    virtual void OnTerminateDragSequence() override
    {
        OnTerminateFunc();
    }
};