Ue crashes on RebuildWidget in custom button class

Development Programming & Scripting
1

I’ve created custom button class to have na opportunity to get clicked button reference onclick event. I did it like here
How to pass self-reference to UButton's OnClicked delegate (UMG)? - UI - Epic Developer Community Forums

But UE4 crashes after function RebuildWidget finishes. I have no idea what to do in this case.

GoodButton.h

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonClickedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonPressedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonReleasedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonHoveredRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonUnhoveredRefDel, UGoodButton*, ButtonRef);

UCLASS()
class TESTPL_API UGoodButton : public UButton
{
	GENERATED_BODY()
public:
	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
	FOnButtonClickedRefDel OnClickedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
	FOnButtonPressedRefDel OnPressedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
	FOnButtonReleasedRefDel OnReleasedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
	FOnButtonHoveredRefDel OnHoveredReferenced;
	UPROPERTY(BlueprintAssignable, Category = "Button|Event")
	FOnButtonUnhoveredRefDel OnUnhoveredReferenced;
	
protected:
	/** Handle the actual click event from slate and forward it on */
	FReply SlateHandleClicked();
	void SlateHandlePressed();
	void SlateHandleReleased();
	void SlateHandleHovered();
	void SlateHandleUnhovered();

protected:
	//~ Begin UWidget Interface
	virtual TSharedRef<SWidget> <b>RebuildWidget()</b> override;
#if WITH_EDITOR
	virtual TSharedRef<SWidget> RebuildDesignWidget(TSharedRef<SWidget> Content) override { return Content; }
#endif
	//~ End UWidget Interface

protected:
	/** Cached pointer to the underlying slate button owned by this UWidget */
	TSharedPtr<SButton> MyButton;
	
};

GoodButton.cpp

FReply UGoodButton::SlateHandleClicked()
{
	OnClickedReferenced.Broadcast(this);

	return FReply::Handled();
}

void UGoodButton::SlateHandlePressed()
{
	OnPressedReferenced.Broadcast(this);
}

void UGoodButton::SlateHandleReleased()
{
	OnReleasedReferenced.Broadcast(this);
}

void UGoodButton::SlateHandleHovered()
{
	OnHoveredReferenced.Broadcast(this);
}

void UGoodButton::SlateHandleUnhovered()
{
	OnUnhoveredReferenced.Broadcast(this);
}

TSharedRef<SWidget> UGoodButton::RebuildWidget()
{
	
	MyButton = SNew(SButton)
		.OnClicked(BIND_UOBJECT_DELEGATE(FOnClicked, SlateHandleClicked))
		.OnPressed(BIND_UOBJECT_DELEGATE(FSimpleDelegate, SlateHandlePressed))
		.OnReleased(BIND_UOBJECT_DELEGATE(FSimpleDelegate, SlateHandleReleased))
		.OnHovered_UObject(this, &UGoodButton::SlateHandleHovered)
		.OnUnhovered_UObject(this, &UGoodButton::SlateHandleUnhovered)
		.ButtonStyle(&WidgetStyle)
		.ClickMethod(ClickMethod)
		.TouchMethod(TouchMethod)
		.IsFocusable(IsFocusable)
		;

	if (GetChildrenCount() > 0)
	{
		Cast<UButtonSlot>(GetContentSlot())->BuildSlot(MyButton.ToSharedRef());
	}

	return MyButton.ToSharedRef();
}
2

I used to try overriding RebuildWidget() from UButton. Crashes ended but I had no reaction, when clicked the button (I’ve binded it in derrived blueprint class). I only could trigger it manually.

     TSharedRef<SWidget> OurWidget = Super::RebuildWidget();
3

Got it! I declared multicast delegate for onUnHover event which was an ecxessable! So we only need 4 delegates:

DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonClickedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonPressedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonReleasedRefDel, UGoodButton*, ButtonRef);
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnButtonHoveredRefDel, UGoodButton*, ButtonRef);

And 5 properties:

UPROPERTY(BlueprintAssignable, Category = "GoodButton|Event")
	FOnButtonClickedRefDel OnClickedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "GoodButton|Event")
	FOnButtonPressedRefDel OnPressedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "GoodButton|Event")
	FOnButtonReleasedRefDel OnReleasedReferenced;
	UPROPERTY(BlueprintAssignable, Category = "GoodButton|Event")
	FOnButtonHoveredRefDel OnHoveredReferenced;
	UPROPERTY(BlueprintAssignable, Category = "GoodButton|Event")
	FOnButtonHoveredRefDel OnUnhoveredReferenced;