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How do you cast a struct to a derived struct?

I always want to show the mouse cursor, when I am in UIOnly or GameAndUI InputMode. So I thought I would be clever and would override SetInputMode() in my PlayerController class:

 void ABasePlayerController::SetInputMode(const FInputModeDataBase & InData)
 {
     Super::SetInputMode(InData);
     const FInputModeDataBase* InDataPtr = &InData;
     const bool bIsGameOnlyInput = static_cast<const FInputModeGameOnly*>(InDataPtr) != NULL;
     bShowMouseCursor = bIsGameOnlyInput ? false : true; // Always show the mouse, when in UI Mode
 }

Fortunately the code is compiling, but unfortunately the code is not working. When I log out bIsGameOnlyInput, it is always true, even though I am clearly in GameAndUI InputMode, because I can interact with my UI and I can control my Pawn.

Do You have any ideas, how else I can check whether the "const FInputModeDataBase & InData" parameter is of type FInputModeGameOnly?

Product Version: UE 4.13
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asked Sep 20 '16 at 10:40 AM in C++ Programming

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AllJonasNeeds
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