How to show the mouse cursor at runtime in C++?

Development Programming & Scripting C++
1

Hello,

C++ in Unreal is still unclear for me. I’d like to show the mouse cursor at runtime in C++ and the code seems to be compiled but it doesn’t work in Unreal Editor.
In the default MyCharacter.h I added the code:


UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
class APlayerController* MyController;

And in the default MyCharacter.cpp I added (in the constructor) the code:



//I don't know if
MyController = GetWorld()->GetFirstPlayerController(); //either this code should be 
MyController = CreateDefaultSubobject<APlayerController>(TEXT("MyController")); //or this one

//they both can be compiled, but make the UE Editor crash

MyController->bShowMouseCursor = true;
MyController->bEnableClickEvents = true;
MyController->bEnableMouseOverEvents = true;

The problem is that I’m not sure how I should get the character’s controller from my character.

2

Your character already has a controller, assuming it was spawned correctly. So you can just use GetController() to get it.



APlayerController* PC = GetController();

if (PC)
{
PC->bShowMouseCursor = true; 
PC->bEnableClickEvents = true; 
PC->bEnableMouseOverEvents = true;
}
1 Like
3

I assume I should place this code in the .cpp file only. But I get the error:

D:\Unreal Projects\Test48\Source\Test48\Test48Character.cpp(50): error C2440: ‘initializing’ : cannot convert from ‘AController *’ to ‘APlayerController *’
1> Cast from base to derived requires dynamic_cast or static_cast

So I see the types aren’t the same. Should I use the casting to get the correct type?

4

Yes, my mistake, sorry. You either need to cast it to APlayerController or you can just use AController. So you need to either change your code to this:



APlayerController* PC = Cast<APlayerController>(GetController());

if (PC)
{
PC->bShowMouseCursor = true; 
PC->bEnableClickEvents = true; 
PC->bEnableMouseOverEvents = true;
}

Or this:



AController* PC = GetController();

if (PC)
{
PC->bShowMouseCursor = true; 
PC->bEnableClickEvents = true; 
PC->bEnableMouseOverEvents = true;
}
3 Likes
5

Thank you, the first one is working for me - at least no problems with starting the Unreal Editor. The second doesn’t because there are no such members in AController*. The mouse cursor still disappeared at runtime, but OK I will play tomorrow.

Yes, casting… Unreal C++ is specific and I’m downloading Tom Looman’s Epic Survival Game Series to learn it. Epic Team should do something to make C++ more friendly for users, at least more updated C++ videos for beginners. It’s essential for Unity users like me.

6

Try this