TArray FGetter::CreateUObject

Development Programming & Scripting UI
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1

Hey,

I’ve tried to use slate c++ with the following tutorial Tutorial: Custom GUI with Slate Styles | Unreal Engine 4 blog .
But somehow I get some errors using

ATBCharacter:

FORCEINLINE float ATBCharacter::GetHitPoints()
{
	return hit_points_;
}

Slate widget construct():

#include "SSHealthBar.h"
#include "TBCharacter.h"


BEGIN_SLATE_FUNCTION_BUILD_OPTIMIZATION
void SSHealthBar::Construct(const FArguments& InArgs)
{
	TAttribute<float> value = TAttribute<float>::Create(TAttribute<float>::FGetter::CreateUObject(this, &ATBCharacter::GetHitPoints));

	//ChildSlot
	//[
	//	//SNew()
	//];
	
}
END_SLATE_FUNCTION_BUILD_OPTIMIZATION

none of the 2 overloads could convert all the argument types
1> with
1> [
1> ObjectType=float
1> ]
1> d:\programme\engines\ue4\epic games\4.7\engine\source\runtime\core\public\delegates\DelegateSignatureImpl_Variadics.inl(220): could be ‘TBaseDelegate TBaseDelegate::CreateUObject(UserClass ,float (__cdecl SSHealthBar:: )(void) const)’
1> with
1> [
1> ObjectType=float
1> , UserClass=SSHealthBar
1> ]
1> d:\programme\engines\ue4\epic games\4.7\engine\source\runtime\core\public\delegates\DelegateSignatureImpl_Variadics.inl(215): or ‘TBaseDelegate TBaseDelegate::CreateUObject(UserClass ,float (__cdecl SSHealthBar:: )(void))’
1> with
1> [
1> ObjectType=float
1> , UserClass=SSHealthBar
1> ]
1> while trying to match the argument list ‘(SSHealthBar const , float (__cdecl ATBCharacter:: )(void) const)’

header file

class TUTORIALBOX_API SSHealthBar : public SCompoundWidget
{
public:
	SLATE_BEGIN_ARGS(SSHealthBar)
	{}
	SLATE_END_ARGS()

	/** Constructs this widget with InArgs */
	void Construct(const FArguments& InArgs);
};

can anyone help?

2

Hi there!

GetHitPoints function should be const.

Cheers

3

Already tried this solution but it doesnt work. Still the Same error
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4

Could you paste entire class here? It works on my end so there must be something wrong with your implementation.

Btw. return hit_points_;why do you have underscore (_) ending your variable name?

5

I will Provider more code as fast as possible. It’s the trailing underscore naming convention for member variables. I don’t the naming Rules from Epic

6

updated my initial post, btw, which version do you use? i’m using 4.7

7

dude… you’re in the SHealthBar class, using ‘this’ and expect it be treated as UObject

you need to pass pointer to your character class to a widget or create and bind your widget in character class.

Check out the tutorial once again and read carefully.

8

omg, now i can see my problem… stupid mistake. well thank you!