How to use a widget function inside myCharacter class

Development Programming & Scripting UI
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1

Hi

I have a problem to put widget in my Character Class.

my GameMode class has a UUseWidget already like below.

.h

public:

UFUNCTION(BlueprintCallable, Category = "UMG")
void ChangeMenuWidget(TSubclassOf<UUserWidget> NewWidgetClass);
UUserWidget* GetCurrentWidget() const;

protected:

virtual void BeginPlay() override;
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "UMG")
TSubclassOf<UUserWidget> StartingWidgetClass;
UPROPERTY()
UUserWidget* CurrentWidget;

};

.cpp

void ADDModeBase::BeginPlay()

{

Super::BeginPlay();
ChangeMenuWidget(StartingWidgetClass);

}

void ADDModeBase::ChangeMenuWidget(TSubclassOf NewWidgetClass)

{

if (CurrentWidget != nullptr)
{
	CurrentWidget->RemoveFromViewport();
	CurrentWidget = nullptr;
}
if (NewWidgetClass != nullptr)
{
	CurrentWidget = CreateWidget<UUserWidget>(GetWorld(), NewWidgetClass);
	if (CurrentWidget != nullptr)
	{
		CurrentWidget->AddToViewport();
	}
}

}

UUserWidget* ADDModeBase::GetCurrentWidget() const

{

return Cast<UUserWidget>(StartingWidgetClass);

}

Here I want to use StartingWidgetClass that is a UUMG_PlayUI class in myCharacter Class.

I had to create UUserWidget* Name; variable. but i can get that StartingWidgetClass.

Actualy, UUMG_PlayUI! without CreateWidget<>.

How to use a userwidget’s function in my character class?

2

Do I understand you right, that you want to call a function which you declared in your widget blueprint?
I don’t think that is directly possible. The way, you can call blueprint functions is by declaring a BlueprintNativeEvent in your C++ class and have a blueprint implementing it. Then you can call it in your code and the logic inside the blueprint gets executed.

3

I have created some function in UUMG_PlayUI with C++. not blueprint.

void ACharacterPC::BeginPlay()
{
Super::BeginPlay();
ADeepForestGameModeBase* GameMode = (ADeepForestGameModeBase*)GetWorld()->GetAuthGameMode();
UMG = CreateWidget<UUMG_PlayUI>(GetWorld(), GameMode->StartingWidgetClass);
}

This is the code to referencing the widget.
The UMG can’t get the correct widget. This is the problem.
Some way, I can get the UUMG_PlayUI. but created variables are null.

4

So the problem is that UMG variable in Character is null? What is the type of this variable and is StartingWidgetClass set?

There is a problem in your code: Your GetCurrentWidget function will likely return a nullpointer

5

Right. the GetCurrentWidget is not using currently.
I might don’t know how to get UserWidget from the world().

UUMG_PlayUI::UUMG_PlayUI(const FObjectInitializer& PCIP) :Super(PCIP)

{
textDisplay = nullptr;
textComboBox = nullptr;
}

void UUMG_PlayUI::NativeConstruct()

{
Super::NativeConstruct();

if (textDisplay == nullptr)
{
	textDisplay = (UTextBlock*)GetWidgetFromName(TEXT("DisplayText"));
	textDisplay->SetText(FText::FromName(TEXT(" ")));
}
if (textComboBox == nullptr)
{
	textComboBox = (UTextBlock*)GetWidgetFromName(TEXT("ComboBox"));
	textComboBox->SetText(FText::FromName(TEXT(" ")));
}

}

void UUMG_PlayUI::SetCombo(int32 ComboCount)

{
FString Info = FString::Printf(TEXT(“COMBO : %d”), ComboCount);
textComboBox->SetText(FText::FromString(Info));
}
void UUMG_PlayUI::SetDisplay(FString Info)
{
textDisplay->SetText(FText::FromString(Info));
}

This is my UMG_PlayUI class. In Character class, want to call the SetCombo function like
SetCombo(ComboCount);