WidgetComponent does not move along with actor

Development Programming & Scripting C++
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1

I added a WidgetComponent via C++ in my actor class and it does not move along
with my actor, when I move it. The Widget just stuck at the place where it was spawned.
If do the same in the actor blueprint and add WidgetComponent there it works.
The Widget moves along with my actor.
The WidgetComponent created via C++ has the same settings as the blueprint one and it
is a direct child of the root component like the blueprint one.
I don’t see, what I have to set, that the WidgetComponent moves along with the actor.
I tried to set some different attachment rules but that didn’t solve the problem.

// Create info widget component
IconWidget = CreateDefaultSubobject<UWidgetComponent>(TEXT("IconWidget"));
IconWidget->SetFlags(RF_MarkAsNative);
IconWidget->bEditableWhenInherited = true;
IconWidget->SetWidgetSpace(EWidgetSpace::Screen);
IconWidget->SetMobility(EComponentMobility::Movable);
IconWidget->SetDrawSize(FVector2D(32, 32));
IconWidget->SetCastShadow(false);
//IconWidget->SetVisibility(false);
//IconWidget->SetupAttachment(RootComponent);
//IconWidget->AttachTo(RootComponent,NAME_None,EAttachLocation::KeepRelativeOffset,false);
//IconWidget->AttachToComponent(RootComponent, FAttachmentTransformRules::KeepWorldTransform);
IconWidget->RegisterComponentWithWorld(this->GetWorld());

ConstructorHelpers::FClassFinder<UUserWidget> actorIconWidget(TEXT("/Game/Application/Blueprints/UserWidgets/SRS_ActorIcon.SRS_ActorIcon_C"));
if(actorIconWidget.Succeeded())
{
	IconWidget->SetWidgetClass(actorIconWidget.Class);
}

283740-2019-07-31-15-52-16-srs-unreal-editor.png

2

Hello FunnyBrod,

I attached a widget component to an actor the same way you did and didn’t have the issue you have. Is there anything else you did with your widget after setting it’s class?

From,

3

No, I just moved the actor.

4

Hello FunnyBrod,

Would you mind showing your .h as well? Also, you should try attaching up your Widget manually as well. I had issues that only happened when I didn’t do that.

...
IconWidget = CreateDefaultSubobject<UWidgetComponent>(TEXT("IconWidget"));
	IconWidget->SetupAttachment(RootComponent);
	if (IconWidget)
	{
...

From,

5

Hey

I’ve tried it with SetUpAttachment(…), AttachTo(…) and AttachToComponents(…) with different parameters. I didn’t work.
Meanwhile, I created the icon widget in the blueprint instead of creating it in C++.
When I have the time I take a look into the Unreal source code and find out what are they doing when I create a WidgetComponent in the blueprint. And find the missing parameters or differences.
It’s a little bit bugging me, that I can’t find the solution :wink:

UCLASS(Blueprintable)
class SRS_API ACarAssetActor : public AActor, public ICarIActor
{
	GENERATED_BODY()
public:
	ACarAssetActor ();
...
	// Widget component
	UPROPERTY(Blueprintable, EditAnywhere, BlueprintReadWrite)
	UWidgetComponent* IconWidget;
..
}

Regards Gerrit.

6

Hello FunnyBrod,

If you are willing to send me your source files I would be willing to take a look at them. If you end up determining this is a bug you can submit it here.

7

Hi .

Lucky me, I have just learned that I have access to the Unreal (enterprise) customer support in the next few weeks.
So, if i don’t find the solution, the support will hopefully.
I will post the solution or bug here.
Thanks for the effort.

8

Same problem here.

9

Is there any update?

10

There is update.

I suffered from this problem too. And I found some solution. you can add SetAbsolute function to constructer in your Actor. you can also use this function in your widget component constructer.

Like this :

YourWidgetComponent->SetAbsolute(false, false, false);

This function changes the relative transform of your component from world to parent.

Nevertheless if your widget doesn’t move, I recommend to do following actions.
Content Browser > [Right click your Actor BP inherited C++ class] > Asset Actions > Reload
Instead you can add this code to BeginPlay not constructor.
I have experienced frequently constructer code is not refreshed well after modifying.

I hope it helps you.

1 Like
11

The proposed solution didn’t work for me. What worked was moving the declaration from protected to public space:

public:
	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly)
	TObjectPtr<USceneComponent> Root;
	UPROPERTY(EditDefaultsOnly, BlueprintReadOnly)
	UWidgetComponent* WidgetComponent;

My constructor looks like this:

	Root = CreateDefaultSubobject<USceneComponent>("RootComponent");
	SetRootComponent(Root);
	
	WidgetComponent = CreateDefaultSubobject<UWidgetComponent>("WidgetComponent");
	WidgetComponent->SetupAttachment(Root);