Sub component not affected by PostEditChangeProperty

Development Programming & Scripting
1

I created a sub component within a component. Then chain their changes together.

// in constructor
subSM = CreateDefaultSubobject<UStaticMeshComponent>("Sub SM");
subSM->SetupAttachment(this);

SetRelativeLocation(FVector(0, 0, 0));
subSM->SetRelativeLocation(FVector(200, 0, 0));

...

// in PostEditChangeProperty
SetRelativeLocation(FVector(0, 0, testHeight*100));
subSM->SetRelativeLocation(FVector(200, 0, testHeight*100));

SetRelativeScale3D(FVector(testScale));
subSM->SetRelativeScale3D(FVector(testScale));

The sub component is supposed to change with the outer component.

So, for example, if I set the outer’s scale to 2, the subcomponent’s effective scale should be 4.

However, upon releasing mouse, the subcomponent’s values automatically revert back to default…

GIF:

285278-subcoj-editor-change.gif

Where did I do wrong??

Code:

#pragma once

#include "CoreMinimal.h"
#include "Components/StaticMeshComponent.h"
#include "SubSMCompTest.generated.h"

/**
 * 
 */
UCLASS(Blueprintable, ClassGroup = (Custom), meta = (BlueprintSpawnableComponent))
class DLCOREUTIL_API USubSMCompTest : public UStaticMeshComponent
{
	GENERATED_BODY()
private:
	UStaticMeshComponent *subSM;

public:
	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta = (UIMin = "0.0", UIMax = "2.0"), Category = "Test")
	float testScale;
	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta = (UIMin = "0.0", UIMax = "2.0"), Category = "Test")
	float testHeight;


	USubSMCompTest();

	virtual void PostInitProperties() override;

	void UpdateSM();

#if WITH_EDITOR
	virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
#endif
};

cpp:

#include "SubSMCompTest.h"
#include "Runtime/CoreUObject/Public/UObject/ConstructorHelpers.h"


USubSMCompTest::USubSMCompTest() 
: testScale(1), testHeight(0){
	subSM = CreateDefaultSubobject<UStaticMeshComponent>("Sub SM");
	subSM->SetupAttachment(this);

	SetRelativeLocation(FVector(0, 0, 0));
	subSM->SetRelativeLocation(FVector(200, 0, 0));

	static ConstructorHelpers::FObjectFinder<UStaticMesh> conemesh(TEXT("StaticMesh'/Engine/BasicShapes/Cone.Cone'"));

	SetStaticMesh(conemesh.Object);
	subSM->SetStaticMesh(conemesh.Object);

	SetMobility(EComponentMobility::Movable);
	subSM->SetMobility(Mobility);

	UpdateSM();
}


void USubSMCompTest::PostInitProperties() {
	Super::PostInitProperties();

	UpdateSM();
}

#if WITH_EDITOR
void USubSMCompTest::PostEditChangeProperty(FPropertyChangedEvent& e) {
	Super::PostEditChangeProperty(e);

	UpdateSM();
}
#endif


void USubSMCompTest::UpdateSM() {
	SetRelativeLocation(FVector(0, 0, testHeight*100));
	subSM->SetRelativeLocation(FVector(200, 0, testHeight*100));

	SetRelativeScale3D(FVector(testScale));
	subSM->SetRelativeScale3D(FVector(testScale));
}