[HELP] Custom Struct Property Editor Add Setter and Listener

Development Programming & Scripting
1

I have been struggling with this for a while and would really appreciate some guidance.

The goal is to create a dropdown list/combo box that contains strings that the user can select in the editor. This is to extend details customization.

I have created a custom structure like so.

USTRUCT()
struct FTaskComponentData
{
	GENERATED_BODY()

	UPROPERTY(VisibleAnywhere)
	TArray<FString>												Names;

};

Then I have created a class to implement the IPropertyTypeCustomization like so:
(Header file):

class FTaskComponentDataCustomization : public IPropertyTypeCustomization
{
public:
	static TSharedRef<IPropertyTypeCustomization> MakeInstance();
 
	/** IPropertyTypeCustomization interface */
	virtual void CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils) override;
	virtual void CustomizeChildren(TSharedRef<class IPropertyHandle> StructPropertyHandle, class IDetailChildrenBuilder& StructBuilder, IPropertyTypeCustomizationUtils& StructCustomizationUtils) override;
 
private:
	TSharedPtr<IPropertyHandle> UPropertyTaskNameHandle;

	/** Visibility delegate for the various methods of calculating magnitude */
	EVisibility GetPropertyVisibility(UProperty* InProperty) const;
};

(Source file):

TSharedRef<IPropertyTypeCustomization> FTaskComponentDataCustomization::MakeInstance()
{
	return MakeShareable(new FTaskComponentDataCustomization());
}
 
void FTaskComponentDataCustomization::CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, class FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
{
	uint32 NumChildren;
	StructPropertyHandle->GetNumChildren(NumChildren);
 
	for (uint32 ChildIndex = 0; ChildIndex < NumChildren; ++ChildIndex)
	{
		const TSharedRef< IPropertyHandle > ChildHandle = StructPropertyHandle->GetChildHandle(ChildIndex).ToSharedRef();
 
		if (ChildHandle->GetProperty()->GetName() == TEXT("Names"))
		{
			UPropertyTaskNameHandle = ChildHandle;
		}
	}
 
	check(UPropertyTaskNameHandle.IsValid());


	static TArray< TSharedPtr<FString>> something;

	something.Add(TSharedPtr<FString>(new FString("One")));
	something.Add(TSharedPtr<FString>(new FString("Two")));
	something.Add(TSharedPtr<FString>(new FString("Three")));


	HeaderRow.NameContent()
		[
			StructPropertyHandle->CreatePropertyNameWidget(LOCTEXT("Task", "Task Names"), LOCTEXT("IDK","IDK"), false, true, false)
		]
	.ValueContent()
		.MinDesiredWidth(250)
		[
			SNew(STextComboBox)
			.OptionsSource(&something)
		];
}
 
void FTaskComponentDataCustomization::CustomizeChildren(TSharedRef<class IPropertyHandle> StructPropertyHandle, class IDetailChildrenBuilder& StructBuilder, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
{
}
 

EVisibility FTaskComponentDataCustomization::GetPropertyVisibility(UProperty* InProperty) const {
	return EVisibility::Visible;
}

I have then included this custom structure in my component subclass like this:

UPROPERTY(EditAnywhere, Category = "Planning | Task")
FTaskComponentData							TaskData;

I then register with the FPropertyEditorModule like so:

FPropertyEditorModule& PropertyModule = FModuleManager::LoadModuleChecked<FPropertyEditorModule>("PropertyEditor");

	//Custom properties
	PropertyModule.RegisterCustomPropertyTypeLayout("TaskComponentData", FOnGetPropertyTypeCustomizationInstance::CreateStatic(&FTaskComponentDataCustomization::MakeInstance));

At this point, the desired combo box shows up… I have 2 questions:

  1. How can I set TArray so that I can update the data members with different strings?

  2. How do I register the property change listener? Right now, none of the property change listeners are fired from my component when I try to select values from my combobox.

Or where do I got to dig up any of this functionality?