How to set property values for InstancedReferences

Development Programming & Scripting C++
1

I’m doing a custom struct property layout that would allow me to set a UObject property value through a custom widget interface. I usually do this by getting a property handle to the property I am editing, then setting or getting the value through the handle.** In this example, I am trying to modify a UCameraComponent property.**

Below is an example of how I retrieve the property handle. This step is fine.


void FCustomStructCustomization::CustomizeHeader(TSharedRef<class IPropertyHandle> StructPropertyHandle, FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& StructCustomizationUtils)
{
    uint32 NumChildren;
    StructPropertyHandle->GetNumChildren(NumChildren);

    for(uint32 i = 0; i < NumChildren; i++)
    {
        TSharedPtr<IPropertyHandle> Prop = StructPropertyHandle->GetChildHandle(i);

        if(Prop->GetProperty()->GetFName() == FName("MyPropertyName"))
        {
            // Store this property handle for later..
            MyPropertyHandle= Prop;
        }
    }

The issue is, when the time comes for my UI to change the value of my property, my usual method no longer works. I set the value after an item from a ListView is selected.


    if(SelectionInfo == ESelectInfo::OnNavigation)
    {
        return;
    }

    if(MyPropertyHandle.IsValid() && MyPropertyHandle->IsValidHandle())
    {
        UCameraComponent* component = // component pointer I acquired from the owning actor using GetComponents(TArray<UCameraComponent*>)
        MyPropertyHandle->SetValue(component);
    }

I expected that would cause the UProperty in my struct to now point to the CameraComponent I acquired from the actor. The above fails as detailed in the source code implementation:


FPropertyAccess::Result FPropertyHandleObject::SetValue( const UObject* const& NewValue, EPropertyValueSetFlags::Type Flags )
{
    UProperty* Property = Implementation->GetPropertyNode()->GetProperty();

    bool bResult = false;
    // Instanced references can not be set this way (most likely editinlinenew )
    if( !Property->HasAnyPropertyFlags(CPF_InstancedReference) )
    {
        FString ObjectPathName = NewValue ? NewValue->GetPathName() : TEXT("None");
        bResult = Implementation->SendTextToObjectProperty( ObjectPathName, Flags );
    }

    return bResult ? FPropertyAccess::Success : FPropertyAccess::Fail;
}

So it appears that the UPROPERTY I am modifying is an InstancedReference. I am not sure of the implications but that is not surprising for an actor component. Is there a way to set the property nonetheless? Or is it impossible by design?