4.7.1 - PostEditChangeProperty - MakeEditWidget - FVector - PropertyChangedEvent.Property Null

Development Programming & Scripting
16

I ran into this myself today! (On UE 4.11)
The editor is running FEdMode::InputDelta and in there it calls the post edit change commands with null as the property:

BestSelectedItem->PreEditChange(NULL);
    
if (bEditedPropertyIsTransform)
{
    SetPropertyValueByName<FTransform>(BestSelectedItem, EditedPropertyName, EditedPropertyIndex, LocalTM);
}
else
{
    SetPropertyValueByName<FVector>(BestSelectedItem, EditedPropertyName, EditedPropertyIndex, LocalTM.GetLocation());
}
    
BestSelectedItem->PostEditChange();

The actual property windows code uses things like the following:

UProperty* RelativeRotationProperty = FindField<UProperty>( USceneComponent::StaticClass(), "RelativeRotation" );
FPropertyChangedEvent PropertyChangedEvent( RelativeRotationProperty );

Object->PostEditChangeProperty( PropertyChangedEvent );

So it seems the only way to handle this is to look for null and then check against a manually cached variable.

Is there a reason why we couldn’t do a similar thing to the property window code here?