On Friday, 21 February 2020 at 13:36:58 UTC, mark wrote:
I thought that onChangeState was never called before the Label was constructed
That's one of the 'features' (wink wink) of GtkD. It's possible to call the function as a class function (uninstantiated, in other words) or as an object function (instantiated). There are times when it's handy to have either at your disposal.
Now it works. Thanks!