When I create my DrawableComposite (with the background from another DrawableComposite) via its copy constructor
it seems to be created correctly and I can add other controls and receive events.
Unfortunately I can't always use the copy constructor. Now I thought I should be able to achieve the same results by instead
But then later added controls have wrong positions and I don't receive (mouse) events anymore.
doesn't seem to help. What do I miss here?