Hello and happy new year,

Because both manipulate the VISIBLE attribute, it is not possible to put an
expander inside a zbox. If the expander says its child is visible, then
when we tell the zbox to show some other child, the child that contains the
expander will hide the expander, but the expander's child will remain
visible.

Maybe invisibility should be handled internally as some kind of
refcounting? Changing the VISIBLE attribute at any level would only
increment/decrement an invisibility counter (being 0 by default), and only
when this invisibility counter is equal to 0 then should any control be
visible?

Regards,

-- 
Benoit.
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