Multilayer

How realise multilayer apps, where some widgets can override other?

Cyrill Jakovlev wrote:

How realise multilayer apps, where some widgets can override other?

Cant think of the top of my head. In Html/CSS one could use the z-index.
In ruby-gnome one could cheat a tiny bit and use this widget which
allows absolute positioning, and could position widgets over each other.

Transparent widgets however, even if i.e. only 99% transparent, would be
kind of awesome… like a nice image as background, and overlaid on it a
text editor or similar.