Re: moving nested subwins

[Thomas Dickey]

On Wed, 6 Jun 2007, Bryan Christ wrote:

> Is moving nested subwins supported?  In other words, I have a

no.  It could be (as an extension ;-).

Note that in a WINDOW there's no record of the subwin/derwin's. ncurses 
keeps track (because I added it for memory-leak checking) of all of the 
WINDOW's created.  So one could extend ncurses to to something of this 
type.  I don't believe it would be portable to any other implementation 
though.

The workaround in portable applications is for the application
to keep track of the windows it has created, and move those.

> window->subwin1->subwin2 scenario.  I try to move subwin2 with mvderwin() but 
> it doesn't work properly.  My guess is similar to the "menu subwin moving" 
> problem which has been discussed a couple of times on this list.

Right - it's much the same case: there's a portable workaround for 
something that would be nice-to-have within the library.  The main 
difference here is that there's no associated user-window as in the menu 
which would list things.

That points to a better extension than a move_nested_windows: a function 
that would return the number of child-windows and the list of WINDOW* 
pointers, so an application could do whatever it wanted with the list. 
That would still lead to making things unportable, but would give a lot 
more leverage to developers than making ad hoc extensions for each 
"whatever".

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net